D-Ram Tests - Canon FAX L1000 Service Manual

3.4.3 D-RAM tests

Pressing the numeric key 1 from the test mode menu selects the D-RAM tests. 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. This test can be used to check operations when
optional memory has been added.
Operating
1:D-RAM 3456K
. . . . .
Normal end
1:D-RAM
complete (no error)
WRT : data written
RD : data read
ADR : address
Before D-RAM test, output all image data in image memory.
When D-RAM test is performed, all image data are cleared.
FAX-L1000 Chapter 2: Operating Instructions
3456K: D-RAM total memory capacity (bytes)
(7552 K: When 4 Mbyte Memory added)
(11648 K: When 8 Mbyte Memory added)
: Indicates an address for which write testing is complete.
. : Indicates an address for which read testing is complete.
Error
Error display
3456K WRT= 33CC RD= 33EC
ADR= BF840201
Error display
1:D-RAM
complete
Figure 2-46 D-RAM Test
2-69
Restart by pressing
Start key.
3456K
(error)