TM 11-5841-287-30
panel of encoder and remove outer cover (3).
wires con-nected to its eight terminals (five wires)
(4) Loosen four quarter-turn fasteners (6,
(6) Unsolder wires tagged in step (5) from
sheet 3) on left inner cover (7) Remove left inner cover to
power supply 2PS3 terminals and place carefully aside
gain access to power supply 2PS2
(7) Place encoder on right-hand side to
(5) Tag wires connected to the four
gain access to power supply 2PS3 mounting hardware
terminals (six wires) on power supply 2PS2
CAUTION
(6) Unsolder wires tagged in step (5) from
Hold power supply 2PS3 securely when
power supply 2PS2 terminals and place carefully aside
removing mounting hardware to prevent damage
(7) Place encoder on right-hand side to
to adjacent hardware and circuit cards
gain access to power supply 2PS2 mounting hardware.
(8) Remove four nuts (8) and eight
CAUTION
washers secur-ing power supply 2PS3 to bottom of
Hold power supply 2PS2 securely when
power supply mounting chassis.
removing mounting hardware to prevent damage
(9) Remove power supply from mounting
to adjacent hardware and circuit cards
surface of chassis by pulling straight out
b. Replacement Replace power supply 2PS3
(8) Remove four nuts (8) and eight
washers secur-ing power supply 2PS2 to bottom of
as fol-lows
power supply mounting chassis
(1) Repeat steps a(l) through (4) above as
(9) Remove power supply 2PS2 from
neces-sary.
chassis
(2) Apply a thin, even layer of silicone heat
b. Replacement Replace power supply 2PS2
sink compound (Dow Corning 340) to base of power
as fol-lows:
supply 2PS3 and to chassis mounting surface for power
(1) Repeat steps a(l) through (4) above as
sup-ply 2PS3.
neces-sary
(3) Position power supply 2PS3 on
(2) Apply a thin, even layer of silicone heat
mounting sur-face of chassis. Install and tighten four
sink compound (Dow Corning 340) to base of power
nuts (8, fig 3-4, sheet 3) and eight washers to secure
supply 2PS2 and to chassis mounting surface for power
power sup-ply
sup-ply 2PS2
(4) Place encoder in upright position
(3) Position power supply 2PS2 on
(5) Reconnect wires tagged previously to
mounting sur-face of chassis Install and tighten four nuts
(8, fig 3-4, sheet 3) and eight washers to secure power
sup-ply
(6) Replace left Inner cover (7) over power
(4) Place encoder in upright position
supply 2PS3. Secure cover by tightening four quarter-
(5) Connect wires to power supply 2PS2
turn fasteners (6).
(7) Replace outer cover (3, sheet 1) on
wlrng information). Remove tags
encoder Se-cure cover by replacing two screws (1) and
(6) Replace left inner cover (7) power
washers in top of cover (3) and tightening three quarter-
supply 2PS2 Secure cover by tlghtemng four quarter-turn
turn fasteners (2) on rear panel
fasteners (6)
3-15. Removal and Replacement of Connector
(7) Replace outer cover (3, sheet 1) on
encoder Secure cover by replacing two screws (1) and
a. Removal. Remove connector assembly
washers m top of cover (3) and tightening three quarter-
2A19 (fig 3-4, sheet 4) as follows.
turn fasteners (2) on rear panel
(1) Disconnect power to the encoder
3-14. Removal and Replacement of Power Supply
Place encod-er on flat surface and in the normal
operating position
a. Removal Remove power supply 2PS3 (fig
(2) Remove two screws (1, fig. 3-4, sheet
1) and washers from top of encoder outer cover (3).
(1) Disconnect power to the encoder
(3) Loosen three quarter-turn fasteners (2)
on rear panel of encoder and remove outer cover (3)
Place encod-er on a flat surface and in the normal
(4) Loosen four quarter-turn fasteners (4,
operating position
sheet 4) on right inner cover (5) Remove right inner
(2) Remove two screws (1, fig 3-4, sheet
cover to gain access to circuit cards and connector
1) and washers from top of encoder outer cover (3)
assembly 2A19
(3) Loosen three quarter-turn fasteners (2)
(5) Release circuit card 2A2 from locked
on rear panel of encoder and remove outer cover (3).
position by lifting up on card extractors
(4) Loosen four quarter-turn fasteners (6,
(6) Grasp circuit card 2A2 firmly and
sheet 3) on left inner cover (7). Remove left inner cover
remove by
to gain access to power supply 2PS3
(5) Locate power supply 2PS3 and tag
3-23
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