— 9 —
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback head
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
SECTION 3
MECHANICAL ADJUSTMENTS
Meter reading
40 to 70 g • cm
(0.56 - 0.97 oz • inch)
1 to 5 g • cm
(0.01 - 0.07 oz • inch)
55 to 140 g • cm
(0.76 - 1.94 oz • inch)
Torque
FWD
FWD
back tension
FF/REW
Torque meter
CQ-102C
CQ-102C
CQ-201B
SECTION 4
ELECTRICAL ADJUSTMENTS
1.
Demagnetize the record/playback head with a head
damagnetizer.
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.
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1.
Mode : Playback
DECK SECTION
0 dB=0.775V
Tape
P-4-A100
WS-48B
Signal
10 kHz, –10 dB
3 kHz, 0 dB
Used for
Azimuth Adjustment
Tape Speed Adjustment
test tape
P-4-A100
(10kHz, –10dB)
SPEAKER
terminal (JK501)
level meter
+
–
set
