Canon SmartBase MPC400, Service Manual

Page: 144 / 179

4-60
SmartBase MPC600F/MPC400 Chapter 4: Maintenance & Service
1:D-RAM 4528K
Complete (no err)
4528K: 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
WRT= 33CC RD= 3333
Error
Error display
Restart by pressing
Start key.
Error display
WRT : data written
RD :
data read
ADR : address
✽ ✽ ✽
. . . . .
✽ ✽ ✽
ADR= 2800
Complete (err)
6.2.4 CS tests
Pressing the
2
button from the test mode menu selects the CS tests.
ADJ LED TIME
is used to adjust the
CS LED lights-on duration and enter the contact sensor’s shading data (pre-scan operation).
Details on CS LED lights-on duration adjustment, see
3.1 CS LED Lights-on Duration
Adjustment on page 4-6
.
Tests [2], [3], [4] and Tests [5] are not used in the field.
Figure 4-25 D-RAM Test
6.2.3 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.
Replace the SCNT board if an error occur.