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OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
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Super Anleitung. Ordentliche Auflösung. Das ganze noch in Deutsch wäre zu schön. Alle Datenblätter sind sauber Kopiert und alle Leitungswege sind sauber ausgeführt
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Thanks God for the internet and thanks for the service like this - proffessional solution on time.
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About the service it's very fast and reliable. About the manual the quality is high enough to read even the tiniest details on the wiring diagrams so you can't ask much more than that, let it alone for a manual of a product from 20 years ago. Thank you, very satisfied.
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The downloaded quality was as good as the orignial
3-3. SERVO SYSCON CIRCUIT B. A.
Playback picture is not good. YES Noise appears on the screen on the whole. YES Are SW pulse and HA SW applied to PreAmp circuit? NO Noise appears although change cassette tape. YES Check and re-adjust the Path of Deck. YES Is Enve.wavefrom supplied to pin 4 of PT01 YES NO NO Check D.PG input and connector between deck and main PCB. Noise shakes up and down on the screen. YES NO Check pattern NO Check flow A Playback picture is not good. YES
Noise appears although adjusting tracking. YES
Is SW pulse obtained from pin 16 of IC601?
YES
Is CTL pulse applied to pin 73 of IC601.
NO
CTL HEAD height is normal and there is not dust.
NO
Adjust the HEAD height and remove dust.
Check video circuit.
Check connector, Head Amp and Head dust.
NO
Change head
C.
YES YES Check circuit adjacent to IC601. Auto stop during playback. YES Check R668, R669 C508, C509. Is Reel pulse applied to pin 5 and 6 of IC601? YES The voltage of pin 91 of IC601 is not changed. YES NO Check R518 and C511. Is D.FG applied to pin 67 of IC601 YES NO Check connector and D.FG circuits. NO Check reel sensor.
Is CTL pulse input to pin 71 and 72 of IC601
NO
YES
Check IC601
Check IC601.
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