Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung Plasma PS42 C 77 HD chassis F33B Troubleshooting
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Troubleshooting
4. Troubleshooting
4-1 Troubleshooting
4-1-1 First Checklist for Troubleshooting
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 voltage in and out between the SMPS Main Board, between the SMPS X, Y Main Board, and between the
Logic Boards.
Samsung Electronics 4-1
Troubleshooting
4-1-2 Checkpoints by Error Mode
No Power
- 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:
- Check the internal cable connection.
Major Checklist
- Check the fuses.
- Check the output voltage of the SMPS.
- Replace the Main Board.
Troubleshooting
Procedures
Is the AC IN socket connector and No Insert the AC in connector and the
the SMPS CN800 connected? SMPS CN800 connector
Yes
Is the Fuse (F801S) of the SMPS Yes
Power Input Part blown?
Replace Fuse (F801S)
No
SMPS CN801 No
Pin 3 : STB 5V
Pin 2 PS-ON : Check to see if it is 0V
Replace the SMPS
Yes
Replace the Main Board
4-2 Samsung Electronics
Troubleshooting
When the unit is repeatedly turning on and off
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 properly and if
Major Checklist each voltage output is correct.
- If the symptom continues even when SMPS is operated 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.
Troubleshooting
Procedures
Does the symptom continue when No Replace the Y Main Board
connecting the power after removing
CN810 from the SMPS?
Yes
Does the symptom continue when
connecting the power after removing
No
Replace the X Main Board
CN809 from the SMPS?
Yes
Does the symptom continue when No
connecting the power after removing
CN807 from the SMPS?
Replace the Logic Board
Yes
Replace the SMPS
WHEN SEPARATING AND CONNECTING THE CABLES SUCH AS CN810, CN809, CN808, CN807 OF THE
MAIN SMPS, CN4701 OF THE X MAIN BOARD, AND CN5707 OF THE Y MAIN BOARD, A SPARK MAY BE
Caution
GENERATED BY THE ELECTRIC CHARGE OF THE HIGH CAPACITY CAPACITOR. THEREFORE, WAIT
SOME TIME AFTER DISCONNECTING THE POWER CORD FROM THE UNIT.
Samsung Electronics 4-3
Troubleshooting
No Picture (When audio is normal)
Symptom - Audio is normal but no picture is displayed on the screen.
- This may happen when the Main Board is functioning but the X, Y Main Board, Logic Board, or Y Buffer
Boards are not.
Major Checklist
- The output voltage of the Main SMPS.
- This may happen when the LVDS cable connecting the Main Board and the Logic Board is disconnected.
CN810
CN809
CN808
CN807
Troubleshooting
Procedures
Are the Vs and Va voltages normal after No Replace the SMPS
removing all cables from the SMPS?
(CN810, CN809, CN808, CN807)
Yes
No
Did problem improve? Replace the Y Main Board
Yes
No
Did problem improve? Replace the X Main Board
Yes
No
Did problem improve? Replace the Logic Board
Yes
No
Did problem improve? Replace the Y Scan Board
WHEN SEPARATING AND CONNECTING THE CABLES SUCH AS CN810, CN809, CN808, CN807 OF THE
MAIN SMPS, CN4701 OF THE X MAIN BOARD, AND CN5707 OF THE Y MAIN BOARD, A SPARK MAY BE
Caution
GENERATED BY THE ELECTRIC CHARGE OF THE HIGH CAPACITY CAPACITOR. THEREFORE, WAIT
SOME TIME AFTER DISCONNECTING THE POWER CORD FROM THE UNIT.
4-4 Samsung Electronics
Troubleshooting
No Sound
Symptom - Video is normal but there is no sound.
- When the speaker connectors are disconnected or damaged.
Major Checklist - When the sound processing part of the Main Board is not functioning.
- Speaker defect.
Troubleshooting
Procedures
Is the cable connection between the No
Main Board and the speaker
properly connected?
