Tuner Section - Sony HCD-F50 Service Manual

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[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Conductor Side)
RECORD
BAIS
R L
RV301 ® L
RV441 RV341
RV401 ® R
PB LEVEL
– DECK B –
TE
L 13942296513

TUNER SECTION

(HCD-FR1: AEP, UK, German model only)
Note: As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
AM Section Adjustment
Setting:
loop antenna A
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
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RV1501
CN207
IC1501
RV1551
CN205
TAPE SPEED
(NORMAL)
(HIGH)
RV651
RV652
®
®
RV311
PB L ®
LEVEL RV411
R ®
– DECK A –
0dB=1µV
loop antenna B
AM ANTENNA
terminal (TM1)
60 cm
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8
AM Tuned Level Adjustment
Band: AM or MW
Procedure:
1. Set the output of SSG so that the input level of the set be-
comes 55 dB.
2. Tune the set to 999 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indica-
tor 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:
Carrier frequency : 98 MHz
Modulation
FM Tuned Level Adjustment
Band: FM
Procedure:
1. Supply a 25dBµ 98 MHz signal from the ANTENNA termi-
nal.
Q Q
2. Tune the set to 98 MHz.
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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
[TCB BOARD] (Component Side)
RV42
set
co
.
– 41 –
9 4 2 8
FM RF stereo signal
generator
75 Ω coaxial
: AUDIO 1 kH, 75 kHz
FM ANTENNA terminal
deviation (100%)
(TM1) (75 Ω open)
0 5 8 2 9 9 4 2 8
IC41
RV41
TM1
FE1
m
9 9
set
9 9