5 Troubleshooting
AP17K*/AP17J*
5-7
5-1-13 High Voltage Failure
IC401 Pin 6 OSC pulse exists?
Q402 Gate driving pulse exists?
Check and replace Q401 and Q423.
Yes
Yes
No
Check and replace IC401
and +12 V line.
No
Q402 Drain pulse exists?
Check and replace
D401, Q403 and L402.
Yes
No
Done
10
3
IC101 Pin 8 input exists and
varies with different patterns?
Check and replace IC101.
Input full white pattern to monitor.
Yes
No
T501 Pin 8 output exists?
Check and replace T501.
Yes
No
IC201 Pin 26 output exists and
varies with different patterns?
Check and replace IC201.
Yes
No
Done
Check CN102.
5-1-14 ABL Failure
11
3
2.00 V (IC401, #6)
CH1 P-P = 2.00 V CH1 RMS = 5.868 V
10
2.00 V (Q402, Gate)
CH1 P-P = 2.00 V CH1 RMS = 7.692V
11
50.0 V (Q402, Drain)
CH1 P-P = 50.0 V CH1 RMS = 73.7V
WAVEFORMS
Summary of Contents for AP17K series
Page 7: ...2 Product Specifications 2 4 AP17K AP17J Memo ...
Page 17: ...4 Alignment and Adjustments 4 8 AP17K AP17J Memo ...
Page 36: ...AP17K AP17J 6 1 6 Exploded View and Parts List ...
Page 37: ...6 Exploded View Parts List 6 2 AP17K AP17J Memo ...
Page 55: ...Memo 7 Electrical Parts List 7 18 AP17K AP17J ...
Page 56: ...8 Block Diagrams AP17K AP17J 8 1 ...
Page 57: ...Memo 8 Block Diagrams 8 2 AP17K AP17J ...
