Test Point Waveforms - Haier HTN20R15 Service Manual

Pin No. 5: Control keys input (Max. Limit voltage)
Function TV/AV
Voltage
AN7522/7523
Symbol PIN
Vcc 1
Out 1 (+) 2
GND(out 1) 3
Out 1 (-) 4
Standby 5
In 1 6
Note: AN7523 is pin 1 to 9, AN7522 is pin 1 to 12.
TDA8357 Function : vertical output
Symbol PIN
INPUT 1、2
VCC 3
OUT
4、7
GND 5

3. Test point Waveforms

2.6Vpp
H
95Vpp
TDA93XX
TDA93XX
H
CRT KR
1Vpp
V
OM83XX
OM83XX
22Vpp
H
MENU CH-
0 0.4125 0.825
Function : audio output
Function
Power supply
Ch 1 output (+)
Ch 1Ground
Ch 1 output (-)
Mute input
Ch 1 input
Function
INPUT
VCC
OUT
GND
3.8Vpp
1.2Vpp
H
OM83XX
H
95Vpp
95Vpp
H H
CRT KG
CRT KB
0.8Vpp
V
OM83XX
300Vpp
H
T801 PIN4
CH+ VOL-
1.2375 1.65
Symbol PIN
GND 7
In 2 8
VOL 9
Out 2 (-) 10
GND(out 2) 11
Out 2 (+) 12
Symbol PIN
VFB 6
VO 8
VI 9
2.5Vpp
H
OM83XX
0.9Vpp
H
OM83XX
2.7Vpp
H
V401 B
Circuit Explanation
VOL+
2.0625
Function
ground
Ch 2 input
Volume Control
Ch 2 output (-)
Ch 2 Ground
Ch 2 output (+)
Function
VFB
VO
VI
2.5Vpp
H
OM83XX
5Vpp
H
OM83XX
1000Vpp
H
V401 C