Mechanical Adjustment - Sony HCD-F50 Service Manual

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• TAPE MECHANISM DECK SECTION
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
erase head
capstan
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
supply voltage unless otherwise noted.
• 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 ALIGMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to CN405 of the MAIN board.
TE
L 13942296513
D SENS
GND
HH OUT
MAIN board
CN405
3. While pressing the CLEAR and CD PLUS 1 buttons at the same time and turn ON the power.
0 = button
POWER button
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SECTION 4

MECHANICAL ADJUSTMENT

pinch roller
rubber belts
idlers
SENS (CH1)
TEST (CH2)
GND
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8
• Torque Measurement
Torque Torque Meter
Forward CQ-102C
Forward
CQ-102C
Back Tension
Reverse CQ-102RC
Reverse
CQ-102RC
Back Tension
FF, REW CQ-201B
• Tape Tension Measurement
Torque Tension Meter
Forward CQ-403A
Reverse CQ-403R
Q Q
3 6 7 1 3 1 5
oscilloscope
) + button
CD PLUS 1 button
CLEAR button
CHECK button
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.
9 4 2 8
Meter Reading
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
(0.026 – 0.082 oz•inch)
36 to 61g•cm
(0.50 – 0.84 oz•inch)
2 to 6g•cm
(0.026 – 0.082 oz•inch)
61 to 143g•cm
(0.85 – 1.98 oz•inch)
Meter Reading
more than 100 g (3.52 oz)
more than 100 g (3.52 oz)
0 5 8 2 9 9 4 2 8
m
9 9
9 9