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The manual is useful for trouble shooting for an old instrument. It saved money,and let me enjoy DIY.
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Perfect source of information for replacing the HDD and performing general diagnostics.
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Perfect source of information for replacing the HDD and performing general diagnostics.
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Very good scanned copies. Quick response and reasonable price. Thanks for service!
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Good. Good. Good. Good. Good. Good. Good. Good. Good. Good. Good. Good. Good. Good.
7. The voice of the caller cannot be heard (incoming call).
Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected
OK
The 1 kHz, -20 dBm sine waveform is applied to TELline of the base, can the 1 kHz sine waveform from the Q5 collector be fed?
NG
Check the base TEL-line circuit and REPLAY control circuit.
OK
Check whether there is the 1 kHz sine waveform at pin 37 of IC 7.
NG
Check Q5 and its peripheral circuit.
OK
Check whether there is the 1 kHz sine waveform at pin 46 of IC604.
NG
Check IC604 and its peripheral circuit.
OK
Check whether there is the 1 kHz sine waveform at the collector of Q614 and the emitter of Q615.
NG
Check Q614 and Q615.
OK
Check SP801.
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