Read Sharp CD-C3H (serv.man6) Service Manual online
CD-C3H/CP-C3H
– 12 –
Figure 12-2 ADJUSTMENT POINTS
Play: TW-2412
Tape 1: Over 80 g
Tape 2: 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: 38
±
10 mV
L: TP490 4
R: VR102
CrO
2
: 55
±
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
control
L: VR151
R: VR152
R: VR152
Test Tape
Specified Value
UR-127
215 mV
Input: VIDEO
Output:
L: TP451 3
R: TP451 1
Output:
L: TP451 3
R: TP451 1
215 mV
UNIT
GND
TP490 2 PIN OR 4 PIN
RECORD
MODE
MODE
ELECTRONIC
VOLTMETER
VOLTMETER
TP490 3 PIN
Figure 12-1 BIAS CURRENT
VR102
VR101
VR152 VRD02VRD04
VR151
VRM01
VRD03
VRD01
TP490
1 2 3 4
TP451
1 2 3
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
CURRENT
WTM1
WTM2
TAPE SPEED
CFW2
CNP851
MAIN PWB
CNP102
1 2 3 4 5 6 7
CNP101
3 2 1
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