Contemporary Research ICC1-232 RS-232 - Manual (Page 9)

Contemporary Research 9 ICC1-232 Manual
NEC
–AVT TVS
TV responds erratically to RS-232 commands, especially channel tuning.
Note that older sets with AVT tuners may need a firmware update to perform consistently. If the set
responds erratically to commands, often for channel commands, check with NEC support for firmware
information. Also, we have two commands sets for NEC AVT sets. The standard protocol works with all current
models of displays, the alternative code set works with older AVT models where we send emulated IR channel
commands instead of modern direct-access channel commands
Sharp RS-232 Control
While the Sharp RS-232 protocol generally works well, there are several known issues with how the sets
perform.
Sets will turn off from an RS-232 OFF command, but won’t turn on
Sharp sets are shipped in an Energy Star mode that turns off the RS-232 port when the TV is off – so it’s not
listening when you send an ON commands. We have a fix for this built into our Sharp control command for ON –
use this sequence to fix the issue:
 Send an OFF command through the Display Express system, using our software, our IC Send app, or
your control system
 Manually turn the Sharp TV(s) on
 Send an ON command through the DX system. Along with the ON command, we send a command that
enables full-time RS-232 operation
TVs refuse to activate the RS-232 from the standard ON command
Sharp tech support warns that there may be sets that don’t respond to the command that we (as well as AMX
and Crestron) send to enable the port. In this case, you will need the SERVICE manual for that specific model
and serial #. That will include the hidden menus you will need to access to fix the problem. We have a PDF
we’ve put together showing how the typical Sharp Public Mode setup is performed, but your set could need a
different sequence.
TVs have a problem accessing XXX-1 channels, works fine with XXX-2 and other sub-channels
This bug pops up frequently. The symptom is that, when you watch the TV’s on-screen feedback, the tuner will
show the correct channel, attempts to change the channel, but snaps back to the previous channel. This only
happens with -1 channels; channels that have a -2 and above minor channel will work fine. The problem is
frequent enough that we have a fix for this in our Sharp code:
 In Display Express software, send a Special Command with the text “H9,1″ to the affected Sharp sets
 In IC Send, use an H9 in the first field, 1 in the second, and the device # or Zone, then Send the
command
 Send the H9,1 command from your control software
 If all the Sharps in system have this issue, send the command to All controllers (4095) – only controllers
with Sharp protocol will be affected