Mechanical Adjustments - Sony HCD-DP900P Service Manual

HCD-DP900D
[VACS ON/OFF MODE]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
Press three buttons x , ENTER and SPECTRUM or KARAOK
PON simultaneously.
[REPEAT 5 LIMIT OFF MODE]
• This mode is used to enable infinite repetitions.
Normally, the number of repetitions allowed is 5.
Procedure:
1. Press `/1 button to turn ON the power supply.
2. Set the function "DVD".
3. Press three burtons ENTER , DISC 3 , and x is simultaneously.
4. Infinite repetitions is enabled.
5. This state is maintained ( memorized ) until COLD RESET is
executed.
16
SECTION 4

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
CQ-102C
back tension
REV CQ-102RC
REV
CQ-102RC
back tension
FF/REW CQ-201B
FWD tension CQ-403A
REV tension CQ-403R
pinch rollers
rubber belts
idlers
Meter reading
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)