Haier HTN20R15, Руководство по обслуживанию

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Pin No. 5: Control keys input (Max. Limit voltage)
AN7522/7523 Function : audio output
Symbol PIN Function Symbol PIN Function
Vcc 1 Power supply GND 7 ground
Out 1 (+) 2 Ch 1 output (+) In 2 8 Ch 2 input
GND(out 1) 3 Ch 1Ground VOL 9 Volume Control
Out 1 (-) 4 Ch 1 output (-) Out 2 (-) 10 Ch 2 output (-)
Standby 5 Mute input GND(out 2) 11 Ch 2 Ground
In 1 6 Ch 1 input Out 2 (+) 12 Ch 2 output (+)
Note: AN7523 is pin 1 to 9, AN7522 is pin 1 to 12.
TDA8357 Function : vertical output
Symbol PIN Function Symbol PIN Function
INPUT
1 、 2 INPUT VFB 6
VFB
VCC 3 VCC VO 8 VO
OUT
4 、 7 OUT VI 9
VI
GND 5 GND
3. Test point Waveforms
V4 0 1 C
5Vpp 0.9Vpp
1000Vpp
H
H
1Vpp
V
H
H
CRT KB
CRT KG CRT KR
95Vpp
95Vpp 95Vpp
H
H H
T 80 1 PIN 4
300Vpp 22Vpp
H H
V4 0 1 B
2.7Vpp
Function TV/AV MENU CH- CH+ VOL- VOL+
Voltage 0 0.4125 0.825 1.2375 1.65 2.0625
OM83
XX
2.5Vpp
2.5Vpp 3.8Vpp
H H
H
OM83
XX
OM83
XX
OM83 XX
OM83
XX
0.8Vpp
V
OM83 XX
OM8
3XX
OM83 XX
1.2Vpp
2.6Vpp
H
H
TDA93XX
TDA93XX
Circuit Explanation