Turn the chassis (4) bottom-side up and secure module (10)
to heatsink (12) with four screws (11).
Solder wires, as marked, to terminals of power supply mod-
ule (10) and remove tags.
Install top and bottom covers on chassis (4) in accordance
Overvoltage protection module U1 through U4 replacement.
Ensure that bottom of module is free of oil and dirt.
Spread a thin coat of silicone compound type DC340 (item
5, App. D) on the bottom of the module.
(b) Turn the chassis (4) upright and position the module (10A)
on the heatsink (12).
Turn the chassis bottom side up and secure the module to
the heatsink with two screws (11A).
Solder wires, as marked, to terminals of modules (10A) and
Install top and bottom covers on chassis in accordance
Intake filter replacement.
Secure the intake filter (16) to the fan spacer (15)
and cooling fan (14) using four screws (17), lock washers
(18), and flat washers (19).
Install RF contact strip, (item 6, App. D) to the filter
with pressure sensitive tape, type 467 (item 18, App. D).
Connect three wires as marked to the fan terminal block
and remove tags.
Secure the fan (14), fan spacer (15), and intake filter
(16) to the chassis (4) with eight screws (13).
Install top and bottom covers (2 and 3) in accordance with
Fan spacer replacement.
Secure fan (14) to fan spacer (15) in accordance with
Secure fan spacer to intake filter (16) and filter to
chassis (4) in accordance with paragraph 6-8b(9) , steps
(a) through (d).
Replace top and bottom covers (2 and 3) in accordance with
Cooling fan B1 replacement.
Install the fan (14) on the fan spacer (15) and turn
the rim clinch clamps (23) so that round side is toward
Tighten four screws (20), lock
the fan and securing fan.
washers (21) , flat washers (22), and rim clinch clamps
(23) to secure fan.
Install intake filter in chassis in accordance with para-