Daewoo NC-8112E Service Manual page 10

Trouble Shooting Guide
1
SMPS & AMP Section (Only NC-8112E Model)
2
AC cord in
3
Yes
4
Power ON/OFF ON
5
6
VFD Display
7
8
Yes
9
Tuner/AUX/CD/USB Speaker
sound
Yes
Phones sound
no
Yes
no
no
no
1.Check F901
2.Check PT901
3.Check CW902 of 6pin:3.3V
4.Check CW902 of 7pin:(main power on)
5.Check CN700
6.Check IC707(MCU IC)of 33pin/40pin:3.3V
7.Check IC707(MCU IC) of 32pin:(main power
on)
1.Check CW903
2.Check CN702
3.Check FD701(VFD)
4.Check IC701(SC16315)
1.Check CW901 of 1/2pin voltage:22V
2.Check CN801 of 1/2pin voltage:22V
3.Check IC800(TDA7492P): Voltage of 6/7pin
and 12/13pin :22V
4.Check IC800(TDA7492P):Voltage of 20pin and
21pin :3.3V
5.Check IC801(SA1117BH-3.3):Voltage of
2pin :3.3V
6.Check IC400(SC7314S):
Voltage of 1pin: normal DC(9V).
7.Check TUNER/AUX/CD input signal
8.Check output signal pin of IC800(TDA7492P)
2/3pin, 8/9pin and 10/11pin,16/17pin.
9.Check output signal terminals(J800).
1.Check J301
2.Check IC702(IL4560D)
3.Check CN700
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