Adjustment; Mechanism Section; Tuner Section; Adjustment Points - Sharp CD-C470HCD-C470E 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
Test Tape Adjusting
Normal MTT-111 VRM1
speed
VRM1
TAPE MECHANISM PWB
R357
TP302
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
Point
3,000 ±
Speaker
30 Hz terminal
TAPE
SPEED
VR351
T351
AM IF
MW BAND
COVERAGE
LW BAND
COVERAGE
Figure 11-1 ADJUSTMENT POINTS
CD-C470H,C470E,C480H/CP-C470H,C470E,C480H

ADJUSTMENT

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
IF
MW Band
Coverage
MW
Tracking
LW Band
Coverage
LW
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
98.00 MHz
(25 dBµV)
TUNER PWB
FM MUTE
LEVEL
FE301
T306
T305 T302
MW
TRACKING
– 11 –
Frequency
Display
450 kHz 1,620 kHz
— 522 kHz
990 kHz 990 kHz
— 153 kHz
225 kHz 225 kHz
Frequency Adjusting
Display Parts
98.00 MHz VR351*
TP301
T301
CNP301
LW
TRACKING
Setting/
Instrument
Adjusting
Connection
Parts
T351 *1
(fL): T306 *2
1.1 ± 0.1 V
(fL): T302 *1
(fL): T305 *2
1.5 ± 0.1 V
(fL): T301 *1
Instrument
Connection
Input: Antenna
Output: Speaker
Terminal
SO301
ANTENNA
TERMINAL