Sony HCD-MC3AV - Section 4 Mechanical Adjustments; Tape Mechanism Adjustments; CD Mechanism Adjustments

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SECTION 4
MECHANICAL ADJUSTMENT
• TAPE MECHANISM DECK SECTION
• Torque Measurement
• CD MECHANISM DECK SECTION
To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.
DISC SENSOR ALIGNMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to IC401$™, IC4024 of the MAIN board.
3. Turn the power switch on.
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
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.
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
4. Press the p button, ENTER button and GROUP 5 button simultaneously.
oscilloscop
e
IC401 $™ D.SENS (CH1)
IC401
4 HHOUT (CH2)
GND