Aiwa TP-VS640YH1, Service Manual, Page: 6 / 12

8 7
IC BLOCK DIAGRAM ELECTRICAL ADJUSTMENT
R/P HEAD
VR202
A MAIN C.B
J103
EARPHONE
VR201
PLAYBACK
SPEED
2
1
IC101
IC501
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.
2. Tape Speed Adjustment
Settings: • Test tape: TTA-100 (TAPE CENTER)
• Test point: EARPHONE JACK (J103)
• Adjustment location: VR202
• PAUSE: OFF
• VOLUME: Maximum
• PLAYBACK SPEED: Normal
(Speed volume center)
Method: Play back the test tape, and adjust for 3000 Hz
±
10Hz
IC, LA4168M
IC, MM1336DF