Adjustment - Sharp CD-C470H Service Manual

MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412
• Torque Check
Torque Meter
Play: TW-2111 30 to 60 g. cm
Fast forward: TW-2231 —
Rewind: TW-2231 —
• Tape Speed
Adjusting
Test Tape
Point
Normal MTT-111 VRM1
speed
TAPE
SPEED
VRM1
TAPE MECHANISM PWB
R357
TP302
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CD-C470H,C470E,C480H/CP-C470H,C470E,C480H

ADJUSTMENT

Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
Specified Value
Tape 1
Tape 2
30 to 100 g.cm
50 to 100 g.cm
50 to 100 g.cm
Specified Instrument
Value Connection
3,000 ±
Speaker
30 Hz terminal
VR351
FM MUTE
T351 LEVEL
AM IF
MW BAND
COVERAGE
LW BAND
COVERAGE
Figure 11-1 ADJUSTMENT POINTS
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
MW 990 kHz
Tracking
LW Band —
Coverage
LW 225 kHz
Tracking
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Frequency
Display
98.00 MHz 98.00 MHz
(25 dBµV)
TUNER PWB
TP301
FE301
T306
T305 T302 T301
MW LW
TRACKING TRACKING
– 11 –
Frequency Setting/ Instrument
Display
Adjusting Connection
Parts
1,620 kHz T351 *1
522 kHz (fL): T306 *2
1.1 ± 0.1 V
990 kHz (fL): T302 *1
153 kHz (fL): T305 *2
1.5 ± 0.1 V
225 kHz (fL): T301 *1
Adjusting Instrument
Parts Connection
VR351* Input: Antenna
Output: Speaker
Terminal
SO301
ANTENNA
TERMINAL
CNP301