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.
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.
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
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 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 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.
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.
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..
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
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
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)
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)
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)
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.
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.
