Oki OKIOFFICE84 Maintenance Manual page 457

1: Memory error
Error displayed on LCD
No
(See Note 1.)
Waveform of pin 14 (RAS)
of RAM 2, 3 are similar to
Figures 1-3, 4
Yes
Waveforms of pins 30, 31
(CAS) of RAM 2, 3 are
similar to Figures 1-3, 4
Yes
Waveform of pin 3 (WRN)
of RAM 2, 3 are similar to
Figures 1-3, 4
Yes
Replace RAM 2, 3.
40672201TH Rev. 4
Note 1: When RAM-NG appears on the test print
Yes
Waveforms of pins 11, 26 ,
28 of FLS are similar to
No
No
No
Yes
Figures 1-1, 2
11 : WR
No
26 : CE
28 : OE
Replace IC2.
H - 2
Replace FLS.