Saturday, June 30, 2012

EMERSON - SYLVANIA and MAGNAVOX TVs SERVICE MODE ADJUSTMENTS



APPLICABLE TO 

EMERSON - LC190WM1
SYLVANIA -LC190SL1
MAGNAVOX - 19MF330B/F7

TO ENTER SERVICE MODE

  • Turn ON the Power.
  • Press "Menu" button to display Setup Menu.
  • Select 'Features".
  • Select "Current software Info".
  • key in [0],[4],[2],[5],[7],[4] & [Info] buttons on the remote handset.  The service mode screen will appear.
HOW TO INITIALIZE THE TV

The purpose of initialization is to place the set in a new out of box condition.  The customer will be prompted to select a language and program channels after the set has been initialized.

To put the program back at factory default, initialize the LCD TV using the following procedure.
  1. Turn On the power.
  2. Enter the service mode. To cancel service mode, press Power button on the remote control.
  3. Press "Info" button on the remote control to initialize the TV.
  4. "INITIALIZED" will appear in upper right of the screen.  "INITIALIZED" color will change to green from red when initializing is completed.




HOW TO ENTER SERVICE MODE TO SHARP - 21VL-L



SERVICE MODE
  • Service mode is switched by 'SERVICE' key, CH UP + VOL DN when reset.
  • Service mode can be cancelled by 'SERVICE' key, during service mode.
  • Service mode can be switched by using 'MENU' key to other 5 modes.
  1. Adjustment mode.
  2. Setting mode
  3. Confirmation mode.
  4. Option mode.
  5. NVM edit mode.
  • During service mode, AFT operation is prohibited.  The setting data for PLL is always set to data. 
  • During Service Mode, the following user data are set to default value and stored as last memory. Picture/Tint/Color/Bright/Sharp/Color Temp/bass/Treble/Balance/MTS/FAO/Speaker/energy Save.
  • During Service Mode. OSD display for ON/OFF is toggled via (CH CALL) key.  At display OFF condition, if changing adjustment data, channel, input source, it remains display OFF.  At display OFF condition, if changing adjustment item, it returns to display ON.
  • During service mode, the following operations are prohibited.  Closed Caption/No Signal Blue Screen.
  • During service mode, sound is muted [only MTSIC] except when selecting the following items.  V24,M01.
AUTO ADJUSTMENT

H-VCO
  1. When there is H-Vco auto adjustment key input at item H-VCO, auto adjustment will be implemented.
  2. H-FREE (1chip) is set 1.
  3. H-OUT (1 chip) is set by intelligent monitor output.
  4. IM input becomes TIM input.
  5. H-VCO (1 chip data) is changed so that the number is 126 inside 8ms interval.
  6. When adjustment is completed, OSD display and H-VCO auto adjustment data of EEPROM  are updated.
  7. H-FREE (1chip), intelligent monitor output, IM input mode are recovered.
RF-AGC
  • If there is RF-AGC auto adjustment key input at at item PIF-VCO, auto adjustment will be implemented.
  • VIF-DEF (1chip) is set to 1.
  • AFT output (1chip) is set by intelligence monitor output.
  • IM input becomes AD input.
  • RF-AGC (1chip) is decreased from current RF-AGC value to '0'.  The maximum AFT input voltage is obtained.
  • RF-AGC (1chip) is increased until at the point of AFT input voltage is max [0.3V] adjustment is completed.
  • When adjustment is completed , OSD display and RF-AGC auto adjustment status in EEPROM is updated.
  • Intelligent monitor output, IM input mode are recovered.
PIF-VCO
    1. If there is PIF-VCO auto adjusment key input at item PIF-VCO, auto adjustment will be implemented.
    2. VIF-DEF (1chip) is set to 1.
    3. AFT output (1chip) is set by intelligent monitor output.
    4. Im input becomes AD input.
    5. VIF-VCO (1 chip) is changed so that the input voltage becomes 2.5V.
    6. When adjustment is completed, OSD display and PIF-VCO auto adjustment status in EEPROM will be updated.
    7. VIF-DEF (1chip) intelligent monitor output, IM input mode are recovered.
S-TRAP
  1. If there is S-TRAP auto adjustment key input at item S-TRAP, auto adjustment will be implemented.
  2. S_TRAP output is set by intelligent monitor output.
  3. IM input becomes AD input.
  4. S-Trap (1chip) is set to the value of V45[S-TRAP ADJ start]
  5. S-Trap_result is set to the value of V45 (S-TRAP ADJ start).
  6. S-Trap (1chip) is increased until the minimum input voltage becomes minimum.
  7. Wait 20ms before sampling the the new_AD_Data.
  8. When adjustment is completed, OSD diisplay and S-Trap auto adjustment status in EEPROM are updated.
  9. S-Trap (1chip) intelligent monitor output, IM input mode are recovered.

Friday, June 29, 2012

PANASONIC TC L42D30 SERVICE MODE AND BLINKING CODES

After exchange parts, check and adjust the contents of adjustment mode.
HOW TO ENTER SERVICE MODE
  • While pressing (Vol -ve) button on the front panel of the TV, and press 'Info" button on the remote control [3times, within 2 seconds].
KEY COMMANDS
[1] Button => Main items selection in forward direction.
[2] Button => Main items selection in reverse dirction.
[3] Button => Sub items selection in forward direction.
[4] Button => Sub items selection in reverse direction.
[VOL] Button => Change the value of sub items in forward or reverse direcion.
TO EXIT FROM SERVICE MODE
Switch OFF the Power, using Power Button on the front panel of the TV.
HOTEL MODE
Is used to restrict a function for Hotels.
  • Access command to the hotel mode setup menu:
  • While pressing the (Vol-ve) button on the main unit, press 'Input" button of the remote control 3 times within 2 seconds.
  • To exit from hotel mode setup, disconnect AC power from wall socket.
DATA COPY BY SD CARD
When exchanging A board, the data in original A board can be copied to SD card and then copy it in new A board.  When installing number of units in hotel or any facility, the data in master TV can be copied to SD card and then copy to other.
PREPARATION
  • Insert an empty SD card to your PC.
  • Right-click a blank area in SD card window, point New, and then click text document. A new file is created by default.
  • Right-click the new text document that you just created and select 'rename', and then change the name and extension of file to the following file name for (a) or (b) and press Enter.
  • File name: (a) For board replacement: bordreplace.pwd  (b) For Hotel:  hotel.pwd
Make only one file to prevent the operation error.  No any other file should be in SD card.
DATA COPY TO SD CARD FROM TV SET
  1. Turn ON the TV set.
  2. Insert SD card with a start up file(pwd file) to SD slot.
  3. Input a following password:  For board replacement: [2770].  For Hotel: [4850].  Data will be copied from TV set to SD card.  It will take up to 6 minutes to complete.
  4. After completion of copying to SD card, remote SD card from TV set.  
  5. Turn OFF the TV set. 
Following new folder will be created in SD card for data from TV set.
  • For board replacement: user_setup
  • For Hotel: hotel
DATA COPY FROM SD CARD TO TV SET
  • Turn ON the TV set.
  • Insert SD card with data ot SD slot.  On screen display will be appeared according to the Data Folder automatically.  
  • Input the following password for board replacement: [2771].  For Hotel: [2771].  Data will be copied from SD card to TV.
  • After completion of copying SD card, remove SD card from TV set.  For board replacement: Data will be deleted after copying.  For Hotel: Data will not be deleted, and can be used for other TVs.
Depending on the failure of boards, function of Data Copy for board replacement does not work.This function can be effective among the same model numbers.
POWER LED BLINKING 
  • 1 Blink => Back light SOS => LCD panel _ P-Board
  • 3 Blinks => Tuner SOS => A-Board _ P-Board.
  • 4 Blinks => P 15V SOS => A-Board _ P-Board
  • 7 Blinks => Sub 3.3V SOS => A-Board
  • 9 Blinks => Sound SOS => A-Board _ Speaker.
  • 10 Blinks => ZWE12 SOS => LCD Panel.
  • 13 Blinks => Emergency SOS => A-Board.
LCD PANEL TEST MODE
How to Enter & Exit
While pressing [Vol-ve]  button on the main unit, press Sub Menu button on the remote control 3 times within 2 seconds. Disconnect the AC plug to Exit.
How to Confirm
If abnormal picture is displayed, go to LCD panel test mode to display several test patterns. And then judge by the following method. Still abnormal picture is displayed, the cause must be LCD panel. If normal picture is displayed, the cause must be A board.
Test pattern is created by the circuit in the LCD panel.  In LCD panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signals.  If the normal picture is displayed, LCD panel must be okay, and cause of failure must be A board.

