Bose T5 Manual de serviço - Página 29
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Symptom
Mic Live Switch not
working on Port 2
(Dual Comm
versions)
Live Mic Button Not
Working
Talk-through (TT) Not
Working
(PTT) Button Not
Working Properly
Latched Mode of the
Push To Talk (PTT)
Button Not Working
Properly
Loud clicking/ticking
or thumping noise in
either or both ears.
Buzzing/humming
noises when touching
Electro-Luminescent
instrument panels.
Static heard through
headset
High frequency
squeal or oscillation
Troubleshooting
By design, the Mic live switch has no effect on any Port 2 device
under any configuration.
Button is located on the back of the control module. This button is
only enabled while operating from vehicle power. It is disabled when
operating from portable radios.
Check switch function with vehicle power to see if it is intermittent. If
so, replace control module.
Check all cables, earcups and control module for damage. Check
control module for bad TT rotary switch.
Replace microphone with a known good one. Retest. If okay.
Replace original microphone.
Connect a known good control module and down cable and connect
to a known good source and retest. If still not working, replace
earcups.
Check vehicle radio. Connect a known good headset to vehicle
connector. If okay, problem is with headset. Check connectors and
cables for damage.
Connect a known good control module to the earcup assembly.
Retest on vehicle radio. If okay, replace control module. If still bad,
problem is in the earcup assembly.
Latched mode of PTT – Intercom mic/line switch - Enabled only in
presence of vehicle of vehicle supplied power. Used inside vehicle
over intercom. Allows comms over a radio that is connected to the
intercom. PTT allows audio pass-through to radio.
Inspect the driver for any debris such as hair or sand.
Remove ear cushion. Check the driver membrane for dimples or
creases. If found, replace the earcup assembly.
If noise is continuous and increases when your hand is moved closer
to the instrument panel, then the headset is probably receiving
interference from the lighting. This is particularly true if when you
touch grounded metal the noise goes away.
These noises will not harm the headset; however, they may be
annoying and distracting for the user.
Connect to a known good source. If okay, problem is with the source.
Check cables and earcups for damage. Check earcup driver
membrane for debris or damage such as dimples or creases.
Connect known good control module and cable. If good, replace
control module. If still bad, replace earcups.
Inspect the driver for any debris such as hair or sand.
Remove ear cushion. Check the driver membrane for dimples or
creases. If found, replace the earcup assembly.
Check for missing or deteriorated ear cushions.
Verification/Solution
29