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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 � Tape Tension Measurement � Torque Measurement
Mode Forward Forward Back Tension Reverse Reverse Back Tension FF, REW CQ-201B Torque Meter CQ-102C Meter Reading 36 to 61g�cm (0.50 � 0.84 oz�inch) CQ-102C CQ-102RC CQ-102RC 2 to 6g�cm (0.026 � 0.082 oz�inch) 36 to 61g�cm (0.50 � 0.84 oz�inch) 2 to 6g�cm (0.026 � 0.082 oz�inch) 61 to 143g�cm (0.85 � 1.98 oz�inch)
SECTION 6 ELECTRICAL ADJUSTMENTS
TAPE DECK SECTION
0 dB=0.775 V
1. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjust. 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 Rch. 7. Switches and controls should be set as follows unless otherwise specified. 8. Set to test mode. (Press key switch same time
[SPECTRUM ANALYZER] [ENTER] and [EFFECT] button.) � Test Tape
Tape P-4-A100 WS-48B P-4-L300 Signal 10 kHz, �10 dB 3 kHz, 0 dB 315 Hz, 0 dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment
Record/ Playback Head Azimuth Adjustment
� Tape Tension Measurement
Mode Forward Reverse Tension Meter CQ-403A CQ-403R Meter Reading more than 100 g (3.52 oz) more than 100 g (3.52 oz)
DECK A
Procedure:
DECK B
Note: Perform this adjustments for both decks
test tape P-4-A100 (10 kHz, �10 dB)
main board CN207 Pin 3 (L-CH) Pin 1 (R-CH) level meter set main board CN207 Pin 2 + �
� 17 �
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