Daewoo Rautz NC-8008EB, Service Manual, Page: 7 / 50

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