Sharp CD-C1W - Adjustment Procedures for Mechanisms and Tuner; Mechanism, Tape Section, and Bias Adjustments; Playback and Record Sensitivity Calibration

CD-C1W,CP-C1W
– 12 –
Figure 12-2 ADJUSTMENT POINTS
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
Torque Meter
Specified Value
• Torque Check
Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 60 to 120 g.cm 60 to 120 g.cm
Rewind: TW-2231 60 to 120 g.cm 60 to 120 g.cm
Torque Meter Specified Value
Tape 1
Tape 2
MECHANISM SECTION
• Driving Force Check
• Bias Frequency
Instrument
Connection
— 98 ± 10 kHz CNP102 1
ADJUSTMENT
Adjusting Point Specified Value
• Tape Speed
Normal MTT-111 VRM01 3,000 ± Speaker
speed 30 Hz terminal
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Position of each switch or control
Volume MAX
3D Surround Mode Button PASS
Pre-programmed Equalizer FLAT
Extra Bass OFF
Function TAPE
Dolby NR switch OFF
X-Bass OFF
TAPE SECTION
• Bias Current
Instrument
Connection
L: VR101 Normal: 45 ± 10 mV L: TP490 4
R: VR102 CrO2: 65 ± 15 mV R: TP490 2
Adjusting Point Specified Value
• Tape 1 Playback Amplifier Sensitivity
Adjusting
Point
Instrument
Connection
L: VRD01 L: TP451 3
R: VRD02 R: TP451 1
Test Tape
Specified Value
MTT-150
Normal: 300 mV
• Tape 2 Playback Amplifier Sensitivity
Adjusting
Point
Instrument
Connection
L: VRD03 L: TP451 3
R: VRD04 R: TP451 1
Test Tape
Specified Value
MTT-150
Normal: 300 mV
• Record/Playback Sensitivity
Adjusting
Point
Instrument
Connection
Record level
control
L: VR151
R: VR152
Test Tape
Specified Value
UR-127
215 mV
Input: VIDEO
Ouyput:
L: TP451 3
R: TP451 1
215 mV
UNIT
GND
TP490 2 PIN OR 4 PIN
RECORD
MODE
ELECTRONIC
VOLTMETER
TP490 3 PIN
VR102
VR101
VR152
VRD02
VRD04
VR151
VRM01
VRD03
VRD01
TP490
1234
TP451
123
R-CH BIAS
CURRENT
R-CH REC/
PLAY SENS.
L-CH REC/
PLAY SENS.
TAPE1 PLAY
R-CH SENS.
TAPE2 PLAY
R-CH SENS.
TAPE2 PLAY
L-CH SENS.
TAPE1 PLAY
L-CH SENS.
L-CH BIAS
CURRENT
WTM1
WTM2
TAPE SPEED
CFW2
CNP851
MAIN PWB
Figure 12-1 BIAS CURRENT