Adjustment; Cd Mechanism Section - Sharp CD-BA120 Service Manual

CD MECHANISM SECTION

Perform steps 1, 2, 3, 9, 12 and 13 of the disassembly method
to remove the CD mechanism.
How to remove the loading motor
(See Fig. 11-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
How to remove the pickup (See Fig. 11-2)
1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Note
After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2111
• Torque Check
Torque Meter
Play: TW-2111 30 to 80 g. cm
Fast forward: TW-2231 —
Rewind: TW-2231 —

ADJUSTMENT

Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
Specified Value
Tape 1
Tape 2
30 to 80 g.cm
70 to 180 g.cm
70 to 180 g.cm
Stop Washer
(B1) x2
(B3) x1
ø2.6 x6mm
Shaft
(B2) x1
• Tape Speed
Test Tape
Normal MTT-111
speed
TAPE MECHANISM
Variable Resistor in motor
– 11 –
CD-BA120/125
Loading Motor
(A1)x2
(A1)x2
CD Base
Figure 11-1
CD Mechanism
Gear
(B4) x1
Figure 11-2
Adjusting Specified Instrument
Point Value Connection
3,000 ±
Variable Speaker
Resistor in 30 Hz terminal
motor. (Load
resistance:
6 ohms)
Motor
Figure 11-3
(A1)x1
Pickup