HCD-N555AVK, LBT-N555AVK - Sony Audio Service Manual (repair manual). Page 13

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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 or 1050 kHz .
3. Adjust RV41 (EA model), RV42 (other model) to the point
(moment) when the TUNED indicator will change from going off
to going on.

Adjustment Location : TCB board
FM Tuned Level Adjustment

Note : This adjustment should be performed after the AM Tuned
Level Adjustement.

Setting :
Band : FM
Adjustment Location
EA model
[TCB BOARD] 
(Component Side)
loop antenna
(Supplied accessories)
AM RF SSG
30% amplitude
modulation by
400 Hz signal
AM antenna
terminal (TM1)
60 cm
Field strength dB (µV/m)=SGG output level dB (µV/m)–26dB.
Carrier frequency : 999kHz (at 9kHz step)
1050kHz (at 10 kHz step)
• Abbreviation
EA
: Saudi Arabia model
75  coaxial
Carrier frequency : 98MHz
Modulation
: AUDIO 1kHz, 75kHz
  deviation (100%)
Output level
: 25dB (at 75  open)
set
FM ANTENNA terminal
(TM1) (75 )

Procedure :
1. Supply a 25dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 (EA model), RV41 (other model) to the point
(moment) when the TUNED indicator will change from going off
to going on.

Adjustment Location : TCB board
TUNER SECTION     0dB=1µV

Note : As a front-end (FE1) is difficult to repair if faulty, replace it
with new one.
AM Tuned Level Adjustment

Note : FM Tuned Level adjustment should be performed after this
AM Tuned Level adjustment.

Setting :
Band : AM or MW
loop antenna
RV41
IC41
RV42
RV42
FM Tuned Level
FE1
TM1
RV41
FM Tuned Level
IC2
RV41
RV42
AM Tuned Level
FE1
TM1
RV41
AM Tuned Level
RV42
FM RF SSG

Other model
[TCB BOARD] (Component Side)

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