Wednesday, November 30, 2016

Sony KLV-26S400A LED blinking codes Error code details – Service mode – reset and more - KLV-32S400A KLV-37S400A

KLV-26S400A RM-GA011 
E, EA, India, ME, New Zealand, Philippines, Saudi Arabia, South Africa, Thailand, Vietnam.
KLV-32S400A RM-GA011 
E, EA, India, Iran, ME, New Zealand, Philippines, Saudi Arabia, South Africa, Thailand, Vietnam.
KLV-32S400A/H RM-GA011 
India, ME (Gun-Metallic Silver), Philippines, South Africa, Thailand.
KLV-32S400A/S RM-GA011 (Silver)
E, Saudi Arabia.
KLV-37S400A RM-GA011 
E, EA, India, Iran, ME, New Zealand, Philippines, Saudi Arabia, South Africa, Thailand, Vietnam
SELF DIAGNOSTIC FUNCTION
LED Pattern:
When safety shutdown occurs, Standby LED display reports the cause by using the lightning patterns as indicated below.



Example:  The figure shows LED display when SHUTDOWN is caused by DC_ALERT 2. It repeats flashing for a specified number of times in 0.3sec/cycle and has a 2 seconds interval of lighting off.  Please note that a 2 seconds interval of lighting off is fixed regardless of abnormal state types.
Standby LED Error Display
Perform below countermeasures according to Standby LED blinking times.
SERVICE ADJUSTMENTS
While TV set on standby, press the following sequence on the remote commander (RM-GA011)
The following menu will appear on the screen:
To reset, select ‘RESET’ using remote commander and press (+).
To quit the diagnostic menu, turn off and on the TV set.
Aging
Aging setting: Set no signal and monitor as aging mode.
Aging condition:  Aging condition before white balance adjustment is as follows:
Supply voltage : Rating
Time : 20 minutes or over (AGING TIMER register setting)
Ambient Temp : 22 ~ 28 degree
Brightness : Brightness is set by aging mode.
Input : Set no signal except digital and analog RF (video/component/PC).
LED lightning pattern during aging:
In case the AGING TIMER > 0
Green (0.5s) > Off (0.5s) > Green (0.5s) > Off (0.5s)
Note: Green (Power LED is ON / OFF)
In case the AGING TIMER = 0
Green (3s) >Off (3s) > Green (3s) > Off (3s)
Note: Green (Power LED is ON / OFF)
Note: If set has been put on surface down, static electricity causes brightness surface irregularity. If such happens, turn the set over or place it in upright position for more than 30 seconds. Once surface irregularity is cleared, check the set.
Accessing Service Menu
 While TV set on standby, press the following sequence on the remote commander (RM-GA011)
The following menu will appear on the screen:
View Menu Listing
Press the 'down' arrow button to choose white balance (W/B) and then press 'right' arrow button to view W/B adjustment items.
Select Menu Item
Press the 'up' or 'down' arrow button to select the item you want to adjust.
Increase/Decrease Data Value To increase the data value, press the 'right' arrow button whereas to decrease, press the 'left' arrow button.
Save/Cancel Data Value
To save the data value changes, firstly press the 'down' arrow button to select 'COLOR SAVE' then use 'right' arrow button to select 'OK' and press the (+) button. To cancel the data value changes, use 'down' arrow button to select 'Cancel' and press the (+) button.
Resetting the User Menu - Factory Reset
Note: The TEST RESET option resets all the customer adjustable data back to factory defaults.
While TV set on standby, press the following sequence on the remote commander (RM-GA011).
The following menu will appear on the screen:
View Menu Listing
Press the 'down' arrow button to choose white balance (W/B) and then press 'right' arrow button to view W/B adjustment items.
Now return to Service Menu
Press 'down' arrow button and select 'Service'. Then press 'right' arrow button to display 'Service' category items. The below menu is displayed:
Press the 'Enter' button to select 'TEST RESET' option.
Press 'up' arrow button to select OK and 'Enter' button to confirm.
White Balance Adjustment
Note: The white balance need to be adjusted when BG1 board and Panel is replaced.
Put TV to Video 1 and step gray scale using signal generator.
Press 'MENU' on the remote commander to display user menu.
Select 'Setting' by pressing the 'down' arrow button.
While in 'Setting', press 'right' arrow button to display setting options.
While in Picture Menu:
Select 'Picture Mode' and press 'right' arrow button to display picture mode options then select 'STANDARD' and press (+) button.
Next select 'Color Temperature' and press 'right' arrow button to select the option 'COOL' and press (+).
Now select 'Advanced Setting' and using the arrow keys, set all the registers in the Advanced Setting menu OFF'.
Put the set in standby mode. (Power OFF).
Access the service menu
Press the 'down' arrow button to choose white balance (W/B) and then press 'right' arrow button to view W/B adjustment items.
Using 10 step NTSC Gray scale with setup, adjust the white balance of the 60% shade with R_Drive and B_Drive.
Using the same pattern, adjust the white balance 20% with R_BKG and B_BKG.
20 IRE and 60 IRE shades should have the same color.
Board & Panel Replacement
When replacing the BG1 board and Panel, make sure to readjust the W/B.

