Removing And Reinstalling The Main Parts; Adjustment - Sharp CD-PC672 Service Manual

CD-PC672

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION
Perform steps 1, 2, 3 and 10-14 of the disassembly method to
remove the CD mechanism.
How to remove the loading motor
(See Fig. 12-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
How to remove the pickup (See Fig. 12-2)
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 to protect the optical pickup from
electrostatic damage.
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412
• Torque Check
Torque Meter
Play: TW-2111 30 to 60 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 60 g.cm
60 to 120 g.cm
60 to 120 g.cm
Loading / Up
/ Down Motor
Motor
PWB
( B1 ) x2
ø2.6 x6mm
Shaft
( B2 ) x1
• Tape Speed
Test Tape
Normal MTT-111
speed
TAPE MECHANISM
Volume in motor
– 12 –
( A1 ) x2
ø2.6 x5mm
Figure 12-1
Stop Washer
( B3 ) x1
Pickup
CD Mechanism
Gear
( B4 ) x1
Figure 12-2
Adjusting Specified Instrument
Point Value Connection
3,000 ±
Volume in Speaker
motor. 30 Hz terminal
(MM1) (Load
resistance:
8 ohms)
MM 1
Motor