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TUNER SECTION
0dB=1µV
Note: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
AM Section Adjustment
Setting:
(Except Thai model)
AM RF SSG
loop antenna
set
loop antenna
(Supplied accessories)
60 cm
AM ANTENNA
terminal (TM1)
30% amplitude
modulation by
400 Hz signal
Field strength dB (
µ
V/m) =SSG output level dB (
µ
V/m) –26 dB.
AM Tuned Level Adjustment
Band: AM
Procedure:
1. Set the output of SSG so that the input level of the set be-
comes 55 dB.
2. Tune the set to 999 kHz.
3. Adjust RV42 to the point (moment) when the TUNED indica-
tor will change from going off to going on.
Adjustment Location : TCB board
FM Section Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment due to the same adjustment element.
Setting:
Adjustment Location:
[TCB BOARD] (Component Side)
RV41
FM Tuned Level
Adjustment
IC2
RV42
AM Tuned
Level
Adjustment
TM1
FE1
Band: FM
Procedure:
1. Supply a 25dBµ 98 MHz signal from the ANTENNA termi-
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV41 to the
point (moment) when the TUNED indicator will change from
going off to going on.
Adjustment Location: TCB board
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kH, 75 kHz
deviation (100%)
FM ANTENNA terminal
(TM1) (75
Ω
open)
75
Ω
coaxial
set
FM RF stereo signal
generator
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