Adjustment - Sharp CD-BA250 Service Manual

CD MECHANISM SECTION
Perform steps 1, 2, 3, 10,11,12 and 13 of the disassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 13-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
2. Remove the drive belt (A2) x 1pc.
How to remove the pickup (See Fig. 13-2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2).
2. Remove the screws (B3) x 2 pcs., to remove the shaft (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 —
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ADJUSTMENT

Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
Specified Value
Tape 2
Tape 1
30 to 80 g.cm
70 to 180 g.cm
70 to 180 g.cm
CD Player
Chassis
(B1) x2
ø2.6 x6mm
Shaft
(B2) x1
• Tape Speed
Adjusting
Test Tape
Normal MTT-111 Variable
speed Resistor in
motor.
TAPE MECHANISM
Variable Resistor in motor
– 13 –
CD-BA250/CD-BA2600
Loading Motor
(A1)x1
(A1)x2
(A1)x2
Loading
Motor
Pulley
Drive Belt
(A2) x1
Figure 13-1
Stop Washer
(B3) x1
CD Mechanism
Gear
(B4) x1
Figure 13-2
Specified Instrument
Point Value Connection
3,000 ± 30 Hz
Speaker
terminal
(Load
resistance:
6 ohms)
Tape
Motor
Figure 13-3
Pickup