Isdn Board Ng - Oki OKIFAX4550 Maintenance Manual

4.4.2 ISDN Board NG (02)

2: ISDN Board NG (02)
Check FLS chip
solderling.
Good
Check appearance of
G4N board.
Good
Waveform of pins 12, 14,
43, 15 of FLS are similar to
Figure H.9
Yes
Re-loading G4N program
by PC-loading.
Bad
Replace G4N board.
41309401TH Rev.4
Program hash NG at flash memory
in G4N board.
Bad
Re-solderling
Bad
Modify bad point
No
Replace FLS and
re-loading G4N program
Good
Flash memory failure
562 /