JVC 250 Service Manual page 141

Chapter 7---Troubleshooting
Figure
7-1 Rear Panel layout
Control Out - The Control Out terminal is another RS232 port similar to the
Terminal In port except that it can not be used to Import/Export setup data.
Tethered Remote Jack - The Model 250 projector is shipped with an IR Remote
Control. This IR Remote can be used with an optional 150 ft. cable that will plug
in the Tethered Remote Jack.
IR Detector - This sensor detects commands from the IR Remote Control included
with the projector. There is another IR Detector on the front of the projector.
Switch Block - The Switch Block controls various parameters of the CPU. Most
of the switches are for diagnostic functions performed at the factory and will not
need to be changed. They should all be in the DOWN position. The switch that
will be of most concern to the field technician is the #4 switch that controls the
baud rate of importing and exporting data and software. The UP position sets the
baud rate at 19200 BPS and the DOWN position is 9600 BPS. 9600 BPS
(DOWN) is the factory default setting.
Model 250 Service Manual 7-3