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SECTION 5 MECHANICAL ADJUSTMENTS
Precaution 1. Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 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. Torque Measurement
Mode FWD FWD back tension REV REV back tension FF/REW Torque meter CQ-102C Meter reading 3.04 � 6.96 N � m (31 to 71 g � cm) (0.43 � 0.98 oz � inch) 0.20 � 0.58 N � m (2 to 6 g � cm) (0.02 � 0.08 oz � inch) 3.04 � 6.96 N � m (31 to 71 g � cm) (0.43 � 0.98 oz � inch) 0.20 � 0.58 N � m (2 to 6 g � cm) (0.02 � 0.08 oz � inch) 6.97 � 14.02 N � m (71 to 143 g � cm) (0.98 � 1.99 oz � inch) 0.98 N � m or more (100 g or more) (3.53 oz or more) 0.98 N � m or more (100 g or more) (3.53 oz or more)
HCD-CL1/CL3 SECTION 6 ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head demagnetizer. 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjusted. 4. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.) 6. The adjustments should be performed for both L-CH and R-CH. 7. Switches and controls should be set as follows unless otherwise specified.
Tape P-4-A100 WS-48B Signal 10 kHz, �10 dB 3 kHz, 0 dB Used for Azimuth Adjustment Tape Speed Adjustment
CQ-102C
Record/Playback Head Azimuth Adjustment Procedure: 1. Mode : Playback
test tape P-4-A100 (10kHz, �10dB) main board CN301 Pin 1 (L-ch) Pin 3 (R-ch) set
CQ-102RC
CQ-102RC
CQ-201B
level meter
FWD tension REV tension
CQ-403A CQ-403R
+ �
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.
L-CH peak
output level
within 1 dB within 1dB
screw position
R-CH peak screw position
L-CH peak
R-CH peak
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