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5 Troubleshooting
5-1-5 Invariable H_Size
IC401 Pin 24 voltage varies with
different EW_Out DAC values?
Yes
Q402 Gate output duty varies with
different BPOUT valus?
5-1-6 Abnormal H_Size
IC401 Pin 24 output duty
varies with different
B+ offset DAC values?
Yes
Q408 Collector
6
waveform is right?
Yes
Check components
around D409 and L401.
5-4
No
Check and replace IC401.
No
Check some parts around
Q402 and IC401 Pin 24, 26, 28.
No
Check and replace IC201 and IC401.
No
Check and replace Q405,
Q406, Q407, and Q408.
CONFIDENTIAL
WAVEFORMS
200 V (Q408, Collector)
6
CH1 P-P = 200V
CH1 RMS = 387.2V
AN19L*/AN19J*
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