Philips 32PF9968/10 Service Manual page 126
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EN 126
9.
Q522.1E LA
9.6.2
Diagram B03A, TDA9898HL (IC 7T57)
Block Diagram
SDA
SCL
i.c.
ADRSEL
23
24
14
25
2
I
C-BUS
TDA9897
AM average
36
AGCDIN
SIF AGC
FM peak
3
IF3A
4
IF3B
6
IF1A
VIF AGC
7
IF1B
9
IF2A
10
IF2B
DECODER
45
i.c.
PEAK
RSSI
AGC
DETECTOR
TUNER
AND
IF BASED
TUNER
47
TAGC
AGC
48
2, 5, 18, 37
8
GND
CTAGC
n.c.
Pin Configuration
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Circuit Descriptions, Abbreviation List, and IC Data Sheets
BVS
GNDD
32
22
SYNTHESIZER
AND VCO
sideband
Q
SIDEBAND
I
FILTER
sideband
I
NYQUIST
Q
FILTER
VIF
SOUND
2
I
C-BUS
CARRIER
VIF PLL
AFC
TOPNEG
TRAP
AND
ACQUISITION
HELP
SYNTHESIZER
2
I
C-BUS TOP2
AND RSSI
1
1
1
3
T
O
P
2
L
F
V
F I
optional tuner
AGC TOP for
IF based tuner
AGC and
radio signal
strength detector
onset
L
F
S
Y
N
2
1
. n
. c
2
F I
3
A
3
F I
3
B
4
(1)
CIFAGC
5
F I
1
A
6
F I
1
B
7
C
T
A
G
C
8
F I
2
A
9
F I
2
B
10
T
O
P
2
11
M
P
P
1
12
Figure 9-8 Pin configuration
LFSYN2
V
GNDA
P
1
43, 44
40, 41
SUPPLY
A
A
B
B
TDA9897
C
C
BAND-PASS
FILTER
D
D
E
E
GROUP
AM
DELAY
F
F
EQUALIZER
trap reference
standard
AND VCO
G
G
H
H
38
L
F
S
Y
N
1
36
A
G
35
. n
34
C
A
C
V
33
32
BVS
31
A
U
TDA9897HL
TDA9898HL
30
O
U
29
O
U
28
C
A
27
O
U
26
O
U
25
A
D
4 MHz reference
input
(2)
R
EXTERNAL SOUND
(1)
BAND-PASS FILTER
EXTFILO
EXTFILI
FREF
15
17
46
4 MHz FREQUENCY
REFERENCE
+3 dB
BP on/off
OUTPUT
SWITCH
FM SWITCH
FM
AMPLIFIER
FM CARRIER AGC
AM DEMODULATOR
FM
AND
TAGC
AM
FM NARROW-BAND PLL
SIF AGC
FM AGC
AFC
VIF AGC
2
I
C-bus
35, 42
19
LFFM
n.c.
C
D
N I
. c
F
2
B
S
D
T
2
B
T
2
A
F
1
T
1
B
T
1
A
R
S
E
L
(2)
R
OPTXTAL
39
29
OUT2A
30
OUT2B
26
OUT1A
27
OUT1B
21
EXTFMI
34
CAF2
20
CDEEM
31
AUD
28
CAF1
16
MPP2
33
CVBS
12
MPP1
port
H_16800_029.eps
111007
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