– 4 –
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback/earth head pinch roller
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (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 sup-
ply voltage unless otherwise noted.
Torque Measurement
SECTION 3
MECHANICAL ADJUSTMENTS
Mode
Torque Meter
Meter Reading
CQ-102C
30-65 g•cm
FWD
(0.42-0.90 oz•inch)
FWD
1.5-6 g•cm
Back tension
(0.021-0.083 oz•inch)
CQ-102RC
30-65 g•cm
REV
(0.42-0.90 oz•inch)
REV
1.5-6 g•cm
Back tension
(0.021-0.083 oz•inch)
70-130 g•cm
FF, REW
CQ-201B
(0.98-1.80 oz•inch)
SECTION 4
ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in the order given in
the service manual. As a rule, adjustments about playback
should be performed before those about recording.
The adjustments should be performed before for both L-CH
and R-CH.
• Switches and controls should be set as follows unless otherwise
specified.
DOLBY NR switch
: OFF
DIRECTION switch :
A
0 dB=0.775 V
Test Tape
Type
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
P-4-L300
315 Hz, 0 dB
Playback Level Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Check
Test Mode
This set will get into test mode by shorting the pins of CN801 (2P)
on MAIN board before turning the power on.
