Test Point Waveforms - Akai 21CTU94BC Service Manual

LA9302A/8177/LA78041/LA78040
Symbol
INV IN
VCC1
PUMP UP
G N D

Test point Waveforms

2.6Vpp
H
TDA11105 PIN1
95Vpp
H
CRT KR
1Vpp
V
TDA11105 PIN14 TDA11105 PIN15
22Vpp
H
HEATER
TDA8177 / ST9302/ LA78040 or LA78041
PIN 1 2
V 0.7 15
Function : vertical output
PIN Function
1 Input
2 Power
3 Pump up power
4 G o r u n d
1.2Vpp
H
TDA11105 PIN45
TDA11105 PIN52
95Vpp
H
CRT KG
0.8Vpp
V
TDA11105 PIN24
300Vpp
H
T511 PIN7
3 4 5
-12 -15 0.3
Symbol
V OUT
VCC2
NON INV IN
3.8Vpp
H
TDA11105 PIN44
95Vpp
H
TDA11105 PIN56
CRT KB
1.3Vpp
2.7Vpp
V451 B
6 7
15.9 -0.07
22
PIN Function
5 Vertical output
6 Output power supply
7 Negative feedback
2.5Vpp
2.5Vpp
H H
TDA11105 PIN46
0.9Vpp 5Vpp
H
H
TDA11105 PIN57
1000Vpp
H
H
V451 C