S-W1EX
43
5
6
7
8
5
6
7
8
C
D
F
A
B
E
AA
In a case where the voltage waveform at both ends of C17 is a sawtooth waveform even after all the
above corrections have been made.
It is impossible to repair the ASSY.
Replace the ASSY with new one.
47V Output NG
Voltage is 10-16V.
Is the voltage waveform
of the both ends of C17
18V DC?
Is the voltage waveform at both ends of C17 18V DC?
Voltage is 20V or more.
Check the value of R31 and R32,
and connection of IC31 and PC1.
Check+47V
and +
_12V.
Check Auxiliary Winding Circuit of Transformer T1
Anode voltage at D6
SAW
OK
Yes, DC
OK
Yes
repair
Nothing
repair
Flat
No, Saw Tooth Waveform
No, Saw Tooth Waveform
The switching waveform with 21V peak
No
to 4
to 4
to 5
Is the voltage waveform at both ends
of C17 is a saw tooth waveform of flat
(about 18Vdc) ?
Check solder shorting and open
circuit at the secondary circuit.
Check whether or not the amplifier
section is in failure.
Is the voltage waveform of the both ends of C17 18Vdc ?
Check solder shorting the value of R31
and R32, and connection of IC31 and
PC1.
Replace IC1 and D31
with new ones.
The voltage between No.7 and 8
of T1 has the switching waveform
with 21V peak.
Replace T1 with new one.
Replace R4 with
new one.
Replace IC1, Q1, D7, D5, D8, and D9 with new one.
