Description; Board (Okifax4550); Memory Error - Oki OKIFAX4550 Maintenance Manual

4.

Description

4.1 46F Board (OKIFAX4550)

4.1.1 Memory error

1: Memory error
Error displayed on LCD
No
(See Note 1.)
Waveform of pin 14 (RAS)
of RAM 2, 3 are similar to
Figures H.1(3/4, 4/4)
Yes
Waveforms of pins 30, 31
(CAS) of RAM 2, 3 are similar
to Figures H.1(3/4, 4/4)
Yes
Waveform of pin 3 (WRN)
of RAM 2, 3 are similar to
Figures H.1(3/4, 4/4)
Yes
Replace RAM 2, 3.
41309401TH Rev.4
Note1: When RAM-NG appears on the test print
Yes
Waveforms of pins 11, 26 ,
28 of FLS are similar to
Figures H.1(1/4, 2/4)
No
No
No
Replace IC2.
Yes
11 : WR
No
26 : CE
28 : OE
Replace FLS.
535 /