Adjustment - Sharp CD-C1831V Service Manual

CD-C1831V
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 Variable
speed resistor in
motor.
(MM1)
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
AM IF 450 kHz
AM Band —
Coverage
AM 990 kHz
Tracking
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
TP302
R357
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
Point Connection
3,000 ±
Speaker
30 Hz terminal
Frequency Setting/ Instrument
Display Adjusting Connection
Parts
1,602 kHz T351 *1
531 kHz (fL): T306 *2
1.1 ± 0.1 V
990 kHz (fH): T302 *1
T351
AM IF
IC303
Figure 10 ADJUSTMENT POINTS

ADJUSTMENT

• 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)
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
Error
0001
0101
0105
0201
0203
0304
0305
0307
TUNER PWB
R336
VR351
FE301
FM MUTE
LEVEL
T306
AM BAND
COVERAGE
– 10 –
Adjusting
Frequency
Display Parts
98.00 MHz VR351
State Code
Cannot detect pickup-in SW
Tray close operation error
Tray close operation error
Tray open operation error
Tray open operation error
Disc skip operation error
Disc skip operation error
Disc skip operation error
TP301
T302
AM
TRACKING
Instrument
Connection
Input: Antenna
Output: Speaker
Terminal
SO301
ANTENNA
TERMINAL