Sony HCD-XG700, Service Manual

Page: 14 / 80

14
HCD-XG80/XG700
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head
rubber belts
capstan idlers
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
Mode Torque Meter Meter Reading
3.1~6.96 mN•m
FWD CQ-102C (31 to 71 g•cm)
(0.43 – 0.98 oz•inch)
FWD
0.20~0.58 mN•m
back tension
CQ-102C (2 to 6 g•cm)
(0.03 – 0.08 oz•inch)
3.1~6.96 mN•m
REV CQ-102RC (31 to 71 g•cm)
(0.43 – 0.98 oz • inch)
REV
0.20~0.58 mN•m
back tension
CQ-102RC (2 to 6 g•cm)
(0.03 – 0.08 oz • inch)
6.97~14.02 mN•m
FF/REW CQ-201B (71 to 143 g•cm)
(0.99 – 1.99 oz • inch)
9.80 mN•m
FWD tension CQ-403A (100 g or more)
(3.53 oz or more)
9.80 mN•m
REV tension CQ-403A (100 g or more)
(3.53 oz or more)
Precaution
1. Demagnetize the record/playback head with a head demagne-
tizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
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 ad-
justment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless other-
wise specified.
8. Set to the DOLBY NR OFF.
9. Set to the test mode.
(1) Press the
? / 1
button to turn the power ON.
(2) Select the function “TAPE A or B”.
(3) Press the button of
[ /CLOCK SET]
,
[ENTER/NEXT]
,
and
[DISC 3]
simultaneously, to set the tape deck test mode
and displays “TEST MODE” on the fluorescent indicator
tube.
(4) To release from the test mode, press the ? / 1 button.
• Test Tape
Tape Signal Used for
P-4-A100 10 kHz, – 10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
P-4-L300 315 Hz, 0 dB Playback Level Adjustment
0 dB = 0.775 V
DECK SECTION
c