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5-1-16 No Video
Check signal cable and connection.
IC102 Pin 5, 8 and 10
15
inputs are right?
Yes
IC102 Pin 25, 28 and 30
16
outputs are right?
Yes
IC105 Pin 1, 3 and 5
17
outputs are right?
Yes
Cathode DC levels are right?
Yes
G2 voltage is right?
Yes
Change CRT.
Yes
Done.
AP17K*/AP17J*
No
Check the signal cable connection.
No
2
Check I
C bus and +12 V line.
No
Check +12 V, +80 V line.
Check and replace IC105.
Check +80 V line.
No
Check and replace IC104
Check IC102 Pin 19, 20, 21
No
Check G2 wire,
CRT Socket board and FBT.
5 Troubleshooting
WAVEFORMS
1.00 V (IC102,#5, 8, 10)
15
1.00 V (IC102, #25,28,30)
16
20.0 V (IC105, #1, 3, 5)
17
5-9
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