Troubleshooting
2021-07-07
77
Diagnosis
Possible Reason
Measure
CPU Unit:
LED
1
red
No audio connection to
CPU / audio source
Connect digital audio source.
Check connection of audio cable.
No signal
Switch digital audio source on.
Activate digital output at CPU /
audio source.
CON Unit:
LED
1
red
No audio connection to
audio sink
(e.g. speakers)
Connect digital audio sink.
Check connection of audio cable.
No signal
Check signal at CPU Unit.
No signal /
LEDs
1
OK
Digital Silence at active
audio source
Check LEDs at CPU Unit.
Check audio format.
Change audio input.
Pos: 116 /806- IHSE/Hilfe im Problemfall/Störung am U SB-HID-Modul- Anschl uss/474-xx @ 6\m od_1304586906004_6.doc @ 51475 @ 2 @ 1
8.7 Upgrade Module USB-HID
CPU Module
CON Module
Rear View
Rear View
Diagnosis
Possible Reason
Measure
LED
1
/
2
off
Device at higher / lower
USB-HID port not
detected
Check connection of USB cable
to USB-HID device.
Connect USB-HID device.
Contact dealer if necessary.
CPU Unit:
LED
3
off
Connection between
CON Unit and CPU Unit
Check interconnect cable and
connectors.
CON Unit:
LED
3
off
Keyboard in Command
Mode
Press <Esc> to leave Command
Mode.
CON Unit:
LED
3
flashing
slowly
Connection between
CON Unit and CPU Unit
Check interconnect cable and
connections.
Keyboard in Command
Mode
Press <Esc> to leave Command
Mode.
Pos: 117 /806- IHSE/Hilfe im Problemfall/Störung am U SB-2.0-Em bedded-Anschluss/474-xx @ 7\m od_1331802913522_6.doc @ 58211 @ 2 @ 1