AOC LE32D1440 – AOC LE39D1440 - LED TV Power supply regulator board - LED driver Circuit Diagram – Service Mode – Software Update

AOC LE32D1440/20 - LE39D1440/20 – Firmware Update – Factory Mode _ SMPS & LED driver schematic – White Balance Adjustment.

White Balance Adjustment
1. In Component signal mode, Signal generator will select Tim 314, Pattern 141(80% White);
2. Press "Menu +1+9+9+9+ back" into the factory mode.
3. Move the cursor to Current Source and choose component; Move the cursor to Color temp and choose color temp(Cool, Normal, Warm), Move the cursor to the Gain and adjust RGB parameters to make the color temperature value within the cool color temperature specifications(Specifications in the following table) (NOTE: What we need is the Gain after the Color temp )
Take LE32D1440 for example

Firmware Instruction
Step 1 - Ready for F/W Upgrade
Change the software file name to “install.img”.
Prepare a USB memory. Copy the file “install.img” from your computer to the USB memory root directory, and remove it from computer’s USB port
Step 2 - F/W Upgrade
Insert USB flash disk into TV’S USB .

AC on the TV, the indicator light will shine after about tens of seconds, and the software will update automatically.  TV will auto restart after update the software.
After restart, press “menu+1999+back” keys in remote control into the factory menu. Check the version of MCU, and restart, software update is completed.

LE32D1440 SMPS & LED DRIVER CIRCUIT DIAGRAM

 LE39D1440 SMPS & LED DRIVER CIRCUIT DIAGRAM

CLICK ON THE PICTURES TO MAGNIFY

AUDIO AMPLIFIER CIRCUIT DIAGRAM Used Semiconductors 2SC5200 – 2SA1943 (Power amp output) TL072 – TLE2072 - LM13600 – 3900

 POWER AMPLIFIER SECTION

PRE-AMP & INPUT SECTION

CLICK ON THE DIAGRAMS TO ZOOM IN

LG HX806CM Blu-ray HOME CINEMA SYSTEM Troubleshooting – Reset – Circuit Diagram

SMPS & POWER AMPLIFIER SCHEMATIC – SA RESET – TROUBLESHOOTING – LG  HX806CM Blu-ray Disc HOME CINEMA SYSTEM

TROUBLESHOOTING

When you turn on your set, it will display “PLEASE WAIT” on front panel, and it will not boot-up normally.  Two possibilities.

[1] IC501 (MPEG IC).

Replace IC501 on MAIN board.

How to troubleshoot (Countermeasure)
1) Please Check 1.15 V / 1.5 V / 3.3 V.  Check RESET_8550 (at the point of C586).
2) If it doesn’t work even though 1.15 V / 1.5 V / 3.3 V power and RESET_8550 are no problem, IC501 MT8555D could have problem.
3) If RESET_8550 isn’t high (3.3 V), you may need to replace IC101.
4) After changing it, if the set is still no booting, check MAIN board.

 [2] MAIN Board

Replace MAIN board.

How to troubleshoot (Countermeasure)
1) Please remove IC501 and IC601 ~ IC603, and then check the Impedance between each signal (DATA, ADDRESS, and so on.)
2) If there is some Impedance (a few ohm or infinite ohm) especially power source Trace, PCB via might be broken. You’d better change MAIN board.

When you connect AccuWeahter, You-tube or Picasa through the wired LAN, the “no connection” message appears.

JK801 (ETHERNET JACK)

Replace JK801 on MAIN board.

How to troubleshoot (Countermeasure)
1) Check you internet connection. Make sure it connect properly to modem or router.
2) If internet connection OK, please check the Ethernet Jack (JK801).
3) If there is soldering problem, please re-soldering pin JK801.
4) If after re-soldering problem still occurs, replace JK801.
5) If problem still occurs after change JK801. check MT8555D IC (IC501).

