REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 9 March 2019

SAMSUNG LA32A550P1R - LA37A550P1R - LA40A550P1R - LA46A550P1R - - LA40A650A1R - LA46A650A1R - LA52A650A1R TROUBLE SHOOTING AND SERVICE MODE

SAMSUNG LA32A550P1R - LA37A550P1R - LA40A550P1R - LA46A550P1R - - LA40A650A1R - LA46A650A1R - LA52A650A1R TROUBLE SHOOTING AND SERVICE MODE


SAMSUNG LA32A550P1R - LA37A550P1R - LA40A550P1R - LA46A550P1R - LA40A650A1R - LA46A650A1R - LA52A650A1R 


TROUBLE SHOOTING AND SERVICE MODE 


TROUBLE SHOOTING 
No Power
SYMPTOM
The LEDs on the front panel do not work when connecting the power cord.
The SMPS / IP Board relay does not work when connecting the power cord.
The units appears to be dead.
CHECK POINT
The SMPS / IP Board relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
Check the fuses of each part.
Check the output voltage of SMPS.
Replace the Main Board.
Lamp(Backlight) Off, power indicator LED on? > Check a connection power cable. (Code Number refer to each model’s BOM)
Does proper Stand-By DC A5V appear at C1002? >  Change the Main Power assembly (Code Number refer to each model’s BOM)
Does proper Main DC B12VS, B5V, B12V appear at C2060, C1011, C1008_DE?
Does proper Inverter DC 12V appear at CN1001 in SMPS
Does proper DC A3.3V appear at C1006? > Check IC1002 Change the Main Ass’y (Code Number refer to each model’s BOM)
Does proper DC B1.26VD, MT_ DDRV18, B1.8V, B3.3V, B1.5VA appear at C1037, C1045, C1042, C1024, C1041? > Check IC1019, IC1008, IC1009, IC1005, IC1007 Change the Main Ass’y (Code Number refer to each model’s BOM)
A power is supplied to panel appear at C1025_DE? > Check a other function (No picture part)Replace a LCD Panel (Code Number refer to each model’s BOM)
No Video (Analog PC signal)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINT
Check the PC source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Check the PC source and check the connection of DSUB? > Input an analog PC signal. Check the connected cable.
Does the signal appear at #B9, #B10, #A11, #D12, #C11 (R,G,B,H,V) of IC5004? >  Check CN3009, PC cable. Change the PC cable. Change the main PCB
 Assembly
Does the digital data appear at output of RA5070~RA5075? > Check IC5004Change the main PCB assembly
Does the digital data appear at output of RA6074~RA6076, RA6078~RA6080, R6082_P, R6083_P, R6086_P, R6087_P? > Check IC6001_FBE Change the main PCB assembly
Check the LVDS cable? Replace the LCD panel?
No Video (HDMI - Digital Signal)
 SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINT
Check the HDMI source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Check the HDMI source and check the connection of HDMI cable? > Input an HDMI signal. Check the connected cable.
Does the signal appear at R3220~R3227, R3346~R3453, R3321~R3328? > Check JA3001, JA3003, CN3003_NSIDE, HDMI cable.Change the HDMI cable. Change the main PCB assembly
Does the digital data appear at output of R5094~R5101, R5163, R5164, D5003, D5004, D5006? > Check IC3012 Change the main PCB assembly
Does the digital data appear at output of RA5070~RA5075? > Check IC5004 Change the main PCB assembly
Does the digital data appear at output of RA6074~RA6076, RA6078~RA6080, R6082_P, R6083_P, R6086_P, R6087_P? > Check IC6001_FBE Change the main PCB assembly
Check the LVDS cable? Replace the LCD panel?
No Video (Tuner_CVBS)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINT
Check the Tuner CVBS source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Check the RF source and check the connection of RF cable? >  Input the RF signal. Check the connected cable.
Does the signal appear at TU3001? > Check TU3001. Change the main PCB assembly or tuner.
Does the digital data appear at output of RA5070~RA5075? > Check IC5004 Change the main PCB assembly
Does the digital data appear at output of RA6074~RA6076, RA6078~RA6080, R6082_P, R6083_P, R6086_P, R6087_P? > Check IC6001_FBE Change the main PCB assembly
Check the LVDS cable? Replace the LCD panel?
No Video (Component 1, 2)
