Sony TCM-1000A - SECTION 2 ADJUSTMENTS; MECHANICAL ADJUSTMENT; ELECTRICAL ADJUSTMENTS; Record;playback Head Azimuth Adjustment

TCM-1000A
SECTION 2
ADJUSTMENTS
2-1. MECHANICAL ADJUSTMENT
PRECAUTION
1. Clean the following parts with a denatured-
alcohol-moistened swab:
record/playback head pinch roller
erase head rubber belts
capstan idiers
2. Demagnetize the record/playback head with a
head demagnetizer. (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 supply voltage (2.5 V dc) unless
otherwise noted.
Torque Measurement
22 — 48 g-cm
CQ102€ | (0.29 — 0.64 oz-inch)
22 — 48 g-cm
more than 60 g-cm
FF, REW CQ-2018B (0.83 oz-inch)
. 0.5 — 5 g-cm
Back Tension CQ-102C (0.01 — 0.1 02-inch)
. more than 60 g:cm
Tape pulling force} CQ-403A (0.83 oz-inch)
Test Tape:
Type Signal Used for
P-4-A063 6.3 kHz, —-10dB | Azimuth Adjustment
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
2-2. ELECTRICAL ADJUSTMENTS
Record/playback Head Azimuth Adjustment
Setting:
VOL control: mechanical mid
Procedure:
1. Mode: forward-playback
test tape
P-4-A063
(6.3 kHz, ~10 dB)
earphones jack
Lz)
. Turn the adjustment screw for maximum VTVM
reading.
. Set in the reverse-playback mode and repeat the
steps 1 — 2.
Note: Several peaks may appear, but take the maximum.
Adjustment Location:
adjustment screw