WM-FX700/FX890/FX900
12
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
620kHz <621kHz>
CT1
1,400kHz <1,395kHz>
FM FREQUENCY COVERAGE CONFIRMATION
Frequency display
Reading on digtal voltmeter
Confirmation
108MHz
Standard value : 6.9 to 7.5V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
Confirmation
108MHz
TUNER SECTION
AM Section
BAND : AM
FM Section
BAND : FM
no mark : 10kHz step
< > : 9kHz step
AM FREQUENCY COVERAGE CONFIRMATION
Frequency display
Reading on digtal
voltmeter
Confirmation 620kHz <621kHz> Standard value : 1.1 to1.4V
Adjustment Location :
Main board (See page 13)
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
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
16
Ω
phones jack (J301)
level meter
Frequency Coverage Adjustment
Setting :
L4
AM
FERRITE BAR
Q1
CF1
FL1
BP1
ANT IN
IC
BP1
C15
L7
C20
R23
FM RF signal
generator
33.75kHz frequency
deviation by 1kHz signal.
Output level :
as low as possible
BP1
0.01
µ
F
MAIN BOARD
(SIDE B)
C30
L5
L1
D3
D4
C29
C37
C716
C17
TP
(VT)
C36
3
C16
R739
R8
R9
R6
R10
(TAP
S501-1
(TAPE DET)
MAIN BOARD
(SIDE B)
(VT)
digital voltmeter
(DC range)