Daewoo NC-8913 Service Manual page 12

Trouble Shooting Guide
1
POWER&AMP Section
3
AC cord in
3
4
Power ON/OFF ON
5
6
LCD Display and back
light
7
8
Tuner/AUX/CD/USB Speaker
sound
9
Phones sound
Yes
no
Yes
no
Yes
no
Yes
no
1.Check F980，F981
2.Check PT903
3.Check RF982，RF983
4.Check CN902,CN701
5.Check IC900 of 3pin:9V ,
IC704 of 2pin:3.3V
6.IC701 of 22pin:3.3V
1.Check LC701
2.Check IC701
3.Check LD701 and LD702
1.Check IC800(TDA7292):Voltage of 3pin,
6pin and 1pin :more than DC(29.5,-29.5V).
2.Check IC801(TDA7292)/(CD7269ACZ):
Voltage of 3pin, 6pin and 1pin :more than DC
(29.5,-29.5V)/(18,-18V).
3.Check IC400(SC7314S):
Voltage of 1pin: normal DC(8.5V).
4.Check IC401/IC402(NJM4558M)
5.Check TUNER/AUX/CD input signal
6.Check output signal pin of IC800/IC801(
pin2,pin4).
7.Check CN800.
8.Check output signal terminals(J800).
1.Check J701
2.Check IC702(IL4560D)
3.Check CN700
1
3
3
4
5
6
7
8
9