Adjustment - Sharp XL-30H Service Manual

MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412
• Torque Check
Torque Meter
Play: TW-2111
Fast forward: TW-2231
Rewind: TW-2231
• Tape Speed
Adjusting
Test Tape
Point
MTT-111 Variable
resistor in
motor.(M901)
TAPE MECHANISM
Figure 13-1 ADJUSTMENT POINT
TUNER SECTION
fL: Low-renge frequency
fH: High-renge frequency
• AM IF/RF (For XL-30H)
Signal generator: 400 Hz, 30%, AM modulated
Frequency Frequency
IF 450 kHz
AM Band —
Coverage
AM 990 kHz
Tracking
• AM IF/RF (For XL-30W)
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
AM IF 450 kHz
AM Band —
Coverage
AM Tracking 990 kHz
*1. Input: Antenna, Output: Speaker Terminal
*2. Input: Input is not connected,
Span selectors are to be 9 kHz (AM), 50 kHz (FM).
• Check FM VT (XL-30H/30W)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Display
Frequency
87.5 MHz 87.5 MHz
108 MHz 108 MHz
Specified Value
Over 80 g
Specified Value
30 to 60 g. cm
55 to 140 g.cm
55 to 140 g.cm
Specified
Instrument
Value
Connection
3,000 ±
Headphone
90 Hz terminal
M901
Tape
Motor
Variable
resistor
in motor
Display Setting/
Instrument
Adjusting
Connection
Parts
1,620 kHz T351 *1
522 kHz (fL): T306 *2
1.1 ± 0.1 V
990 kHz T302 *1
Frequency
Setting/ Instrument
Display
Adjusting Connection
Parts
1,602 kHz T351 *1
531 kHz (fL): T306 *2
1.1 ± 0.1 V
990 kHz T302 *1
Output: TP301
Check Point Instrument
Connection
3.4 V ± 1.0 V
TP301
7.8 V ± 1.0 V
TP301

ADJUSTMENT

• FM Mute Level (For XL-30W)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
98.00 MHz
(25 dBµV)
*1. Adjust so that an output signal appears.
• FM Mute Level (For XL-30H)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
98.00 MHz
(30 dBµV)
*1. Adjust so that an output signal appears.
• FM Detection (XL-30H/W)
Signal generator: 10.7 MHz, FM sweep generator
Test Frequency
Stage
FM IF 10.7 MHz
• FM RF (XL-30H/W)
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage Frequency
FM Band
Coverage
FM RF
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker Terminal
IC303
– 13 –
Display Adjusting
Parts
98.00 MHz VR351*1
Display
Adjusting
Parts
98.00 MHz VR351*1
Frequency Setting/
Display Adjusting
98.00 MHz T304(Turn
the core of IC301
T304 fully
counter-
clockwise).
Frequency
Display
— 87.50 MHz
98.00 MHz 98.00 MHz
(10~30 dB)
MAIN PWB
FM Band
FM Mute
Coverage fL
Level
AM IF
VR351
T351
L303
T304
CF352
TP301
FM IF
FM RF
L302
R336
T302
T306
AM Band
AM
Coverage fL
Tracking
Figure 13-2 ADJUSTMENT POINTS
XL-30H/30W
Instrument
Connection
Input: SO301
Output: Speaker
Terminal
Instrument
Connection
Input: CNP301
Output: Speaker
Terminal
Instrument
Connection
Parts
Input: Pin 1 of
Setting/
Instrument
Adjusting
Connection
Parts
(fL): L303 *1
3.4 ± 0.1 V
L302 *2
IC302 SO301
ANTENNA
SOCKET
(XL-30W
Only)
9
IC301
BF301
1
CNP301
ANTENNA
SOCKET