Ram Ng - Oki OKIFAX4550 Maintenance Manual

4.4.9 RAM NG

9: RAM NG
Check RAM1 solderling.
Good
Check appearance of
G4N board.
Good
Waveform of pins 14, 31,
13, 2 of RAM1 are similar
to Figure H.12.
Yes
Replace G4N board.
41309401TH Rev.4
DRAM read/write test result is NG.
Bad
Re-solderling
Bad
Modify bad point
No
Replace RAM1
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