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Sony HCD-D670AV - Compact Disk Deck Receiver - Tuner Section Adjustments; AM Tuned Level Adjustment; FM Tuned Level Adjustment

Sony HCD-D670AV - Compact Disk Deck Receiver
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— 14 —
RV41
AM Tuned Level
RV42
FM Tuned Level
IC41
Procedure :
1. Set the output of SGG so that the input level of the set becomes 55
dB.
2. Tune the set to 999 kHz or 1050 kHz .
3. Adjust RV41 (AEP, UK, IT, G models), RV42 (other models) 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
AEP, UK, G, IT model
[TCB BOARD] (Component Side)
Other model
[TCB BOARD] (Component Side)
RV42
AM Tuned
Level
RV41
FM Tuned Level
loop antenna
(Supplied accessories)
AM RF SSG
30% amplitude
modulation by
400 Hz signal
AM antenna
terminal (TM1)
60 cm
Field strength dB (
µ
V/m)=SGG output level dB (
µ
V/m)–26dB.
Carrier frequency : 999kHz (at 9kHz step)
1050kHz (at 10 kHz step)
Abbreviation
G : German model
IT : Italian model
FM RF stereo signal
generator
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 (AEP, UK, IT, G models), RV41 (other models) to
the point (moment) when the TUNED indicator will change from
going off to going on.
Adjustment Location : TCB board
FE1
TM1
FE1
TM1
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
IC2

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