Sony HCD-RX80, Service Manual, Page: 33 / 90

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TUNER SECTION 0 dB=1 µV
Note: As a front-end (FE1) is difficult to repair if faulty, replace it
with new one.
AM Section Adjustment
Setting:
AM Tuned Level Adjustment
Band: AM or MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
55 dB.
2. Tune the set to 999 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indicator
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:
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.
FM Tuned Level Adjustment
Band: FM
Procedure:
1. Supply a 25 dBµ 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV42 to the point
(moment) when the TUNED indicator will change from going
off to going on.
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Component Side)
RV42
IC41
RV41
TM1
FE1
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