Epson PowerLite 5000 Service Manual page 58

EPSON PowerLite 5000 Service Manual
Control Circuit Diagram
EEPROM
(IC603)
Power Supply Unit
65 VDC Regulator
Lamp Inner
Housing
Lamp
Fuse board (FU board)
This board has a 62 mA rated fuse. The terminal sections placed on the both ends of
this board touch the FC board installed on the base of the light guide unit. The cable of
the FC board is connected to connector CN250 on the driver board, so the signal from
the FC board is sent to the main board via the connector CN100. When the total running
time reaches 2000 hours, IC600 on the main board outputs an LFUSE signal, so the
Buffer
(IC618)
CN800
FC
Board
+5 V_A
CN250
1 2
Figure 2-27
Lamp Indicator
Controller
(IC600)
Main Board
+5 VDC
BACT
LPST
33
CN700
CN700
Signals:
LTPCL: Light power supply control signal
LSTAT
LPFAL: Light power supply failure
(less than 6 V output or no current)
LLIFE: Lamp life
Driver Board
LFUSE: FU board fuse is blown
2-28
Generator
(X500)
IC800
LPCTL
LPFAL
LLIFE
LFUSE