JVC 340 SC - Manual (Page 83)

Chapter 2—Functional Description
Model 330, 340SC and 370SC Service Manual 2-71
/LEDBL1 Brightness
/LEDBLO Brightness
RS-232 Interface Signals
RS232 #1 RS232 #2 Description
RXD1 RXD2 Receive data
TXD1 TXD2 Transmit data
/CTS1 /CTS2 /Clear to send
/RTS1 /RTS2 /Ready to send
DCD1 Carrier detect
COMRTN Return
IR Interface
Input Description
/RIRIN Input from rear IR Receiver
/EXTIRIN Differential input from IR Receiver
EXTIRIN Differential input from IR Receiver
/FIRIN Input from front IR Receiver
Backplane Board p/n 100571
The Backplane is a PCB that serves as an interconnecting point for the tethered
and IR remotes, power supplies, CRTs, Yokes, ILA
®
assemblies, PCBs and
external video. The Backplane does not modify signals in any way—it merely
provides an interfacing point for most of the wiring in the projector in lieu of
cabling. Refer to Figure 2-18 for a general idea of how the wiring is
interconnected in the projector.
Backplane
CRTs,
Yokes,
Video Amps
Video and
Deflection
Signals
System
Power
Supply Power
Control
External Video
Signals
Tethered
Remote
or PC
ILA Biases ILAs
Opt
ica
l
PCBs
High
Voltage
Power
Supply Power
Control