5 Troubleshooting
5-4
AP17K*/AP17J*
5-1-5 H_Lin. Failure
IC201 Pin 21 voltage varies with
different H_Lin. DAC values?
IC603 Pin 9 voltage varies with
different H_Lin. DAC values?
Check +13V, Coil_5V line.
Check some parts around IC603.
Check Q412, Q413 and T402.
Yes
Yes
No
Replace IC201.
No
5-1-6 Invariable H_Size
IC401 Pin 6 voltage varies with
different B_Out DAC values?
Q402 Gate output duty varies with
different B_Out DAC values?
Check some parts around Q402,
IC401 Pin 3 ~ 6.
Yes
No
Check and replace IC401.
No
5-1-7 Abnormal H_Size
IC401 Pin 11 output duty
varies with different B+ offset
DAC values?
Q404 Collector waveform is
right?
Check and replace Q405,
Q406, Q407, and Q408.
Check some parts
around D409 and L401.
Yes
Yes
No
Check and replace IC201.
No
6
6
200 V (Q404, Collector)
CH1 P-P = 200V CH1 RMS = 387.2V
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 ...