Sanyo AVM-2550S Training Manual page 36

7.6V
VIF VCC
R207
C147
IF In 4
TP132
X141
C143
SAW
VIF AMP
10
VIF
R143
-1
11
IF
GND
9
7.6V
R142
TP11
RF
RF AGC
6
AGC
Out
C106
Write
6 bit
IC801
RF AGC
CPU
Delay
Data
BUS
32 44
SDA
Clock
BUS
34 43
SCL
AFT
29
S-Curve
7.6V
L166
R164
Internal
Video Out
L164
Selected External
Video Out Video In
X161
C139 Q162
R138
TP16
42 1 47
CLAMP
Video
SW
Video Det.
VIF VIF
-2 -3
- π / 4
APC Det. + π / 4
APC Det.
Adjust
Write
6 bit
IF AGC
Drive
Write
1 bit
IF AGC
SW
IF AGC
Filter
to BUS Line
BUS
Interface
46 12
BUS PIF AGC
TP12
GND Filter
C142 R151
C151
FM Trap
(88.1 ~ 91.9MHz)
X153
4.5MHz
R163 R159 BPF
C133
R169
45 49
LIM
AMP
Video
Level
Write
3 bit
B/N INV
W/N
AMP
INV
VCO
Buzz
Canceler
B: When PLL Unlocked.
B
A: When PLL Locked.
PLL Pull-in SW
A
Write
1 bit
N/I SW
IF Lock B/N
AGC Det INV
48
PIF APC
Filter
AFT Out
R168
IF System
– 33 –
T131
FM Coil
R133
IC101
SIGNAL PROCESSOR
52
Multiplier
+
FM
AMP
-
Write
+
5 bit
-
FM Level
3.8V
Write
Audio
7 bit SW
PLL Tuning
AFT
+
Volume
-
Write
1 bit
Write
Volume
1 bit D/A
AFT
Defeat
Audio
Mute
Write
6 bit
Volume
13
TP113
7.6V
R167 R161
R162 C161
FM Out
7
TP21
FM Filter
50
TP20
C131
T151
VCO Tank
2
3
N/C
5
(EXT Audio In)
N/C
51
(Audio Out)
N/C
8
(Vol. Filter)