Canon LASER CLASS 730i Service Manual page 155

LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
6.3 D-RAM Tests
D-RAM test menu is selected by pressing the numeric button 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. This test can be used to check
operations when optional memory has been added.
Operating
1: D-RAM
. . . .
Normal end
1: D-RAM
complete
Before D-RAM test, output all image data in image memory. When D-RAM
test is performed, all image data are cleared.
13312K: D-RAM total memory capacity (bytes)
(46080K: When 32 Mbyte memory added)
13312K
: Indicates an address for which write testing is complete.
. : Indicates an address for which read testing is complete.
Error
Error display
13312K WRT=33CC
(no error) ADR=BF840201
Error display
1: D-RAM
complete
Figure 4-26 D-RAM Test
4-72
WRT: data written
RD=33EC
RD: data read
ADR: address
Restart by pressing
Start button
13312K
(error)