Bosch INT-TX04, Operation Manual, Page: 74 / 94

Problem Actions
Infrared receiver fails to function
properly: – If disposable batteries are used, check whether
the batteries have sufficient capacity and
whether they are inserted with the correct
polarity.
– If a battery pack is used, ensure that the battery
pack is fully charged.
– Ensure that the headphone is connected
properly.
– Switch the receiver on and check whether the
display indicates a channel.
– Ensure that the receiver picks up sufficient IR
signal and check whether the antenna symbol
becomes visible.
– Enable the mini radiator (menu 4M) and check
the receiver by holding it in front of the mini
radiator of the transmitter.
– Ensure that the volume control is turned up.
– Set the transmitter in test mode and check
whether the test tone is audible on the receiver.
– If the test tone is not audible, do the same test
with other receivers. If all receivers do not work
properly at that spot, check the coverage of the
system (see Test the coverage area, page 67).
The charging indicator LED on the
receiver is blinking: – Check that the charging unit is used under the
specified working conditions (see technical
data).
– Check that the receiver contains a battery pack
which is connected correctly.
– Ensure that the receiver is at room temperature
and re-insert the receiver in the charging unit.
– If the charging indicator starts blinking again,
replace the battery pack and check whether the
problem is resolved.
Receiver discharges very quickly: – Replace the battery pack and check whether the
problem is resolved.
Bad coverage: – Do the tests as described in Test the coverage
area, page 67.
74 en | Troubleshooting Language Distribution System
2013.11 | V1.4 | Operation manual Bosch Security Systems B.V.