Sharp XL-70 User Manual

XL-70/70C
– 12 –
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
Figure 12-2 ADJUSTMENT POINTS
MTT-111 Variable 3,000 ± Headphone
resistor in 90 Hz terminal
motor.(M901)
Adjusting
Parts
Display
Frequency
• Setting the Test Mode
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on POWER. Then, the frequency is initially set
in the memory as shown in Table. Call it with the JOG DIAL
knob to use it for adjustment and check of tuner circuit.
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
98.00 MHz 98.00 MHz VR351*1 Input: SO301
(30 dBµV) Output: Speaker
Terminal
Instrument
Connection
*1. Input: Antenna, Output: Speaker Terminal
*2. Input: Input is not connected, Output: TP301
Frequency
Frequency Display
Setting/
Adjusting
Parts
Instrument
Connection
AM 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 (fL): T302 *1
Tracking
fL: Low-range frequency
fH: High-range frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
FM Band — 87.5 MHz (fL): L303 *1
Coverage 3.4 ± 0.1 V
FM RF 98.00 MHz 98.0 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
Preset No.
FM STEREO Preset No.
AM
1 87.5 MHz 6 530 kHz
2 108.0 MHz 7 1,720 kHz
3 98.0 MHz 8 990 kHz
4 90.0 MHz 9 600 kHz
5 106.0 MHz 10 1,400 kHz
Preset No.
11~25
Preset No.
FM MONO
26 106.0 MHz
27 90.0 MHz
28 98.0 MHz
29 108.0 MHz
30 87.5 MHz
BAND
• FM Detection
Signal generator: 10.7 MHz, FM sweep generator
FM IF 10.7 MHz 98.0 MHz T304(Turn Input: Pin 1 of
the core of IC301
T304 fully
counter-
clockwise.)
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
Figure 12-1 ADJUSTMENT POINT
TAPE MECHANISM
M901
Tape
Motor
Variable
resistor
in motor
IC303
IC302
CF352
R336
T306
VR351
T302
T304
L303
IC301
L302
BF301
T351
1
9
MAIN PWB
AM
ANTENNA
SOCKET
FM Mute
Level
AM IF
TP301
CNP301
AM
Tracking fL
AM Band
Coverage fL
FM Band
Coverage fL
FM RF
FM IF
FM
ANTENNA
SOCKET
SO301

Sharp XL-70 Specifications

General

Brand	Sharp
Model	XL-70
Category	Stereo System
Language	English