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Owner’s manual
TB741P/TB742P/TB743W 17
8. TROUBLESHOOTING
■ If you think that something has gone wrong with your unit, check out the following points
before requesting servicing.
GENERAL
Problem Cause Measure
Power does not
turn on.
(No sound is
produced.)
Nothing happens
when buttons are
pressed.
Display is not
accurate.
The remote
controller does
not work.
Fuse is blown.
Incorrect wiring.
The microprocessor has
malfunctioned due to noise,
etc.
Direct rays of the sun fall on
the light-receptive part of the
remote controller.
The batteries of the remote
controller unit are dead or
there is no battery in the
remote controller unit.
Replace with a fuse of the same amperage. If the
fuse blows again, consult your store of purchase.
Consult your store of purchase.
Turn off the power, then press the reset button for
about 2 seconds with a thin rod.
Note: When the reset button is pressed, turn off the
ACC power.
∗ When the reset button is pressed, frequencies of
TV, etc. stored in memory are cleared.
When direct rays of the sun fall on the light-receptive
part of the remote controller, it may not work.
Check the batteries of the remote controller unit.
The Reset button