Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung Plasma PS50C7000 chassis F76A f76a-p-c7xxx-4-troub

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f76a-p-c7xxx-4-troub

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Troubleshooting

4.Troubleshooting
4-1 CheckpointsbyErrorMode

4-1-1 FirstChecklistforTroubleshooting
1. Check the various cable connections first.
- Check to see if there is a burnt or damaged cable.
- Check to see if there is a disconnected or loose cable connection.
- Check to see if the cables are connected according to the connection diagram.

2. Check the power input to the Main Board.

3. Check the following voltages;
- SMPS to the Main Board
- SMPS to the X Main Board
- SMPS to the Y Main Board
- SMPS to the Logic Board

Samsung Electronics 4-1
Troubleshooting

4-1-2 CheckpointsbyErrorMode

NoPower

- The LEDs on the front panel do not work when connecting the power cord.
Symptom - The SMPS relay does not work when connecting the power cord.
- The unit appears to be dead.

The SMPS 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:
Major
- Check the internal cable connection.
Checklist
- Check the fuses.
- Check the output voltages of the SMPS.
- Replace the Main Board.

START

Is the AC power No Insert the power cord Yes
Problem Solved?
cord connected? and retest.

Yes No

No Insert the connector Yes
Is the ac inlet (CN800S) Problem Solved?
connected? and retest.

Yes No

Are fuses F801S, No Replace the fuse(s) Yes
Problem Solved?
FS802S open? and retest.

Yes No

A

B

4-2 Samsung Electronics
Troubleshooting

A B

On CN801 Pin 16 No Replace the SMPS and Yes
is there 5V STBY? Problem Solved?
retest.

Yes No

Replace the Main
Board and retest.

END

Samsung Electronics 4-3
Troubleshooting

Whentheunitisrepeatedlyturningonandoff

Symptom The SMPS relay is repeatedly turning on and off.

In general, the SMPS relay repeatedly turns on and off by the protection function due to a defect
on a board connected to the SMPS.
- Disconnect all cables from the SMPS, operate the SMPS alone and check if the SMPS works
Major
properly and if each voltage output is correct.
Checklist
- If the symptom continues even when SMPS is operating alone, replace the SMPS.
- If the symptom is not observed when operating the SMPS alone, find any defective
assemblies by connecting the cables one by one.

When separating and connecting the cables such as SMPS and X-Main Board, Y-Main Board
Caution a spark may be generated by the electric charge of the high capacity capacitor. Therefore, wait
some time after disconnecting the power cord from the unit.

START

Check the Va and Vs
voltages on the power
supply.

No Adjust the voltages to Yes
Do the voltages match
match the panel sticker Problem Solved?
the panel sticker?
and retest.

Yes No

Replace the Main
Board and retest.

Yes
Problem Solved?

No

C

D

4-4 Samsung Electronics
Troubleshooting

C D

Turn the unit off, wait
for a short time.
Unplug the X and Y
main boards from the
SMPS and then turn
the unit on.

No Replace the SMPS and Yes
Does the SMPS stay on? Problem Solved?
retest.

Yes No

Turn the unit off and
wait a short time.
Connect only the Y
main pcb then try
turning the unit on.

No Replace the Y Main Does the TV have Yes
Does the unit stay on?
Board and retest. normal operation?

Yes No

Replace the X Main
Board and retest.

E

F

Samsung Electronics 4-5
Troubleshooting

E F

Yes
Problem Solved?

No

Replace the Logic
Board.

Yes
Problem Solved?

No

Replace the panel.

END

4-6 Samsung Electronics
Troubleshooting

NoSound

Symptom Video is normal but there is no sound.

- When the speaker connectors are disconnected or damaged.
Major
- When the sound processing part of the Main Board is not functioning.
Checklist
- Speaker defect.

START

Is the
speaker connection made No Make the connection Yes
Did the problem improve?
on the Main Board? and retest.
(CN2001)

No
Yes

Do pin 1, 3 and 5 on No Replace the SMPS and Yes
connector CN801 Did the problem improve?
retest.
have 12V?

No
Yes

Is the speaker No Yes
Replace the Main
output terminal on the Main Did the problem improve?
Board.
Board normal?

No
Yes

Replace the speaker.

END

Samsung Electronics 4-7
Troubleshooting

When3Dglassseemstohaveatrouble

Use your mobile phone's camera function for
illuminating in front of 3D emitter

IF the 3D emitter does not blink TV has a problem.
(3D emitter or Main Board is bad)

Where 3D emitter locates

IF the 3D glass operates only
right in front of the 3D emitter
3D emitter is bad
IF the 3D glass does not
Power on the 3D glass right in front of the operates at all
3D glass is bad
3D emitter
IF the 3D glass operates well
regardless of the distance No problem both 3D emitter and
3D glass

4-8 Samsung Electronics
Troubleshooting

4-1-3 FaultsandCorrectiveActions

Symptom RelatedImage CausesandCountermeasures

Address buffer defect
A blank vertical cell - Replace the corresponding
(block) appears on the upper/lower buffers (E, F or G)
screen. COF defect (burnt)
- Replace the module

A green screen appears
The Scale is not reseting
when the TV is turned
- Replace the Main board
on.