PIONEER & SONY FLAT PANEL TVs [REPAIR HINT]



PIONEER 50" PLASMA [DISPLAY ONLY] [Seperate Tuner Type]
TV turns ON, but the screen flashes green color.   A clear indication of Y-sustain board fault.  Replaced, checked OK. 
Pioneer 50" Plasma Y-sustain board.

SONY  KDL-40V2500 LCD TV
Set turns ON and stays for a few seconds, and shuts down.  Bak light inverter board fault.  Internal winding short in one among the inverter transformer at the back light inverter board.  Cannot detect by normal Ohms measuring techniques.  Even a single turn shorts, it will put a high load at the power supply board, and protection circuit will sense it, and will shut the system OFF.
KDL 40V2500 BACK LIGHT INVERTER
SONY LCD 4100 [46" LCD TV]
 There is back light.  But no audio or video.
If unplug one ribbon wire to LCD panel, which goes from LCD control board, the backlight is ON.  But, picture is only at the half of the screen. [Half Screen Picture]. 
Nothing to be checked out.  Panel is faulty.  [This is a common fault to most of the Sony LCD TVs].
SONY KDL-32L4000

  • No power. No video. No audio. No light at its front panel.  
  • Further checking revealed that, there was no Data from EEPROM IC.  No information at I2C bus.  Clear indication of main board fault.  Replaced the main board.  solved the problem.

SONY KDL 32L4000 MAIN BOARD


HITACHI FLAT PANEL TV REPAIR HINTS



HITACHI 42HDT52A

Set dead.  do not turn ON.
Checked the poser supply.  Found OK.  
Checked the main board.  [JA05958] found defective.  Changed the IC I 106 solved the problem.

HITACHI 55HDT52

Set turns ON, but there was no picture.  Checked all the voltages comes out from the SMPS.  Found almost OK, but not so accurate as schematic indicates.  Repalced [50N50] MOSFET.  Checked OK. 

HITACHI P50T501

Set turns ON but it goes OFF within 3 seconds. No audio, No video.  Protection circuit detects some power supply short.  
Replaced IC 3294F on ND60200-0057; Tested OK.  

HITACHI 55HDT52

Turns ON and shuts down.  On further checking, found a blown IC M801 on buffer board.  Replaced the same [SN755866] solved the problem.  The IC was available.  In most cases the buffer board [ND 60200-0033] might need replacement as card basis.


PHILIPS and ELEMENT TV REPAIR HINTS



PHILIPS 42PF7220/37

No picture, No sound.  TV turns On & OFF automatically.

Missing voltages from the power supply to other boards.  Check and resolder all connection terminals at the connector [C221].

PHILIPS PFL 37 xxxxx LCD TV

TV turns ON, but shuts down for no reason.  It happens each time when switch ON the set by AC mains ON/OFF switch.  
Signal to microprocessor get On/OFF.  Develops this fault.  Bad front panel sendor board [infrared].  Capacitor faults. Some of the SMD capacitors fitted on it are leaking, cause voltag drop. 

ELEMENT 32" LCD RECEIVER.

TV turns ON.  But, No video or Audio.

If the +12V supply rail drop, this kind of fault can occur.  In practice, it was measure +7.6VDC instead of +12V, and +13VDC instead of +24V
Changed the optocoupler. Check the power supply and replace the voltage control opto-coupler. 

VIZIO HDTV FAULTS AND REPAIR TIPS


Cont:
VIZIO L32HDTV10A
No Power.  
Power supply switching regulator board fault.  Check the fuse on the power supply board.  If found opened, check for any short circuted components, like capacitors connected in parellel to AC, Rectifier diodes [block].  If no fault found to these component/s, the main switching regulator is faulty.  It will be best to replace this board as card basis, rather than making 'surgery' to it.
The power supply bard number is [DPS-199AP].  If this board is not available, [FS-P201-3M01] can be substituted.  
VIZIO - VX32LHDTV10A
All other functions, picture, sound are OK, but remote control function do not works.  
Check the remote control handset first for its infrared emission.  The procedure to check the remote control has been given in detail in this blog.  Pull up older posts.  If the remote control handset is found OK. Th remote control sensor inside the set should be checked. Check for any shorted SMD capacitor/s on the infrared sensor board.  In most cases one 1MKF capacitor to this board is found fault.  Remove it from circuit.  Even if there is no capacitor in this place, the remote control function will work properly.  
VIZIO - VX42LHDV10A
No video, No sound.
Missing 24V and 12V from the power supply board.  Power supply regulator board fault.  Original power board to this model is [DPS-283AP].  This board can be substituted be [DPS-319AP].
VIZIO - VX37LHDTV10A
Switches ON, shows a blue screen for about 3 seconds and shuts down.
Concentrate on the condition of CCFL lamps in the panel.  If any one among them is burned, this type of fault can occur.  
To know about which CCFL lamp has burned, connect the pin number (15) of IC 0Z9966SN, to ground by using a 10KOhms resistor.  By doing this, short circuit protection will be off.  After all repair, remove this resistor from circuit.  With this connection, all the back light CCFL lamps will light up, and the bad one which not lights up can be detected.  
VIZIO - P42HDTV10A
Set turns ON.  Has flashing "dots' all over the screen with picture.
REPLACE THE LOGIC CONTROL BOARD [077B].
No other repair should be done.

