Daewoo EKE Service Manual page 15

Trouble Shooting Guide
1
Front Section
2
AC cord in
3
Yes
4
VFD display
5
Yes
6
CD initial
7
Yes
8
Function command
9
Yes
Tuner function
Yes
Function LED
Yes
1.Check CN701 of 7 pin: 4V.
2.Check IC701 of VCC 17 pin,72 pin,90 pin
voltage:3.3V.
3.Check -VPP voltage:-31.9(IC701 of 51pin).
no
4.Check between FIL1 and FIL2 AC
voltage:5.6V(FD701 of 1 pin and 33 pin).
5.Check XC701: 12MHZ.
1.Check CW703: 2pin,4pin,8pin,9pin,10pin,
no
11pin,12pin,13pin.
2.Check IC701: 5pin,7pin,71pin,81pin,94pin,
95pin,96pin,97pin.
1.Check IC701: 24pin,25pin,26pin.
no
2.Check IC701: 85pin,87pin.
1.Check CW702:16pin,17pin, 18pin,19pin,20pin.
2.Check CW702:13pin,14pin(only RDS).
no
3.Check IC704 VCC 14pin voltage: 3.3V.
4.Check IC704: 1pin,4pin,10pin,11pin.
5.Check IC701:3pin,64pin,66pin,85pin,86pin.
6.Check IC701: 27pin,65pin(only RDS）
1.Check HQ723,HQ724
2.Check LD703,LD704,LD705,LD706,LD713,
no
LD714,LD715,LD716,LD717,LD718,LD719,
LD720.
3.Check HQ711,HQ712,HQ713,HQ714,HQ715,
HQ716.
4. Check IC701: 73pin,74pin,75pin,76pin,77pin,
78pin.
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2
3
4
5
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7
8
9