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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
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
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