counter
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 100 g
REV CQ-403R
(more than 3.52 oz)
Mode Torque Meter Meter Reading
3.53 – 5.98 mN•m
FWD (36 – 61 g•cm)
CQ-102C
(0.50 – 0.89 oz•inch)
FWD
0.20 – 0.58 mN•m
Back tension
(2.0 – 6.0 g•cm)
(0.028 – 0.076 oz•inch)
3.53 – 5.98 mN•m
REV (36 – 61 g•cm)
CQ-102RC
(0.50 – 0.89 oz•inch)
REV
0.20 – 0.58 mN•m
Back tension
(2.0 – 6.0 g•cm)
(0.028 – 0.076 oz•inch)
5.99 – 14.02 mN•m
FF, REW CQ-201B (61 – 143 g•cm)
(0.89 – 2.00 oz•inch)
Adjust so that the frequency at the beginning and that at the end of
tape winding are between 2,955 and 3,045 Hz.
Adjustment Location:
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback/erase head pinch roller
rubber belts capstan
idlers
2. Demagnetize the record/playback/erase head with a head de-
magnetizer. (Do not bring the head demagnetizer close to the
erase head portion.)
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
Tape Tension Measurement
Standard Output Level
Test Tape
5-1. TAPE SECTION 0 dB = 0.775 V
1. The adjustments should be performed in the order given in the
service manual. (As a general rule. Playback circuit adjustment
should be completed before performing recording circuit ad-
justment.)
2. The adjustments should be performed for both L-ch and R-ch
unless otherwise indicated.
SP OUT PHONES
Load impedance 4 Ω 32 Ω
Output level 0.775 V (0 dB) 0.25 V (–10 dB)
Type Signal Used for
WS-48B 3 kHz, 0 dB Tape speed adjustment
P-4-A100 10 kHz, –10 dB Head azimuth adjustment
Digital frequency counter
2,970 to 3,030 Hz
Adjust so that the value on the frequency counter is 3,000 Hz.
Specification Values:
TC board
M691
TAPE SPEED
Adjustment
To Next Page
Loading...
