Canon MultiPASS C530, Service Manual

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MultiPASS C530/C560 Chapter 1: General Description
5.5.5 Lightning protection
The fax unit’s electrical components are protected from abnormal voltage caused by lightning.
Protected Component Safety Device
SPCNT/NCU board assembly Arrestors (AR1, AR2) on the primary side of the NCU board discharges
a voltage over 320 to 480 VDC via the power cord
When protection is not possible
The SPCNT board may not be adequately protected even with the protection circuits if
lightning strikes the telephone line.
5.5.6 Power leakage protection
The AC line, telephone line, and metal parts of the fax unit are completely insulated. The fax unit has a
grounded power cord (three-prong plug) to prevent electrical shock. If power leakage does occur, use the
fax unit only with a grounded electrical outlet supplying the proper voltage.
NOTE