11
8 +5V
Power
3. TV sound AM-demodulator and audio source switch (TDA9830)
Symbol PIN Function
Symbol
PIN
Function
IFIN
1
sound IF differential input signal
EXTIN
9
input signal (from external) to audio switch
n.c.
2
not connected
SWITCH
10
switch input select control
C
AGC
3
AGC capacitor
V
p2
11
supply v12 V (alternative)
C
REF
4
REF voltage filtering capacitor
MUTE
12
mute control
n.c.
5
not connected
GND
13
ground (0 V)
AMOUT
6
AM demodulator output
V
p1
14
supply v5 to +8 V
AMIN
7
input signal (from AM) to audio switch
n.c.
15
not connected
AFOUT
8
output signal from audio switch
IFIN
16
sound IF differential input signal
4. Vertical deflection booster (TDA4863AJ)
Symbol PIN Function
Symbol PIN
Function
VP1
1
positive supply voltage 1
V-OUT 5
vertical output
VP3 2
flyback generator output
INN
6
inverted input of differential input stage
VP2 3
supply voltage 2 for vertical output
INP
7
non-inverted input of differential input stage
GND 4
ground or negative supply voltage
5.Tuner
PIN Function
PIN Function
1 AGC
7 +5V
2 vacant
8 vacant
3 Gnd
9 Vt
33V
4 SCL
10 Gnd
5 SDA
11 IF
Out
6 +5V
6. Test point Waveforms
7. IC voltages
TDA9351
PIN 1 2 3 4 5 6 7 8 9 10
11
12
13 14 15 16
5Vpp
0.9Vpp
1.3Vpp
H
H
1Vpp
V
CRT KB
CRT KG
CRT KR
95Vpp
95Vpp
95Vpp
H
H
H
TDA9351PIN53
2.5Vpp
2.5Vpp
3.8Vpp
H
H
H
TDA9351 PIN52
TDA9351 PIN51
TDA9351 PIN33
TDA9351 PIN34
0.8Vpp
V
TDA9351 PIN21
TDA9351 PIN22
TDA9351 PIN59
1.2Vpp
2.6Vpp
H
H
TDA9351 PIN40
TDA9351 PIN38
