Adjustment - Sharp CD-C1W Service Manual

CD-C1W,CP-C1W
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 60 to 120 g.cm
Rewind: TW-2231 60 to 120 g.cm
• Tape Speed
Test Tape Adjusting
Point
Normal MTT-111 VRM01
speed
TAPE SECTION
Position of each switch or control
Volume
3D Surround Mode Button
Pre-programmed Equalizer
Extra Bass
Function
Dolby NR switch
X-Bass
RECORD
TP490 2 PIN OR 4 PIN
MODE
UNIT
TP490 3 PIN
GND
Figure 12-1 BIAS CURRENT
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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
Specified Instrument
Value Connection
3,000 ±
Speaker
30 Hz terminal
MAX
PASS
FLAT
OFF
TAPE
OFF
OFF
ELECTRONIC
VOLTMETER
MAIN PWB
VR101
TP490
VR102
1 2 3 4
L-CH BIAS
CURRENT
R-CH BIAS
CURRENT
WTM1
VRM01
TAPE SPEED
Figure 12-2 ADJUSTMENT POINTS
• Bias Frequency
Adjusting Point
—
• Bias Current
Adjusting Point
L: VR101
R: VR102
• Tape 1 Playback Amplifier Sensitivity
Adjusting
Test Tape
Point
L: VRD01
MTT-150
R: VRD02
• Tape 2 Playback Amplifier Sensitivity
Adjusting
Test Tape
Point
L: VRD03
MTT-150
R: VRD04
• Record/Playback Sensitivity
Adjusting
Test Tape
Point
Record level
control
UR-127
L: VR151
R: VR152
VR152 VRD02 VRD04
R-CH REC/
PLAY SENS.
TAPE1 PLAY
R-CH SENS. VRD03
VR151
VRD01
L-CH REC/
PLAY SENS.
TAPE1 PLAY
WTM2
CFW2
– 12 –
Instrument
Specified Value
Connection
98 ± 10 kHz
CNP102
Instrument
Specified Value
Connection
Normal: 45 ± 10 mV
L: TP490 4
CrO2: 65 ± 15 mV
R: TP490 2
Instrument
Specified Value
Connection
L: TP451 3
Normal: 300 mV
R: TP451 1
Instrument
Specified Value
Connection
L: TP451 3
Normal: 300 mV
R: TP451 1
Instrument
Specified Value
Connection
Input: VIDEO
215 mV
Ouyput:
L: TP451 3
215 mV
R: TP451 1
TAPE2 PLAY
R-CH SENS.
TAPE2 PLAY
L-CH SENS.
TP451
1 2 3
L-CH SENS.
CNP851
1