10
In 1
6
Ch 1 input
Out 2 (+)
12
Ch 2 output (+)
4. N301: Vertical output (STV8172A)
Symbol
PIN Function
Symbol
PIN
Function
INV IN
1
Input
PUMP UP
6
Pump up power
INV IN
2
Input
V OUT
7
Vertical output
Vcc
3
Pump up power
V PRO
8
Vertical protection
V OUT
4
Vertical output
V FEEDBACK
9
Vertical feedback
GND 5
Ground
5. U101
：
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
5Vpp
0.9Vpp
1.3Vpp
H
H
1Vpp
V
CRT KB
CRT KG
CRT KR
95Vpp
95Vpp
95Vpp
H
H
H
TDA8378IN53
2.5Vpp
2.5Vpp
3.8Vpp
H
H
H
TDA8378N52
TDA8378IN51
TDA8378IN33
TDA8378IN34
0.8Vpp
V
TDA8378IN21
TDA8378IN22
TDA8378IN59
1.2Vpp
2.6Vpp
H
H
TDA8378IN40
TDA8378IN38
