Read Sony SRF-M85 Service Manual online
SRF-M85
12
12
SRF-M85
IC101
TB2141FNG (O, EL)
•
IC Block Diagrams
– MAIN Board –
IC201
TA2179FNG (EL)
22
MODE1
1
TV RF IN
16
LPF2A
17
LPF2B
18
IF OUT
19
IF REQ
20
ST SW
2
FM RF IN
1st MIX
I-MIXER
TV RF
AMP
FM RF
AMP
FM IF
AMP
FM IF
FILTER
LEVEL
DETECT
LPF
FM DET
PHASE
SHIFT
PHASE
COMPARATOR
FREQENCY
VCO
Q-MIXER
10
DET-OUT
9
GND
8
AM-IF PASS
7
FM-IF PASS
13
LPF1B
12
LPF1A
5
VCC
4
FM AGC
3
RF GND
6
AGC
11
MPX-IN
15
L-OUT
PHASE
SHIFT
2nd MIX
I-MIXER
AM RF
AMP
AM IF
AMP
IF
BUFFER
AM IF
FILTER
AM DET
PHASE
SHIFT
Q-MIXER
PHASE
SHIFT
MONO/STEREO
CONTROL
23
MODE2
24
TV-FM OSC
27
AM RF-IN
28
AM BYPASS
26
RF VCC
MODE
CONTROL
TV/FM
OSC
25
AM OSC
29
FM RF-OUT
30
TV RF-OUT
AM
OSC
1/2
OSC
BUFFER
STEREO
DECODER
BAND PASS
FILTER
LPF
14
R-OUT
LPF
AGC
21
OSC OUT
1/4
1/2
FM: 1/8
TV: 1/4
1
INA
2
INB
3
VREF
4
PW SW
8
LPF
7
GND
12
MONO/ST SW
11
PW INC
10
BST OUT
9
BST NF
24
RF IN
23
VREF IN
RF & REF
22
RF OUT
13
OUTPUT SW
21
BASE
20
VCC
19
OUTA
14
AGC DET
+
–
PWA
16
OUTB
15
AGC IN
+
–
PWB
18
OUTC
17
PW GND
PWC
AGC DET
MODE SW
+
–
BST
5
PW MUTE
6
BST SW
PW SW, PW MUTE, BST SW
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