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Plug in Power Cord


ON Check OFF




Samsung Electronics
LED lamp
5-1 No Power
Abnormal Check Normal Check
MICOM IIC #5, #6 IC901 MICOM
Input Voltage Normal
5. Troubleshooting



Abnormal
Check and Replace
Check the MICOM
Level Shifter Q909, Q910 Check Check Normal
Output(If 2N7000 Output has the DC Normal Abnormal IC903 3.3V Regulator Check and Replace
the MICOM Power #59
Component over 0.7V, it is broken) With Remote Controller Input Voltage IC903

Normal Abnormal Normal Replace Abnormal
the MICOM
Check Check Abnormal Replace
Abnormal Replace Check Abnormal D801 and D811
MICOM Replace Q908 D801 or D811
IIC #2, #3 Q909, Q910 Q908
Normal
Normal Normal
Check Check Normal
Replace Abnormal IC804 Input Voltage Check and Replace
IC902 EEPROM EEPROM(IC902) Check Replace IC804
IC802, IC803 IC802, IC803
Normal Abnormal
Normal
Check Normal Check and Replace
Check IC201S Check Abnormal R828 and D805
Replace R828 or D805
IC201S VDP
H-OUT #50 IC201S
Abnormal
Normal
Check
IC801S and FP801S
Check Abnormal Replace
Q401 H-TR Q401

Normal

Check Abnormal Check
135V Line PC801S, IC801S

Normal

Replace
FBT




Note : When you check whether any component is normal, you must let the output pin be open in order not to be affected by the side of output.




5-1
Troubleshooting
5-2
Troubleshooting


5-2 No Picture



No Picture, but sound is
in normal operation



Turn the VR of FBT, higher screen
Normal voltage and Check the Deflection Abnormal
is in Normal Operation
(If the deflection is in operation,
flyback signal is appeared)



Normal Check Abnormal Normal Check Abnormal
CRT PCB RK, BK, GK IC201S #31



Check Abnormal Check Abnormal
HIC202, HIC203, Abnormal Abnormal
Heater Voltage Check 8V Check DZ202
HIC204 Output

Normal Check Abnormal Normal Normal
Check CRT and FBT IC201S #63 Check Replace
or #59 IC803 DZ202
Check CRT and FBT Normal
Normal
Check Replace
Replace IC201S IC301 IC201S

Check
200V, 16.5V Line Check
Tuner CVBS Output




Samsung Electronics
Troubleshooting


5-3 No Sound



No Sound, but Picture is
in normal operation



Normal Check the CN602 Abnormal
Connection and Signal




Check the Speaker Normal Check Abnormal
Wire Connection 14V Line


Check Check
IC602 #7 Abnormal FA803S
(If the pin is in low state,
Sound is mute)

Normal
Check
D816, Q906

Check Abnormal
IC601 #24, #25

Normal
Replace
IC602

Check
IC601 Input Abnormal
Voltages (5V,8V)

Normal
Check
the coils around IC601

Check Abnormal
IC601 Input Signal

Normal


Replace Check
IC601 the Tuner




Samsung Electronics 5-3
MEMO




5-4 Samsung Electronics