TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
KNOWN INFO
11.
TEST OPTIONS
Continuity Test.
Remote controls OK.
Are 2228 volts mea-
Function switch OK.
sured at the LHS MODE
SELECT switch (yellow
REASON FOR QUESTION
POSSIBLE PROBLEMS
wire)?
The MODE SELECT
MODE SELECT switch
switch determines the
faulty.
mode of operation for the
LHS. An open circuit
within the MODE SELECT
switch will prevent main
frame load operation.
Replace cab control
box (para 4-71).
NO
Fault not corrected.
YES
Notify supervisor.
Change 1
4-258