VIZIO TVs FAULTS AND REPAIR HINTS



VIZIO 42" LCD TV
Inverter boards, both Master and Slave blows occationally.  Within 10  of 12 days
The fault is due to its circuit design, and this fault occur to most models of Vizio TVs.  Start voltages and current will be high, and CCFL lamps changes internal parameters after 1 or 2 years of working period.  To lower the starting current is the only repair can be done, by inserting proper value of resistor, capacitor, and zener diode to lower the starting current.  This fault is not curable by customer, as it need through knowledge in electronics, and ability to follow the circuit and schematic diagram.
VIZIO - P42HDTV10A
No picture, no sound and screen do not comes ON.
Y_Sustain board fault.  There is a fuse [4A] at Y-Sustain on-board.  A suface mount type device.  Check whether it has burned out.  If it has opened, try replacing (YPPD-J018C).  In most cases this work will help you.  Anyway, it will be best to replace the Y-Sustain board as card basis.  Contact the nearest authorised service center for Vizio to buy this board.
VIZIO - GV42L HDTV LCD
No picture, No sound.
Main board should be checked, provided power supply remains OK.
In most cases the IC U-11 will get damaged.  Replace it will solve the problem.
VIZIO - P50HDTV10A
No picture, No sound.  Set powers ON.
The fault is with Y-Sustain board.  [YPPD-016] IC should be checked.  Replace this IC, or replace the bard as card basis.  Replacing it as card basis will be the best.
VIZIO - VP50HDTV20A
Turns ON, shuts down immediately. No picture.
Check the Top and Bottom buffer boards to these model sets.  Replace them at one time.  This is a common problem the this model.
VIZIO - VP422HDTV10A
Set works fine for 10 to 15 minutes, and picture and sound goes out.  No Menu on sereen.  Only flashing lines.  
Main board fault.
Replace the main board.  Buy it from authorised service center for Vizio.
VIZIO - GV471HDTV10A
The problem is intermittent.  Sometimes works properly.  Sometime no video or sound or both.
The [1.8V]  voltage regulator MPS1117 on the main board should be checked.  If this voltage drops too much, or not at all, this type of fault can occur.  Replace this regulator  first.  It is on the main board [U5].  If this do not help, replace the main board.
VIZIO VX371HDTV10A
The set tries to turn ON. No video, vertical lines, and no sound.  It shuts OFF after a short while.
Check the fuse at (+12) volt line on the main board. Replace the voltage regulator [FMPS1117] on the main board.
Cont:-

Thursday, June 28, 2012

PHILIPS 32PFL5332 - LED BLINKING CODES INORMATION


Cont:-

ERROR-14
Error-14:  (Audio supply)
This error is triggered in case of two low voltage of the audio supplies and therefore a drop of audio supply voltage of below approx: 9V per supply rail or lower than 18V rail to rail.  Also a DC voltage of higher than 1 VDC on speakers will lead to protection and error 14 blinking.  For LCD set, this circuit can be found on schematics SA3, for PDP set this can be found on schematic C.  It should be noted that for 26" models there is only a supply link between the amplifers and standby microcontroller, where as in all other models this link is implemented by audio port line- Pin7 on 1 Mo2


ERROR-18
Error-18 (MPIF-1)
Error-18 is displayed in SAM.  No protection.


ERROR-21
Error-21(HDMI) switch.  When this error occurs the TV will go to protection and the front LED will blink at 3Hz.


ERROR-29
Error-29[AVIP-1]
This error will probably generate extra errors.  Will probably also see errors 31(MPIF) and error-31(AVIP 2).  Error 29 and 31 will always be logged together due to the fact that both AVIPs are inside the PNX2015 and are on the same I2C bus.  In this case, start looking for cause around AVIP(Part ofPNX2015).


ERROR-31
[AVIP 2].


ERROR -34
Error-34 (Tuner-1)
When this error is logged, it is not sure that there is something wrong with the with the tuner itself.  It is also possible that there is something wrong with the communication between the channel decoder and tuner.  


ERROR-37
Error-37 [Channel Decoder]
This error will always log error 34 (tuner) extra.  This is due to the fact that the tuner I2C bus is coming from the channel decoder.


ERROR-44
Error-44 [NVM]
This error will never occur because it is masked by error-3(I2C bus 3).  The detection mechanism for error-3 checks on I2C acknowledge of the NVM.  If NVM gives no acknowledge, the standby software assumes that this bus is blocked, the tv goes to protection and error-3 will be blinking.


ERROR-53
Error-53 will indicate that the VIPER has started to function {by reading his boot script, if this would have failed, error-5 would blink} but initialization was never completed because of hardware peripheral problems.  (NAND flash,....) or software initilization problems.  Possible cause could be that there is no valid software loaded.  Try to upgrade to the latest main software version.  
*********************************************************************************



PHILIPS 32PFL5332: BLINKING ERROR CODES INFORMATION



ERROR -1
I2C bus 1 blocked.
TV will go to protection and the front LED will blink at 3Hz.  Now it can partially restart the TV via SDM shortcut pins on the SSB.  Depending on the software version it is possible that no further diagnose is possible.  With knowledge that only errors 1,2,4 and 63 result in a 3Hz blinking LED, the range of possible defects is limited.


ERROR -2
I2C bus 2 blocked.
  When this error occurs the TV will go to protection and the front LED will blink at 3Hz.  No can restart the the TV partially via the SDM shortcut pins on the SSB.  Due to hardware restriction [I2C bus 2 is the fast I2C bus]; it will be not possible to start up the VIPER and therefore, it is also impossible to read out error codes via ComPair or via blinking LED method.  With knowledge that only errors 1,2,4 and 63 result in a 3Hz blinking LED, the range of possible defects is limited.  When restarted the TV via the SDM shortcut pins and then pressed "CH+" on the remote control, the TV will go to protection again, and the front LED blink at 3Hz again.  This could be an indication that the problem is related to error-2.


ERROR-3
I2C bus 3 blocked.
There are only thre devices on I2C bus-3.  VIPER, Standby processor, and NVM.  Standby processor is the detection device of the error, so this will only occur if the VIPER or the NVM is blocking the Bus.  This error is also be logged when the NVM gives no acknowledge on the I2C bus.  Note that, if the 12V supply is missing [connector M46 on the SSB], the DC/DC supply on the SSB will not work.  Therefore, the VIPER will not get supplies and could block I2C bus-3.  So a missing 12V can also lead to an error-3. 


ERROR-4
I2C bus-4 blocked.
Error-4 is displayed in SAM.  No protection.


ERROR-5
Error-5 (Viper doesn't boot)
This error will point to a severe hardware problem around the VIPER [sypplies not OK, VIPER completely dead, I2C between VIPER  and standby processor broken etc:-.


ERROR-7
Error-7 (8-6V error)
Except a physical problem at the 8.6V itself, it is also possible that there is something wrong with the audio DC protection.  


ERROR-12
Error-12 (12V error)
Except a physical problem at the 12V itself, it is possible that there is something wrong with the audio DC protection.
Cont:-



Wednesday, June 27, 2012

PHILIPS 32PFL5332 _ SERVICE MODE & LED BLINKING CODES.



PHILIPS 32PFL 5332.


ENTERING THE [SDM] Service Default Mode.

