TM 5-3610-257-14
NOTE
Before removing CHANNEL control know, note position of knob pointer. Record color of filters
visible on filter holder tube. Failure to do so will result in incorrect alinement of the filters when
the new CHANNEL control switch is installed.
e.
Remove CHANNEL control switch knob.
f.
Remove nut securing CHANNEL control switch from chassis.
g.
Remove defective CHANNEL control switch.
h.
Tag and desolder wires from CHANNEL control switch.
NOTE
Before removing drive wheel from defective CHANNEL control switch, note position of the drive
wheel in relation to the shaft. The set screw locking the drive wheel must be on the flat side of the
shaft.
i.
Loosen setscrew and remove drive wheel from defective CHANNEL control switch.
j.
Install drive wheel on new CHANNEL control switch.
k.
Solder wires to new CHANNEL control switch and remove tags.
l.
Install new CHANNEL control switch to chassis with nut.
m.
Reconnect wires to switch and remove tags.
n.
Install switch knob.
o.
Install photomultiplier board (paragraph 4-20.20).
p.
Install light shield.
q.
Install chassis cover.
r.
Install densitometer (paragraph 4-20.1).
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