BAD HDMI VIDEO / AUDIO OUTPUT
When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed color on the screen. But component output is OK.

JK802 (HDMI JACK)

Replace JK802 (HDMI Jack).

How to troubleshoot (Countermeasure)
1) Check JK802 pin soldering.
2) If there is short soldering on pin JK802, re-soldering pin JK802.
3) If problem still occurs, check HDMI data on RN801 and RN802 :
> If all data OK, Replace JK802.
> If data NG, Replace IC501.

NO SPEAKER OUTPUT
When unit is connected to Speaker using speaker cable, no speaker output.

AMP BOARD

Replace AMP board.

 How to troubleshoot (Countermeasure)
1) Check Voltage at ACN602.
> If 30 V,12 V voltage doesn’t come out, re-soldering in ACN602.
2) Check Voltage at ACN601 pin12, 13.
> if 3.3 V voltage doesn’t come out, check IC303 in MAIN PCB.
3) Check the AMP_SD signal of pin16 at ACN601.
> If this pin is low, replace AIC701 or AIC702 or AIC703.
4) If problem still occurs, change AMP board.

HOW TO USE THE SA RESET FUNCTION

In order to insert the new SA adjustment values, it need clearing SA initial values of the flash memory.

REQUIRED SA RESET
* After changing Traverse.
* After changing Main Board Assembly.
* After changing Main Board Flash IC.

SA RESET PROCEDURE

Power on the set (then, mode is in home menu ).

Press Setup.

Under DISPLAY highlighted condition, press ‘5’ ->
‘1’ > ‘7’ > ‘7’ > ‘7’ > ‘7’ > ‘7’ on the remote controller to display special mode. Move to the SA / IOP Reset and click.

Insert BD-ROM SL Disc. (Tray is opened automatically.)

If the disc is inserted, you will see “Wait”.

If SA Adjustment is finished, tray is opened automatically.

Press stop key twice to escape this special mode.

"ALL BD DISC" READING ERROR
> All the Blu-ray disc is not operated, but DVD and CD are operated normally.
> If the LDO for APC of BD laser diode is abnormal, BD doesn't work.
> If the LD current control is abnormal, BD doesn't work.

Component
1) MD (Traverse Assembly)
2) IC701 – Adjustable LDOHow to troubleshoot (Countermeasure)
1) Check MD (Traverse, pick-up) first of all.
2) Check input / output voltage of LDO IC701 – (12 V, 9 V)
3) If output voltage is abnormal, check the periphery of IC701 and replace it.
4) Check the BD LD Control input / output.  If input signal (VRDC3O) is OK, but no output (BD_LD), check the TR Q702, Q706.

"ALL DVD DISC" READING ERROR
* All the DVD disc is not operated, but BD and CD are operated normally.
* If the LD current control is abnormal, DVD doesn't work.

Component
1) MD (Traverse Assembly)
2) Q701, Q704
How to troubleshoot (Countermeasure)
1) Check MD (Traverse, pick-up) first of all.
2) Check the DVD LD control input / output. If input signal (VRDC2O) is OK, but no output (DVD_LD), check the TR Q701, Q704.

"ALL CD DISC" READING ERROR
- All the CD disc is not operated, but BD and DVD are operated normally.
- If the LD current control is abnormal, CD doesn't work.

Component
1) MD (Traverse Assembly)
2) Q703, Q705
How to troubleshoot (Countermeasure)
1) Check MD (Traverse, pick-up) first of all.
2) Check the CD LD control input / output.  If input signal (VDACO) is OK, but no output (CD_LD), check the TR Q703, Q705.

