R46 Board (Okioffice87); Memory Error - Oki OKIFAX4550 Maintenance Manual

4.2

R46 Board (OKIOFFICE87)

4.2.1 Memory error

1: Memory error
Error displayed on LCD
No
(See Note 1.)
Waveform of pin 14 (RAS)
of RAM 1 are similar to
Figures H.1(3/4, 4/4)
Yes
Waveforms of pins 37, 38
(CAS) of RAM 1 are similar
to Figures H.1(3/4, 4/4)
Yes
Waveform of pin 13
(WRN) of RAM 1 are similar
to Figures H.1(3/4, 4/4)
Yes
Replace RAM 1.
41309401TH Rev.4
Note1: When RAM-NG appears on the test print
Yes
Waveforms of pins 11, 26 ,
28 of FLS1 are similar to
Figures H.1(1/4, 2/4)
No
No
No
Replace CPU1.
Yes
11 : WR
No
26 : CE
28 : OE
Replace FLS1.
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