Read Sony SRS-RF90R / SRS-RF90RK / TMR-RF90 Service Manual online
13
13
SRS-RF90R/RF90RK/TMR-RF90
4-1. Block Diagrams
(SRS-RF90R)
• Signal path.
• R-ch is omitted due to same as L-ch.
: FM
: AUDIO
L101
FM
OSC
D101
+V
+V
FRONT END
FE UNIT
18
13
16
FM IF/
DISCRI
DECODE
AMP
DETUNE
MUTE
TUNING
IND
STEREO
IND
CF102
10.7MHz
26
CF101
10.7MHz
6
5
R-CH
10
7
10
15
2
IC202
POWER AMP
15
2
IC203
POWER AMP
Q105
MUTING
Q901
HPF
Q202,
D201, 202
LIMITER
TWIN-T
FILTER
Q107
BUFFER
22
20
FM FE
L102
+V
Q102
OSC
Q101
SWITCH
10
12
27
Q103
Q
Q
AUTO
BLEND
MUTE
MONO/ST
SW
1/2
COUNTER
PD1
PD1
VCO
21
REG
RV101
FREE RUN
FREQUENCY
IC101
IF AMP/DECODE
(ANT)
R-CH
SP1
(SPEAKER)
SP2
(SPEAKER)
SP3
(WOOFER)
S301
TUNE
RV301
VOL 2
(914MHz)
3
4
5
6
1
9
11
12
B6
B5
B4
B3
B2
B1
B0
CLK
+2.2V
IC102
COUNTER
R
64R
(DAC)
+5V
REG
IC105
D602
D601
D701
D204
CHARGE
POWER
POWER
POWER AMP B+
J801
DC IN 9V
Q204
RIPPLE
FILTER
Q203
LED
DRIVER
1
3
OFF
ON
S201
LIGHT
OFF
ON
S302
D203
Q104
+2.4V
REG
(REFLECTOR)
IC201, Q901
+2.4V
RECHARGEABLE BATTERY
(NICKEL-CADMIUM)
6PCS, 7.2V
R-CH
R-CH
R-CH
R-CH
+2.2V
IC103
COMP.
6
5
1
2
3
5
CK
D
6
CLR
7
2
3
1
IC104
D-FF
IC201
AMP
3
1
TRANSMISSION
FREQUENCY
L101
Click on the first or last page to see other SRS-RF90R / SRS-RF90RK / TMR-RF90 service manuals if exist.