Adjustment - Sharp CD-PC1881V Service Manual

CD-PC1881V
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 Variable
speed Resistor in
motor.
(MM1)
TAPE MECHANISM
Variable Resistor in motor
Figure 12-1
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ADJUSTMENT

Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
Specified Value
Tape 1
Tape 2
30 to 60 g.cm
60 to 120 g.cm
60 to 120 g.cm
Specified Instrument
Value
Connection
3,000 ±
Speaker
30 Hz terminal
(Load
resistance:
8 ohms)
MM 1
Motor
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 Tracking 990 kHz
*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)
AM IF
T351
IC303
TP302
R357
Figure 12-2 ADJUSTMENT POINTS
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
– 12 –
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
Adjusting Instrument
Parts Connection
VR351 Input: Antenna
Output: Speaker
Terminal
TUNER PWB
TP301
FM MUTE R336
SO301
LEVEL
ANTENNA
VR351
FE301 TERMINAL
AM
T306
TRACKING fH
AM BAND
T302
COVERAGE fL
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