C. Prepare for the Test
S 865-029
(1)
Remove electrical power (Ref 24-22-00).
S 865-030
(2)
Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
NOTE:____Some circuit breakers can be in one of two locations. These circuit breakers are shown with two locations.
(a)
6L13 or 6L15, PITOT HEAT CAPT MAIN
(b)
6L14 or 6L16, PITOT HEAT L AUX
(c)
6L17, L AOA HEAT
(d)
6L21, PITOT HEAT R AUX
(e)
6L22, PITOT HEAT F/O MAIN
(f)
6L23, R AOA HEAT
(g)
6L24, TAT PROBE HEAT
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757 MAINTENANCE MANUAL
D. Procedure - Window Heater Element Loop Resistances Test (Fig. 501)
S 035-031
CAUTION: MAKE SURE THE WINDOW HEAT TERMINAL BLOCKS ARE HELD IN POSITION
_______ WHEN YOU CONNECT OR DISCONNECT THE ELECTRIAL CONNECTORS. THIS PREVENTS DAMAGE TO THE TERMINALS ON THE WINDOWS.
(1) Disconnect the applicable electrical connectors for the flight compartment window.
NOTE: It is not necessary to remove protective covers from the
____ window heat electrical connectors when you remove the electrical connectors.
S 765-032
(2) Make sure the resistances for the window heating element loop are as shown in Table 501.
(a) For No. 1 window, measure the resistances for the window heating element loop between power terminals J1 to J5 or J4 to J5 (Fig. 501).
S 435-033
CAUTION: MAKE SURE THE WINDOW HEAT TERMINAL BLOCKS ARE HELD IN POSITION
_______ WHEN YOU CONNECT OR DISCONNECT THE ELECTRICAL CONNECTORS. THIS PREVENTS DAMAGE TO THE TERMINALS ON THE WINDOWS.
(3) Connect the electrical connectors to the window terminals.
S 435-034
WARNING: INSTALL PROTECTIVE COVERS ON ALL WINDOW TERMINAL ELECTRICAL
_______ CONNECTORS. EXPOSED WINDOW HEAT ELECTRICAL CONNECTORS ARE AT HIGH VOLTAGE POTENTIALS AND CAN CAUSE INJURY TO PERSONS.
(4)
Make sure you install the protective covers on all window terminal electrical connectors.
S 865-035
(5)
Remove the DO-NOT-CLOSE tags and close these P6 panel circuit breakers:
NOTE:____Some circuit breakers can be in one of two locations. These circuit breakers are shown with two locations.
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