TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (continued).
MAINFRAME
SWITCH
EMERGENCYSTOP
SWITCH
CONTINUITY TEST
(1) Disconnect remote control cable from
remote control unit.
(2) Set multimeter to ohms position.
(3) Position EMERGENCY STOP switch
in the ON position.
(4) Have assistant hold the MAIN FRAME
switch in the UNLOAD position.
REMOTE CONTROL
NOTE
A reading of infinity indicates an open
REMOTE CONTROL
CONNECTOR (J9)
circuit.
(5) Connect multimeter leads to positions
"E" and" L" on remote control unit,
and check multimeter for continuity.
(6) Repeat Step 5, but this time check
for continuity between positions "L"
and "H".
REMOTE CONTROL
UNIT
4-273
Change 1