  • Use the standard remote control transmitter and key in the code [062596], directly followed by the "Menu" button.  It is possible that together with the SDM, the main menu will appear.  To switch it Off, push the Menu button, once again.
  • Short the two solder pads on the SSB,  with the indication SDM for a moment.  These solder pads are located on the top of the SSB.  Activation can be performed in all modes, except when the set has the problem with the Standby processor.  
  • After activating this mode, SDM will appear at the upper right corner of the screen ; if you have picture. 
HOW TO NAVIGATE
  • When you press the Menu button on the remote control, the set will toggle between SDM and normal user menu, with SDM mode still active in the background.
  • To exit from SDM mode, 
  • Switch the set to Standby via remote transmitter.
  • Via a standard customer RC transmitter:  Key in "00" sequence.
BLINKING LED PROCEDURE

The blinking LED procedure can be split up into two situations.
  1. Blinking LED procedure in case of a protection detected by the standby processor.  In this case the error is automatically blinks.  Therefore you do not have to do anything special, just read out the blinks.  A long blink indicate the decimal digit, and a short one indicates the units.
  2. Blinking LED procedure in the "ON" state.  Via this procedure, you can make the contents of the error buffer visible via the front LED.  This is especially useful for fault finding, when there is no picture. 
When blinking LED procedure is activated in ON state, the front LED will show the contents of error buffer by blinks.  Error code >10 are shown as follows.
  1. "n" long blinks (where "n"= 1 to 9), indicating decimal digit,
  2. A pause of 1.5s,
  3. "n" short blinks (where n = 1 to 9),
  4. A pause of approx: 3s,
  5. When all error codes are displayed, the sequence finishes with a LED blink of 3s,
  6. And the sequence starts again.
Example: Error 12 9 6 0 0
After activation of SDM, the front LED will show:
  1. One  long blinks of 750ms (Which is an indication of the decimal digit), followed by a pause of 1.5s.
  2. Two short blinks of 250ms followed by a pause of 3s,
  3. Nine short blinks followed by a pause of 3s,
  4. Six short blinds followed by a pause of 3s,
  5. One long blink of 3s to finish the sequence,
  6. The sequence starts again.
HOW TO ACTIVATE THIS FUNCTION?
  • Activate SDM.  The blinking front LED will show the entire contents of error buffer (this works in normal operation mode).
  • Transmit the commands 'Mute"- "062500" - "OK" with normal remote control.  The complete error buffer is shown.  Take notice that it take some seconds before the blinking LED starts.  
  • Transmit the commands "Mute"-"06250x"-"Ok" with a normal remote control, where "x" is the number between 1 and 5.  When "x" =1; the last detected error is shown, "x" =2; the second last error etc:-  Take notice that it take some seconds before the LED starts blinking.



PANSONIC THP50G25 REPAIR HINTS



Fault:
Set power up, but shuts down after some seconds, 4 blinks of standby light at the front panel.
Y-Sustain board fault.  Transistor [MOSFET] shorted.  
Replace Y-Sustain board [TNPA 5081]

TNPA 5081:
PANEL DEFECTS;
  • Small vertical red line/s with picture on the left part. [replace panel]
  • Defective Driver IC on the plasma panel.[replace panel]

PANASONIC TH-42PZ77U POWER SUPPLY BOARD SUBSTITUTION


Power supply board to this model Plasma TV  are sometimes very difficult to get.  There is substitution power supply board for this model.
The original power supply model number is [ETX2MM681MF]
Substitution power sully mode number is [TNPA3911]

ETX2MM681MF: ORIGINAL FITTING:


 TNPA3911
Length of wires of connector P12, has to be increased in length. 
Holder screws need to be modified.
P9 connector need modification.
Voltages and control signal paths are same.

PANASONIC TH-50PZ85U [POWER SUPPLY FAULT-REPAIR HINTS]


FAULT

SET TURNS ON; BUT SHUTS DOWN WITHIN 4 SECONDS, AND STANDBY LIGHT BLINKS 10 TIMES.  


10 Blinks of Standby light to Panasonic Plasma indicates the power supply section circuit should be looked into.


      This set is fitted with a power supply board [ETX2MM704MG]  It is a common fault to these model power supplies, that, there will be missing voltages from it.  Even though a new baord can poise this problem.  Even though it will work perfectly, it will begin to show this problem again within a short period of time, say weeks or months.  If you are handy in electronc equipments' repair, it will be best to replace this board with [ETX2MM705NG] model poser board.  It is a different board, but connectors are exactly same to each other, and [706NG] is more powerful too. The board has same voltages, same connector confujuration and signal paths.  There is no need to adjust anything, and the board is cheaper than [704MG].


     704MG main power board and small stand by power supply removed and  706NG should be installed.  You must have sound knowledge in electronics, and must have enough experience in work with power supply boards.  Must have patience and concentration.  
The former said power supply board is bigger in size.  So there is a need to modify coupling holders to to fix the board in place.  See the pictures of both boards.


ETX2MM704MG
ETX2MM706NG
     It can be seated well by making holes, and fix one extra holder to aluminium casing of plasma panel. It fits perfect; and all the connectors are the same.  Some wires need to increase in length, as they might be short enough to reach the connecting sockets. 

An other fault that can occur to these models Plasma TVs are:


     TV will work well on HDMI input, while no other inputs or front panel buttons will work. This fault is due to missing software on its internal flash memory.  Bad tuner board can cause this problem.





Tuesday, June 26, 2012

PANASONIC 42" PLASMA TV REPAIR HINTS SERVICE EXPERIENCE



Fault:
TV will turn ON.  Will turn OFF as soon as the picture appears.  Repeats the same, whenever switch ON.

     Checked all the voltages from main power supply regulator board.  Set switched ON, after connecting digital multimeter, set to voltage range [Auto range], between (+15) Volt and ground. 

   Noted that, the (+15V) line drops its voltage, when the set receive picture, goes very low, into protection mode.  Checked all the related components.  Concentrated on audio output stage circuit.  Disconnected the speakers by unplugging the speaker wire from the socket.  

     Without speaker, the set began to work fine.  Checked the speakers.  One among the speakers' voice coil was shorted to its metal body [internally, not repairable]; where as, metal body of the speaker is grounded.  A direct short occured to (+15V) to ground, and this short circuit energised the short circuit protection, and it has been happening.  Replaced the speaker, rectified the problem.  This kind of problem is very rare.  This was for the first time I experience this type of fault, since 40 years of my service work.  Learned a good lesson indeed. 

PLASMA TV [FAULT FINDING AND REPAIR - 5]



Other faults due to damaged Buffer board are:
  • Turns ON, and shut down, No audio or video, Vertical black bars on the screen, Vertical color line size changes, Burning smell,  White or colored horizontal lines etc:
  1. Grey colored screen with no video, and the set refuse to turn OFF.  Have to unplug the set from AC mains to turn it OFF.
  2. No Menu or screen shots. Switches OFF for no reason.
  3. No video from any one of the inputs.
  4. No picture to some channels.  Only snow is visible.
  5. No picture, but menu window OK.
  6. Picture distorts after a while, and sound too seems troubled. 
The above stated are the symptoms of faulty Audio/Video Main Board.
This is the picture of a typical audio/video main board.
See its location.  The location may differ set to set, and model to model.   
Plasma Panel Faults:
  • Dark or Burned image on screen.
  • Previous screens' static image stays for a while, and goes out after some time.
  • Intermittent color change along with brightness.
  • Burn in image.
  • Turn ON and Shuts Down.  This may repeat.

