Spare Parts List - Honeywell TA3840 Maintenance Manual

Communication board - Removing/installing
●
Disconnect the connector from the front panel (A).
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Disconnect the two 10-pins connectors (B) from the LCD display board and the backlight 2-
pins connector (C).
●
Disconnect the power supply 24 Vdc and communication port (Terminal 4 wires, D).
●
Remove the 4 nuts and washers fixing the communication board using a 5.5 mm spanner.
●
Install the new communication board and reconnect in reverse order (refer to "CONNECTION"
chapter of the MI5008E installation manual).
LCD display board - Removing/installing
●
Disconnect the two 10-pins connectors from the communication board (E).
●
Disconnect the 2-pins connector (F), unsolder the two wires, and solder them on the new
electronic board, taking care with their color: orange (+) towards top, black (-) towards bottom
and 10-pins connectors.
●
Remove the 4 nuts and washers fixing the LCD display board using a 5.5 mm spanner.
●
Install the new LCD display board and reconnect in reverse order.
Front face replacement
●
Disconnect the green ribbon cable connector (A) from the Communication board.
●
Disconnect the two 10-pins connectors (B) from the Communication board.
●
Disconnect the 2-pins connectors (C)
●
Remove the communication board and the LCD board using a 5.5 mm spanner.
●
Install in reverse order the boards on the new front panel and reconnect in reverse order.

5. SPARE PARTS LIST

TA3840C
Communication unit components, with ordering codes:
Doc No: MM5008E – Revision 6 – ENG
Code
34765 Fuse for power supply and communication board
34278 EMC filter
34262 Power supply and communication board
34263 CPU board
35237 4-20 mA analog inputs board
35233 Multifunction board
34291 Interconnection board
25720 + 27209 LCD display board
26994 Front face
Designation
Data Processing Racks
TA3840 Maintenance Manual 24