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WM-GX400
SECTION 3 ADJUSTMENTS
3-2. ELECTRICAL ADJUSTMENTS
Note: 1. Supplied voltage: 3 V (DC) 2. Switch and control position VOLUME control SPEAKER/HEADPHONE switch AVLS switch FUNCTION switch ISS switch
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured alcohol-moistened swab : record/playback/erase head pinch roller capstan rubber belts 2. Demagnetize the record/playback/erase head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 6. Power supply voltage : 3V DC. Torque Measurement
Mode Forward/Reverse Torque Meter CQ-102C Meter Reading 1.97 to 3.92 mN � m (20 to 40 g � cm) (0.28 to 0.55 oz� inch) 0.05 to 0.49 mN � m (0.5 to 5.0 g � cm) (0.007 to 0.07 oz� inch) CQ-102RC 0.05 to 0.49 mN � m (0.5 to 5.0 g � cm) (0.007 to 0.07 oz� inch) more than 4.90 mN � m (50 g � cm) (0.7 oz� inch)
: maximum : i (headphone) : OFF : OFF :1
TAPE DECK SECTION
Test Tape
Type WS-48A Signal 3 kHz, 0 dB
0 dB = 0.775 V
Used for Tape Speed Adjustment
Tape Speed Adjustment Procedure:
test tape WS-48A (3kHz, 0dB) set 16� frequency counter
Forward Back Tension Reverse Back Tension
CQ-102C
i headphone jack (J301)
Fast Forward and Rewind
CQ-201B
1. Set REC TIME switch (S706) to NORMAL (4.8cm/s). 2. Play back the center portion of tape in REVmode, adjust RV602 so that the reading on the frequency counter becomes 3,000 Hz. 3. Set REC TIME switch (S706) to DOUBLE (2.4cm/s). 4. Play back the center portion of tape in REVmode, adjust RV601 so that the reading on the frequency counter becomes 1,500 Hz. Specifications: NORMAL (4.8cm/s) : 2,985Hz - 3,015Hz DOUBLE (2.4cm/s) : 1,485Hz - 1,515Hz 5. Confirm the frequency difference between the beginning and the end of tape should be 1.5%. NORMAL (4.8cm/s) : 45Hz DOUBLE (2.4cm/s) : 22.5Hz Adjustment Location:
[MAIN BOARD] (SIDE B)
TP2 GND
IC1 TP1 IC301
RV602
RV601
RV601: Tape Speed Adjustment (2.4cm/s) RV602: Tape Speed Adjustment (4.8cm/s)
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