Adjustment - Sharp XL-520H 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 Motor
TAPE MECHANISM
Volume in motor
Figure 9-1 ADJUSTMENT POINT
T351
VR351
AM IF
TP301
TP302
MW BAND
COVERAGE
LW BAND
COVERAGE
Figure 9-2 ADJUSTMENT POINTS

ADJUSTMENT

Specified Value
Over 80 g
Specified Value
30 to 70 g. cm
50 to 140 g.cm
50 to 140 g.cm
Specified
Instrument
Value
Connection
3,000 ±
Headphone
90 Hz terminal
M901
Motor
MAIN PWB
FM MUTE
LEVEL
R331
T306
T302
CNP301
T305
MW
TRACKING
LW
T301
TRACKING
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
IF 450 kHz
MW Band —
Coverage
LW Band —
Coverage
MW 990 kHz
Tracking
LW 225 kHz
Tracking
*1. Input: Antenna, Output: Speaker Terminal
*2. Input: Input is not connected,
• Setting the Test Mode
Keeping the BAND button and MEMORY button pressed, turn
on POWER. Then, the frequency is initially set in the memory
as shown in Table. Call it with the
for adjustment and check of tuner circuit.
Preset No.
1
2
3
4
5
Preset No.
11
12
13
14
15
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
98.00 MHz
(25 dBµV)
Adjust so that an output signal appears.
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
SO301
ANTENNA
Frequency
TERMINAL
87.5 MHz
108 MHz
– 9 –
XL-520H,520E/CP-520,520E
Frequency Setting/
Display Adjusting
1,620 kHz T351
522 kHz (fL): T306
1.1 ± 0.1 V
153 kHz (fL): T305
1.1 ± 0.1 V
990 kHz (fL): T302
225 kHz (fL): T301
Output: TP301
,
FM
Preset No.
87.50 MHz 6
108.00 MHz 7
98.00 MHz 8
90.00 MHz 9
106.00 MHz 10
LW
153 kHz
281 kHz
225 kHz
162 kHz
261 kHz
Display
Adjusting
Parts
98.00 MHz VR351*1
Display
Check Point
2.2 V ± 0.7 V
87.5 MHz
7.3 V ± 1.0 V
108 MHz
Instrument
Connection
Parts
*1
*2
*2
*1
*1
button to use it
MW
522 kHz
1,620 kHz
990 kHz
603 kHz
1,404 kHz
Instrument
Connection
Input: SO301
Output: Speaker
Terminal
Instrument
Connection
TP301
TP301