LG CM8450 Troubleshooting and Circuit diagram Mini Hi-Fi System

Used ICs: PS9860, CS5346-CQZR, PCM1808, IRD2092 x 5 (Amp-IC), MLC3730S, M9812G, R5F100GEAFB, BU9546KV, AM5890, TPS54331D, 2RA20112ASP, STR2A153D - LG CM8450 (CM8450, CMS8450F/W) MINI HI-FI SYSTEM
Troubleshooting
NO POWER
If the unit doesn’t work by no power problem, repair the set according to the following guide.
FUSE/ BRIDGE DIODE/ THERMISTOR
Solution
Please check and replace F901, BD901, TH900, TH901 on SMPS board.
How to troubleshoot (Countermeasure)
1) Check if the fuse F901 is open or short-circuit.
2) Check if the bridge diode BD901 is short-circuit by over current with a digital multimeter.
3) Check if the NTC thermistor TH900~TH902 is normal or open.
NO AMP POWER
If the unit doesn’t work by no ±PVDD problem, repair the set according to the following guide.
FUSE/ FET
Solution
Please check and replace F911, Q905~Q906 on SMPS board.
 How to troubleshoot (Countermeasure)
1) Check if the fuse F911 is open or short-circuit.
2) Check the Drain-Source or Drain-Gate, Gate-Source Resistance of Q905~Q906 with a digital multimeter.
  If it is short condition, it’s destroyed. Replace it with a new one.  (Please replace 2 FET at the same time although several FET is OK).
SMPS circuit diagram [Click on the pictures to magnify]
NO BOOTING WHEN POWER ON THE SET
The set doesn’t work when presses the power button on the FRONT_CTRL board or the remote control.
How to troubleshoot (Countermeasure)
1) Check the 5.6 VA (CN106) and DVCC_3.3 V (IC505) in standby mode.
  If there is no 5.6 VA, check the SMPS and if doesn’t appear 3.3 V, check IC505.
2) Check 5.6 VA, +12 V, FL+, FL-, an +39 V when power on the set.
  If the set doesn’t work regardless of what the KEY2 changes high to low
while pressing the power button. X500 and X501 work normally but, if you cannot power on the set, replace the IC501 with a new one on the MAIN board.
VFD IS NOT DISPLAYED WHEN POWER ON THE SET
When power on the set, any icons or characters on VFD are not displayed.
How to troubleshoot (Countermeasure)
1) Check if 39 V, FL+ and FL- are output from SMPS to VFD via the MAIN board.
2) Check if the IC501 outputs VFD_RST, VFD_CLK, VFD_DO, and VFD_STB to the FRONT board.
3) Check if the VFD grid current amplifier circuit on the FRONT board.
Check the drive signal to the transistor’s base.
  If the control signals from VFD (DGND_2, VH, VDD) isn’t output, replace VFD with a new one.
AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT
Audio signal output is small or not. when you power on the Middle Power Mini System
How to troubleshoot (Countermeasure)
1) Please check if this system is on bass blast mode.
  C, RL and RR make sound only on bass blast mode.
2) Check the IC700~IC705 on your eyes.
3) Check the audio signal output check (pin13 of IC700~IC705).  First, Check the PWM Data input (pin3 of IC700~IC705)
4) If the audio signal output has no output, try to change IC which has no output.
5) Lastly, check Speaker Terminal (TM700).
NO POWER ON (STANDBY LED IS BLINKING)
It doesn’t turn on, and blinks standby LED(Red).
AMP FETs
Solution
Replace AMP FET on MAIN board.
How to troubleshoot (Countermeasure)
1) This symptom occurs, when DC protection is detected. Main reasons are like below.
- When some of AMP FETs dead.
SPEAKER NO AUDIO
Speaker No Audio
AMP IC (IC700~IC705)
Solution
Replace IC700~IC705 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check supply voltage of AMP(CN110) & PWM signal  Normal supply voltage and signal > Check AMP IC.  Poor supply voltage > Check SMPS Assy.
Poor signal Æ Check PWM IC.
2) Check CSD of FET driver IC (IRS2092 : EAN60778301).
CSD has about 5 V on normal state.
When AMP has problem, CSD is LOW state or keep change LOW to HIGH.
NO BOOTING IN CD/USB FUNCTION - 1
After you turn on power key and displayed message in the following order (HELLO > VOL XX > CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
NO VCC33, VCC12
Solution
Please check and replace IC505, IC500 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check Voltage of IC505 pin3 on MAIN board.
  If IC505 pin3(about 4.9 V) & D500 Input 5.6 VA doesn’t come out, check 5.6 VA from SMPS board.
2) If IC505 pin3(about 4.9 V) is normal, check the PWR_CTRL(IC505 pin2) is high (about 3.3 V)
  If PWR_CTRL isn’t high, check pin B2 of IC501 & R524, R522
3) If PWR_CTRL is high, check R524 and if there’s no defective component then replace IC505.
4) If 3.3 V(VCC33) is normal, check 1.2 V output(pin2) voltage of IC500
  If 1.2 V of IC500 pin2 doesn’t come out, then replace IC500.
NO BOOTING IN CD/USB FUNCTION - 2
After you turn on power key and displayed message in the following order (HELLO > VOL XX > CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
CRYSTAL (X500)
Solution
Replace X500 on MAIN board.
How to troubleshoot (Countermeasure)
1) If 3.3 V & 1.2 V is normal, Check the CHIP_RESET of IC501 pin T12 on MAIN board.
 If CHIP_RESET isn’t high, Check MICOM(IC101) pin40.
2) If CHIP_RESET is high, Check the soldering status of 24 MHz crystal (X500).
