Differences in Models

TM 11-2323

Page 26, paragraph 12, chart (page 6 of C2). Delete the chart

and substitute:

Control

Location

Function

Right side of projector

Locks support post in posi-

Clamping knob _ _ _ _ _ _ _ _

tion.

housing, rear of sup-

port post (PH-637/

PFP, PH-637A/PFP,

and PH-637B/PFP)

(fig. 27). Rear of

yoke plate (PH-637C/

PFP) (fig. 7.1).

Racks projection head up

Focusing knob _ _ _ _ _ _ _

On split tube at end of

or down for focusing

projection head-sup-

purposes.

port arm (PH-637/

PFP, PH-637A/PFP,

and PH-637B/PFP)

(fig. 2). On head-

support arm flange

(PH-637C/PFP) (fig.

2.2).

Varies vertical angle of

Mirror elevation knob

On back of projection

front surface mirror;

(fig. 2 and 2.2).

head.

moves image up or

down on screen.

Turns projector power on

On front of housing_ _ _ _ _

On-off switch (fig. 2 and

or off; controls lamp

2.2).

and blower.

Winds used cellophane or

Takeup roll winding de-

On rear of housing (PH-

plastic on takeup roll.

637A/PFP and PH-

vice (fig. 1, 2, and 2.2)

637C/PFP); on left

side of housing (PH-

637/PFP and PH-637

B/PFP).

Rewinds cellophane or

On front of housing (PH-

Supply roll winding de

plastic back on supply

637A/PFP and PH-

vice (fig. 2 and 2.2)

roll.

637C/PFP; on right

side of housing (PH-

6 3 7 / P F P a n d PH-

637B/PFP).

Page 19, paragraph 16a ( p a g e 6 o f C 2 ) . M a k e t h e f o l l o w i n g

changes: Line 2. After "PH-637A/PFP", add: and the PH-

637C/PFP.

Add subparagraph (3) after subparagraph (2):

(3) PH-637C/PFP. Raise the front shelf (fig. 2.2) and make

sure that the projection stage is all the way down. Hold the