6.1 CPUUNIT (Cent’d)
Component Name Function
.—
Memoryboard JANCD-IIM20. Data controller ROM,RAti
. Serro controller ROM
. PC ladder ROM
1/0 board JANCD-1020 . Input
112 points
“ output
64 points
(polarized and contactless type)
I
—
6.1! OPERATOR’S PANEL
Component Name
Panel Interface Board
(4JANCD-SP-20)
CRTUnit (TR-9DDYB)
Keyboard Unit
Function
‘ 9“ CRTinterface unit
“ Keyboard interface unit
“ Single-axis handle PG interface unit
. 1/0 unit for the panel
(input: 64 points
output: 32 points)
9“ CRTmonochrome (yel low)
. Function key and LED
. Address key
“ Data key
. Buzzer
Cautions for Replacement
“ Whenchanging ROMsfrom
the old PCB to new PCB,
be sure the ROMsa:re
plugged securely i:nto IC
socket before mounting
new PCB.
“ Mount after ensuring
that I/Oareano.(SWl)
is correctly set.
Cautions for Replacement
● Adjust brightness of CRT
as required after com-
pleting replacement.
(BRT: VR, CONTRAST’:VR)
“ Ensure that ENABLE/DIS-
ABLE
(SW1)and 1/0 area No.
(SW2)of single-axis
handle PG are correctly
set.
.
Makereplacement c)nly
after turning OFF the
main power supply;
CRThas high voltage
generating section.
–54–
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