3) If the crystal (X500) doesn’t oscillate, Check R508, R509, C502, C503 around crystal (X500).
 If there’s no defective component, then replace X500.
NO BOOTING IN CD/USB FUNCTION - 3
After you turn on power key and displayed message in the following order (HELLO > VOL XX > CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
SERIAL FLASH (IC503)
Solution
Please check and replace IC503 on MAIN board.
How to troubleshoot (Countermeasure)
1) If the crystal(X500) does oscillate, Check Serial Flash(IC503) on MAIN board.
  Check 8pin(VCC), 6pin(CLK), 1pin(CS), 2pin(DO), 5pin(DI) of below waveform.
2) If pin8, 6, 1, 2, 5 doesn’t come out, Check damping resistor(R564, R563, R535, R536, R534) of IC503.
  If damping resistor of IC503 is OK, then replace IC503. (it need to download program)
3) After change IC503, if It is still not below waveform, Check IC501(DSP IC).
NO BOOTING IN CD/USB FUNCTION - 4
After you turn on power key and displayed message in the following order (HELLO > VOL XX > CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
SDRAM (IC502)
Solution
Please check and replace IC502 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check below waveform & soldering status of SDRAM (IC502) on MAIN board.
 If pin17(#CAS), pin18(#RAS), pin19(#CS), pin38(CLK), pin29(address), pin2(DQ) doesn’t come out,
Check damping resistor (R568, R570, R544, R547).
2) If resistor is OK, then replace IC502(SDRAM).
3) After change IC502, if It is still not below waveform, Check IC501 (DSP IC).
NO BOOTING IN CD/USB FUNCTION - 5
After you turn on power key and displayed message in the following order (HELLO > VOL XX > CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
DSP (IC501)
Solution
Please check and replace IC501 on MAIN board.
How to troubleshoot (Countermeasure)
1)After check them by Previous pages about NO Booting, if the set is still no booting,
  Check soldering status of IC501.
2) If below bootstrap waveform doesn’t come out, then replace IC501(DSP IC).
Servo schematic
ADC shematic
CD-DSP schematic
NO OPERATION OF MD - 1
When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the spindle motor among them.
SPINDLE MOTOR
Solution
Replace IC401 or IC400 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check the SPDO signal from pin16 of IC401.
 If no signal, check 3.3 V (RF) and X400.
2) Check the SPIN- & SPIN+ from IC400 to CN401 for driving SPINDLE motor. It is about 3.6 Vp-p.
 If no signal, check +7 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
 If the spindle motor is short-circuit or has any trouble, it cannot rotate CD discs.
Please check the function after changing another MD.
NO OPERATION OF MD - 2
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the sled motor among them.
SLED MOTOR
Solution
Replace IC401 or IC400 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check the SLDO signal from pin23 of IC401.
  If no signal, check 3.3 V (RF) and X400.
2) Check the SLED+ & SLED- from IC400 to CN401 for driving SPINDLE motor. It is about 2.9 Vp-p.
  If no signal, check +1.8 V and +5 V for IC400.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
  If the sled motor is sort-circuit or has any trouble, it cannot move the pickup module.
Please check the function after changing another MD.
NO OPERATION OF MD - 3
When no sound output in the CD function, you cannot listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the tray open/close motor among them.
TRAY OPEN/ CLOSE MOTOR
Solution
Replace IC401 or IC400 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check MOT_OPEN & MOT_CLOSE signals from pin K4 & L4 of IC501 to IC400.
  If no signal, check +1.8 V & + 5 V to IC400.
2) Check LOAD ± from IC400 to CN401 for driving the tray open/ close motor. It is about 3.85 Vp-p.
  If no signal, check +5 V to IC401. If it has any trouble, replace it with a new one.
3) Check if the FFC cable is solidly connected between CN401 and MD.
4) Check the MD.
  If the tray motor is short-circuit or has any trouble, it can not open or close the tray.
Please check the function after changing another MD.
NO OPERATION OF MD - 4
When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the laser tracking actuator.
LASER TRACKING ACTUATOR
Solution
Replace IC401 or IC400 on MAIN board.
How to troubleshoot (Countermeasure)
The tracking actuator makes the laser beam be positioned in the center of a track on CD disc.
1) Check the TRD signal from pin14 of IC401.
  If no signal, check 3.3 V (RF) and X400.
2) Check TR- & TR+ from IC400 to CN400 for driving the tracking actuator.
  If no signal, check +1.8 V and +5 V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
  If the pickup module has any trouble, it can not move the laser beam on the left or right side.
Please check the function after changing another MD.
NO OPERATION OF MD - 5
When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the laser focusing actuator.
LASER FOCUSING ACTUATOR
Solution
Replace IC401 or IC400 on MAIN board.
How to troubleshoot (Countermeasure)
The focusing actuator makes the laser beam keep a regular interval with the surface of a CD disc.