PLASMA TV [FAULT FINDING AND REPAIR-4]


LOGIC CONTROL BOARD FAULTS.


  • No video, but sound is OK.
  • Part of the screen blank.
  • Left part of the screen is blank.
  • Vertical and Horizontal lines on the screen.
  •  All Functions not working.
  • Some functions are not working
These are common fault resulted by a damaged logic control or its buffer board.

This is the picture of Logic control board to LG plasma TV.
This is the picture of Samsung Plasma TV logic control board.

Pictures of buffer boards.
As you can see here, these boards will difffer to each other to set by set, and model to modes. You have to locate this board.  Must have knoledge in electronics to do all these works.  Components can be bought either from local electronic spare part maket, or from the authorised service centers. You can get information about the availability of components by internet too. Details about availability, price etc;- can be gathered by click open advertisements too.
Cont: 

PLASMA TVs [FAULT FINDING AND REPAIR -3]



PLASMA TV REPAIR -3


Possible Faults

  • Flashing pixels on screen.
  • Have audio but no video.
  • Vertical color lines on screen.
  • Vertical Bars on screen.
  • Vertical color lines along with video.
  • Picture goes Red predominant after a while.
  • Horizontal lines on image.
  • Dark image.
  • TV turns ON, and shut down.
  • Negative image.
  • Screen goes black, and come on with picture.
     All the above faults are related to either X,Y or Z sustain boards. These boards look different to models to models, and manufacturer.

This is the picture of X- Sustain board of Daewoo Plasma TV.
This is an other X-Sustain Board.

     Y-Sustain board the likely to be more faulty, than others.  There are buffer boards to this Y-Sustain board.  If Y-sustain board found faulty, it is a best practice to replace these buffer boards along with it, because, damage to Y-Sustain board might damage these boards too.  There are two buffer boards.  Replace these two boards along with Y-sustain.  There is no way to check these boards by normal methods.  If one among the board is faulty, it will effect the replaced Y-Sustain. 
Like X-Sustain board, Y-Sustain also differ in size, structure to models to models.

See the picture of Y-Sustain of a 50" Plasma.


This is the picture of an other Y-Sustain board.
 This is the picture of the buffer boards to Y-Sustain. One is used as Upper buffer, and the other is Lower
In this picture you can see the location of these boards.
This is the picture of Z-sustain board.
Here the picture of Z-Sustain board to LG 50" Plasma.
Cont:

PLASMA TVs FAULT FINDING AND REPAIR -2



PLASMA TV REPAIR -2

POWER SUPPLY REGULATOR BOARD FAULTS.

Main symptoms are:

  • Flashing Pixels on the screen.
  • Turn ON, but no Video & Sound.
  • No Power.
  • No power light on front panel.
  • Hard to turn ON.
  • Turn ON after a long period of time. Sometimes takes 30 minutes or so.
  • Turn ON, but turns OFF automatically.
These faults are related to the Main Power Regulator board.

     See the picture of power supply regulator board to Pioneer Plasma TV. The type may differ model to model.

     Usually, power regulator board can be located at the center portion of the panel.  See its location.
     Here you can locate it at the center part of the plasma panel.  Power supply boards are very difficult to repair, because, most of the components used will be very difficult to get from open electronic spare part market.  Sometimes, the cost of component and service charge may go up to a new once's cost.  It will be best to replace it as card basis.  It might cost between $40 to $60.  Can bought either electronics spare part shops, locally, or from the authorised service center for the TV. 
Cont:

Monday, June 25, 2012

PLASMA TVs FAULT FINDING AND REPAIR -1


PLASMA TVs - 1

How these Plasma TV screen works? 

     The idea of plasma display is to illuminate a colored gas, like Neon or Xenon.  You see on the screen is these burning gases between two pieces of glass.  The screen has a complex structure, has millions of pixels, and each pixel is powered by tiny electrodes and has its own gas and color.  The Plasma TV problems, starts with its screen itself.  If plasma screen is broken, there is no repair other than replacement.  It has a protection screen in front of it.  If the protection screen has broken, can be replaced, and won't cost more.  But with actual plasma screen, the things are different.  It will cost nearly to the cost of a new TV, including service charges.  Plasma screen consists of two pieces of glass with gas in between them, as stated above.  The gas is not re-chargable. These gas pixels are controlled by small electrodes.  Each pixel contain three colored sub-pixels  (Red, Green and Blue).  Plasma screen works in two steps.  Gas Ignition, and Picture development.  

  • The ignition is controlled by Power supply, Logic control, X Sustain or Z Sustain boards and Screen.
  • Picture is developed by Power Supply, Video control or scaler board, Logic control board, X Sustain board, Y Sustain board, Buffer boards and Screen.
Common problems seen with Plasma TVs are, Flashing Dots or Pixels, when the screen is cold.  This is the symptom of bad screen.
Colors are distorted to some parts of the screen. Again bad screen.
Vertical lines on picture.
Flashing red dots on some part of the screen.

     Screen problems will be difficult to rectify.  Not difficult, it is not possible. But panel problems can be rectified.  Plasma TVs are very sensitve to AC input voltage.  Make sure that the plug you connected the Plasma TV with wall socket have no sparks or loose contacts.  Proper cooling system should be installed, if company did not provided it.  do not leave the TV on only one channel for a long time.  Change channels occationaly  The power to plasma should be isolated.  That is, no other load should be taken from the same line to which plasma TV is loaded.  Unlike CRT based TVS, plasma TVs do not effected by external magnetic fields. 
Cont:






HOW TO REPLACE FAULTY T- CON BOARD

Part-2

     Normally T'Con board can be located fitted with LCD panel, either horizontally or vertically.  In most sets, it will be shielded withe a metal case, screwed upon it, which acts as an electrostatic shield, as well as a heatsink to main processor IC.  Upon unscrewing out the metal shield, the T'Con board is exposed, secured by screwing it on to the chassis.
  See the normal position to a T'Con board:


     After locating the T'Con board, carefully check it for any capacitor fault or any on board surace mounted fuse blown up.  Refer the schematic diagram of the Tv under service for details.  If found any, replace them and try once more by connecting it.  Be careful when unplugging the flat cable connections to this board.  Look for any lock, if any, at the side of each connecting sockets.  If there is such locks, pull out the strip wires only after releasing them.  See a typical connection.

     Be very patient, and concentrate only to work you are doing.  Never handle board or wire with careless.  As you can see, no ICs on it can be replaced by normal soldering techniques.  The board  has been manufactured by automatic PPS; [Pick Place and Solder], machines controlled by computer and robotic hands.   Before unscrew the board out from chassis, just unplug all the flat cable connections, and reinsert them as it was.  Check once more by switch ON the set, after all connection has been done properly.  Keep all the wire dressings same as before. If you have damaged any strip wires that connected with, not use it any more.  Buy new ones' of same connection numbers and diamensions.  These flat cables can be bought from most of the electronic spare part selling shops.  

