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Canon B820 - Page 44

Canon B820
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3.4.5 DRAM test
In the test mode menu, press numeric button ‘1’ and select the DRAM test mode. DRAM test 1
writes and reads data into and from all areas of the DRAM and checks that the operation is normal.
DRAM test 2 performs data read only, at high speed.
In the event of an error, replace the SCNT board.
DRAM TEST
0C30000
DRAM COMPLTE
0C30000: sector being checked
Testing
N
ormal completion
W= 33CC R= 3333
Error
Error display
Press the START/ COPY
button to restart
Error display
W: Write data
R: Read data
ADR: Address
:
ADR
ADR= 2800
DRAM (error)
Figure 1-12 DRAM test
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