1) Check the FDO signal from pin13 of IC401.
 If no signal, check 3.3 V (RF) and X400.
2) Check F- & F+ from IC400 to CN400 for driving the focusing actuator.
 If no signal, check +1.8 V and +5 V for IC400.
3) Check if the FFC cable is solidly connected between CN400 and MD.
4) Check the MD.
 If the pickup module has any trouble, it can not move the laser beam on the top or bottom side.
Please check the function after changing another MD
Power amplifier schematic
NO SOUND - 1
There is no sound output in the USB function, repair the set according to the following guide.
USB FUNCTION
Solution
Replace IC501 on MAIN board, IC312 on FRONT board.
How to troubleshoot (Countermeasure)
1) Check +5 VU to FRONT board.
 if +5.6 VA to pin2 of IC312(LDO) doesn’t come out, check pin4 & 5 of CN314.
 if +5.6 VA is normal & +5 VU of IC312 pin3 doesn’t come out, then replace IC312.
2) Check “Digital audio AMP block”.
NO SOUND - 2
There is no sound output in the AUX function, repair the set according to the following guide.
AUX FUNCTION
Solution
Replace IC201 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check AUX_L/R signals to IC201 (pin23, 24).
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC201.
3) Check if ADC/MIC_DATA is entered from IC201 to IC501.
 If no signal, check +5 V & +3.3 V(ADC) for IC201. If is NG, replace it a new one.
4) Check the following I2S signal flow from IC501 to IC202.
 If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to
the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay.
 If AMP is damaged, replace it with a new one.
NO SOUND - 3
There is no sound output in the PORT. IN function, repair the set according to the following guide.
PORT. IN FUNCTION
Solution
Replace IC201 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check PT_L/R signal from FRONT board to MAIN board.
2) Check if PT_LR is entered pin25 & 27 of CN605 ð pin25 & 27 of CN315.
3) Check PT_L/R signals to IC201(pin9, 10).
4) Check if ADC_BCK, ADC_LRCK & DAC_MCLK are entered from IC501 to IC201.
5) Check if ADC_DATA is entered from IC201 to IC501.
  If no signal, check +5 V & +3.3 V(ADC) for IC201. If is NG, replace it a new one.
6) Check the following I2S signal flow from IC501 to IC202.
  If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
7) Check if the digital audio AMP block is okay.
  If AMP is damaged, replace it with a new one.
NO SOUND - 4
There is no sound output in the TUNER function, repair the set according to the following guide.
TUNER FUNCTION
Solution
Replace IC201, TU500 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check if TUNER_L/R is entered from pin1 & 3 of TU500 to IC201(pin26, 27).
  If no signals, Check +3.3 V for Tuner power.
  Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC501 to TU500.
If it doesn’t work, replace TUNER with a new one.
2) Check if ADC_BCK, ADC_LRCK & DAC_MCLK are entered from IC501 to IC201.
3) Check if ADC_DATA is entered from IC201 to IC501.
  If no signal, check +5 V & +3.3 V (ADC) for IC201. If is NG, replace it a new one.
4) Check the following I2S audio signal flow from IC501 to IC202.
  If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay.
  If AMP is damaged, replace it with a new one.
NO SOUND - 5
There is no sound output in the MIC IN function, repair the set according to the following guide.
MIC IN FUNCTION
Solution
Replace IC200, IC206 on MAIN board.
How to troubleshoot (Countermeasure)
1) Check MIC_SIG signal to pin33 of CN605.
  If no signal, Check the signal to pin33 of CN315 on the FRONT board.
Check if the signal is entered from pin6 of CN605 to MAIN board.
2) Check if MIC_SIG is entered from pin33 of CN605 to pin3 to IC200 (MIC AMP).
3) Check if the amplified signal comes out from pin4 of IC200.
  If no signal output, check +12 V for IC200, replace IC200 with a new one if it has a problem.
4) Check if MCS_BCK, MCS_MLCK & MCS_LRCK is entered from IC501 to IC206.
Check if MIC_DATA_IN is entered from pin9 of IC206 to pin T1of IC501.
  If no signal, check +5 V & +3.3 V for IC206. If it is abnormal, change replace it a new one.
5) Check the following I2S signal flow from IC206 to IC501.
  If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one.
6) Check if the digital audio AMP block is okay.
  If AMP is damaged, replace it with a new one.
NO SOUND - 6
There is no sound output in the Bluetooth function, repair the set according to the following guide.
BLUETOOTH FUNCTION
Solution
Replace IC501 on the MAIN board or B/T module on the Front Panel.
How to troubleshoot (Countermeasure)
1) Check BT_RX, BT_TX signal to pin4, 6 of CN504.
 If no signal, Check the signal to pin4, 6 and pin10 (+3.3 V) of on the Bluetooth module and cable
connection state.
 If there are no signal out from module, replace new module.
2) Check if BT_RX/TX is entered from pin4, 6 of CN504 to pin K1, L1 to IC501 (DSP).
3) Check the following I2S signal flow from IC501 to IC600.
 If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one.
4) Check if the digital audio AMP block is okay.
 If AMP is damaged, replace it with a new one.

