Read Sharp CD-PC651H (serv.man4) Service Manual online
– 11 –
CD-PC671H/651H
MECHANISM SECTION
•
Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Tape 1: Over 80 g
Tape 2: Over 80 g
Tape 2: Over 80 g
•
Torque Check
Torque Meter
Tape 2
Play: TW-2111
30 to 60 g. cm
30 to 60 g.cm
Fast forward: TW-2231
—
60 to 120 g.cm
Rewind: TW-2231
—
60 to 120 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
Variable
3,000
±
Speaker
speed
Resistor in
30 Hz
terminal
motor.
(Load
(MM1)
resistance:
8 ohms)
8 ohms)
ADJUSTMENT
Specified Value
Tape 1
•
Tape Speed
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
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 11-2
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.
remove the CD mechanism.
How to remove the loading motor
(See Fig. 11-1)
(See Fig. 11-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 11-1
( B1 ) x2
ø2.6 x6mm
ø2.6 x6mm
Shaft
( B2 ) x1
( B2 ) x1
Stop Washer
( B3 ) x1
( B3 ) x1
Gear
( B4 ) x1
( B4 ) x1
CD Mechanism
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.
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.
TAPE MECHANISM
MM 1
Motor
Motor
Variable Resistor in motor
( A1 ) x2
ø2.6 x5mm
ø2.6 x5mm
Loading Motor
Motor
PWB
PWB
Figure 11-3
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