Mechanical Adjustments; Electrical Adjustments - Sony HCD-G1 Service Manual

QQ
3 7 63 1515 0

MECHANICAL ADJUSTMENTS

Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
erase head
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer.
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
Torque
FWD
FWD
back tension
FF/REW
TE
L 13942296513
www
.
http://www.xiaoyu163.com
SECTION 3
pinch rollers
rubber belts
idlers
Torque meter Meter reading
40 to 70 g • cm
CQ-102C
(0.56 - 0.97 oz • inch)
1 to 5 g • cm
CQ-102C
(0.01 - 0.07 oz • inch)
55 to 140 g • cm
CQ-201B
(0.76 - 1.94 oz • inch)
x ao
y
i
http://www.xiaoyu163.com
8

ELECTRICAL ADJUSTMENTS

DECK SECTION
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 sup-
ply 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.
Tape
P-4-A100
WS-48B
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
test tape
P-4-A100
(10kHz, –10dB)
Q Q
3 6 7 1 3
u163
.
— 9 —
SECTION 4
2 9 9 4 2 8
0 dB=0.775V
Signal
10 kHz, –10 dB
Azimuth Adjustment
Tape Speed Adjustment
3 kHz, 0 dB
SPEAKER
1 5 0 5 8 2 9 9 4
terminal
set
m
co
9 9
Used for
level meter
2 8 9 9
+
–