Tuesday, November 29, 2016

Sony MHC GTX88 – Brazilian Model – power supply, power amplifier and sub woofer section circuit diagram - STK433-130-E, STK412-150C

Power amplifier and Sub-woofer amplifier circuit using STK433-130-E, STK412-150C _ Sony MHC GTX88
Power supply transformer circuit
Power supply PWB

Power amplifier L and R circuit diagram
Power amplifier PWB
Sub-Woofer PWB
Sub-Woofer circuit diagram
Click on the schematics to zoom in

Monday, November 28, 2016

LG MCT354 - LG MCS354F/W - Mini-Component system – circuit diagram and firmware update procedure

Used ICs: STR-X6769N, STR-A6252, BU9543KV, IP9011, PS9831, MSGEQ7N, LC87F5NCBA, PT6324, MLC9800, HA12237F, TAS53X2, AK5358A.  LG MCS354F/W – LGMCT354 – SCHEMATIC – MINI COMPONENT SYSTEM – software upgrade procedure, schematic
GUIDE TO DOWNLOAD PROGRAM
CAUTION: Do not perform any other functions such as disconnecting the USB device, changing the function, and Power while you are downloading to the device. The USB device must be Disconnected after the download has been completed.
AUDIO USB DOWNLOAD GUIDE
1 When the device is inserted into the USB function, "File: MCT354_yymmddx.hex" * x:.
2 The "Upgrade" message appears after downloading
3 Power turns off automatically when the download is complete.
SMPS  Click on the schematics to zoom in
Servo
PWM
Micom
DSP
Deck
ADC
Power amplifier
USB DVD DOWNLOAD GUIDE
The downloadable program file must be saved with the name BANK ROM
- The downloaded file must be renamed as BANK30 ROM
- After secure storage of the BANK30 ROM in the USB device, follow these steps
1 When the USB device is inserted in the USB function, the screen is changed to a download screen
2 When the download is complete, the message "Completed" is shown on the top side Left of the screen
3 Turn on the power, press the SETUP button on the remote control unit in the USB FUNCTION
When the SETUP window appears on the screen, scroll down once to select the DISPLAY
Go to TV Aspect in the menu on the right, go to "16: 9", enter "1 3 9 7 1 3 9" using the keys your remote control unit, and then press the ENTER key.
Information is displayed If it is not displayed, redo the steps above.
4 When step 3 has been completed, press the PAUSE button on the remote control
5 Disconnect the power cord, and reconnect it after 5 seconds to complete the download
6 When the power has been turned on, the language selection menu is initially displayed
After selecting the desired language, press SELECT / ENTER.

Sunday, November 27, 2016

RCA 26LASSRQ LCD TV – How to enter service mode – Firmware upgrade - troubleshooting – Universal remote control set-up codes

