Aiwa TP-VS640YH1 Service Manual page 6

IC BLOCK DIAGRAM
IC, LA4168M
IC, MM1336DF
7
ELECTRICAL ADJUSTMENT
A MAIN C.B
IC501
1
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
J103
EARPHONE
IC101
VR201
PLAYBACK
SPEED
VR202
2
R/P HEAD
8