Oki OKIFAX 5750 Maintenance Manual page 820

3.7.2 ISDN Board NG (02)
2: ISDN Board NG (02)
Check FLS chip
solderling.
Check appearance of
G4A board.
Waveform of pins 12, 14,
43, 15 of FLS are similar to
Figure 3.7-1
Re-loading G4A program
by PC-loading.
Replace G4A board.
41285901TH Rev.3
Program hash NG at flash memory
in G4A board.
Bad
Good
Bad
Good
No
Yes
Good
Bad
Re-solderling
Modify bad point
Replace FLS and
re-loading G4A program
Flash memory failure
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