POWER AMPLIFIER SCHEMATIC

SMPS SCHEMATIC

CLICK ON THE PICTURES TO ZOOM IN

VESTEL DVD 4250D – HOW TO ENTER SERVICE MODE – SMPS BOARD CIRCUIT DIAGRAM – FIRMWARE UPDATE

Service mode_SMPS (Power Supply Regulator Board) schematic_Software Update _ VESTEL 4250D – DVD PLAYER

CD Update Procedure of 4250D

Download the update file from the convenient link according to your default language choice.
While there is no CD in the DVD (No Disc Mode) , press “Menu - 1 3 5 7” buttons on the remote control in order to reach the Service Menu of DVD Player. (Note the software version described as “b.xx “ to be able to compare the sw. Version after update process.)
Copy the update file to the desktop and rename it according to the update file name in the hidden menu of the device. [For example If C2M1AS__ is written then rename it like C2M1AS__.rom
If P6M1AS__ is written then rename it like P6M1AS__.rom]
(If you receive the update file already renamed (with addition of .rom) from the customer technical support department by giving the SAP code of the product then burn the already renamed file with nero program as it is shown below.)

Burn the renamed files by Nero program with below set up.

ISO9660 > ISO LEVEL-1 > MODE -1 > NO MULTISESSION > JOYLET OFF > FINALIZE ON

After burning process is completed, place the update CD into the DVD tray and press play button.

Wait to see the update process steps as shown below. When the sw. Update is completed unit will switch itself to standby mode.

LOADING > READING > ERASE > WRITING > DONE

Finally, press the eject button and take out the update CD while DVD Player remains at standby Mode.

Updating process has been completed. To check whether it is updated correctly or not, repeat the first step for comparing software version.

If the previous and letter names are different, CD is update has completed successfully. If the name remains same than go through the steps from the beginning.

If the AC source breaks down while the updating the unit (main board) will be totally out of order. This kind of units/boards is out of Warranty.

Brief Information of Naming the File

Software version differs from each other depending on front models. 23xx and 24xx are called Old VFD and 25xx and 26xx are called Mini VFD. Each character in the file name is an abbreviation of a description as illustrated below.

SMPS SCHEMATIC

POWER SUPPLY [SMPS]
> Socket PL2 is the 220VAC input.
> Socket PL3 is used for the power button on the front panel.
> 3.15A fuse F1 is used to protect the device against short circuit.
> Voltage is rectified by using diodes D1, D2, D3 and D4. Using capacitor C33 (47?f) a DC voltage is produced. (310- 320VDC).
> The current in the primary side of the transformer TR2 comes to the SMPS IC (TNY267P). It has a built-in oscillator, over current and thermal protection circuitry and runs at 133kHz. It starts with the current from the primary side of the transformer and follows the current from the feedback winding.
> Voltages on the secondary side are as follows: 12 Volts at pin11 at C42, 5 Volts at C40,3.3 Volts at C38,  -22Volts at C44,-12 Volts at D22.
> D14 TL431 is a constant current regulator. TL431 watches the 5 volts and supplies the required current to IC2. There are a LED and a photo transistor in IC2. The LED inside the IC2 transmits the value of the current from D25 to phototransistor. Depending on the current gain of the phototransistor IC3 keeps the voltage on the 5-volt-winding constant.
>  –22 Volts is used to feed the VFD (Vacuum Fluorescent Display) driver IC on the front panel.

HOW TO TROUBLESHOOT RCA DLP PROJECTION TVs

DLP PROJECTION TV Troubleshooting Hints _ Service Menu _ Voltage chart to connectors

Important: Before replacing any circuit boards, recover the “Last Failure” code using Chipper Check. Also, it’s very important when troubleshooting to accurately identify the symptom in order to quickly isolate which circuit board or item has failed. The
‘Probable Causes’ listed in the accompanying procedures are in there ‘most likely order’, 1, 2, 3, etc.

