Sharp CD-E55 Service Manual - Page 10

Adjustment

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CD-E500 CD-E55/E44 ADJUSTMENT MECHANISM SECTION TUNER SECTION • Driving Force Check Torque Meter Play: DM-300 Specified Value Tape 1: Over 80 g Tape 2: Over 80 g fL: Low-range frequency fH: High-range frequency • AM IF/RF Signal generator: 400 Hz, 30%, AM modulated • Torque Check Torque Meter Specified Value Test Stage Frequency Frequency Setting/ Instrument Display Adjusting Connection Parts Play: DM-300 Fast forward: DM-300 Rewind: DM-300 • Tape Speed Tape 1 10 to 20 g.cm - - Tape 2 10 to 20 g.cm Over 50 g.cm Over 50 g.cm AM IF 450 kHz AM Band - Coverage AM Tracking 990 kHz *1. Input: Antenna *2. Input: Antenna 1,720 kHz T351 *1 530 kHz (fL): T306 *2 1.1 ± 0.1 V 990 kHz (fL): T302 *1 Output: TP302 Output: TP301 Test Tape Adjusting Point Specified Instrument Value Connection • FM RF Signal generator: 1 kHz, 40 kHz dev., FM modulated Tape TCC-119 speed Variable Resistor in motor. 3,000 ± 30 Hz Speaker Terminal (Load resistance: 8 ohms) Test Stage Frequency Frequency Display Setting/ Instrument Adjusting Connection Point FM Band - Coverage 87.50 MHz L303 (fL): *1 1.3 V ± 0.1 V TAPE MECHANISM Variable Resistor in Motor FM RF 98.00 MHz 98.00 MHz L302 *2 (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 Display Setting/ Instrument Adjusting Connection Point Tape Motor IF 10.7 MHz 98 MHz T304 *1 (Turn the core of trans- former T304 fully counter- clock wise) *1. Input: Antenna Output: TP301 Figure 10-1 • FM Mute Level (FM ST MODE) Signal generator: 1 kHz, 40 kHz dev., FM modulated MAIN PWB TP302 T351 AM IF R356 R357 1 VR351 11 L303 FM BAND COVERAGE fL IC302 22 20 R381 TP301 12 IC301 FM MUTE Level T304 FM IF T306 AM BAND COVERAGE fL 1 L302 FM RF T302 AM TRACKING fL CNP301 Frequency Display Adjusting Parts Instrument Connection 98.00 MHz (26 dBµV) 98.00 MHz VR351*1 Input:CNP301 Output: Speaker Terminal *1. Adjust so that an output signal appears. Figure 10-2 ADJUSTMENT POINTS - 10 -

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CD-E500
CD-E55/E44
– 10 –
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
•
AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
AM IF
450 kHz
1,720 kHz
T351
*1
AM Band
—
530 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM Tracking
990 kHz
990 kHz
(fL): T302
*1
*1. Input: Antenna
Output: TP301
*2. Input: Antenna
Output: Speaker Terminal
•
FM RF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
FM Band
—
87.50 MHz
L303 (fL):
*1
Coverage
1.3 V
±
0.1 V
FM RF
98.00 MHz
98.00 MHz
L302
*2
(10-30 dB)
Test Stage
Instrument
Connection
Frequency
Frequency
Display
Setting/
Adjusting
Point
Figure 10-2 ADJUSTMENT POINTS
•
FM IF
Signal generator: 10.7 MHz, FM modulated
IF
10.7 MHz
98 MHz
T304
*1
(Turn the
core of trans-
former T304
fully counter-
clock wise)
Test Stage
Instrument
Connection
Frequency
Frequency
Display
Setting/
Adjusting
Point
*1. Input: Antenna
Output: TP301
ADJUSTMENT
MECHANISM SECTION
•
Driving Force Check
Torque Meter
Specified Value
Play: DM-300
Tape 1: Over 80 g
Tape 2: Over 80 g
•
Torque Check
Torque Meter
Tape 2
Play: DM-300
10 to 20 g.cm
10 to 20 g.cm
Fast forward: DM-300
—
Over 50 g.cm
Rewind: DM-300
—
Over 50 g.cm
Specified Value
Tape 1
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Tape
TCC-119
Variable
3,000
±
30 Hz
Speaker
speed
Resistor in
Terminal
motor.
(Load
resistance:
8 ohms)
•
Tape Speed
Figure 10-1
Tape
Motor
Variable Resistor in Motor
TAPE MECHANISM
FM IF
FM RF
VR351
FM MUTE
Level
T351
AM IF
T302
T306
T304
IC301
IC302
L303
L302
CNP301
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
AM TRACKING
fL
MAIN PWB
1
1
11
12
22
20
R381
R356
R357
TP301
TP302
Adjusting
Parts
Display
Frequency
• FM Mute Level (FM ST MODE)
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
98.00 MHz
98.00 MHz
VR351*1
Input:CNP301
(26 dB
μ
V)
Output: Speaker
Terminal
Instrument
Connection