Connect the cable properly or
replace the cable, if necessary.
Yes
Is the output voltage of SMPS normal?
(CN801 #13)
No
Replace the SMPS
Yes
Is the speaker output terminal No
of the Main Board normal? Replace the Main Board
Yes
Replace the Speaker
Samsung Electronics 4-5
Troubleshooting
No Video
Symptom - A normal/cable network analog broadcast screen is blank or abnormal but OSD is OK.
- Check the antenna connection settings (Air: NTSC / ATSC, Cable: NTSC)
Major Checklist - Check the CVBS cable connection.
- Check the power input of the Main board.
Troubleshooting
Procedures
Is the antenna connection setting No
properly configured? Configure properly
Yes
No
Check CN1101 pin2 for +33V Replace the SMPS
Yes
Replace the Main Board
4-6 Samsung Electronics
Troubleshooting
SMPS Troubleshooting
Power ON
Abnormal
STD_5V Check the ICB802, DB864, FB801, F801S
Normal PS-ON
Abnormal
VA Check the SUB2, QX801,QX802
Check the
Abnormal 5.3V : ICX808, QX806
Multi 12V : ICX803
VG : ICX805
18Vamp : ICX804
Normal VS-ON
Abnormal
VS Check the SUB1,QS801,QS802
Normal
Check the Other board (Image Board or Driver Board) or Cable.
Samsung Electronics 4-7
Troubleshooting
Drive Board Troubleshooting
1) Troubleshooting Summary
Condition Name Description Related Board
No Voltage Output Operating Voltage don't exist PSU
No Display Operating Voltage exist, but an Image doesn't exist on screen Y-MAIN, X-MAIN, Logic Main, Cable
Abnormal Display Abnormal Image (not open or short) is no screen Y-MAIN, X-MAIN, Logic Main
Sustain Open Some horizontal lines don't exist on screen Scan Buffer, FPC of X/Y
Sustain Short Some horizontal lines appear to be linked on screen Scan Buffer, FPC of X/Y
Address Open Some vertical lines don't exist on screen Logic Main, Logic Buffer, TCP
Address Short Some vertical lines appear to be linked on screen Logic Main, Logic Buffer, TCP
4-8 Samsung Electronics
Troubleshooting
2) Troubleshooting Procedure in Abnormal Conditions
No Display
No Display is related with Y-MAIN, X-MAIN, Logic Main and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.
No Display
[ Logic Main ] [ Y-MAIN ] [ X-MAIN ]
LED Blinks Check necessary points Check necessary points
[ Logic Main ]
Check if power is supplied
( 5V, 3.3V )
YES NO
Check the LED Check the
operation power connectivity
YES NO
Check if internal is Check the Check the FUSE
Default Black MICOM operation
Check the
Check if any address Check the ASIC input voltage
data output is detected Control Signal output
If the input voltage is
Check if the data abnormal, replace the
and control signals PSU and check it
between DDR & ASIC again as this indicates
are normal a PSU output error
[ Y-MAIN ] [ X-MAIN ]
Check several points Check several points
F5001 for VDD OPEN F4001 for VCC OPEN
F5002 for Vs F4002 for Vs
FUSE Replace the Board FUSE Replace the Board
F5004 for VCC F4004 for VDD
F5005 for OUT_L F4005 for Ve
OK OK
Q4002~Q4003
Q5009~Q5021 SHORT SHORT
FET/ Q4011~Q4016 FET/
D5005, D5007 Replace the Board Replace the Board
DIODE D4004 DIODE
D5008
D4006~D4008
OK OK
Y-MAIN X-MAIN
Normal State Normal State
Samsung Electronics 4-9
Troubleshooting
Abnormal Display(Abnormal Image is on Screen.(except abnormality in Sustain or Address))
Abnormal Display is related with Y-MAIN, X-MAIN, Logic Main and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.
