No Video - Samsung SyncMaster 1000s Service Manual

7 Troubleshooting

7-1-16 No Video

Check signal cable and connection.
Do the IC104 Pins 2, 6 and 11
42
waveform match #42?
Yes
Do the IC104 Pins 29, 32
and 35 output waveform
35
match #35?
Yes
Do the IC105 Pins 4, 6 and 14
36
waveform match #36?
Yes
Is the RGB cathode DC levels
correct?
Yes
Is the G2 voltage output correct?
Yes
Change CRT and adjust monitor.
Done.
7-10
Check some parts around QR101,
No
QR102, QG101, QG102, QB101 and
QB102.
No
Check IC104, SDA/SCL line and +12 V
line.
No
Check +12 V DC line and check and
replace IC105.
Check +195 V DC line.
No
Check and replace IC107, Q112, QR104,
QR105, QG104, QG105, QB104 and QB105.
No
Check G2 wire connection and CRT
Socket board.
WAVEFORMS
3.60 V (IC104, #35)
35
CH1 P-P = 3.60 V CH1 RMS = 2.938 V
47.2 V (IC105, #6)
36
CH1 P-P = 47.2 V CH1 RMS = 49.40 V
1.00 V(IC104, #2)
42
CH1 P-P = 1.00 V CH1 RMS = 2.600 V
SyncMaster 1000s (CGP1607L)