MHC-W555, STR-W555 - Sony Audio Service Manual (repair manual). Page 10

Read Sony MHC-W555 / STR-W555 Service Manual online

– 10 –

Procedure:
1. Supply a 25 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=1
µ
V
Note 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
Note 2:
No adjustment is needed for a tuner pack except for AEP,
UK, German, East European, CIS models.
AM Tuned Level Adjustment
(AEP, UK, East European, CIS model only)

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.
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
(AEP, UK, East European, CIS model only)

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

Setting:
Band: FM
FM ANTENNA terminal (TM1)
FM RF SSG
75 
Ω
 coaxial
Carrier frequency: 98MHz
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
Output level:
25dB (at 75 
Ω
 open)
set
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
30% amplitude
modulation by
400Hz signal
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
60cm
AM antenna
terminal (TM1)
set
Field strength dB (
µ
V/m) = SSG output level dB (
µ
V/m) –26dB.
RV41
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21

Adjustment Location
[TCB BOARD] (Component Side)
SECTION 4
ELECTRICAL ADJUSTMENT

Display

Click on the first or last page to see other MHC-W555 / STR-W555 service manuals if exist.

Random: