Sharp CD-C250X BK - ADJUSTMENT PROCEDURES; Tuner and Mechanism Section Adjustments

CD-E;5:0;6OX
ADJUSTMENT
MECHANISM SECTION
l Driving Force Check
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
l AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage / Frequency
Frequency
Setting/
Instrument
Display Adjusting Connection
Parts
IF 450 kHz
1,602 kHz or T351
*1
1,620 kHz
Band -
531 kHz or (fL): T304 *2
Coverage 530 kHz
1.1 IO.1 v
Tracking 990 kHz 990 kHz
(fL): T302 *1
*l. Input: Antenna,
Output: TP302
*2. Input: Antenna,
Output: TP301
l FMRF
Signal generator: 1 kHz, 22.5 kHz dev., FM modulated
Test Stage Frequency Frequency
Serringl
instrument
Display
Adjusting 5
Connection
Point
Band -
87.50 MHz L303(fL):
*1
Coverage
185Vi:50 mV
RF
98.00 MHz 98.00 MHz L302
l 2
(1 O-30 dB)
*l. Input: Antenna,
Output: TP301
*2. Input: Antenna,
Output: Speaker terminal
.-FM IF
Signal generator: 10.7 MHz, FM sweep generator
Torque Meter
Play: TW-2412
Specified Value
Tape 1: Over 80 9
Tape 2: Over 80 g
l Tot-clue Check
Torque Meter
Specified Value
Tape
1 Tape 2
Plav: TW-2111
30 to 60 g.
cm 30 to 60 acm
1 Fast forward: TW-2231
1 160to120gcm 1
1 Rewind: TW-2231
I
/60to120gcm /
l Tape Speed
I
Test Tape
Adjusting
Specified Instrument
Point
Value
Connection
Volume in
motor.
3,000 i:
30 Hz
Speaker
terminal
(Load
resistance:
6 ohms)
Normal
speed
MTT-111
f
j TAPE MECHANISM 1
l FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency
Frequency
Adjusting
Display Parts
Instrument
Connection
98.00 MHz
(25 dBbV)
98.00 MHz
1 VR35’*
* Adjust so that an output signal appears.
/ TUNER PWB (
IC301
FM ANTENNA
TERMINAL
1 FM IFI
L302
1
AM
ANTENNA
TERMINAL
Figure 10-l ADJUSTMENT POINTS