Safer PR90 - Fault Classification; Power On Faults

Globalis International
PR9 SERVICE MANUAL
-
VER1.1
Page
88
of
112
to recognize and identify the machine malfunction to be corrected.
－ At times a malfunction is generated by more than one cause: it is
important in such cases to isolate the faults and deal with them one at a
time.
4.1.4. FINDING THE CAUSE
Using experience together with the information given in this section as a
guide, take a logical path to find the fault, starting from the most probable
cause through, to the most possibility until malfunction part is found.
4.1.5. SOLVING THE PROBLEM
Repair the machine so that it correctly resumes to operating as normal.
4.2. FAULT CLASSIFICATION
To make the search easier, the faults have been classified as follows:
－ 4.3 Power-on faults
－ 4.4 Document printout faults
－ 4.5 Document handling faults
Each fault classification lists the more probable failures and their possible
causes.
The classification provided in this chapter cannot cover all the faults that
could occur on the machine: if the fault detected is not described herein,
refer to the description of a similar fault.
4.3. POWER ON FAULTS
FAILURE
POSSIBLE
CAUSE
The
printer
does not
power on
diagnostics
indicate a main
board failure
diagnostics
indicate a
mechanical
failure
The printer
is unable
to connect
with the
host
Incorrect power
supply unit
X
Damaged power
cord
X
Power cord
partly inserted
X
Faulty power
supply unit
X
Faulty main
board
X X