Symptom: Dead Set/No Start (No relay click/No Power LED when AC applied)
Probable Cause:
1. Main Power Supply Board
Standby voltage is needed by the DM2CR and is obtained from the AC IN CBA. If the standby supply doesn’t turn on when AC is applied, the relay will not energize and the DM2CR doesn’t have the supply it needs.
2. DM2CR Module
If the power supply is OK but the DM2CR doesn’t respond to power on commands then the DM2CR module has likely failed.
Symptom: No Picture, Audio OK
(Relay click OK when AC applied, Power LED Flashes 4-5 times then stays on)
NOTE: The LED will only flash one time (4 to 5 flashes) and the unit must be reset by unplugging AC to get unit to flash again.
Probable Cause:
1. Lamp assembly
Obtain failure code with Chipper Check before replacing (or subbing) lamp assembly. A flashing Power LED indicates a lamp or lamp power supply failure and the lamp assembly is the most likely cause.
2. Lamp power supply
If the Power LED still flashes after replacing the lamp assembly, replace lamp power supply
3. Main Power Supply Board
The source voltage for the lamp power supply is developed on ACIN CBA.
Symptom: Pixelization, Digital Freezing &/or Digital Noise/Artifacts
Probable Cause:
1. Weak terrestrial (ATSC) signal
A weak ATSC terrestrial (check strength of terrestrial signal) signal can cause pixelization or freezing. An external antenna can dramatically improve ATSC reception.

2. Formatter CBA
Apply 2H YPrPb to an external input. If pixelization is still present replace Formatter CBA.
3. DM2CR module
Always perform a ‘Reset’ by removing and reapplying AC Power. If pixelization not present with 2H YPrPb applied to external inputs, replace DM2CR.

4. Light Engine
Before replacing light engine, confirm picture quality issues by accessing the test patterns in the service menu 80. All patterns accept the cross hatch are generated by the formatter CBA. The cross hatch is generated by the light engine.
Symptom: Instrument starts normally then shuts down (runs 20-30secs)
NOTE: When unit shuts down, Power LED blinks three (3)
times. Set restarts automatically after 20-30 seconds. After 3rd cycle unit remains shutdown (unplugging resets unit).
Probable Cause:
1. Failure of lamp cooling fan or DLP device cooling fan.
Symptom: Poor Picture Quality (spots, discoloration, color impurities, etc.)
Probable Cause:
1. Poor Signal Quality
Whenever dealing with picture quality issues, always check quality of signal source before servicing unit.
2. Light Engine
Before replacing light engine, confirm picture quality issues by accessing the test patterns in the service menu 80. All patterns accept the checker board are generated by the ormatter CBA. The checker board is generated by the light engine.
Symptom: Rotated or Offset Picture
Probable Cause:
1. Mis-aligned Light Engine or centering.
Perform mechanical rotation adjustment of light engine and/or use service menu 76 to adjust horizontal and vertical centering.
Symptom: Stuck pixels
(Black and/or White)
Probable Cause:
1. Light Engine
The DLP defect tolerance specification allows for no more than 2 dark pixels and 0 bright pixels.
Symptom: Dead Set, No Power LED
(20-25sec boot when AC is applied, relay click OK when AC applied)

Probable Cause:
1.DM2CR module
When AC is first applied the DM2CR goes through a boot up sequence. If the Power LED doesn’t light when AC is applied, the DM2CR is not booting.
Symptom: Dead Set, Power LED stays ON when AC is applied (relay click OK when AC applied)

Probable Cause:

2.DM2CR module
When AC is first applied the DM2CR goes through a boot up sequence. If the Power LED remains on when AC is applied (should go off in 20-25sec), the DM2CR is not booting properly.

