1. Ensure power supply input voltage is 14-volts.
2. Check for malfunction in interconnecting cables.
a. Ensure pins 1 and 3 of interconnecting cable are not reversed.
b. With an ohmmeter, checlc continuity between pins l and 3 of interconnecting cable. If a reading is
obtained on the meter, cable is shorted and must be replaced.
—CAUTION—
When disconnecting the power supply, allow 5 minutes of bleed
down time prior to handling the unit.
—NOTE—
A short as described in steps a and b will not cause permanent
damage to the power supply, but the system will be inoperative.
Avoid any connection between pins 1 and 3 of the interconnecting
cable as this will discharge the condenser in the power supply
and destroy the trigger circuits. .
3. Check interconnecting cables for shorts.
a. Disconnect output cables from power supply outlets.
b. Check for continuity between connectors of each interconnecting cable by checking from pin l to
pin l, pin 2 to pin 2, and pin 3 to pin 3. When making these checks, if no continuity exists, cable is
broken and must be replaced.
c. Check continuity between pins 1 and 2, 1 and 3, 2 and 3 of interconnecting cables. If continuity
exists between any of these connections, cable is shorted and must be replaced.
4. Check tube socket assembly for shorts.
a. Disconnect tube socket assembly of anti-collision light from interconnecting cable.
b. Check for continuity between pin 1 of AMP connector to pin 1 of tube socket. Pin 2 of AMP
connector to pins 6 and 7 of tube socket and pin 3 of AMP connector to pin 4 of tube socket.
When making these tests, if no continuity exists, tube socket assembly is broken and must be
replaced.
—END—
33 - 44 - 00
Page 33 - 09
Reissued: August 1, 1986
2D6
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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