Sharp MZ-700 manual ~

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2·2. When extremely low output voltage is encountered

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"1

320V

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Observe waveform between the collector and emitter of Q1

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If Waveform(§)

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R5, RS in failure

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Several volts or more

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R9, C12, C",

Q3 in failure

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Unstable waveform

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PC1, IC21, C25 in failure

Waveform(§)

2·3. When extremely high output voltage is encountered (7 - tOy)

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PC1,Q3,R7,RS,C11 in failure

R21, PC1, IC21, R22, R23 in failure

25