Adjustment - Sharp XL-520W 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
T302
AM
TRACKING fL
CNP301
L302
FM BAND
COVERAGE fL
1
SO301
ANTENNA
TERMINAL
IC301
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 Socket
M901
Motor
T306 AM BAND
COVERAGE fL
TP302
FM MUTE
LEVEL
TP301
T304
T351
FM IF
VR351
AM IF
L303 FM RF
MAIN PWB
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage Frequency
Band —
Coverage
RF 98.00 MHz
(10-30 dB)
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker Terminal
• Detection
Signal generator: 10.7 MHz, FM sweep generator
Test Frequency
Stage
IF 10.7 MHz
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
IF 450 kHz
Band —
Coverage
Tracking 990 kHz
*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 87.50 MHz
2 108.00 MHz
3 98.00 MHz
4 90.00 MHz
5 106.00 MHz
11~40
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Display
98.00 MHz 98.00 MHz
(25 dBµV)
*Adjust so that an output signal appears.
– 9 –
XL-520W/CP-520
Frequency Setting/
Display Adjusting
Parts
87.50 MHz (fL): L303
3.4 ± 0.1 V
98.00 MHz L302
Frequency Setting/
Display Adjusting
Parts
98.00 MHz T304(Turn
the core of IC301
T304 fully
counter-
clockwise.
Frequency
Setting/
Display
Adjusting
Parts
1,602 kHz T351
531 kHz (fL): T306
1.1 ± 0.1 V
990 kHz (fL): T302
Output: TP301
, button to use it
FM Preset No.
6
7
8
9
10
Adjusting
Parts
VR351* Input: SO301
Output: Speaker
Terminal
Instrument
Connection
*1
*2
Instrument
Connection
Input: Pin 1 of
Output: TP302
Instrument
Connection
*1
*2
*1
AM
531 kHz
1,602 kHz
990 kHz
603 kHz
1,404 kHz
Instrument
Connection