Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung TV S62B chassis troub_6_292
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Troubleshooting
6. Troubleshooting
6-1 Checkpoints by Error Mode
Power LED: Check that the LED works when turning the Master Switch ON/OFF
LED Indicators: See table 6-2-1 Basic Troubleshooting: LED Diagnosis on the Front Panel.
In case of a power failure or abnormal screen, check the following items.
1) Check that the power cord is correctly connected to a 220V wall outlet.
2) Check that the Master Switch has been pressed.
3) Check that the transmitter is turned on.
4) Check that transmitter device selection is set to TV.
5) Check that the signal cable is properly connected.
6) Check that channel setting has been set.
Samsung Electronics 6-1
Troubleshooting
6-1-1 Basic Approaches for Troubleshooting
Troubleshooting Mechanism :
- The Main Board has Power part which supplies power to Deflection and Feature Box.
- The Feature Box receives all signal inputs,the signal-processed signal is sent to CRT Ass'y.
- Deflection and Focus are controlled by the Deflection Board.
Troubleshooting by Modules
1) Enter Service Mode
(In SET Stand-By Status,if you press "Info""Menu""Mute" and "Power" button in sequence on the remote control, the
screen is turned on and the Service Mode screen appears.)
2) Check if the System Board is out of order.
Press OPTION TEST PATTERN Right direction key:
The COLOR BAR, BLACK pattern and WHITE pattern are displayed on the screen.
If the pattern is not displayed or is displayed abnormally, the DNIe IC (SPD41) or the System Board is out of order.
3) Check if the Power Board, which supplies power to the System Board and the Deflection Board, is out of order.
If you cannot turn the screen on by pressing the POWER ON/OFF button or the screen repeatedly turns on and off when
pressing the POWER ON/Off button, check if the Power Board is out of order. (Refer to the circuit diagram)
4) Check if the Deflection Board is out of order.
When the screen is not properly displayed and the left or right side of the picture is shrunk, or the top or bottom of the screen
is expanded or shrunk, check if the Deflection Board is out of order.
6-2 Samsung Electronics
Troubleshooting
6-1-2 Flow Chart for Malfunction
Does the TV wor k? YES
I s t her e Does t he OSD
YES
somethi ng on menu on t he
NO
the Screen scr een wor k?
I s t he power cord or t he NO
mast er swi tch out of order ?
Check t hat t he cables ar e proper l y
NO
connect ed t o Main Boar d.
Replace t he Feat ur e Box, i f necessar y.
I s t he cabl e connect i ng
t he Pow Boar d and t he
er
Def lect i on Boar d proper l y
connected?
NO
I s a CRT high vo lt age NO Replace t he
been measured? Main Board
NO
I s t he cabl e f rom t he NO
Connect t he cabl e
Main Boar d t o t he CRT
Ass' y proper l y connect ed?
Samsung Electronics 6-3
Troubleshooting
6-2 Troubleshooting Procedures by Error Modes
6-2-1 Basic Troubleshooting: Diagnosis of LED on the Front Panel
: Light is On
: Light is Blinking
: Light is Off
Power Description
This happens when the Master Switch is not pressed or the power cord is disconnected.
This happens when the power cord is connected and the power switch is pressed.
If you cannot set the power switch on by pressing it, check the power switch Ass'y.
If you press the power switch of the transmitter or the channel key on the remote control when in
St-BY status, the screen will be turned on.
If the LED blinks and the screen is not displayed, check the connection between the Power and
the System Board.
6-2-2 Troubleshooting by the Checksum
Diagnosis of trouble by the checksum is neither reliable nor convenient.
You can only use the checksume of the current direct-view TV to determine whether the software is corrupted or not.
The Checksum value is determined according to the version of the software loaded on the set.
Therefore, you can determine whether the software has been properly downloaded, if you know the correct checksum for that
version of the software.
You can check the checksum according in the following order.