     In rare cases, there might be some alignment be done after this board replacement.  To do it, you have to enter the service mode option to your set.  If you are not sound in electronics, seek tech support.  Never enter to service mode option, and change data values there, without proper knowledge.  it might make the set irresponsive to any further commands.

HOW TO REPLACE A FAULTY T'CON BOARD TO LCD TELEVISIONS


Part -1
     What is T'Con board.  This is the board that controls the pixels in an LCD television.  It is connected between main digital board, and LCD panel.  Fault to this board is a common problem to all brands of lCD TVs.  
     For a Sony KDL52XBR5, if its stand by light blinks 5 times, then a pause, again blinks 5 imes, means T'Con error.  The T'Con board is attached to the LCD panel and is included with a  new LCD panel along with the inverter board.  The first check to do is, check the connections of flat cables to them. See the picture of some of flat cables connected to T'Con board.

     How to make sure that the T'Con board is faulty.  So many strange screens will be displayed, if T'Con board is faulty.  Here are pictures of some of them. 
In most cases TV may show other symptoms too. If T'Con boards' processor IC gets direct shorted, it will apply a more load to TVs power supply section, and in some sets the technician might go before it. Check all the connections to both end of each ribbon cable connected to this board.  Normally, these boards are not repairable, except for some capacitors or SMD type fuses can.  How a T'Con board look like.  This is the picture of a typical T'Con board.  The shape and appearance to this board may differ to different TVs.



For Sony KDL32BX300, six blinks, pause, six blinks indicates a back light error and location is on the LCD panel. Not with T'Con board. The LCD panel includes the "Inverter MT board" and T'Con control MT board.    So different brands of televisions will show different blinking codes.  The technician must fully aware of these blinking codes. 
 Contd:

Sunday, June 24, 2012

SONY WEGA FLAT CRT TVs SIX OR SEVEN BLINKS OF STANDBY LIGHT REPAIR HINTS



      This TV has excellent quality and no restrictions in viewing angles.  Other than its size and weight it is much better than what is available with newer technologies at this time.

     The most common fault to these TVs are, blinking standby light.  Among them, most common are six of seven time blinks, and either goes to standby, or OFF.  There is a common solution for this problem too.  If IC 8002 or IC6501 on the D board is found faulty in most cases.  Either only one among them might be faulty, but it is a good practice to replace both of them at the same time.  IC number is [MCZ 3001DB].  How to access this part.  you have to open the back cover of the TV.  You must have knowledge in electronics. 

     It is possible to remote the entire back shell of the TV, by removing all of its screws, and sliding it off.  There are a lot of screws, about a dozen of them which holds the back cover in place.  Removing the back cover allows access D board.  
Before removing the cover, just unplug the TV from AC mains wall socket, and allow a few hours to the high voltages to dissipate so as to avoid shock hazards.

     Some of the connectors are easy to remove, but three high voltage wires connected to CRT is not easy to unplug connections, and they should not be unplugged at all.  
There are a number of connectors, need to be flip upwards, to disconnect the D board from an other adjacent board.  If pull them upward, they will unsnap and pivot up 90  degrees.  Unplug all the other cables and remove eight screws.  The board will come out far enough to rotate it into position.  Such is the mechanical fittings arranged by Sony, to do service work to this board.  You must have a stubby screw driver to remove one screw that is far forward and hidden between two connectors, and it comes just under the picture tube.  Locate the ICs here on D board.  IC 8002&IC6501.  Desolder them out from the circuit baord.  Use a desoldering pump to suck out solder from soler terminals.

     Beware that each chip has two pins are not soldered to board, and keep them like it is.  Take note of the orientation of the chips.  There is a notch on one end facing the closest edge of the board.  Never install the chip backwords.  If you use sockets in case, you ever to do this repair again, since having to unsolder these chips is most of the work.

     After replacing ICs with sockets, install the replacement ICs.  Only one among these chips might be bad, but it is best to replace both at the same time.  It might be necessary to squeeze the pins together to get the legs aligned with the holes in the socket.  This style of ICs has its leges spread out by default, and so they might not automatically align unless you pre-bend them inward a little to align the the holes in the socket.  Carefully examine the chips after installation, make sure that the legs made it into socket.  After re-installing the D board and attaching all the cables, it would be a good practice to test it to make sure the repair worked, before reinstalling the cover. 

EMERSON TV - HOW TO PROGRAM DISH NETWORK



How to program dish network with Emerson TV


  • Press and Hold the desired Mode button [TV,VCR,SAT AUX] etc:-, for more than 3 seconds, until all Mode LEDs will stay lighted, and release the Mode button.  [After start to synchronize, at any time if a button is not pressed within 20 seconds, the remote will reset itself, and you have to start from first.  So, do not take more than 20 seconds between each press of an other button]
  • Enter the three digit code for your device.  The light will blink for each press of code button, and stay lighted.
  • Press # button.  If the entered code is valid, the respective Mode light will flash three times.
  • To verify if the code entered is correct, try several other functions to the equipment.
  • If the remote have only one button at the top, press the Mode button, until the button light stay lit.
  • Using the tip of a ball point pen, press the Address button.
  • Enter the code.
  • Press the Address button.  If the entered code is valid, the mode light will flash three times.
  • To verify, try several other function to the device. Some codes may work for partial functions or respond differently.  That is, if vol+  on the remote is pressed Channel down the function, and so on. In this case, try an other code.  Choose one code, which have maximum functionality. 
[Dish Network Codes for Emerson Brand TV are]  

632_544_541_526_537_533_528_527_534_535_536_ 538_539_540_695_692_691_622_573_695_696_720_699




PHILIPS 50PFP 5332/37 - NO START. BLINKING LIGTS AT THE FRONT PANEL



     The set switches ON, but no screen. No sound. Blue light is in ON mode, is blinking 5 times, a short pause and then starts blinking again. After this short pause, the light may blink three of four times in rapid succession.

     The fault might be either to its main power regulator board, or Y sustain board. To make sure which section has the fault, disconnect the Y Sustain power supply connection and turn on the set.  If the unit stays ON with no red light, then the Y-Sustain board is faulty.  

     To locate Y Sustain board, open the back cover of the TV.  Looking from the back of the TV, Y-Sustain board can be located at its left side, and the main Power Regulator board at the center.

     Even if the unit behaves the same, with blinking light, make sure that the main power regulator board has the fault.  It will be best to replace this board as card basis, especially to plasma TVs, rather than making 'surgery' to it.

SONY LCD TV BLINKING CODES


     With all TV sets manufactured after 1993, Sony has included a self  fault detection circuit, which will detect fatal faults to the internal circuit.  These fault indications will be shown as series of blinking of standby light at TVs front panel.

     Normally, when the set is switched ON, the standby light at its front panel will blink once and will go OFF after the set has began to work normally.  If any fault is detected when the set is switched ON, the standby light will begin to blink.  The number of blinks it gives is an important information about the internal faulty section.

     So the number of blink at one time, must be counted.  You have to count this number once again after switch the set ON by its main power ON/OFF switch at its front panel, and confirm that the number of blinks occur is correct.

BLINKING CODES

[00] Blink => No error Detected.  The set is OK.
[01] Blink => Is reserved for future use. 
[02] Blinks => OCP (Over current Protection).  Some component/s shorted, consuming more current from power supply section, than specified.

