Epson PowerLite 5000, Service Manual

Page: 51 / 127

EPSON PowerLite 5000 Service Manual
2-21
The signals from the receptor board (FI board/RI board) are sent to the FR board and are
used for wireless mouse control (controlling the host computer via the remote control).
The signals from the filter cover switch are sent to the main board. If the filter cover is
open, power cannot be supplied. The signals for controlling serial operations and the
receptor board signals are sent from the FR board to the CN board.
2.9 RECEPTOR BOARD (FI/RI BOARD)
This board detects infrared signals. This unit consists of two receptor boards: one is
attached to the speaker bracket on the front face (FI board), and the other is on the rear
case (RI board). You can control this device on both sides. The FI and the RI are different
in shape, but the same in function (circuit).
Receptor Boards and Their Circuits
RI board (rear) FI board (front)
Figure 2-19
FI Board Circuit RI Board Circuit
Figure 2-20
Each receptor board is connected to CN203/204 on the connector board. Each board’s
output signal (serial data) is connected to CN802 on the main board via CN200 after wired
OR is applied.
R300
47
2
2 1
1
2
361FI
IC300
GP1U102X
CN300
S38-PH-K
GND VCC 1 2 1 4
GND VOUT
1 1
2
3
C300
0. 1U
16 V
2
1
CHIP
3 3
F
2
361RI
IC400
GP1U102X
CN400
B38-PH-K-S
R400
47
GND VCC 1 4
GND VOUT
1
3
C400
0. 1U
16 V
2 2
1
CHIP
3 3
F
2