TM 5-3610-257-14
d.
Turn CHANNEL control knob until lockscrew is accessible and remove lockscrew.
e.
Slide filter holder tube to rear of unit.
f.
Carefully remove defective photomultiplier board assembly.
g.
Slide filter holder tube off photomultiplier tube.
h.
Remove and retain photomultiplier tube.
i.
Remove ribbon cable connector.
j.
Aline pins on ribbon cable with holes in socket on new photomultiplier board assembly.
k.
Apply even pressure to seat connector.
l.
Install photomultiplier tube.
m.
Slide filter holder tube on photomultiplier tube.
n.
Carefully install photomultiplier board assembly back into holder.
o.
Slide filter holder tube forward and install lockscrew.
p.
Install filter light shield.
q.
Install chassis cover.
r.
Install densitometer (paragraph 4-20.1).
4-56
