Practical Service Figure - Aiwa M-185 Service Manual

ADJUSTMENT
A MAIN C.B (BOTTOM VIEW)
SFR1
(2.4cm)
SFR3 (1.2cm)
J4
TAPE SPEED
DC3V
1.2
2
RPH
1
1. Head Azimuth Adjustment
Setting: • Test tape: TTS-930
• Tape speed: 2.4 cm
• Adjustment point: Head Azimuth Adjustment screw
Method: Playback the 5 kHz signal of the test tape (TTS-930)
and adjust screw so that the output becomes maxi-
mum.
2. Tape Speed Adjustment (2.4cm)
Setting: • Test tape: TTS-900
• Volume: MAX
• Adjustment point: SFR1
Method: Playback the test tape (TTS-900) and adjust SFR1 so
that the tape speed is become 3000 ± 10Hz.
3. Tape Speed Adjustment (1.2cm)
Setting: • Test tape: TTS-910
• Volume: MAX
• Adjustment point: SFR3
Method: Playback the test tape (TTS-910) and adjust SFR3 so
that the tape speed is become 3000 ± 90Hz.
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S4
2.4
3
6

PRACTICAL SERVICE FIGURE

3000 Hz ± 90 Hz
Tape speed:
Wow & flutter: Less than 0.65% (RMS) (2.4cm)
Less than 0.65% (RMS) (1.2cm)
Take-up torque: 4 ~ 12 g-cm
F.F torque: 30 ~ 150 g-cm
Rew torque: 25 ~ 60 g-cm
Back tension: Less than 1.3 g-cm
S/N ratio: More than 50 dB (DC. PB)
More than 26 dB (DC. R/PB)
Noise level: Less than 1.7 mV (DC.Vol Max. PB)
Less than 18 mV (DC. Vol Max. R/PB)
Erasing ratio: More than 40 dB (1 kHz)
Test tape: TTS-900 (Wow & flutter/Tape speed – 2.4 cm)
TTS-910 (Wow & flutter/Tape speed – 1.2 cm)
TTS-920 (Distortion/Output)
TTS-930 (Azimuth)
TTS-940 (REC/PB)
VR1
VOL
J3
EXT MIC
J1
EAR PHONE