– 13 –
XL-3000V
ADJUSTMENT
TUNER SECTION
AM
GND
FM
75
OHMS
ANTENNA
TERMINAL
SO301
T302
IC301
T306
T304
IC303
T351
L303
L302
VR351
TP301
FM Mute
Level
AM Band
Coverage fL
FM Band
Coverage fL
AM
Tracking fL
AM IF
FM IF
FM OSC.
FM ANT.
FM RF
IC302
20
TUNER PWB-A2
1
Adjusting
Parts
Display
Frequency
• Setting the Test Mode
Keeping the FF/PRESET UP button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.
Preset No.
FM
Preset No.
AM
1
87.50 MHz
6
531 kHz
2
108.00 MHz
7
1,602 kHz
3
98.00 MHz
8
990 kHz
4
90.20 MHz
9
612 kHz
5
106.00 MHz
10
1,404 kHz
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
Check Point
Instrument
Connection
Display
Frequency
87.5 MHz
87.5 MHz
3.4 V
±
0.1 V
TP301
108 MHz
108 MHz
7.8 V
±
1.0 V
TP301
• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*1
Input: SO301
(25
±
1 dB
µ
V)
Output: Speaker
Terminal
Instrument
Connection
*1. Input: Antenna,
Output: Speaker Terminal
*2. Input: Input is not connected,
Output: TP301
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF
450 kHz
1,602 kHz
T351
*1
AM Band
—
531 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM
990 kHz
990 kHz
(fL): T302
*1
Tracking
fL: Low-range frequency
fH: High-range frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
Figure 13-1 ADJUSTMENT POINTS
*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker Terminal
Frequency
FM Band
—
87.50 MHz
(fL): L303
*1
Coverage
3.4
±
0.1 V
FM RF
98.00 MHz
98.00 MHz
L302
*2
(10~30 db)
Signal generator: 1 kHz, 75 kHz dev., FM modulated
• FM RF
• FM Detection
Signal generator: 10.7 MHz, FM sweep generator
Display
Setting/
Adjusting
Parts
Instrument
Connection
Frequency
FM IF
10.7 MHz
98.0 MHz
T304(Turn
Input: Pin 1 of
the core of
IC301
T304 fully
counter-
clockwise.)
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection