Sony WRR-862A Service Manual page 88

1
2
3
4
5
A B
RX-74 (2/3), CN-2288 (2/2)
. . . . . AF level diagram
[dBu]
+10
0
_10
_20
_30
_40
_50
_60
_70
_80
Tuner 2: IC291-21pin
FL401
CN1952 CN1951 CN401
R402 R404
CL401 27 27
1 1 1 1 HF 5
IN OUT
2 FG2 FG3
FG1 G1 G2 G3 G4 G5 G6 FG4
5 4 3 2
2 3 4 5 R403
9 10 2 3 4 6 7 8 11 12
33
CN-2288 (2/2)
2 1 2 1
TB401 TB402
* :
Ref No.
C403
Model
CE21/U14 4 pF
CE33/U3032/U4244 4 pF
CE62/CE67/
4 pF
U6264/U6668/AU66
8-10
C D
RX-74 (2/3), CN-2288 (2/2)
+6.0 +6.0
+6.0
_1.0
_17.5 (
_20.4 ( , ) _19.1 (
_20.6 ( )
_23.8 ( _23.8 (
) )
_24.1 ( ) _24.1 ( )
_23.6 (
_36.7 (
) _33.8 ( _34.2 (
) )
_37.3 (
)
_37.5 ( )
Note :
• The AF level shows the value when the following reference signal is
supplied to the ANT a and b connectors from a FM SSG.
: RF level input 60 dBu, ± 5 kHz deviation at 100 Hz modulation
: RF level input 60 dBu, ± 5 kHz deviation at 1 kHz modulation
: RF level input 60 dBu, ± 5 kHz deviation at 10 kHz modulation
0 dBu = 1 uV (at no load)
0 dBu = _113 dBm (0 dBm = 1 mW, 50Z load)
0 dBm= 0.775Vrms
A B C D
IC701-1pin IC741-1pin IC741-7pin IC761-1pin
IF-ICDISCRI HEAD AMP De-emphasis LPF Pre-emphasis
(50 us OUT) (330 us OUT)
OUT OUT OUT
FB401
1/3 RF_1-B
BK1608TS601
IC401
L403 * *
C408
MAX2640EUT-TG069
3.2V
C404
6 FL402
220pF
*
* CH C406 L404 *
L402
1 4 5 HF 1
OUT IN
5 FG3 FG2 R401
FG4 G6 G5 G4 G3 G2 G1 FG1
C405 3
100
*
C403 2 3.1V C407 *
220pF 12 11 8 7 6 4 3 2 10 9
0.8V
CH
L402 C406 C407 L403 L404 C408
39 nH 15 pF 5 pF 12 nH 12 nH 4 pF
27 nH 15 pF 5 pF 10 nH 10 nH 4 pF
18 nH 15 pF 3 pF 8.2 nH 8.2 nH 2 pF
8-10
E F
+9.0 +9.0
+6.0 +6.0 +6.0
Clip level
)
)
_32.2 (
)
_37.8 (
)
)
_39.6 ( )
_42.2 (
)
_40.5 (
)
_43.5 (
)
_43.2 ( )
_57.3 (
_58.0 ( )
_58.0 (
_59.3 (
)
_77.3 (
E F G H J
IC771-6pin IC771-7pin T1101-1pin CN1902-2pin (CN-2168 board)
Expander De-emphasis Transformer OUTPUT
(330 us OUT) (Balanced 600 Z)
OUT Priminaly
RF_2-B
G
)
)
)
WRR-862A/862B
H