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Check AC voltage out-
put at connector CN1.
YES
Are
the coils
open?
Check
the output voltage
of the power
supply.
Check diode
D1-D4.
Check if the fuse on
primary
board
is
open.
NO
+36VDC
YES
Replace
the transformer.
Are
D1-D4
normal?
YES
Is the
NO
Replace
j
2
j
Observe the waveform
fuse OK?
the fuse.
at power ON from
CT (pin 3), E1(pin 9),
YES
0.9V_}--7
0.2V/div
NO
Replace defective
Diode.
|
O95 Peace ess
Is the
E1 waveform
:
normal?
IC9@) Voltage Waveform
10 1 secidiv
0.5V/div
Is Vref
Replace IC9.
approx.+2.5VDC?
2.08V_1--
YES
Observe the waveform
at power ON from
the collector of Q3.
IC9 © Voltage Waveform
5 secidiv
Is the
|
NO
=a
waveform
Replace Q3.
58V
|
nennAl
10V/dlv
|
YES
Q3 Collector Voltage Waveform
—-10 sec/dlv
8-30
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