Firmware upgrade
REC7 series main board has a USB SERVICE port, which is reserved for service use only. Please upgrade the firmware according to the instruction below.
Direct upgrading (do not need normal display)
STEP1: Get an empty USB disk with size not larger than 2GB, copy firmware file (CompBase.bin, or AlICompBase.bin) to the root directly of disk.
Note: the size of USB disk cannot be larger than 2GB, and before copying the firmware file, make sure the disk is empty.  And the file must be placed in the root directory.
STEP 2: Turn off the TV, insert the USB disk into the SERVICE jack on the side panel of TV and then turn on the TV. After turned on, the TV's LED indicator will shine red and blue alternately. Wait for about one and half a minute to accomplish the upgrading.
Note: DO NOT power off or unplug the TV while upgrading.
Factory upgrading (need normal display)
STEP1: Get an empty USB disk with size not larger than 2GB, copy firmware file (AIICompBase.bin only) to the root directly of disk.
Note: the size of USB disk cannot be larger than 2GB, and before copying the firmware file, make sure the disk is empty.  And the file must be placed in the root directory.
STEP 2: Turn on the TV, insert the USB disk into the SERVICE jack on the side panel of TV. Then press the remote control buttons “MENU" > "1147" to enter factory menu [Service mode]
STEP 3: Choose "USB UPDATE" and press OK. If there are "CompBase.bin" and "AlICompBase.bin" in the disk at the same time, be sure to select "AIICompBase.bin" to update. The upgrading phenomenon is the same to direct upgrading.
Note: DO NOT power off or unplug the TV while upgrading, otherwise the upgrading will fail, and the main board will be unable to upgrade any more.
Troubleshooting
Before opening the cabinet and working on the repairs, keep in mind that most of the problems caused by improper using or settings to the TV set. If all of it are found OK, carry out the easy troubleshooting before checking or replacing the main parts of the television. The troubleshooting guides given below base on the situation in which the TV's functions are set and used properly
TV cannot be turned on
 Check the connection and condition of wires and inlets that relate to power board, including the AC power inlet, the power incoming wire, wires between power board and main board, etc.
 Check the diagram around power board to see If there exists a short circuit or creepage.
 The power board may be bad. Please change the board for testing. If it cannot help.,
 In addition, the malfunction of LCD panel can cause failure of power on.
Auto turning off
 Check the sleep timer setting.
 Check the surrounding diagram of power board. The problem is most possibly caused by short circuit or wire breakage, because this kind of malfunctions can cause excessive current, which will make the power board startup self-protection.
The screen goes black after a shorting blink
 If the TV screen can not display after the blink, that means the panel or other parts of equipment is broken (most likely by improper input voltage). Ensure the input voltage of every component, and then check the part that is suspected damaged.
 If this problem occurs repeatedly, check the surrounding diagram and connections of panel inverter board. Also, the black-light unit and LCD lamps should be checked out.
There exist afterimages after power off
 If the panel can work normally at the other time, it may be caused by bad main board. Upgrade to the latest software first, if that does not work, attempt to change the main board.
There exists squeak when TV is working
 Listen to the squeak carefully to make sure where the noise comes from. If it is from speakers, the voice may be caused by bad speakers. Change them for a try..
 If the noise comes from the inner parts of cabinet, it may be produced by abnormal AC current in power board. Change the board and check its surrounding circuits for a try.
 Check the routing of wires inside the cabinet to suppress interference.
Troubleshooting for Displaying
Note: If the troubleshooting given below can not help you, change the LCD panel for a try. But we strongly suggest you regard changing the panel as the last step of fixing the display problem.
No display (including white screen, black screen, etc.)
 Check the power board output and main board input ports to make sure whether the TV has been turned on successfully, because the failure in power on can lead to a no-display problem.
 If it is proved to have been electrified and turn on, check the LVDS cable first.
 Check if both of the two plugs of the flat cable between main board and power board have been well inserted into the slots.  Unstable power supply can also cause serious display problem.
 If the display problem only happens in one input mode, that may be caused by wrong version software. Update the new software. If that can't help, change the main board for a try.
Screen tearing, or there exists moire on screen
 Bad LVDS cable and inappropriate panel driving voltage is still the biggest factor of this problem. So check them first.
 If the cable and voltage are correct, update the software for a try.
 Sometimes the fastening pieces can make improper pressure to LCD panel, check them out.
 If the screen tearing happens in one or several input sources while the other source can display normally, it can be caused by bad main board most likely. Please change the main board for a try.
Line on screen
 If the bad line is very narrow, it is usually caused by LCD panel malfunction, change the panel for a try.
 If the lines link together and become a bad band, upgrade the software and then check the ports and circuits of broken down output mode(s).
 If the darWlight line ,or band, appears in all the input modes, please change the LCD panel. But we suggest you check the panel inlet board(which links the panel and main board though LVDS cable) first, because sometimes the liquid crystal displaying unit is okay, while the inlet board has a transmitting problem, which also will lead to a displaying failure.
color cast or interference
 If the cast or interference happens in only one input mode, check the output port (on main board) and transmitting network (around main board) of that mode.
 If the cast or interference happens in all the input modes, please exclude the malfunction according to easy troubleshooting for No Display. If that cannot help, refer to chapter 5 for more details and resolution ways. In addition, most of this kind of problems come from the bad main boards.
Troubleshooting for Audio
