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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
6-2
6-2
TUNER BOARD - LAYOUT DIAGRAM
TUNER ADJUSTMENT TABLE
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter
VARICAP ALIGNMENT FM 87.5 - 108MHz MW
FM/AM-version, 10kHz grid
108MHz 87.5MHz 1700kHz 530kHz 1602kHz 531kHz
L303 check T301 check T301 check
4V �0.2V 0.9V �0.2V
1
3.4V - 3.5V 0.6V - 0.7V 3.6V - 3.7V 0.6V - 0.7V
530 - 1700kHz
FM/MW-version, 9kHz grid
531 - 1602kHz FM IF FM FM RF FM 87.5 - 108MHz 108MHz 87.5MHz AM IF
A
mod=1kHz �f=�22.5kHz
108MHz 87.5MHz
L302
4
MAX
C
MW 450kHz �f=�10kHz VRF = 0.5mV
(as low as possible)
558kHz (or 560kHz)
T301
4
fo symmetric
AM RF MW
FM/MW-version, 9kHz grid
1494kHz 558kHz 1500kHz 560kHz
B
1494kHz 558kHz 1500kHz 560kHz
TC302
max. fo symmetric
ECO6, general with ferrite antenna, 070799
531 - 1602kHz MW
FM/AM-version, 10kHz grid
MW ferrite coil
4
530 - 1700kHz
�f = �30kHz VRF as low as possible
TC302
MW ferrite coil
1) If sensitivity of frequency counter is too low adjust to max. channel separation
2) RC network serves for damping the IF-filter while adjusting the other one.
(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)
Repeat
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