Pontiac FIREBIRD 1972 Service Manual page 244

AUTOMATIC TEMPERATURE CONTROL 1B-57
PROGRAMMER AMPLIFIER REMOVE AND
REPLACE
Remove cover from programmer by removing five
screws and carefully lift away cover from program-
mer without bending fingers on finger block assem-
bly.
Remove finger block screws and move out of way
(Fig. 1B-62).
Unsolder nine leads where leads attach to amplifier,
Fig. 1B-62. Remove two circuit board mounting
screws. Lift board carefully straight up and off finger
block mounting post.
Install new board by reversing removal procedure
and secure with two mounting screws making certain
that ground lug 1s under the mounting screw nearest
wheel. Note that circuit board comes with a new
finger block and lead cable attached.
Solder previously disconnected leads. Use resin core
solder for all soldering operations.
Install finger block and rubber cable clamp. Make
certain that cable clamp is properly seated in its
bracket.
2. Remove finger block assembly and move out of way.
3. Remove retaining screw in hub of wheel and remove
potentiometer clip. Programmer wheel may now be
slipped off.
4. To replace reverse removal procedure.
GEAR INSPECTION
1. Remove programmer wheel as previously described.
2. Carefully remove wire clamps by placing a small
screwdriver under the higher of the two locking tabs
and gently work clips off mounting studs.
3. Remove two mounting screws on circuit board and
lift board off finger block mounting post and out of
way. Do not put undue strain on attached wiring.
4. Remove potentiometer bracket being careful of at-
tached leads. The gears and motor are located di-
rectly below the bracket.
5. Inspect gears, Fig. 1B-64, for broken teeth or other
abnormal conditions. Replace gears if broken or
inoperative.
Replace cover with five screws.
PROGRAMMER WHEEL
-
REMOVE
1. Scribe a thin line (using a screwdriver, knife or other
sharp instrument) on the potentiometer clip in line
with edge of wheel rib so that clip can be replaced in
same position on wheel, Fig. 1B-63. There is a white
paint mark in this area.
PROGRAMMER WHEEL
I
GEAR TRAIN
TO PROGRAMMER
WHEEL
,
,
PROGRAMMER
Fig. 18-63 Marking Programmer Wheel
Fig. 18-64 Programmer Gears and Motor