Self-Test - Canon LBP-860 Service Manual

E. Self-test
When the power is switched on, the printer
executes the self-diagnosis program for the
video controller to check the video
controller and control panel states. This
function is called the self-test. The self test
procedure is as follows:
1) Self-diagnose the CPU. Any errors
encountered during the test are
displayed on the Status indication
display as service calls.
2 ) A f t e r t h e C P U c o m p l e t e s a self-
diagnosis. the video controller will also
execute a self-diagnosis. Any errors
encountered here are also displayed on
the Stalus indication display (VFD] as
service calls.
VFD are displayed. The communi-
cation between the CPU and the IOP
are subsequenently checked.
RAM and expanded RAM SIMM) will
mainly be checked. and the time will be
displayed depending upon the memory
capacity of the expanded RAM. The
following checks arr made during this
-Check whether an optional RAM
SIMM is inslalled (checksum check if
it is installed)
. Internal RAM check
. IOP check
. SCSI controller check
. Optional RAM SIMM check
Engine check
turned off. This state lasts for about 3
seconds.
3) The READY indicator flashes until self-
diagnosis ends and the printer goes
into standby.
4) When the printer goes into standby,
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t h e R E A D Y i n d i c a t o r ,
indicator, and the paper pick-up mode
indicator light, and "00 READY AUTO"
appears on the Status indication
display. If any operator call or error
occurs. it is indicated by an indicator
and the Status indication display.
printer, the hard disk drive state is
checked during the self-test.
error is detected in the drive (for
example, the power was turned off
during access to the drive), it is
recovered automatically during the self-
test period (by the simple recovery
program). See Section V of Chapter 1
for details of the simple recovery
program.
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If an
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