Adjustment - Sharp CD-E500 Service Manual

CD-E500
CD-E55/E44
MECHANISM SECTION
• • • • • Driving Force Check
Torque Meter
Play: DM-300
• • • • • Torque Check
Torque Meter
Play: DM-300 10 to 20 g.cm
Fast forward: DM-300 —
Rewind: DM-300 —
• • • • • Tape Speed
Test Tape Adjusting
Point
Tape TCC-119 Variable
speed Resistor in
motor.
TAPE MECHANISM
Variable Resistor in Motor
Figure 10-1
VR351
T351
AM IF
FM MUTE
Level
TP302
T306
R356
R357
AM BAND
COVERAGE fL
Figure 10-2 ADJUSTMENT POINTS

ADJUSTMENT

Specified Value
Tape 1: Over 80 g
Tape 2: Over 80 g
Specified Value
Tape 1 Tape 2
10 to 20 g.cm
Over 50 g.cm
Over 50 g.cm
Specified Instrument
Value Connection
3,000 ± 30 Hz
Speaker
Terminal
(Load
resistance:
8 ohms)
Tape
Motor
MAIN PWB
1 22
20
R381
TP301
11 12
L303
FM BAND
COVERAGE fL
T304
FM IF
1
L302
FM RF
T302
AM TRACKING
fL
TUNER SECTION
fL: Low-range frequency
fH: High-range 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
*2. Input: Antenna
• • • • • FM RF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Test Stage Frequency Frequency
FM Band —
Coverage
FM RF 98.00 MHz 98.00 MHz
(10-30 dB)
*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker Terminal
• • • • • FM IF
Signal generator: 10.7 MHz, FM modulated
Test Stage Frequency Frequency
IF 10.7 MHz
*1. Input: Antenna
• FM Mute Level (FM ST MODE)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Frequency Display
98.00 MHz 98.00 MHz
(26 dBµV)
*1. Adjust so that an output signal appears.
– 10 –
Frequency Setting/ Instrument
Display Adjusting
Connection
Parts
1,720 kHz T351 *1
530 kHz (fL): T306 *2
1.1 ± 0.1 V
990 kHz (fL): T302 *1
Output: TP302
Output: TP301
Setting/ Instrument
Display Adjusting
Connection
Point
87.50 MHz L303 (fL): *1
1.3 V ± 0.1 V
L302 *2
Setting/ Instrument
Display Adjusting
Connection
Point
98 MHz T304 *1
(Turn the
core of trans-
former T304
fully counter-
clock wise)
Output: TP301
Adjusting
Instrument
Parts
Connection
VR351*1 Input:CNP301
Output: Speaker
Terminal