Canon AS-100C, Field Service Manual

Page: 66 / 136

4.3.2. Optional interface
The installation location varies with each option interface as
shown in Fig. 1.1.1.
(1) Serial data interface
For serial data interface, two types are available, one
to be connected to 1/0—MOTHER—E P.C.B., and the other to
CPU+I/0-C0NT P.C.B.
i) RS232C P.C.B.
However, be careful because the 25P mounting plate of
RS232C P.C.B. is different according to the location.
(The rear side of each 25P mounting plate has an A mark.)
No. 2 and 3 marked
on rear panel
Make sure whether or not 25P mount­
ing plate A (alphanumeric mark:
EA4-0079) is fitted to RS232C P.C.B.
No. 4 marked on Exchange 25P mounting plate A to B
rear panel
( D Remove both rear and upper covers. See paragraph 3.1
of Chapter 3.
(5) Pull out power supply unit half its depth (paragraph
5.2.2), and remove power supply unit reingorcement
mount with four retaining screws as in Fig. 4.3.3.
4-22