XL-MP40H
2 – 1
AudioXL-MP40HService ManualXLMP40HMarketE
CHAPTER 2. ADJUSTMENTS
[1] ADJUSTMENT
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
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Torque Meter Specified Value
Play: TW-2412 Over 80 g
Torque Meter Specified Value
Play: TW-2111 30 to 60 g.cm
Fast forward: TW-2231 55 to 140 g.cm
Rewind: TW-2231 55 to 140 g.cm
Test Tape Adjusting
Point
Specified Value Instrument
Connection
MTT-111 Variable Resis-
tor in motor.
3,000 ± 30 Hz Headphone
Terminal
Figure 1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz L305 *1
AM Band
Coverage
— 522 kHz (fL): L306
1.1 ± 0.1 V
*2
AM Tracking 990 kHz 990 kHz L302 *3
*1. Input: IC301 1Pin Output: IC301 23Pin
*2. Input: Input is not connected Output: TP-VT (IC301 28Pin)
*3. Input: Antenna Output:IC301 23Pin
Frequency Display Check Point Instrument
Connection
87.5 MHz 87.5 MHz 1.5V ± 1.0V TP-VT
108 MHz 108 MHz 5.0V ± 1.0V TP-VT
TAPE MECHANISM
M901
Tape
Motor
Variable
resistor
in motor
Frequency Display Adjusting
Parts
Instrument
Connection
98.00 MHz
(30 dBµV)
98.00 MHz - Input: CNP301
Output: Speaker Terminal
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM IF 10.7 MHz 98.00 MHz - Input: Pin 36 of
IC301
Output: Pin 23
of IC301
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM Band
Coverage
— 87.50 MHz (fL): L307
1.5 ± 0.1 V
*1
FM RF 98.00 MHz
(10 ~ 30dB)
98.00 MHz L304 *1
*1. Input: Antenna Output: 23 Pin of IC301
Figure 2 ADJUSTMENT POINTS
AM ANT.
FM OSC.
TP-VT=28Pin
28 2336
AM BAND
COVERAGE fL
FM RF
AM
Tracking
FM BAND
COVERAGE fL
MAIN PWB-A1
AM IF
