Mechanical Adjustments; Electrical Adjustments - Sony HCD-ZX6 Service Manual

SECTION 5

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
demagnetizer.
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 unless otherwise noted.
Torque Measurement
Mode Torque Meter
FWD
CQ-102C
FWD
back tension
FF/REW CQ-201B
pinch rollers
rubber belts
idlers
Meter Reading
2.9 – 6.9 mN • m
(30 to 70 g • cm)
(0.42 – 0.97 oz • inch)
0.19 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
7.8 – 16.7 mN • m
(80 to 170 g • cm)
(1.11 – 2.36 oz • inch)
SECTION 6

ELECTRICAL ADJUSTMENTS

DECK SECTION
0 dB=0.775 V
Precaution
1. Demagnetize the record/playback head with a head
demagnetizer.
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 adjustment
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 otherwise
specified.
8. 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 x (TC-B) , [TUNER ENTER], 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
P-4-A100 10 kHz, –10 dB
WS-48B 3 kHz, 0 dB
HCD-ZX6/ZX8
Used for
Azimuth Adjustment
Tape Speed Adjustment
25