Removal And Installation Of Glow Lamp And Photo Conductor Assemblies; Coomputer Assembly View - Piper Navajo Chieftain PA-31-350 Service Manual

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NAVAJO CHIEFTAIN SERVICE MANUAL
418
2
1. GAIN ADJUSTMENT
(PRESSURE)
2. GAIN ADJUSTMENT
(DRAIN)
3. TEST JACK
4. FUSE
5. CONNECTOR
PLI
6. CONNECTOR FL2
Figure 14-50. Computer Assembly
14-145 REMOVAL
ASSEMBLIES.
a Remove the
AND INSTALLATION
OF GLOW LAMP AND PHOTO CONDUCTOR
strobe sensor in accordance with paragraph 14-139.
NOTE
A reference mark should be placed along the edge of the sensor
unit to facilitate getting the proper alignment of part upon
reassembly.
b.
Remove the three alien capscrews holding the two halves of the strobe sensor together. It may be
necessary to tap the center shaft to separate the halves.
c. Reconnect plug PL3 and visually observe if both glow lamps light with the master engine turning at
near cruising RPM. A pulse generator simulator may be used according to paragraph 14-138 and Figure 14-56.
d. If either of the glow lamps is inoperative, the red colored block that holds the lamps must be
replaced. This is done by removing the three countersunk screws, one with an external nut. from inside the
strobe sensor case and removing the block assembly. Install the new one by using the removal method in
reverse.
e.
If the photo conductors are inoperative, the black colored block assembly may be replaced in the
same method as the glow lamps, step d, above.
f. Place the two halves of the strobe sensor together and align the previously made reference marks.
g. Secure the two halves of the unit together with the three allen capscrews.
h. Install the strobe sensor in the airplane and adjust it in accordance with paragraph 14-140.
Reissued: 9/23/80
4115
ACCESSORIES AND UTILITIES