Subparagraph k, line 2. After "knob," add : on the PH-637/PFP and
the PH-637A/PFP
Last sentence. After the last sentence add: To remove the support
post clamping knob on the PH-637B/PFP, unscrew the knob
counterclockwise.
Subparagraph 1, heading. After `Crank", add: PH-637/PFP and
PH-637A/PFP
Add subparagraph m after subparagraph l:
m. Crank, PH-637B/PFP (fig. 32.1). To disassemble the crank, take
out the screw in the head of the crankshaft and pull the crank pivot out
of its mounting hole in the bracket. To disassemble the tension pivot,
unscrew the knob from the end of the tension pivot shaft, pull the pivot
nut of its mounting hole in the bracket, and remove the spring. To replace
the pivots reverse the disassembly instructions.
Figure 32, caption. Add the following after "disassembled": PH-
637/PFP and PH-637A/PFP.
Figure 32.1. Roil attachment disassembled, PH-637B/PFP. (Added)
Page 60, paragraph 56. Make the following changes:
Subparagraph a. Add the following after the last sentence: On the
PH-637B/PFP, the window is set in the frame but is not taped.
Subparagraph b(2), line 1. After "spring clips," add: (PH-637/PFP
and PH-637A/PFP) or clamp (PH-637B/PFP)
Subparagraph b(4), first sentence. At the beginning of the sentence,
add: On the PH-637/PFP and the PH-637A/PFP
Add subparagraph (4.1) after subparagraph (4) :
(4.1) On the PH-637B/PFP, unscrew the elevation knob and take
out the two screws that hold the mirror support at the top of the
projection head housing. Lift the support out of the housing.
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