Read Sharp XL-55 (serv.man22) Service Manual online
– 9 –
XL-55H/65H
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Over 80 g
• Torque Check
Torque Meter
Play: TW-2111
30 to 60 g. cm
Fast forward: TW-2231
55 to 140 g.cm
Rewind: TW-2231
55 to 140 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
ADJUSTMENT
Specified Value
• Tape Speed
TUNER SECTION
MTT-111
Variable
3,000
±
Headphone
resistor in
90 Hz
terminal
motor.(M901)
Check Point
Instrument
Connection
Display
Frequency
87.5 MHz
87.5 MHz
3.4 V
±
1.0 V
TP301
108 MHz
108 MHz
7.8 V
±
1.0 V
TP301
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF
450 kHz
1,602 kHz
T351
*1
AM Band
—
531 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM
990 kHz
990 kHz
T302
*1
Tracking
fL: Low-renge frequency
fH: High-renge frequency
fH: High-renge frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
Adjusting
Parts
Instrument
Connection
Display
Frequency
98.00 MHz
98.00 MHz
VR351*1
Input: CNP301
(30 dB
µ
V)
Output: Speaker
Terminal
Terminal
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
TAPE MECHANISM
M901
Tape
Motor
Tape
Motor
Variable
resistor
in motor
resistor
in motor
IC303
IC302
FE301
CF352
R336
T306
VR351
T302
T351
MAIN PWB
FM Mute
Level
Level
AM IF
TP301
CNP301
ANTENNA
SOCKET
SOCKET
FM
AM
SO301
AM
Tracking
Tracking
AM Band
Coverage fL
Coverage fL
Figure 9-1 ADJUSTMENT POINT
Figure 9-2 ADJUSTMENT POINTS
*1. Input: Antenna
Output: Speaker terminal
*2. Input: Input is not connected
Output: TP301
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