Sharp MZ-700 Service Manual page 26

Waveform
CD
Waveform
CID
Waveform@
"1
320V
-------ov
_ _ _ _ _ ""' l ov
2·2. When extremely low output voltage is encountered
I
If Waveform @
I
R5, RS in failure
Waveform@
Several volts
or more
..LI
----~--~----ov
(
Start
I
Observe waveform
between the collector
and emitter of Q1
I
I
If Waveform@
I
R9, C12, C",
Q3 in failure
Waveform@
Unstable waveform
-
~
\
2·3. When extremely high output voltage is encountered (7 - tOy)
PC1,Q3,R7,RS,C11
in failure
N
25
1
If Waveform(§)
I
PC1, IC21, C25
in failure
Waveform(§)
R21, PC1, IC21, R22,
R23 in failure