Videotec SM82A - Manual (Page 67)

Page 29 MNVCSM42A_0408
7 Troublesh ooting
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.