Sharp CD-C422 User Manual

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CD-C422/C422C/C2800/C2800C
CF351
T301
IC302
T382
T302
CF301
IC301
L301
L312
CNP301
3
2
1
TP302
TP303
TP301
T333
VR381
T331
IC303
1
1
1
FM BAND
COVERAGE fL
FM RF
FM
AM LOOP ANTENNA
FM IF
AM TRACKING
fL
VCO
AM IF
FM DET
AM BAND
COVERAGE fL
13
17 21
20
MAIN PWB
MECHANISM SECTION
• Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
• Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 60 to 120 g.cm
Rewind: TW-2231 — 60 to 120 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal MTT-111 Volume in 3,000 ± Speaker
speed motor. 30 Hz terminal
(MM1) (Load
resistance:
8 ohms)
ADJUSTMENT
Specified Value
Tape 1
• Tape Speed
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
IF 450 kHz 1,720 kHz T381 *1
Band — 530 kHz (fL): T333 *2
Coverage 1.1 ± 0.1 V
Tracking 990 kHz 990 kHz (fL): T331 *1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker terminal
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Band — 87.50 MHz T301(fL): *1
Coverage 1.3 V ± 50 mV
RF 98.00 MHz 98.00 MHz L312 *2
(10-30 dB)
Test Stage
Instrument
Connection
Frequency
Frequency
Display
Serring/
Adjusting
Point
• Detection
Signal generator: 10.7 MHz, FM sweep generator
Detection 10.7 MHz 98.00 MHz T382 Input: Pin 1 of
IC303
Output: TP302
IF 10.7 MHz 98.00 MHz T302(Turn Input: Pin 1 of
the core of IC301
transformer Output: TP302
T381 fully
counter-
clookwise.)
Instrument
Connection
Test
Stage
Adjusting
Parts
Frequency
Display
Frequency
Adjusting
Parts
Instrument
Connection
Frequency
Display
Frequency
• VCO Frequency
* Adjust for 76 kHz ± 200 Hz.
Notes:
After preparing the test circuit shown in Fig 11-2, connect the
Pin 13 , Pin 21 and ground of the IC303 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.
Pin 13 of IC303
Pin 21 of IC303
D
G
S
10 kΩ
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
Figure 11-2
TAPE MECHANISM
MM 1
Motor
Volume in motor
98.00 MHz 98.00 MHz VR381* Pin 13, Pin 21
(60 dB) and ground
of IC303
Figure 11-1 ADJUSTMENT POINTS

Sharp CD-C422 Specifications

General

Brand	Sharp
Model	CD-C422
Category	Stereo System
Language	English