Daewoo Rautz NC-8008EB Service Manual page 7

Trouble Shooting Guide
1
Initial Operation
2
START
3
Standby LED
ON?
4
5
6
Power on?
7
8
9
10
11
12
Display Clock on the
VFD?
13
VFD Driver Interface
14
is OK?
15
Initial Operation OK
No
Yes
Supply ST_3.3V?
No
1
Yes
PWR_ON(19p) of
IC501 is HIGH?
P_SAVE of IC501
(89p) is HIGH?
2
No
Check data line between IC501 and 701
Yes
No
Check VFD Data Interface (VFD_DATA/CLK)
Yes
No
Check Connection CW707
Yes
Check Power Supply
No
Yes
OSC waveform of
XC501 is OK?
No
Yes
Replace IC501
Replace Flash Memory and SDRAM
Replace Front PCB Ass'y
No
Yes
Replace XC701
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15