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CD-MPX100E
2 – 1
Audio
CD-MPX100E
Service Manual
CD-MPX100E
Market
E
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
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
Adjust-
ing Point
Specified
Value
Instrument
Connection
Normal
speed
speed
MTT-111
Variable
Resistor in
motor.
Resistor in
motor.
3,000
± 30 Hz
Speaker
Speaker Ter-
minal (Load
resistance: 6
ohms)
minal (Load
resistance: 6
ohms)
Figure 1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
Coverage
Coverage
—
522 kHz
(fL): T306
1.1
1.1
± 0.1 V
*2
AM
Tracking
Tracking
990 kHz
990 kHz
(fL): T303
*1
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TAPE MECHANISM
Tape
Motor
Motor
Variable Resistor in motor
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Point
Instrument
Connection
FM Band
Coverage
Coverage
—
87.50 MHz
T301 (fL):
1.3 V
1.3 V
± 0.1 V
*1
FM RF
98.00 MHz
(10-30 dB)
(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/Adjust-
ing Point
Instrument
Connection
IF
10.7 MHz
98 MHz
T302 (Turn the
core of trans-
former T302
fully counter
clockwise)
core of trans-
former 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/FM
L
OOP
ANTENNA
FM BAND
COVERAGE fL
COVERAGE fL
AM BAND
COVERAGE fL
COVERAGE fL
AM TRACKING
fL
fL
MAIN PWB
1
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