SYMPTOM
Audio is normal but no picture is displayed on the screen.
CHECK POINT
Check the Component source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
Does the signal appear at C3028, C3030, C3027, C3064_NT, C3066_NT, C3063_NT? > Check JA3013_NT, JA3016_NT Change the main PCB ass’y
Does the digital data appear at output of RA5070~RA5075? > Check IC5004 Change the main PCB assembly
Does the digital data appear at output of RA6074~RA6076, RA6078~RA6080, R6082_P, R6083_P, R6086_P, R6087_P? > Check IC6001_FBE Change the main PCB assembly
Does the digital data appear at output of RA6074~RA6076, RA6078~RA6080, R6082_P, R6083_P, R6086_P, R6087_P? > Check IC6001_FBE Change the main PCB assembly
Check the LVDS cable? Replace the LCD panel?
No Sound
SYMPTOM
Video is normal but there is no sound.
CHECK POINT
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is not functioning.
Speaker defect..
Does the signal appear at R2002 ~ R2007 (PC, AV(Side AV), COMP1/2, DVI), R5094 ~ R5101 (HDMI)? > Check IC2002 or Side-AV. Change the main PCB ass’y or side-AV assembly
Does the digital data appear at R2041, R2044~R2046? > Check IC5004 Change the main PCB assembly
Does the signal appear  L2001, L2002? > Check IC2004 Change the main PCB assembly.
Entering Factory Mode
To enter ‘Service Mode’ Press the remote -control keys in this sequence :
- If you do not have Factory remote - control
EU/Asia > INFO > MENU > Mute  > Power On
How to Access Service Mode
Using the Customer Remote
Turn the power off and set to stand-by mode
Press the remote buttons in this order; POWER OFF-MUTE-1-8-2-POWER ON to turn the set on.
The set turns on and enters service mode. This may take approximately 20 seconds.
Press the Power button to exit and store data in memory.
- If you fail to enter service mode, repeat steps 1 and 2 above.
Initial SERVICE MODE DISPLAY State
Color Calibration Method (AV)
1) Apply the PAL Lattice (N0. 2) pattern signal to the AV IN 1 port
2) Press the Source key to switch to “AV1” mode
3) Enter Service mode
4) Select “2 WB Adjust” menu.
5) Select the “Calibration” menu
6) Select the “AV Calibration” menu.
7) In “AV Calibration Failure” status, press the “>  ” key to perform Calibration.
8) When Calibration is complete, it returns to the high-level menu.
9) You can see the change of the “AV Calibration” status from Failure to Success.
Color Calibration Method (Component)
1) Apply the 720p Lattice (N0. 6) pattern signal to the Component IN 1 port
2) Press the Source key to switch to “Component1” mode
3) Enter Service mode
4) Select “2 WB Adjust” menu.
5) Select the “Calibration” menu
6) Select the “DTV Calibration” menu.
7) In “DTV Calibration Failure” status, press the “ > ” key to perform Calibration.
8) When Calibration is complete, it returns to the high-level menu.
9) You can see the change of the “DTV Calibration” status from Failure to Success.
Color Calibration Method(PC)
1) Apply the VESA XGA Lattice (N0. 21) pattern signal to the PC IN port
2) Press the Source key to switch to “PC” mode
3) Enter Service mode
4) Select “2 WB Adjust” menu.
5) Select the “Calibration” menu
6) Select the “PC Calibration” menu.
7) In “PC Calibration Failure” status, press the “ > ” key to perform Calibration.
8) When Calibration is complete, it returns to the high-level menu.
9) You can see the change of the “PC Calibration” status from Failure to Success.
Color Calibration Method(HDMI)
1) Apply the 720p Lattice (N0. 6) pattern signal to the HDMI1/DVI IN port
2) Press the Source key to switch to “HDMI1” mode
3) Enter Service mode
4) Select “2 WB Adjust” menu.
5) Select the “Calibration” menu
6) Select the “HDMI Calibration” menu.
7) In “HDMI Calibration Failure” status, press the “>  ” key to perform Calibration.
8) When Calibration is complete, it returns to the high-level menu.
9) You can see the change of the “HDMI Calibration” status from Failure to Success.
Posted By: FRANK at 02:35
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