Abnormal
Display
[ Logic Main ]
[ Y-MAIN ] [ X-MAIN ]
Observation of
Check necessary points Check necessary points
abnormal display
[ Logic Main ]
LED Blinks
( action of Vsync )
Regular NO
Logic Main
abnormal
Normal State
pattern
YES
Replace the Board Replace Panel
[ Y-MAIN ] [ X-MAIN ]
Check several points Check several points
F5001 for VDD OPEN F4001 for VCC OPEN
F5002 for Vs F4002 for Vs
FUSE Replace the Board FUSE Replace the Board
F5004 for VCC F4004 for VDD
F5005 for OUT_L F4005 for Ve
OK OK
SHORT SHORT
Q4002~Q4003
Q5009~Q5021 FET Replace the Board FET Replace the Board
Q4011~Q4016
OK OK
Y-MAIN X-MAIN
Normal State Normal State
4-10 Samsung Electronics
Troubleshooting
Sustain Open (some horizontal lines don't exist on screen)
[ Y-FPC ]
Sustain Open
NG
After Changing Y-buffer, Replace the Panel
recheck the status There is a defect on the FPC
OK
Done
(Defect is from Y-buffer)
Sustain Short (some horizontal lines appear to be linked on Video)
[ Y-FPC ]
Sustain Short
(Discharging in unwanted Scan line)
NG
After Changing Y-buffer, Replace the Panel
recheck the status There is a defect on the FPC
OK
Done
(Defect is from Y-buffer)
Samsung Electronics 4-11
Troubleshooting
Address Open, Short
Address Open and Short is related with Logic Main, Logic Buffer, FFC, TCP film and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.
[ Logic Main ]
Address Open/Short
Check the LED operation
LED2011 : blink
LED2010 : on
NG NG
Check if the internal mode Check the check the voltage of
screen is normal Video Board C2901, C2902, C2903 is 1.25V
OK OK
OK
NG
Reload the data onto the
MICOM and recheck it
Check if a specific TCP Block check the voltage of
screen is displayed abnormally U2650 pin1 is 3.3V
Check if there is an open or
short circuit on the Buffer Board
and the Logic Main address
data output section.
Check the FFC connection status
OK
NG NG
Check the detailed waveform Replace Logic Main /
and control the signal waveform Address Buffer (E or F) /
FFC
NG
OK
DONE
Replace the Panel
4-12 Samsung Electronics
Troubleshooting
4-1-3 Faults and Corrective Actions
Symptom Related Image Causes and Countermeasures
A blank vertical cell (block) Address buffer defect
appears on the screen. - Replace the corresponding upper/lower
buffers (E, F)
COF defect (burnt)
- Replace the module
A green screen appears when The Scale is not reseting
the TV is turned on. - Replace the Main board
The OSD box appears but there Incorrect program version
is no text. - Check the version of each program
- Replace the Main board
A blank upper (or lower) block Upper/Lower Y Buffer defect
appears on the screen. - Replace the corresponding upper/lower
buffers (E, F)
Samsung Electronics 4-13
Troubleshooting
Symptom Related Image Causes and Countermeasures
Either the main or sub picture Replace the Main board
does not appear.
