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In 1
6
4. N301: Vertical output (TDA8357A)
Symbol
PIN
INV IN
1
INV IN
2
Vcc
3
V OUT
4
GND
5
5. U101：Tuner
PIN
Function
1
AGC
2
vacant
3
Gnd
4
SCL
5
SDA
6
+5V
6. Test point Waveforms
2.6Vpp
H
TDA8377IN38
95Vpp
H
CRT KR
1Vpp
V
TDA8377IN21
7. IC voltages
Ch 1 input
Function
Input
Input
Pump up power
Vertical output
Ground
PIN
Function
7
+5V
8
vacant
9
Vt 33V
10
Gnd
11
IF Out
1.2Vpp
H
TDA8377IN40
TDA8377IN53
95Vpp
H
CRT KG
CRT KB
1.3Vpp
0.8Vpp
V
TDA8377IN22
TDA8377IN59
Out 2 (+)
Symbol
PUMP UP
V OUT
V PRO
V FEEDBACK
3.8Vpp
2.5Vpp
H
H
TDA8377N52
0.9Vpp
95Vpp
H
H
TDA8377IN33
10
12
Ch 2 output (+)
PIN
Function
6
Pump up power
7
Vertical output
8
Vertical protection
9
Vertical feedback
2.5Vpp
H
TDA8377IN51
5Vpp
H
TDA8377IN34
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