Samsung TXK 3276, Service Manual

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Troubleshooting
Samsung Electronics 5-1
5. Troubleshooting
5-1 No Power
Check
LED lamp
Abnormal Abnormal Abnormal Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Plug in Power Cord
Check
MICOM IIC #5, #6
Check
IC901 MICOM
Input Voltage
Check
the MICOM Power #59
With Remote Controller
Check
Level Shifter Q909, Q910
Output(If 2N7000 Output has the DC
Component over 0.7V, it is broken)
Check
MICOM
IIC #2, #3
Check
IC902 EEPROM
Replace
Q909, Q910
Replace
Q908
Replace
the MICOM
Check IC201S
Replace
EEPROM(IC902)
Replace Q908
Abnormal
Abnormal
Abnormal Abnormal Normal
Normal Normal
Abnormal
Check and Replace
IC903
Replace
D801 or D811
Check and Replace
IC804
Check and Replace
R828 or D805
Check
IC201S VDP
H-OUT #50
Check
Q401 H-TR
Check
135V Line
Check
IC802, IC803
Replace
IC802, IC803
Replace
IC201S
Replace
Q401
Abnormal
Check
PC801S, IC801S
Replace
FBT
Normal Normal
Normal
Normal
Normal Normal Normal Normal Normal Normal
Normal
ON
Check and Replace
the MICOM
Check
IC903 3.3V Regulator
Input Voltage
Check
D801 and D811
Check
IC804 Input Voltage
Check
R828 and D805
Check
IC801S and FP801S
OFF
Normal
Normal
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 s
ide of output.