![background image](http://html.mh-extra.com/html/sony/hcd-d90av/hcd-d90av_service-manual_420613016.webp)
— 16 —
Band: FM
Procedure:
1. Supply a 25 dB or 23 dB 98 MHz signal from the ANTENNA
terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 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 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
Note 2:
No adjustment is needed due to a tuner pack for except
AEP, UK, German, East European, CIS models.
AM Tuned Level Adjustment
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
55 dB or 58 dB. (55 dB: Except East European, CIS model, 58
dB: East European, CIS model)
2. Tune the set to 999 kHz or 1,050 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 Tuned Level Adjustment
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
set
Carrier frequency: 98MHz
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
Output level:
25dB (at 75
Ω
open) (Except East European, CIS model)
23dB (at 75
Ω
open) (East European, CIS model)
FM RF SSG
loop antenna
Field strength dB (µV/m) = SSG output level dB (µV/m) –26dB.
AM RF SSG
30% amplitude
modulation by
400Hz signal
60cm
AM antenna
terminal (TM1)
loop antenna
(Supplied accessories)
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
set
Adjustment Location
[TCB BOARD] (Component Side)
TM1
IC21
RV41
AM Tuned Level
RV42
FM Tuned
Level
75
Ω
coaxial
FM ANTENNA terminal (TM1)