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5-7SectionTroubleshooting Flowcharts
78
• Are the lengths of the main line and the branch lines, and the total length, all
within the prescribed limits?
• Are flat cables and VCTF cables mixed together among the transmission
lines?
Power Supply Check
Power indicator not lit.
Replace the Power
Supply Unit.
Is power being
supplied?
Is voltage adequate?
Are there any loose
terminal screws or bro-
ken wires?
Connect power
supply.
Is PWR indicator lit?
Set supply voltage with-
in acceptable limits.
Is PWR indicator lit?
Tighten screws or
replace wires.
End
Yes
No
No
Yes
Yes
No
No
No
Is PWR indicator lit?
Yes
No
Yes
Yes