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XL-MP8H
2 – 1
XL-MP8H
Service Manual
CHAPTER 2.
ADJUSTMENTS
[1] ADJUSTMENT
1. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
• 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
*1. Adjust so that an output signal appears.
• FM Detection
• FM Detection
Signal generator: 10.7 MHz FM sweep generator
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF
450 kHz
1,620 kHz
T351
*1
AM Band
Coverage
Coverage
—
522 kHz
(fL): T306
1.1 ± 0.1 V
1.1 ± 0.1 V
*2
AM Tracking
990 kHz
990 kHz
T302
*1
*1. Input: Antenna
Output: Speaker terminal
*2. Input: Input is not connected
Output: TP-VT(TP301)
Frequency
Display
Check
Point
Instrument
Connection
87.5 MHz
87.5 MHz
2.2V ± 1.0V
TP301
108 MHz
108 MHz
7.8V ± 1.0V
TP301
Frequency
Display
Adjusting
Parts
Instrument
Connection
98.00 MHz
98.00 MHz
(30 dB
(30 dB
µV)
VR351*1
Input: CNP301
Output: Speaker Terminal
Output: Speaker Terminal
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM IF
10.7 MHz
98.00 MHz
T304(Turn
the core of
T304 fully
counter-
clockwise
the core of
T304 fully
counter-
clockwise
Input: Pin 1 of
IC301
IC301
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
FM Band
Coverage
Coverage
—
87.50 MHz
(fL): L303
3.4 ± 0.1 V
3.4 ± 0.1 V
*1
FM RF
98.00 MHz
(10 ~ 30dB)
(10 ~ 30dB)
98.00 MHz
L302
*2
*1. Input: Antenna Output: TP-VT(TP301)
*2. Input: Antenna Output: Speaker terminal
*2. Input: Antenna Output: Speaker terminal
Figure 1 ADJUSTMENT POINTS
R357
R356
TP302
CNP301
IC301
T302
L302
L303
T304
T306
VR351
T351
IC302
MAIN PWB-A1
FM
MUTE
LEVEL
AM IF
AM BAND
COVERAGE fL
AM TRACKING fL
FM RF
FM IF
FM OSC
TP-VT
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