Note: Comparing with the display problem, the audio malfunctions are easier to work out. Constantly, if you have excluded the possibility of bad speakers and bad connection of audio output, the problem generally comes from the audio processing parts of main board. Please change main board for a try.
No Sound
 Check whether the speakers are broken first.
 Check the wire that links the main board and speakers. Watch if there is fracture or cladding material breakage.
 Check the joint of speakers and audio wire, watch if there is poor soldering or fake solder. Besides, the polarity mistake can also lead to audio problem.
Volume too low
 Check whether there is a jam at the sound hole in front cabinet.
 Check whether one or more speakers are bad.
Sound channel loss or confounding
 Check whether the audio wires are installed reversely. The left channel wire should be white and the right channel wire is red.
 Check the audio output socket of main board to see whether it is wrongly inserted. If not, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways.
 If the connection is stable and right, the main board audio output module may be bad, refer to chapter 5 for more details and resolution ways.
Noise
 Check if there is anything should not exist in the speaker hollow space (such as screws).
 Check if the anti-hunting EVA is broken or missing.
 Check if the speakers are bad.
Troubleshooting for Keyboard
No key can work
 Check the wire between main board and keyboard, watch if there is fracture or cladding material breakage.
 Check the joint of main board and keyboard wire, watch if there is poor soldering of fake solder.
 Check the resistances that locate on the keyboard PCB. Watch if there is wrong or broken ones. Also, the poor soldering of fake solder should be concerned and checked carefully.
 Check the other components of keyboard(such as capacitors and micro switches) are wrong or bad.
Keys are sunken
 Check the screws that fasten the keyboard to the cabinet. They may be lost or getting loose.
 The key set may be bad, change them.
There is a reacting delay when operating the keys
 That is usually caused by bad keyboard, change it for a try.
Functions of keys are out of order
 Check the keyboard to see whether there is a short circuit between each soldering joint.
 Check all the resistances on PCB board.
 If a key is supposed to be able to achieve more than one functions, but it can achieve not all of them, that is usually caused by wrong software. Update the latest and correct software for a try.
 If you can't ensure where the problem comes from, change the keyboard for a try. If that still can't help.
Troubleshooting for Remote Control
Note: If the troubleshooting can not help, please change the RC board. If that still can't solve the problem
The RC (remote control, the same below) does not work
 Check the wire between main board and RC board, watch if there is fracture or cladding material breakage.
 Check the joint of main board and RC board wire, watch if there is poor soldering or fake solder. Also, the short circuit can lead to this problem, too.
 Check the infrared sensor that locates on the keyboard PCB. Watch if it is wrong or broken. Also, the poor soldering of fake solder should be concerned and checked carefully.
 Check the other components of RC board are wrong or bad.
The LCD displays light in wrong color
 The short circuit is the most probable cause of this fault. Check the wire and joints for a judgment.
 Check the cable that links main board and RC board, watch if it is inserted with wrong location(similar with left-right channel wire fault for audio).
 Check the LCD assembling, watch if its pins are in wrong location.
Display Exceptions
Black screen and no display
Note: If the troubleshooting guide cannot help you with the obviation of faults, please change the non-conforming materials to rework.
V260B2- P03 is a 26-inch TFT LCD cell with driver ICs and Ich-LVDS interface. This module supports 1366 x 768 WXGA format and can display 16.7M colors ( 6 bit+Hi FRC). The backlight unit is not built in.
Specs and other descriptions
Diagonal Display Size:  26 inches
Television System: American TV standard ATSC/NTSC system
Channel Coverage: VHF: 2-13 UHF: 14-69 CATV: 1-135
 Digital Terrestrial Broadcast (8VSB) : 2- 69
 Digital Cable (64/256QAM) : 1-135
Power Supply:  AC 110 V, 60Hz
Audio output: Headphone x 1, Digital Audio Out x 1, AV x 1
Resolution: 1366 x 768
Component/HDMI mode: 480i, 480p, 720p, 1080i
Weight: 15.9LBS (7.2KGS)
Power Consumption: less than 80W
> HEAD PHONE: Connect a 3.5mm headphone for personal audio.
> Digital Audio-out: Connect a coaxial cable for digital audio output. HDMII, 2, 3, 4: (High-Definition Multimedia Interface) It provides an uncompressed digital connection that carries both video and audio data by way of an integrated mini-plug cable.
> AUDIO OUTPUT L/R: Connect double-channel coaxial cables for analog audio output.
Note: .Digital Audio-out and AUDIO OUTPUT L/R are supposed to be connected to audio power amplifier, which provides smoother and more powerful sound performance.
> AUDIO-IN L/R, Video In: Connect an AV device that has composite video jacks, such as a VCR or a DVD player. To access device connected to these jacks, press the INPUT button on your remote; then press the up/down arrow to select AV. Press the ENTER button at last to confirm.
> AUDIO-IN L: Left audio channel connection. The left audio connector is usually white.  For mono audio sources, be sure to use the left AUDIO INPUT.
> AUDIO-IN R: Right audio channel connection. The right audio connector is usually red.
> COMPONENT Y/Pb/Pr: Connect a device that has component video jacks, such as a DVD player.  To access device connected to the Y/Pb/Pr jack, press the INPUT button on your remote; then press the up/down arrow to select Component. Press the ENTER button at last to confirm.
> Y/Pb/Pr (Component Video): They provide good picture quality because the video signal is separated into three components.  Use three video-grade or component video cables for the connection. When using Y/Pb/Pr, make sure you connect left and right audio cables to the Audio L and Audio R jacks.
> PC INPUT VGA: Connect your computer or other device with a VGA output to this jack using a 15-pin, D-sub cable.
> PC INPUT Audio-In: Use to obtain sound when a PC is connected to TV. Use 3.5mm stereo mini-pin cable to connect PC to TV.
> ANT/CABLE: Connect to receive the signal from your antenna or cable via coaxial cable.
> SERVICE: For service use only. Do not connect any device.
Universal Remote control set-up codes to check with RCA brand TVs
0154 0190 0196 0218 0233 0237 0436 0673 0827

