– 13 –
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digital
voltmeter
L4
530kHz
Adjustment value : 0.8V
Standard value : 0.76 – 0.84V
Confirmation
1,710kHz
Standard value : 4.4 – 5.2V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620kHz
CT2
1,400kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T2
10.7MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digital
voltmeter
Confirmation
87.5MHz
Standard value : 1.5 – 2.1V
L2
108MHz
Adjustment value : 4.2V
Standard value : 3.9 – 4.5V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz
TUNER SECTION
• FM Section
Setting :
RADIO BAND button : FM
• AM Section
Setting :
RADIO BAND button : AM
• Connecting Level Meter (FM and AM)
• Connecting Digital Voltmeter (FM and AM)
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
PHONES jack (J301)
32
Ω
level meter
(range : 0.5 – 5 V ac)
Adjustment Location : Main board (See page 14)
0 dB = 1
µ
V
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM RF signal
generator
75 kHz frequency
deviation by 1 kHz signal
Output level : as low as possible
FH1
(antenna terminal)
set
(Main board)
0.01
µ
F
digital
voltmeter
VT
(JW13)
100K
Ω