]03] Blinks => OVP (Over voltage Protection).  The voltage output from the main power regulator section is more than specified.

[04] Blinks => No Vertical Sync:
[05] Blinks => Power ON IRK error.
[06] Blinks => II2 bus-clock or data lines should be checked for short circuit or low voltage.
[7] Blinks => NVM (No IIc bus acknowledge at power ON.
[8] Blinks => Horizontal Protection.
[9] Blinks => No tuner acknowledge.  Tuner section circuit should be troubleshooted.
[10] Blinks => Sound Processing section has the fault.
[11] Blinks => Is reserved for future use.
[12] Blinks => Scan-Rate error. 
[13] Blinks => DAC [Digital to Analogue converter] error.  Main board should be troubleshooted.
[14] Blinks  => Back End error.
[15] Blinks  => Dynamic Convergence Error.
[16] Blinks => PIP (Picture In Picture section circuit's fault.



Saturday, June 23, 2012

HOW TO ENTER SERVICE MODE TO AKAI 29CT24FS _ 29CT71FS TVS



TO ENTER THE SERVICE MODE

  • Set the "Volume" to (0), by the remote control.  Press and Hold the "Mute" button on the remote control, and the "Menu" button on the front panel of the TV, for more than 2 seconds. The service mode screen, with display "S" in Red and other items in yellow  color will be displayed.
  • Use Up/Dn buttons on the remote control to select an item to adjust, and change the data value to selected items, using  Right arrow/Left arrow buttons on the remote control.
  • The POS+/-, Up, Dn, Right,Left, digits 1 to 6, Recall, Vol+/-, and Power buttons on the remote control functions in Service Mode, but 100+,7,8,9 and 0 buttons not.
  • To exit from Service Menu Mode, switch OFF the set, by its front panel Power Switch.

HOW TO ADJUST AOC-LT 2722 'NORCENT' LCD TV SERVICE MODE PARENTAL LOCK and UNLOCK PROCEDURE




DID FORGET PASSWORD? 

Chang the password; default password is; [1111], follow the instructions on screen.  If you have forgotten your password, do the following.

  • "POWER OFF => MENU => V-CHIP => MUTE" to revert the default password to (1111)
SERVICE MODE
There are two types of service mode to this set.

Engineer Mode & Factory Mode

Engineer Mode:
  • Press number key [100 => 9 => 9 => 1] to enter into Engineer Mode.
  • Press "Menu" key repeat to ADC page, and select "EPrint" and press 'Right' key to initial EEPROM.
  • Press number key [100 => 9 => 9 => 9] and enter into Factory Mode.
How to setting MEM channel, you can reference to Chroma-7120 user guide, or simple use"SC" key and "Next" key to modify x,y,Y value and use "ID" key to modify the TEXT description.

Following is the procedure to do white-balance adjustment.
  1. ADC Adjustment => [AL = Auto Level Adjustment, ALY = Auto Level Adjustment for YUV mode. RG,BG,GG => R,G,B gain adjustment.  RB,GB,BB = R,G,B Bias adjustment.]
  2. SCALER adjustment. [CO,BR => Contrast and Brightness adjustment.  RG,GG,BG => R,G,B gain adjustment.  RB,GB,BB => R,G,B Bias adjustment.  S9,S6,ST,SH => Save 9300,6500.  TV/AV/S-VIDEO/480i, Component 480P  color temperature.  R9,R6,RT,RH => Recall 9300, 6500, TV/AV/S-VIDEO/480i, Component 480P color temperature.  VC => Set Close Caption ON/OFF. VC => Set V-Chip ON/OFF. WH => Set Wireless Headphone ON/OFF.  PP => Set PIP ON/OFF.  BI => Setup Burn-In mode ON/OFF.  ISP => Set ISP ON/OFF.  SR PP => Set SRS On/OFF.  EX => EXIT MORE function to Factory Mode menu.
GAIN ADJUSTMENT

  • ADJUST 9300 COLOR TEMPERATURE
  1. Switch the chroma -7120 to RGB mode, by pressing "Mode" button.
  2. Switch the MEM. Channel to Channel 01, with Up or Dn arrow on chroma-7120.
  3. The LCD indicator on chroma-7120 will show [x=283, y=297, Y>380]
  4. Change the "Source" input to PC.
  5. Select "AL" and press "Right" arrow to do the Auto Level.
  6. Adjust the 'GG' up to G value at chroma-7120 is 100.
  7. Repeat the item 4 & 5 to make R,G,B value are the same.
  8. Select Cursor to "S9" and press "Right" arrow to save the value.
Turn Power Button OFF to quit from Factory Mode.
  • Auto Level of PC should be adjusted with TIMG 127, PATN 42or 16 GRAYS screen.
  • It should be under White Picture while adjusting the color temperature  of all display modes.
ADJUST 6500 COLOR TEMPERATURE
  1. Switch the Choroma-7120 to RGB mode, by pressing "Mode" button.
  2. Switch the MEM.  Channel to Chanel 02, with Up or Dn arrow on chorma-7120
  3. The LED indicator on chroma-7120 will show [x=313, y=329, Y>380].
  4. Change the source input to PC.
  5. Select "AL" and press 'right' arrow to do auto-level.
  6. Adjust GG up to G value at chroma-7120 is 100.
  7. Adjsut BG and RG till the value of R and B value on chroma-7120 are 100+/-5
  8. Repeat the item 4 and 5 to make the R,G,B value are the same.
  9. Select Cursor to "S6" and press 'right' arrow to save the value.
ADJUST VIDEO COLOR TEMPERATURE
  1. Switch the chorma-7120 toRGB mode, by pressing "Mode" nutton.
  2. Switch the MEM.  Channel to Channel 3, with Up or Dn arrow on chroma-7120.
  3. The LCD indicator on chroma-7120 will show [x=283,y=297, Y>450].
  4. Change 'source input' to [AV-1].
  5. Adjust GG up to G value at chroma-7120 not going up; set the g value is max.
  6. Adjust BG and RG till the value of R and B value on chroma-7120 same as G value.
  7. Repeat the item 4 and 5 to make the R,G,B value to same.
  8. Select cursor to "ST" and press 'right' arrow to save the value. 


Friday, June 22, 2012

HOW TO ENTER SERVICE MODE TO AKIRA - CT-21DR9A 21DR9CP 21DR9R


TO ENTER AND LEAVE SERVICE MODE
  1. Enter factory password.  Use customer remote control handset. 
  2. Set the TV as RF condition and press remote control "Prog" key and follow by '6' '4' '8' '3'
  3. Repeat the same step, to enter White Balance Adjustment.
  4. Repeat the same step, to enter into "Factory Mode"adjustment condition.
  5. Repeat the same step to enter into 'Factory Mode Setting" condition.
  6. Repeat the same step to 'Leave" the Factory Mode function.
     Use factory mode remote control unit, press the "Factory" key to enter into Factory Mode function.  Press one more time "Factory" key to enter "White Balance" adjustment condition, press one more time to enter the adjustment condition.  Press one more "Factory" key to setting up requirement spec: Last press once "Factory" key to leave factory mode function.
     Use "Factory Mode" for TV aging, second step to align the White Balance in good condition.  Third step adjust the required electrical specifications.  The function adjustments have 20 selections.  Other function of adjustments are 39 items, and can use [P+/P-] key and [V+/V-] key for selection and adjustment.
SETTING OF COMPANY LOGO
  • Switch ON the TV set, and set the TV in [AV] mode.  Press control "Disp" key and the TV screen will display 'AV" and follow by presetting the numeric key ['6' '4' '8' '3'] to enter the company logo setting.
  • Press [P+/P-] for selection of function, and press [V+/V-] key for adjustment.  Press [>*<] key to change or selct your requirement. 
  • Logo setting 1st row that come with 4 kinds of settings.
  • Logo setting 2nd row that come with 2 kinds of settings. 1st turn OFF the display, second turn ON the display.  {Display the word setting of maximum 10 words}.
  • When the 2 rows of words are display on screen, can check the word positioning.  Not too close to each other or the words are not clear to display on the screen.  Re-set the logo words from the logo setting factory mode. 

HOW TO ENTER SERVICE MODE TO PHILIPS - 19MDTR 20 -17 and 27DVCR 55



TO ENTER SERVICE MODE

  1. Turn the Power ON, by its front panel Power Switch.
  2. Enter TV mode, and press "Ch Up" or "Ch Dn" button on TV unit, and press "Disc Menu" button on the remote control.  Version of the microcomputer will be displayed.
DC [114V] ADJUSTMENT.
  • Connect the unit to AC power outlet.
  • Connect DC volt meter to  J553(+B), and heat sink on HV CBA or to Ground.
  • Adjust (VR2601) so that, the voltage of J553, becomes 114V+/-0.5V.
HOW TO MAKE A SERVICE REMOTE CONTROL UNIT
  • Prepare remote control unit [ID No.NE206UD; part number [4835 218 37345].  remove four screws from the back side.
  • Cut Off pin number (10) of the remote control processor, and short circuit pins [10 & 17] of the microprocessor with a jumper wire.
VERTICAL SHIFT ADJUSTMENT.
  1. Enter the service mode.  Press (9) button on the service remote control unit and select [V-P] mode.  
  2. Input a monoscope pattern.
  3. Press Ch Up or Ch Dn buttons on the service remote control so that, the top and bottom of the monoscope pattern are equal to each other.
HORIZONTAL SHIFT ADJUSTMENT
  • Enter the service mode.
  • Press "8" button on the service remote cotnrol, and select the ]H-P] mode.
  • Input a monoscope pattern.
  • Press Ch Up or Ch Dn buttons on the remote control so that the left and right side of the monoscope pattern are equal to each other.
  • Turn the Power OFF and ON again.
HEAD SWITCHING POINT ADJUSTMENT
  • If this adjustment have misaligned, cause head switching noise or vertical jitter in the picture. 

  1. Play back Test Tape [VFMS 0001H6]
  2. Enter service mode; and press "5" button on the service remote control.
  3. The head switching position will displayed on the screen.  If adjustment is necessary: press CH UP or Ch DN buttons on the remote control.  The value will be changed in 0.5H steps Up or Dn.  Adjustable range is up to [9.5H].  If the value is beyond the adjustable range, the display will change as [Lower output of range: 0.0H, Upper out of range: -.-H]
  4. Turn power OFF again

Thursday, June 21, 2012

HOW TO ENTER SERVICE MENU TO BUSH MAXIM - 32" MONITOR STYLE TFT LCD TV



There is no Hardware Alignments present in these sets.


SOFTWARE ALIGNMENTS


SERVICE MENU


     The service menu enables large number of settings.  You can activate or deactivate options, or change parameters that influence the quality of the displayed image.  To activate the service menu; 

  • Press the "Menu" button on the remote control.  The screen will display Customer Menu.
  • Press (1,9,2,3) on the remote control.  The screen will now display top level of Service Menu.
  1. General Setup.
  2. Video Setup.
  3. Audio Setup.
  4. Scaler Setup.
  5. Options Setup.
  6. Display Setup.
  7. More
     Every item in the Service Menu top level gives you access to a sub level, that will contain several items.  Navigate with Cursor Buttons on the remote control, increase a value using  ">" or decrease a value using "<".


















HOW TO ENTER SERVICE MODE TO - JVC AV27D302_AV 27D202


              TO ENTER SERVICE MENU MODE


     Press "Sleep Timer" key and, while the indication of 'Sleep-Timer (0) Min, is being displayed, press "Display" key and "Video Status" key on the remote control unit simultaneously to enter the Service Menu.  


The Service Menu Screen Selection



  • Press Up/Dn keys to select any of the following items
  1. PICTURE
  2. THEATER
  3. LOW LIGHT
  4. RF AGC CHK
  5. SOUND
  6. HILIGHT
Enter the Adjustment Mode
  • If select any of picture or sound items, and the Left/Right key is pressed from the Service Menu, an other screen will be displayed.
  • Then Up/Dn key is pressed, the Picture Mode Screen or the Sound Mode Screen is displayed, and the Picture of Sound setting can be performed. 
Theater, Low Light, high Light, RC AFC CHK Mode.
  • If select any of the above said items, and Left/Right key is pressed from the Service Menu, respective screens will be displayed, and settings or verifications can be performed.

HOW TO ENTER SERVICE MODE TO JVCAV 32X25EU 28X25EU 32H20EU 28H20EU



Before starting service menu adjustments:


  • There are two ways to adjust these TV sets.  One is with the remote control unit, and the other is the conventional method using a adjustment part and components.
  • The setting used the remote control unit is made on the basis of the initial setting values.  The setting values, which adjust the screen to optimum condition can be different from the initial setting values.
  • Make sure that the connection is correctly made to AC power source. 
  • Turn ON the power of the TV and measuring instrument for warming up, at least 30 minutes before starting adjustments.
  • If the receive or input signal is not specified, use the most appropriate signal for adjustment.
  • Never touch parts, such as variable resistors, transformers and condensers, not shown in the adjustment item.
  • Unless otherwise specified in the adjustment items, preset the following functions with the remote control unit.
SLEEP TIMER => OFF
TONE BALANCE => CENTER
ZOOM => FULL

TO ENTER SERVICE MENU
  • Press the 'Information" key and "Muting" key of the remote control handset simultaneously.  The service menu screen will appear. 
SELECTION OF SUB-MENU SCREEN
  • Press one of keys 1 to 5 of the remote control and select the sub menu screens.
SERVICE MENU ITEMS
  1. IF => This mode adjusts the setting values of the IF circuit.
  2. V/C => This mode adjusts the setting values of Video/Chroma ciruit.
  3. Audio => This mode adjusts the setting values of the multiplicty sound circuit.
  4. DEF => This mode adjusts the setting values of the deflection circuit for each aspect mode given below
FULL => [100/120Hzi]
PANORAMIC => [100/120Hzi]
SUBTITLE => [100/120Hzi]
COMPRESS => 100/120Hzi] (This value is fixed)
     5.  VSM Preset => This mode adjusts the initial setting values of Cool, Normal and Warm. [VSM = Video Status Memory].