D-Ram Tests - Canon FAXPHONE L75 Service Manual

LASER CLASS 1060P Chapter 4: Maintenance & Service

5.1.3 D-RAM tests

Pressing the 1 button 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.
Operating
1:D-RAM
✽ ✽ ✽ . . . . . ✽ ✽ ✽
Normal end
Complete (no err)
WRT : data written
RD : data read
ADR : address
7552K: D-RAM total memory capacity (bytes)
7552K
✽ : Indicates an address for which write testing is complete.
. : Indicates an address for which read testing is complete.
Error
Error display
WRT= 33CC RD= 3333
ADR= 2800
(Normal end)
Complete (no err)
Figure 4-24 D-RAM Test
4-58
Restart by pressing
START/COPY button.