Incorrect program version
The OSD box appears
- Check the version of each program
but there is no text.
- Replace the Main board

Upper/Lower Y Buffer defect
A blank upper (or lower)
- Replace the corresponding upper/
block appears on the
lower buffers
screen.

Samsung Electronics 4-9
Troubleshooting

Symptom RelatedImage CausesandCountermeasures

Either the main or
sub picture does not Replace the Main board
appear.

The SMPS voltage is incorrect
A vertical green line - Adjust the SMPS voltage according
appears on the screen. to the voltage printed on the module
label

X-Main board defect
Dim screen
- Replace the X-Main board
(blurred in red)

4-10 Samsung Electronics
Troubleshooting

4-1-4 TroubleshootingProceduresbyassembly
If Major Symptoms is happened, Check Assembly refer to table as follow.
50"PDP
Assembly MajorSymptoms

SMPS-PDP TV No power, Blank screen, the Relay repeats On and Off

ASSY PDP P-X-MAIN BOARD Blank screen

ASSY PDP P-Y-MAIN BOARD Blank screen

ASSY PDP P-LOGIC MAIN BOARD Blank screen, Screen noise

ASSY PDP P-X-MAIN BUFFER BOARD Upper screen is blank

ASSY PDP P-Y-MAIN BUFFER BOARD Lower screen is blank

ASSY PDP P-E-BUFFER BOARD Corresponding Buffer Board block screen is blank

ASSY PDP P-F-BUFFER BOARD Corresponding Buffer Board block screen is blank

No Power, Abnormal screen for each input source, PIP screen
ASSY PCB MISC-MAIN
trouble, Sound trouble

The function key does not work properly.
ASSY BOARD P-TOUCH FUNCTION&IR The remote control does not work properly, the LED does not
work properly.

ASSY BOARD P-3D EMITTER The 3D mode does not work properly.

Samsung Electronics 4-11
Troubleshooting

58"/63"PDP
Assembly MajorSymptoms

SMPS-PDP TV No power, Blank screen, the Relay repeats On and Off

ASSY PDP P-X-MAIN BOARD Blank screen

ASSY PDP P-Y-MAIN BOARD Blank screen

ASSY PDP P-LOGIC MAIN BOARD Blank screen, Screen noise

ASSY PDP P-Y SCAN UPPER BOARD Blank screen

ASSY PDP P-Y SCAN LOWER BOARD Blank screen

ASSY PDP P-X-MAIN BUFFER BOARD Blank screen

ASSY PDP P-E-BUFFER BOARD Corresponding Buffer Board block screen is blank

ASSY PDP P-F-BUFFER BOARD Corresponding Buffer Board block screen is blank

ASSY PDP P-G-BUFFER BOARD Corresponding Buffer Board block screen is blank

No Power, Abnormal screen for each input source, PIP screen
ASSY PCB MISC-MAIN
trouble, Sound trouble

The function key does not work properly.
ASSY BOARD P-TOUCH FUNCTION&IR The remote control does not work properly, the LED does not
work properly.

ASSY BOARD P-3D EMITTER The 3D mode does not work properly.

4-12 Samsung Electronics
Troubleshooting

4-2 Adjustment

4-2-1 ServiceInstruction

Beforeperformingservice
1. Check if the measurement and test equipment is working properly.

2. Secure sufficient work space for disassembling the product.

3. Prepare a soft pad for disassembling the product.

Serviceadjustmentafterboardreplacement

1. PDPOptionofFactoryModesettheFactoryDataTypeitemasthesuitablevalueofrelevantmodel.

2. Adjust Calibration of Factory Mode for each mode.

3. Adjust White Balance of Factory Mode.

1. Write down the value of HDMI White Balance of Factory Mode before replacing Board.

2. PDPOptionofFactoryModesettheFactoryDataTypeitemasthesuitablevalueofrelevantmodel.

3. Set the value of HDMI White Balance with the value written down before.

Samsung Electronics 4-13
Troubleshooting

4-2-2 HowtoAccessServiceMode

1. General Remote

To Enter : POWEROFF INFO MENU MUTE POWERON

To Exit : POWEROFF POWERON

2. Factory Remote

To Enter : POWERON INFO FactoryKey (Interval between key strokes: less than 3 sec)

To Exit : Press the Factory key twice. (Pressing once enters Aging Mode)

3. Settings when entering Factory mode
- Sharp Screen (Dynamic), Color Tone (Cool1), Factory (Dynamic CE Off)

4. Adjustment Procedures
- ChannelKey:Selectanitem.
- VolumeKey:Adjustthevalueupordown.
- MENUKey:SavethechangestotheEEPROMandreturntothehigher-levelmode.
- Using the Numeric (0~9) keys, you can select a channel.
- Using the SOURCE key, you can switch AV modes.

5. Initial SERVICE MODE DISPLAY State

Option T-VALDEUC

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