Read Sharp RT-XV300H Service Manual online
RT-XV300H
– 5 –
ADJUSTMENT
Adjusting the deck circuit
Figure 5-2 ADJUSTMENT POINTS
MECHANISM SECTION
• Driving Force Check
• Checking the bias oscillation frequency
—
85
±
7kHZ
TP101 1 or 3
Adjusting object
Set value
Connection
Play: TW-2412
80 g or more
Reverse Play: TW-2422
80 g or more
Specified Value
Torque Meter
• Checking the playback/FF/rewinding torque
Torque Meter
Specified Value
Play: TW-2111
25 to 65 g. cm
Reverse Play: TW-2121
25 to 65 g.cm
Fast forward: TW-2231
60 to 130 g.cm
Rewind: TW-2231
60 to 130 g.cm
• Adjusting the record/playback head azimuth
* Raise the cassette holder cover and remove it , and then
adjust the azimuth.
MTT - 114
Output: L: TP102 1 R: TP102 4
Connection
Test Tepe
• Checking the bias current
L: VR105
Standard: 15
±
3 mV
L: TP101 1
R: VR106
R: TP101 3
Adjusting object
Set value
Connection
MTT-150
L: VR101
Standard: 580mV
L:TP102 1
R: VR102
R: TP102 4
Connection
• Adjusting the playback amplifier sensitivity
Connection
Set value
Test Tape
• Adjusting the record/playback amplifier sensitivity
UR-121
Record level control
200mV
Input:AUX
(1kHz)
(1kHz)
L: VR103
200mV
Output:
R: VR104
L: TP102 1
R: TP102 4
R: TP102 4
Connection
Set value
Connection
Test Tape
Figure 5-1 BIAS CURRENT
1
VR101
L-ch
P. B. AMP.SENS.
P. B. AMP.SENS.
VR103
VR104
VR105 VR106
TP101
TP102
VR102
2
3
4
3
2
1
MAIN PWB
L-ch
BIAS
BIAS
R-ch
BIAS
BIAS
R-ch
P. B. AMP.SENS.
P. B. AMP.SENS.
L-ch
REC. AMP.SENS.
REC. AMP.SENS.
R-ch
REC. AMP.SENS.
REC. AMP.SENS.
L-ch
GND
GND
R-ch
GND
R-ch
L-ch
GND
R-ch
Unit
Record mode
1
3
Electronic voltmeter
560k
Ω
560
Ω
GND (TP101pin )
2
TP101 pin or pin
Click on the first or last page to see other RT-XV300H service manuals if exist.