Service Menus & Diagnostics
Service Menu (V:76): Turn instrument on, then press and hold Channel Down & Menu simultaneously. Next, select Service Alignment in menu, then volume Up to V:76 then Channel Up and Down to desired adjustment. After selecting adjustment, Volume Up/Down changes value of adjustment. Press off to exit.
Test Patterns (V:80): Enter service menu and volume up to V:80. Channel up to go to patterns. The skip button toggles the pattern and the menu button toggles between the pattern and normal video. To exit, press the off button.
Usage Clock (V:90): Enter service menu and volume up to V:90. Channel up for usage clock. Press off to exit.
Error Codes (V:50): Enter service menu and volume upto V:50. Channel up for first failure code. Channel up for next of 8 failure codes. Pressing clear removes error code. Last error is most recent failure code. I.E: if four (4) errors are listed, four is the most recent. To exit, press the off button.
DM1 Warm Reset: Press and hold Channel Down & Power button simultaneously for approximately 3 secs.

Voltage Chart
Note: All voltages measured with a Fluke VOM ON 200V range. Standby voltages measured after run supply has been off for greater than 2 minutes. Ground for all ACIN voltages connected to JW24630, grid coordinate II02.

Service Menus & Diagnostics
Service Menu (V:76): Turn instrument on, then press and hold Channel Down & Menu simultaneously. Next, select Service Alignment in menu, then volume Up to V:76 then Channel Up and Down to desired adjustment. After selecting adjustment, Volume Up/Down changes value of adjustment. Press off to exit.
Test Patterns (V:80): Enter service menu and volume up to V:80. Channel up to go to patterns. The skip button toggles the pattern and the menu button toggles between the pattern and normal video. To exit, press the off button.
Usage Clock (V:90): Enter service menu and volume up to V:90. Channel up for usage clock. Press off to exit.
Error Codes (V:50): Enter service menu and volume upto V:50. Channel up for first failure code. Channel up for next of 8 failure codes. Pressing clear removes error code. Last error is most recent failure code. I.E: if four (4) errors are listed, four is the most recent. To exit, press the off button.
DM1 Warm Reset: Press and hold Channel Down & Power button simultaneously for approximately 3 secs.

Voltage Chart
Note: All voltages measured with a Fluke VOM ON 200V range. Standby voltages measured after run supply has been off for greater than 2 minutes. Ground for all ACIN voltages connected to JW24630, grid coordinate II02.

PALSONIC and DAEWOO TFTV93HDT LCD TV – TROUBLESHOOTING – SMPS POWER SUPPLY SCHEMATIC

Daewoo & Palsonic LCD TVs TFTV68HDT TFTV81HDT TFTV93HDT TFTV106HDT SMPS Circuit diagram & Troubleshooting Procedure

GENERAL TROUBLESHOOTING

TV does not response or remote controller does not work.

 Check the power cord to be plugged.

Check the battery of the remote controller.

Sound is discontinuous or broken sometimes.

Check if [SOUND] > [AVC] is [ON].

Set the sound effect into 'F Mono'.

Set the [SOUND] > [DTV Volume] into proper value.

[DTV Volume] is enabled only in digital program.

Picture of digital program is sometimes broken and sound is discontinuous.

Digital program has a little problem because of signal receiving status.

Check if the RF cable is correctly connected.

Ask for the broadcasting station if the RF cable connection has no problem.

Picture of analog program is noisy.

Check the RF cable connection.

Check if [Picture] > [Noise Reduction] is ON.

Change the [Install] > [Programme Setup] > [Fine] value.

Sound is not generated in HDMI mode.

Reconnect HDMI jack.

DVI signal has no sound. Check the output signal of device to be connected to LCD TV.

If you want to use DVI-HDMI In spite of 'Auto Setup', picture size is not completely adapted to the screen.

Check if the input signal is available.

Ensure that the desktop has no black area. 

Some errors (picture position problem) will be occurred according to certain video card. In this case, you should adjust 'Frequency' control.cable, you should also connect audio cable into the LCD TV.

In spite of 'Auto Setup', picture is not clear.

Adjust 'Phase' control.

