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SIR 320 SIR Infrared System
22 Copyright by beyerdynamic
Trouble shooting
Fault Possible reason Action
No sound at headphone Headphone not connected Plug in headphone
No sound at headphone Receiver not switched-on Push one button at the
navigation dial with
headphone connected
No sound at headphone Display at the receiver not lighting
after switching on.
Batteries not inserted, empty or
weak.
Insert new batteries and carry
out a hardware reset
Receiver can not be
switched-on
Undefined working order
Carry out a hardware reset
After switching-on, the
back light is shining only,
no further keystroke is
possible
Undefined working order
Carry out a hardware reset
Receiver gets noise at the
headphone only
No IR - reception Switch on IR–transmitter
Receiver gets noise at the
headphone only
No IR - reception
Connect the radiators with
active IR-transmitter
Receiver gets noise at the
headphone only
No IR - reception
Change IR-channel to other
position
Receiver gets noise at the
headphone only
Selected IR-channel has no
transmission
Check IR-transmitter using
correct adjustment
Receiver gets noise at the
headphone only
Receiver is in Shift mode setting
(instead displaying „00“ (OR-ch)
you will see „or“
Deactivate the Shift mode
(See Service mode)
No sound at headphone Volume to low Adjust volume (VOL up)
No sound at headphone Wrong headphone used Use the correct headphone
(see accessories)
Receiver switched off after
approx. 15 sec.
No reception signal
Check whether the IR-
transmitter and the radiators
are switched-on
Receiver switched off after
approx. 15 sec.
Reception channel will not be
transferred from IR-transmitter
Change channel setting
(channel up or down)