Saturday, November 26, 2016

Toshiba LED 32L2400, 48L2400 and DL4845 Service mode – Software update – SMPS and backlight inverter circuit diagram – 32Inch, 40Inch LED LCD televisions

Toshiba LED TV 32L2400, Toshiba 40L2400, Toshiba 48L2400, Toshiba DL3245i, Toshiba L4045i, Toshiba DL4845i – Firmware update, Hotel mode adjustments, SMPS, Back-light inverter and audio amplifier schematics, How to enter the service mode, Software update, Hotel mode and adjustments, Universal remote control set-up code list
VERIFYING THE SOFTWARE VERSION
Using the Remote Control in the Image Menu, enter "2008". This option opens the version of software of the appliance.
To Unblock THE APPLIANCE
In case the customer forgets the blocking code of the entries / indicative classification, Enter the code "1980" to unlock.
SERVICE MENU OPERATION KEYS
Use the "Enter" key to access the service menus, press "Menu" to go back 1 Menu and use the Up|Dn, <and> <e> keys to select or adjust.
Circuit diagrams [Click on the schematics to zoom in]
Toshiba 32L2400 - Ethernet circuit
Toshiba 32L2400 SMPS CIRCUIT
Toshiba 32L2400 Back-light inverter circuit
Toshiba 32L2400 - Audio amplifier circuit
MAIN SOFTWARE RECORDING (Via USB).
The "KKMTUpgrade" software to be installed in the root (Do not put it In folders or subfolders) from a USB device.
Connect the device to one of the USB ports.
Use the User Menu to update it:
Open the Menu and select "Configuration" and in the submenu choose the option "Update Select "USB" and confirm the "Yes" option.
Use the Factory Menu to update it:
In the menu enter "2008" to open the Factory Menu and select the "USB Upgrade" and select the Software Upgrade option.
Do the update as follows:
- With the TV in stand by and the connected USB flash drive, press and hold the Button on the TV until a blue screen with Percentage of SW update.
MBOOT SOFTWARE UPDATE
RECORDING THE MBOOT SOFTWARE (Via USB).
The "MBOOT.bin" software to be installed in the root should be written (Do not put it In folders or subfolders) from a USB device.
Connect the device to one of the USB ports.
Using the Factory Menu to update it:
In the menu enter "2008" to open the Factory Menu and select the "USB Upgrade" and select the MBoot Upgrade option.
VIDEO GAIN ADJUSTMENT (after changing the LCD panel or Software Update)
VIDEO COMPONENT ADC (OFFSET) GAIN ADJUSTMENT
Connect a colored bar or grayscale signal to the input to be adjusted, Component (YPbPr)
Select the input to be adjusted (Component) and then enter Service Mode.
Select the "ADC ADJUST" setting menu.
In the "ADC ADJUST" menu, select the "AUTO ADC" item and start the auto Direction keys "<" or ">".
Note: The Component input (YPbPr) requires HD (720 or 1080) and SD (480).
Toshiba 48L2400 SMPS circuit
Toshiba 48L2400 Back-light inverter circuit
Toshiba 48L2400 audio amplifier circuit
Ethernet circuit
PROCEDURE FOR ACCESS to Hotel Mode adjustments
1. On the remote control, press the MENU button.
2. Using the Up or Dn keys select the LOCK menu and press the ENTER key.
3. You will be prompted to enter the password, enter the password 9512.
4. Enter the LOCK Menu where one of the options will be Hotel Mode.
5. Select the Hotel Mode option and press the ENTER key to start the settings.
AVAILABLE SETTINGS
MODE Options:
HOTEL Call > To enable and adjust all other Menu options Off > Disable all menu setting options, the Operate without the conditions of HOTEL MODE.
MAX 0 ~ 100
VOLUME Sets the maximum volume the user can reach.
For example, if you set 30 the user can increase the volume only up to 30 bar Of volume.
POWER Options:
ON Standby: When turning the TV on the mains power off and on, the same turn on stand by
MODE Power On: Turning the TV on and off the power on the same turn on.
LOCK Options:
KEY On > Locks all keys on the TV set.
Off > Device keys operate normally.
START Option to select the input source that will appear each time the TV is turned on.
CHANNEL Enables a START CHANNEL sub menu with the following options:
A) Start Channel: ON and OFF (disabled, last signal source).
B) START SOURCE: Allows you to select the input source:
Antenna, Cable, AV, Component, HDMI1, HDMI2, HDMI3, USB.
C) CHANNEL: Enabled only for the antenna and cable option, where you can select the The TV should always turn on.
Note: Only a previously tuned channel can be selected and enabled.
BACKUP Options that work together to transfer data set to 1 device for DATE other handsets of the same model.
BASE Procedure for data transfer:  NO REFERENCE:
UPDATE 1 - Connect a formatted USB flash drive to one of the USB ports
DATE 2 - Select the BACKUP DATABASE Option and press> to make the connection
BASE pen drive > TV
3 - In this line the picture CONNECTED will appear when the connection is finished;
4 - The TV will turn off and stay in standby mode. When the power off is because the data has already been copied to the thumb drive, and it may be disconnected from the TV.
IN THE APPARATUS THAT WILL RECEIVE THE COPY:
1 - Connect the pen drive with the data of the reference device to the USB input of the TV;
2 - Follow the procedure to enter hotel mode;
3 - Select the UPDATE DATABASE option to copy the information to the TV.
Pen drive;
4 - The TV will turn off and on again at the input determined in the hotel mode.
Grades:
- On devices that will receive data from the reference device, it should not be selected the BACKUP DATABASE option. If this option is selected the data will be
Replaced by the TV data.
- In addition to all hotel mode options will also be copied to the CHANNEL LIST
Settings that will be disabled for users.
- All from the "Picture" Menu.
- All from the "Sound" menu
- All from the "Function.
Universal remote control set-up codes tho Toshiba brand TVs [LCD and CRT TVs]
0018 0025 0039 0044 0045 0075 0101 0119 0128 0141 0143
0145 0165 0195 0227 0247 0369 0379 0460 0642 0658 0713
0810 0813 0814