TFTV68HDT, TFTV81HDT, TFTV93HDT - SMPS CIRCUIT

FEL-42C1 : TFTV106HDT  - SMPS CIRCUIT

SMPS TROUBLESHOOTING

CLICK ON THE PICTURES TO MAGNIFY

HOW TO ENTER SERVICE MODE – SYLVANIA LCD TV 6620LE – SMPS and BACK-LIGHT INVERTER SCHEMATIC

SYLVANIA 6620LE 20” COLOR LCD TELEVISION – Service mode_Power & Back-light Inverter Circuit Diagram _ Initial Data Values _ Software Reset

How to make Service remote control unit
Prepare normal remote control unit. (Part No. N0105UD or N0127UD) Remove 3 Screws from the back lid.

Add J1 (Jumper Wire) to the remote control CBA

How to set up the service mode
1. Use the service remote control unit.
2. Turn the power on. (Use main power on the TV unit.)
3. Press "SLEEP" button on the service remote control unit. Version of micro computer will be displayed on the LCD or display.

INITIAL DATA VALUES

SMPS & BACK-LIGHT INVERTER SCHEMATIC

Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.  If Main Fuse (F601) is blown, check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.  Otherwise it may cause some components in the power supply circuit to fail.

Flicker Adjustment
Adjustment Point: VR201 (LCD Main CBA Unit)

Use service remote control unit
1. Enter the Service mode.

2. Press [2] button on the remote control unit. The following screen appears.
3. If Flicker Adjustment is not fit, the screen become the following.
4. Adjust VR201 so that flash stops.

The following adjustment normally is not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation. 

 White Balance Adjustment

Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

Note: Use service remote control unit
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80%).
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL Dn] button on the service remote control unit and select “C/D” mode.
5-1.When “x” value and “y” value are not within specification, adjust “DB(C/D1)” or “DR(C/D1)”.
Note: “DB(C/D1)” or “DR(C/D1)” must be adjusted within ±10.
5-2.When “x” value and “y” value are not within specification, adjust “DB(C/D2)” or “DR(C/D2)”.
Note: “DB(C/D2)” or “DR(C/D2)” must be adjusted within ±10

HOW TO INITIALIZE THE LCD TELEVISION

1. Turn the power on. (Use main power on the TV unit.)
2. To enter the service mode, press [POWER], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.
- To cancel the service mode, press [POWER] button on the remote control.
3. To initialize the LCD television, press “DISPLAY” button on the remote control unit.
4. Confirm "FF" indication on the upper right of the screen.

Software Reset
To reset software, press [5] button on the remote control unit for at least 5 seconds after pressing [CH RETURN] button on the remote control unit.

Service mode:
1. Use the service remote control unit.
2. Turn the power on. (Use main power on the TV unit.)
3. Press [SLEEP] button on the service remote control unit. Version of micro computer will be displayed on the LCD or display. (Ex: 0004FP-0.47)

CLICK ON THE PICTURES TO MAGNIFY

RCA L37WD23 37 inch LCD TV – Factory Mode – White Balance Adjustment – SMPS schematic

Power supply Circuit diagram_Factory Mode_White balance adjustment_ RCA L37WD23

 White Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.

Select channel 03 to adjust the white balance.

The tolerance of the color coordinates should be less than ± 20.
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 adjust.

PC mode
 In the TV mode adjust volume to zero and press number key 9 > 8 > 7 > 6. It will achieve the factory mode. Select the item of White Balance and press right key to enter it.
In the White Balance you can adjust 8 items.
1-3 items is RO, GO, BO > R, G, B Bias adjust.
4-6 items is RG, GG, BG > R, G, B Gain adjust.
7 item needn’t adjust
8 items is color temperature select: Cool, Normal, and Warm.

Bias (Low luminance) adjustment
1. Set the raster pattern (Black pattern with 1024×768) Input.
2. Adjust the brightness on OSD until chroma 7120 measurement reach the lowest value.

Gain adjustment
 Adjust Cold color-temperature
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>400 cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x =289, y =304, Y>200cd/m2
5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100
6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100
7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100
8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2
9. Switch the chroma-7120 to x, y, Y mode with press “MODE” button to check the color temp is in SPEC. or not.
10. Enter the 8 item to select another color temperature to adjust.

