Read Sharp XL-30 (serv.man6) Service Manual online
– 13 –
XL-30H/30W
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)
Adjusting
Parts
Display
Frequency
• FM Mute Level (For XL-30W)
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.
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 (XL-30H/30W)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*1
Input: SO301
(25 dB
µ
V)
Output: Speaker
Terminal
Terminal
Instrument
Connection
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 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 (For XL-30H)
AM IF
450 kHz
1,602 kHz
T351
*1
AM Band
—
531 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM Tracking 990 kHz
990 kHz
T302
*1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
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 RF (XL-30H/W)
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Signal generator: 1 kHz, 75 kHz dev., FM modulated
FM Band
—
87.50 MHz
(fL): L303
*1
Coverage
3.4
±
0.1 V
FM RF
98.00 MHz
98.00 MHz
L302
*2
(10~30 dB)
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna,
Output: TP301
*2. Input: Antenna,
Output: Speaker Terminal
• FM Detection (XL-30H/W)
Signal generator: 10.7 MHz, FM sweep generator
Signal generator: 10.7 MHz, FM sweep generator
FM IF
10.7 MHz
98.00 MHz
T304(Turn
Input: Pin 1 of
the core of
IC301
T304 fully
counter-
clockwise).
counter-
clockwise).
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna,
Output: Speaker Terminal
*2. Input: Input is not connected,
Output: TP301
• FM Mute Level (For XL-30H)
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.
• AM IF/RF (For XL-30W)
Signal generator: 400 Hz, 30%, AM modulated
Signal generator: 400 Hz, 30%, AM modulated
Span selectors are to be 9 kHz (AM), 50 kHz (FM).
Figure 13-1 ADJUSTMENT POINT
Figure 13-2 ADJUSTMENT POINTS
TAPE MECHANISM
M901
Tape
Motor
Tape
Motor
Variable
resistor
in motor
resistor
in motor
IC303
IC302
CF352
R336
T306
VR351
T302
T304
L303
IC301
L302
BF301
T351
1
9
MAIN PWB
ANTENNA
SOCKET
SOCKET
FM Mute
Level
Level
AM IF
TP301
CNP301
AM
Tracking
Tracking
AM Band
Coverage fL
Coverage fL
FM Band
Coverage fL
Coverage fL
FM RF
FM IF
SO301
ANTENNA
SOCKET
(XL-30W
Only)
ANTENNA
SOCKET
(XL-30W
Only)
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