User's Manual

Repair
Servicing the
Control Box
Replacing the Isolation Board
NOTICE
To avoid damaging the circuit boards when
servicing the control box, wear Part No. 112190
grounding strap on your wrist and ground
appropriately.
To avoid electrical component damage, remove all
system power before plugging any connectors.
1. Follow the steps in Before Servicing, page 36.
2. Loosen the screws (124) and remove the
enclosure cover (117).
3. Note the position of the isolation board
cables. See the following table and
Electrical Schematics, page 29. Disconnect the
cables from the isolation board (111). Remove
the brackets (110).
Isolation Board
Connector
Cable De
stination
J1 (non-intrinsically
safe)
EFCM
J2 (non
-intrinsically
safe)
Option
al Color
Chang
e Module
J3 (intrinsically safe)
Barrier Board
J4 (intrinsically safe) Booth Control
4. Remo
ve the screws (128) holding the isolation
boar
d (111) to the barrier cover (107). Remove
the i
solation board.
5. Ins
tall the new isolation board, using the screws
(12
8).
6. Ins
tall the brackets (110). Reconnect the cables
to t
he positions as noted above.
7. Tu
rn on power at the main circuit breaker.
8. Tu
rn on the control box power switch. Check
th
at the two green LEDs (D7, D8) and two yellow
LE
Ds (D6, D14) are on.
9
.
R
einstall the cover (117) and tighten the screws
(
124).
Figure 26 Replacing the Isolation Board
Fi
gure 27 Detail of Isolation Board Cable
Co
nnections
3A2800B 39