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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...
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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.
ELECTRICAL ADJUSTMENT
PRACTICAL SERVICE FIGURE
Tape speed: Wow & flutter: Take-up torque: F.F torque: REW torque: S/N ratio:
J103 EARPHONE
A MAIN C.B
3000 Hz ± 60 Hz Less than 0.55% (4.8 cm/s) Less than 0.8% (2.4 cm/s) 20 ~ 50 g-cm (FWD) More than 55 g-cm More than 55 g-cm More than 56 dB (DC, PB) More than 26 dB (DC, R/PB) Less than 3.0% (DC, PB) Less than 7.0% (DC, R/PB) Less than 2.0 mV (PB, Vol Max., DC) Less than 16 mV (R/PB, Vol Max., DC) Less than 0.3 mV (PB, Vol Min, DC)
Distortion:
Noise level:
VR202 VR201 PLAYBACK SPEED VR402
Erasing ratio: Test tape
More than 44 dB (1kHz) TTA-100 TTA-150 TTA-160 TTA-330
IC BLOCK DIAGRAM
IC, MM1206XF
1
R/P HEAD
3
2
1. Azimuth Adjustment Settings: � Test tape: TTA-330 � Test point: EARPHONE JACK (J103) � Adjustment location: Azimuth adjustment screw � PAUSE: OFF � VOLUME: Maximum. Method: Play back the test tape, and adjust so that the output (8 kHz) becomes maximum.
3. Tape Speed Adjustment (2.4cm/s) (TP-VS610 only) Settings: � Test tape: TTA-150 or TTA-160 (TAPE CENTER) � Test point: EARPHONE JACK (J103) � Adjustment location: VR402 � PAUSE: OFF � VOLUME: Maximum � PLAYBACK SPEED: Normal (Speed volume center) � REC MODE: Extended Method: Play back the test tape, and adjust for 3000 Hz ±10Hz
2. Tape Speed Adjustment (4.8 cm/s) Settings: � Test tape: TTA-100 (TAPE CENTER) � Test point: EARPHONE JACK (J103) � Adjustment location: VR202 � PAUSE: OFF � VOLUME: Maximum � PLAYBACK SPEED: Normal Method: (Speed volume center) Play back the test tape, and adjust for 3000 Hz ±10Hz
TRANSISTOR ILLUSTRATION
C
B
E 2SC2712 2SC3326 2SC4081 2SC4116 2SC4213 DTC114 RN2304
9
10
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