A vertical green line appears on The SMPS voltage is incorrect
the screen. - Adjust the SMPS voltage according to
the voltage printed on the module label
Dim screen (blurred in red) X-Main board defect
- Replace the X-Main board
A blank screen appears - Replace the Y-Main board
4-14 Samsung Electronics
Troubleshooting
4-1-4 Troubleshooting Procedures by assembly
No Assembly Major Symptoms
1 SMPS-PDP TV No power, Blank screen, the Relay repeats On and Off.
2 ASSY PDP MODULE P-X-MAIN Blank screen
3 ASSY PDP MODULE P-Y-MAIN Blank screen
4 ASSY PDP MODULE P-LOGIC MAIN Blank screen, Screen noise
5 ASSY PDP MODULE P-Y-MAIN SCAN BUFFER Row Bar screen is blank
6 ASSY PDP MODULE P-ADDRESS E BUFFER Corresponding Buffer Board block screen is blank.
7 ASSY PDP MODULE P-ADDRESS F BUFFER Corresponding Buffer Board block screen is blank.
8 ASSY PCB MISC-MAIN No Power, Abnormal screen for each input source, PIP screen trouble, Sound trouble
9 ASSY BOARD P-FUNCTION The side function key does not work properly
10 ASSY BOARD P-POWER&IR The remote control does not work properly, the LED does not work properly.
Samsung Electronics 4-15
Troubleshooting
4-2 Adjustment
4-2-1 Service Instruction
Before Performing After Sales Services
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.
Service adjustment item after replacement of Board
PDP Option of Factory Mode set the Factory Data Type item as the suitable value of relevant model.
Adjust Calibration of Factory Mode for each mode.
Adjust White Balance of Factory Mode.
Write down the value of HDMI White Balance of Factory Mode before replacing Board.
PDP Option of Factory Mode set the Factory Data Type item as the suitable value of relevant model.
Set the value of HDMI White Balance with the value written down before.
4-16 Samsung Electronics
Troubleshooting
4-2-2 How to Access Service Mode
1. General Remote
To Enter: POWER OFF INFO MENU MUTE POWER ON
(Interval between key strokes: less than 3 sec)
To Exit: POWER OFF POWER ON
2. Factory Remote
To Enter: POWER ON INFO FACTORY Key
(Interval between key strokes: less than 3 sec)
To Exit: POWER OFF POWER ON
Press the Factory key twice with a key stroke interval of more than 1 second (Pressing once enters Aging Mode)
3. Settings when entering Factory mode
- Sharp Screen (Dynamic), Color Tone (Cool1), Factory (Dynamic CE Off)
4. Adjustment Procedures
- Channel Key : Select an item.
- Volume Key : Adjust the value up or down.
- MENU Key : Save the changes to the EEPROM and return to the higher-level mode.
- 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
Panel ON time(Hour) 00014 L24E_DS DTV
1. Calibration 7. YC Delay
2. Option Table (Service) 8. Adjust
3. White Balance 9. Bus Stop
4. MST68981 10. W/B MOVIE
5. Option Block 11. Checksum
6. SOUND 12. Reset
13. Spread Spectrum
T-LIL2PEUMD-XXXX
Month/ Day/ Year
Hour/ Min/ Sec
The version of the firmware displayed at the bottom of the screen may differ and the firmware is subject to change for the
improvement of product functions.
If you have adjusted the settings in Service Mode, you have to reset the product.
Samsung Electronics 4-17
Troubleshooting
4-2-3 Factory Data The underlined are items applied during the service adjustment. None of the others should be adjusted.
1. Calibration
Item Data
AV Calibration Success
Comp Calibration Success
PC Calibration Success
HDMI Calibration Success
2. Option Table(Service)
Item PDP 42" PDP 50" Option index
Ready OFF OFF ON/OFF
Inch Option 42" 50" 42"/50"
Model Option Lily Lily Call / Lily / Brod Plus / Jasmine
Anynet+ OFF ON / OFF
Auto Power ON ON / OFF
Nordic ON ON / OFF
LNA Menu OFF ON / OFF
TTX On/Off ON ON / OFF
TTX List FLOF FLOF/List
Carrier Mute OFF ON / OFF
High Devi OFF ON / OFF
Volume Curve Small Small / Large
Hotplug ON ON / OFF
HotplugCtrI ON ON / OFF
HotplugDelay 12 0~63
Hotel Option OFF ON / OFF
Shop Mode OFF ON / OFF
Color Space ON ON / OFF
PC Ident ON ON / OFF
Language English English / German
Ch.Table SUWON SUWON / SESK / SEH / TTSEC
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