Factory Mode Checksum Right Button Calculate Checksum Output Checksum (e.g. 0xab2b)
Checksum Examples
T_COREOAKR1_1010 : checksum = 0xab2b
T_COREOAKR1_1014 : checksum = 0x4faa
6-4 Samsung Electronics
Troubleshooting
6-3 Troubleshooting Procedures by ASS'Y
6-3-1 NO Power
1. Power Board Check
No-Power
AC Voltage Impress
NG FP801S FUSE NG
IC803 #1 CHECK AC FUSE CHANG
CHECK
OK
OK
CHECK HOT NG NG D801S
Change NG IC803 #4 D801S
Materials BLOCK BRIGE DIODE
CHECK OK CHANGE
OK IC803
SPS IC CHANG
F/back Line
NG C815(B+) Voltage OVER Check NG FA801S/FA802S NG Change
Change
Materials check 132V F/B Line FUSE/ Materials
12V Line
OK or Low
NG L L811 NG R820 NG Change
Change Q406 H-OUT TR 12V Line
Open Line Materials
Materials OK
OK OK
Q804 NG Change
Materials
(VCC_5V_C)
OK
F-Box Check
and Change the
Module
B+(132V) Line
F/BACK LINE NG
Change
CHECK Materials No-Power
Repair End
IC804 Q406
IC501S
TU01S
F/BOX
FP801S
POWER CORD
IC601 IC301S IC803S
Samsung Electronics 6-5
Troubleshooting
6-3-2 NO Video
1. when the power is normal
No-Signal
EXT: N o EXT : O k
RF : N o NG
RF : O k RF,VIDEO TU01 IC803 78R09
CEHCK 9V check CHANGE
OK
Video:N o
RF : N o
TU01 NG
IC802 78R05
5V check CHANGE
NG SCART1/SCA
OK
2 CVBSCheck
OK
NG
Cehck A/V TU01 DZ804 TZP33A
Cabile 33V check Change
OK
OPEN Tuer SDA/SCL
PIN OK NG OPEN Tuer SDA/SCL
TU01 SDA/
Check SCL/SDA SCL check PIN Check SCL/SDA NG
NG OK OK
NG
C117 CVBS CHECK Tuner Change
OK
F-Box Module
Change
Repair End
6-6 Samsung Electronics
Troubleshooting
6-3-3 No Sound
1. when the power is normal
No-Signal
EXT : N o EXT : O k
RF : O k RF,EXT-IN RF : N o TU01 NG IC803 78R09
CEHCK 9V check CHANGE
EXT : N o OK
RF : N o
TU01 NG
IC802 78R05
5V check CHANGE
NG SCART1/SCART2
OK
CVBS Check
OK
NG
Cehck A/V TU01 DZ804 TZP33A
Cabile 33V check Change
OK
OPEN Tuer SDA/SCL OK NG OPEN Tuer SDA/SCL
TU01 SDA/
PIN Check SCL/SDA SCL check PIN Check SCL/SDA NG
NG OK OK
Tuner Change
F-Box Module NG F-Box Module
R/L-OUTCheck Change
OK
NG NG Change
AMPB+ Check FA803S CEHCK
Materials
OK OK
AMP CHANGE
Samsung Electronics 6-7
Troubleshooting
6-3-4 No Raster
1. when the H/V is normal
No-Raster
Raster IC501 B+ NG IC501 B+ Line Check
Raster Check and Materials change
CHECK
OK
IC501 NG
Output IC501 TDA6109 change
CHECK
OK
RGB Line Materials
Check and Change
Black Black CRT ASSY Heater Line
FBT Screen VR MAX
CHECK Fusible Resistor
And Screen check
change
Raste
OK
OSDCheck Go to the No-Video check
Flow Chart
NG
FBT 16V/-16V Line
NG Diode and Fusible F-BOX Module
FBT 1 6/ - 1 VCHECK
6 Change
Resistor check.
OK and Change
IC301 4, 5 NG F-BOX Module
V-Sync Check Change
OK
Vertical Block NG F-BOX Module
Materials Check Change
OK
Verticla IC
LA7845 Change
6-8 Samsung Electronics
Troubleshooting
6-4 Troubleshooting by Blocks
6-4-1 Troubleshooting System Boards
1. Tuner Diagnosis
- If no signal is received even though the RF signal from the external aerial is connected to the MAIN Board Tuner, check the
following items.
- Supply Power: 5V, 9V, 33V
- Check for an RF defect: Check the CVBS output
- Check for an AUDIO defect: Check the SiF Signal output
Samsung Electronics 6-9
Troubleshooting
2. External Input Diagnosis
It receives the EXT1/EXT2/signal and consists of monitor output (video and audio).
The signal is input to VSP9402 through the port. If no signal input/output is detected, check the following items.
- Power supply : VSP9402(3.3V,1.8V) , CXA2180(5V)
- Check if the input and output jacks are defective.
6-10 Samsung Electronics
Troubleshooting
3. DNIe (SPD41) Diagnosis
The signal is received from the Audio Processor (MSP3421G) and sound is output at 10W + 10W power.
- Power supply :15V
- Check for input defects : L/R
- Check for output defects : L+, L-, R+, R-
Samsung Electronics 6-11
Troubleshooting
4. STV8237(Audio Processor) Diagnosis
It processes the SIF and SCL 1/2 signal output from the Tuner.
- Power supply : 3.3V,1.8V,9V , 5V
- Check for input defects : SIF, SCL1/2-IN,SCL1/2-OUT
- Check for output defects : SOUND L/R
6-12 Samsung Electronics
Troubleshooting
5. VSP9402 Diagnosis
It receives RF, AV1/2/3 and S-VHS (Y,C) signals and outputs to Y/Pb/Pr of
CXA2180Q, M-OUT and V-OUT through internal switching.
- Power supply :1.8V, 3.3V
- Check for input defects : RF, SCL1/2,S-VHS(Y,C)
- Check for output defects :M-OUT,Y,Pb,Pr,HS1,VS1
Samsung Electronics 6-13
Troubleshooting
6. CXA2180 Diagnosis
The Y/Pb/Pr signal is received from VSP9405B and CXA2151Q and the
signal is output as R/G/B. It also outputs the V/H Drive, E/W and performs
the ABL and EHT operation.
If V-Drive output is not detected, check for an IC defect.
- Power supply : 5V, 9V
- Check for input defects : Y/Pb/Pr, H/V
- Check for output defects : R/G/B, ABL, EW, V/H-DRIVE
6-14 Samsung Electronics
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