Sony HCD-ZUX9 Service Manual - Page 31

Hcd-zux9, Mechanical, Adjustments, Electrical

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SECTION 5 MECHANICAL ADJUSTMENTS • Precaution 1. Clean the following parts with a denatured alcohol-moistened swab : record/playback heads pinch roller erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer 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 unless otherwise noted. • Torque Measurement Mode Torque meter FWD CQ-102C FWD back tension CQ-102C FF/REW CQ-201B Meter reading 2.9 mN • m to 6.9 mN • m 30 to 70 g • cm (0.42 - 0.97 oz • inch) 0.15 mN • m to 0.59 mN • m 2 to 6 g • cm (0.03 - 0.08 oz • inch) 4.8 mN • m to 16.7 mN • m 49 to 170 g • cm (0.68 - 2.36 oz • inch) HCD-ZUX9 SECTION 6 ELECTRICAL ADJUSTMENTS DECK SECTION 0 dB = 0.775 V 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 RCH. 7. Switches and controls should be set as follows unless otherwise specified. • Test Tape Tape P-4-A100 Signal 10 kHz, -10 dB Used for Azimuth Adjustment [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 (10 kHz, −10 dB) JACK board PHONES jack (J904) level meter set + - 2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak. L-CH peak within 1dB output level screw position R-CH peak L-CH R-CH peak peak within 1dB screw position 31

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31
HCD-ZUX9
SECTION
5
MECHANICAL
ADJUSTMENTS
SECTION
6
ELECTRICAL
ADJUSTMENTS
[RECORD/PLAYBACK
HEAD
AZIMUTH
ADJUSTMENT]
Note:
Perform this adjustments for both decks
Procedure:
1.
Mode:
Playback
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
screw
position
L-CH
peak
within
1dB
output
level
L-CH
peak
R-CH
peak
within
1dB
screw
position
R-CH
peak
0 dB = 0.775 V
set
JACK board
PHONES jack
(J904)
+
–
level meter
test tape
P-4-A100
(10 kHz,
−
10 dB)
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.
Test Tape
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
• Precaution
1.
Clean the following parts with a denatured alcohol-moistened
swab :
record/playback heads
pinch roller
erase head
rubber belts
capstan
idlers
2.
Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head magnetizer 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 unless otherwise noted.
•
Torque Measurement
DECK SECTION
2.9 mN • m to 6.9 mN • m
30 to 70 g • cm
(0.42 – 0.97 oz • inch)
0.15 mN • m to 0.59 mN • m
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
4.8 mN • m to 16.7 mN • m
49 to 170 g • cm
(0.68 – 2.36 oz • inch)
CQ-102C
CQ-102C
CQ-201B
Mode
FWD
FWD
back tension
FF/REW
Torque meter
Meter reading
DECK A
DECK B