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Great quality complete service manual! complete parts list and drawings. Thanks!
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Great quality complete service manual! complete parts list and drawings. Thanks!
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Very good quality, prompt response. This website has reasonable prices and wide range of manuals that are hard to find.
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The document was usefull, and it was exactly what I was looking for.
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OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
4-8 Trouble Shooting Chart Microphone not working
No voice from Microphone
GO YES
Check point: the Q503 on power board Observe: check the collector terminal voltage is over+0v7
Solution: replace the transistor
NO
Check point: Q503 on power board Observe: check the collector
YES Solution: Replace Q503
terminal is short circuit to ground
NO NO
Solution: check the +5V supply Circuit replaces any defected components
Check the +5V is presented
YES
Check point: Microphone input Observe: check if the any signal presenting at pin7 of CON601 by
YES
Solution: replace U601 on echo board if no signal output from pin 15
NO NO
Check point: VA+ and VA- on microphone board Observe: heck if the supply
Solution: check the connector between echo board and microphone
voltage is +/-10V
YES
Solution: replace the U401 on microphone board
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