Pag. 22
SM42A / SM82A 2802
7 Troubleshooting
PROBLEM
PROBABLE CAUSE
REMEDY
Power LED is off
•
Power supply absent
•
Make sure the jack from the power supply is properly
inserted in its socket. Make sure the power supply is
properly inserted in the main outlet socket.
Remote keyboard
commands are not
carried out
•
Protocol configuration error
•
Configuration error in baud
rate for communication with
keyboards
•
Wiring
error
•
Make sure the matrix has the same communication
protocol as the keyboard (see configuration dip switches
in section 3.4.2.2).
•
Make sure the communication rate is the same as the
setting for the keyboards (see configuration dip
switches).
•
Make sure the cables are intact and follow the wiring
diagrams (see the chapter on installation). Do not
exceed the maximum allowed distances: 1200 m for
non-remote powered keyboards (RS485 lines A and B)
and 700 m for remote powered keyboards (12VDC Lines
and GND).
Output video 2
does not switch
•
VCR trigger setting
•
Output 2 has been set for control by VCR trigger. If it is
to be controlled by the keyboard go to the ‘External
triggers’ item and set Use VCR: No.
The keyboard is
unable to switch
some of the matrix
outputs
•
The keyboard has been
enabled to manage some of
the monitors
•
Some keyboard models (DCJ, DCK e DCT), allow the
control of some output videos to be disabled. See the
specific keyboard manual and check the settings for the
output videos that can be controlled by the keyboard.
The Aux line does
not work
•
Aux
Line
disabled
•
Keyboard and matrix
protocol configuration error
•
Wiring
error
•
In the menu for the Aux line, make sure protocol and
baud rate settings for the line are the same as those for
the receiver/mux to be controlled
•
The matrix and hence all the keyboards should have the
MACRO protocol setting and the same baud rate
•
Check the wiring for the Aux line with that shown in the
chapter on installation.
Telemetry via
coaxial cable does
not work
•
Telemetry via coaxial
disabled
•
Keyboard and matrix
protocol configuration error
•
Error in receiver address
setting
•
Wiring
error
•
Check the menu for enabling Coax Telemetry
Transmission via coaxial cable.
•
The matrix and keyboards should have the MACRO
protocol setting with the same baud rate
•
The receiver address should be the same as that of the
input video to which it is connected by coaxial cable (e.g.
input video 4 / receiver with address 4)
•
Make sure the coaxial cable is intact. Do not insert video
distributor, amplifiers or equalisers between the
telemetry receiver and matrix input. Do not exceed the
maximum allowed distance for telemetry transmission
via coaxial cable (350 m)
The matrix shows
completely black
screens, without
identification text
•
Error in switching cycle
setting
•
Manual switching on input
video not present
•
Use the menu to make sure the switching sequences
have been set up with the input videos present.
•
If manual switching is carried out on an input video that
is not present, a completely black screen without
identification text will be shown.
The automatic
switching
sequence does not
correspond to the
preset sequence.
•
Error in switching sequence
setting
•
Check the switching sequence setting in the switching
sequence menu.
