UPGRADE 2350A GC S/W AND 2350 EPROMS E-11
MON2000
JULY 2010 Disconnect Power and Disassemble
1. Disconnect AC power from the
GC Controller.
When you have access to the GC Controller
Terminal Board (TB) for field wiring
(accessed from the rear on rack-mount
versions and behind the front cover of
explosion-proof models) disconnect the AC
power cord from J21 before continuing
working on the unit.
2. For newer model 19-inch rack mount and
retrofit GC Controllers, proceed as follows:
(a) Remove the (right) side access panel that
is secured to the chassis with four
thumbscrews.
(b) Unplug all cables connected to the
boards in slots 2 through 6 of the Card
Cage Assembly in order to access the
SBC53 CPU Board.
(c) Proceed to Step 3 below.
For the explosion-proof GC Controller or
older rack mount GC Controllers, proceed as
follows:
(a) Access the GC Controller Terminal
Board for field wiring.
On the explosion-proof GC Controller,
remove outer housing bolts and lower
the cover on its bottom hinge. The TB
faces the front.
On rack mount GC Controllers, the TB is
exposed and faces the rear.
(b) Loosen the six thumbscrews that secure
the TB. Then gently unplug the TB from
its mating DIN connectors at the back,
top of the board.
(c) Lower the TB down (held in place by its
ground straps at the bottom of the board)
in order to expose the Card Cage
Assembly.