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SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
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
3-2. ELECTRICAL ADJUSTMENT
1. The adjustment should be performed in the publication.
(Be sure to make playback adjustment at first.)
2. The adjustment and measurement should be performed for both
L-CH and R-CH.
• Switch position
DOLBY NR switch : OFF
FUNCTION button : OFF
EFFECT switch : OFF
DBFB switch : OFF
3. Deck section electrical adjustments are made in test mode by
press key switch same time CD STOP DECK A STOP and
DECK B STOP button.
4. Input point and output level measurement point.
• Test Tape
0 dB=0.775V
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Procedure:
1. Forward Playback mode
Reverse Playback mode
Mode Torque Meter Meter Reading
Forward CQ-102C
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Forward
CQ-102C
2 to 6g•cm
Back Tension (0.028 – 0.083 oz•inch)
Reverse CQ-102RC
36 to 61g•cm
(0.50 – 0.84 oz•inch)
Reverse
CQ-102RC
2 to 6g•cm
Back Tension (0.028 – 0.083 oz•inch)
FF, REW CQ-201B
61 to 143g•cm
(0.85 – 1.99 oz•inch)
Mode Tension Meter Meter Reading
Forward CQ-403A
more than 100 g (3.53 oz)
Reverse CQ-403R
more than 100 g (3.53 oz)
DECK SECTION
Tape Signal Used for
P-4-A100 10 kHz, –10 dB
Head Azimuth Adjustment
P-4-L300 315 Hz, 0dB Level Adjustment
WS-48B 3 kHz, 0dB Tape Speed Adjustment
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