Adjust Normal color-temperature
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>400cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x =299, y =315, Y>200cd/m2
5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100
6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100
7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100
8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2
9. Switch the chroma-7120 to x, y, Y mode with press “MODE” button to check the color temp is in SPEC. or not.
10. Enter the 8 item to select another color temperature to adjust.

Adjust Warm color-temperature
1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>400cd/m2
2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)
3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)
4. The LCD-indicator on chroma-7120 will show x =313, y =324, Y>200cd/m2
5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100
6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100
7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100
8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2
9. Switch the chroma-7120 to x, y, Y mode With press “MODE” button to check the color temp is in SPEC. or not.
10. Enter the 8 item to select another color temperature to adjust.

Switch different source

Press the source key on the remote control to switch different source to adjust the AV, HDMI, CONPONENT 480i and COMPONENT 480p mode.
Press “Exit” button on remote control to quit from factory mode.

SMPS SCHEMATIC & PWB

DISASSEMBLY – Inputting DDC Data _ Inputting HDCP Code - Samsung S22A350H TFT LCD LED monitor

Applicable to Samsung S22A350H _ S23A350H _ S24A350H _ S27A350H

Remove the stand body shown in the figure.

Turn the monitor over and insert your hands into the top of the monitor at the center and separate the front cover in the direction of the arrow as shown in the figure.
Separate the sides of the front cover up to the directed line as shown in the figure.

Remove the LVDS, LAMP wire, FUNCTION cable, and then remove the SHIELD-COVER.

Remove the LCD panel.

Remove the main PCB from the SHIELDHOLDER.

We get the PBA.

D-Sub(15 Pin) Cable > BN39-00244H

Power Cord > 3903-000382

Adapter: (S22A350H, S23A350H, S24A350H) > BN44-00394C.  BN44-00394A

Adapter: (S27A350H) > BN44-00399A

DVI to HDMI Cable > BN39-01353B

HDMI Cable > BN39-00641A

Adjustment

Precautions before a Service Adjustment
1) Check whether the devices for the service adjustment are operating normally.
2) Secure a space that is sufficiently wide for disassembling the monitor.
3) Prepare a soft mat on which the monitor will be disassembled.

Entering Service Mode
Entering: Menu > Brightness 0 >  Contrast 0 >  Hold down the Enter button for five (5) seconds.
Exiting: Power OFF >  Power ON

Basic Service Items to Perform after Replacing a Board
1) Check the PC color adjustment status.
2) Input DDC (input both of Analog and HDMI).
3) Check whether the appropriate MCU code for the model is input.
4) Hard power the monitor off after entering service mode and performing a reset.
4. DDC EDIT Data Input
1) Use when updating the AD board code.
2) Download the WinDDC program, DDC Input program, and Hex and DDC files appropriate to the model through the Quality Control department of Samsung Electronics. Install the jig and input the data, as shown in the figure.

Inputting the DDC Data

Use the DDC Manager MTI-2050 version or later.
1) Click the Open [F5] icon.
2) Select Two EDID .
3) Select one DDC ile,do it two times.
4) Click [O] button.

5) Enter the serial number and then press the Enter button.  When inputting one data , select one EDID at steps 2 .

Check the following options after open the “Easywriter”
Option: Setup ISP tool

LPT Port Offset: 378
ISP Jig type Selection: SAMSUNG
Auto detect
Confirm Change

Click the Load File button.

Select an MCU code file, and then click the Open [O] button.

Click the Auto button.

When programming and verification are complete, hard power the monitor off and then on again.

Inputting the Code  (HDCP)

Run the service.exe file.

Click the HDCP button.

Click the Load HDCP button and select HDCPKEY_NOVATEK.

Inputting the HDCP key is completed.