Replacement Instruction - Honeywell UDC3500 Instruction

Replacement Instruction,

Printed wiring board
removal
Printed wiring board
identification
01/06
Continued
Table 2 How to Remove the Printed Wiring Boards from the Chassis
Step
Remove the chassis from the case as shown in Figure 1.
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2 Separate the chassis frame at the release points shown in Figure 2
and wiggle each printed wiring board out of its socket on the
display/keyboard assembly. Pull all boards out of the chassis.
Remove the wire connectors from plug WG1 on Power/Output
3
Board. Slide a small screwdriver under the connectors and lift the
release.
4 Lay the printed wiring boards flat on a static-free surface. Use
Figures 3 through 6 to locate the board being replaced.
Figure 2 Removing the Printed Wiring Boards
Release points (top and bottom)
Figure 3 Major Printed Wiring Board Identification
Power / Output Bd.
Optional Relays Bd.
Auxiliary output / Digital
Inputs / Communication Bd.
Kit Instruction 51-52-33-153
Action
WG1 and Wires
MCU / Input Board
Display / Keyboard
Continued on next page
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