Canon imageCLASS MF5600 Series, Service Manual

Page: 238 / 256

Chapter 5
5-44
5.6.6.2
DRAM Test
5.6.6.2.1 D-RAM Test
0006-5855
D-RAM test menu is selected by pressing the numeric key 1 from the test mode menu. D-RAM Test 1 writes data to
the entire D-RAM region and reads it out to check that operations are correct. D-RAM Test 2 just reads data at high
speed.
F-5-11
Before D-RAM test, output all image data in image memory. When D-RAM test is performed, all image data
are cleared.
Error
Restart by pressing
Start button
DRAM TEST 40960KB
.......
DRAM TEST 40960KB
complete (no error) WRT=33CC RD=33EC
ADR=BF840201
DRAM TEST 40960KB
complete (error)
40960KB: D-RAM total memory capacity (bytes)
✽
: Indicates an address for which write testing is complete.
. : Indicates an address for which read testing is complete.
Operating
Normal end
(Normal end)
Error display
WRT : data written
RD : data read
ADR : address