Sharp CD-ES900 User Manual

CD-ES900/CD-ES99
2 – 1
CD-ES900/CD-ES99CD-ES900/CD-ES99Service ManualCD-ES900/CD-ES99MarketE
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section
• Driving Force Check
• Torque Check
• Tape Speed
[2] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
•FM RF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
•FM IF
Signal generator: 10.7 MHz, FM modulated
Torque Meter Specified Value
Play: TW-2111 Tape 1: Over 80 g
Tape 2: Over 80 g
Torque Meter Specified Value
Tape 1 Tape 2
Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
— 70 to 180 g.cm
Test Tape Adjusting
Point
Specified
Value
Instrument
Connection
Normal
speed
MTT-111 Variable
Resistor in
motor.
3,000 ± 30 Hz
Speaker
Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 1
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,720 kHz T351 *1
AM Band
Coverage
— 530 kHz (fL): T306
1.1 ± 0.1 V
*2
AM
Tracking
990 kHz 990 kHz (fL): T303 *1
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM Band
Coverage
— 87.50 MHz T301 (fL):
1.3 V ± 0.1 V
*1
FM RF 98.00 MHz
(10-30 dB)
98.00 MHz L312 *2
*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Point
Instrument
Connection
IF 10.7 MHz 98 MHz T302
(Turn the core of
transformer T302
fully counter-
clockwise)
*1
Figure 2 ADJUSTMENT POINTS
AM IF
FM RF
TP301
TP302
FM IF
T301
T302
R356
R381
T303
T306
IC301
L312
T351
CNP301
AM LOOP
ANTENNA
SO302
FM ANTENNA
TERMINAL
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
AM TRACKING
fL
MAIN PWB
1

Sharp CD-ES900 Specifications

General

Brand	Sharp
Model	CD-ES900
Category	Stereo System
Language	English