Barco Galaxy NH-12, Service Manual

Page: 58 / 146

7. Electronic parts and servicing procedures
Schematic overview
X-fan supply
24 VDC
380 VM
controller
PWM
EID
interconnection between power box and small fans
++12 V
from PB
+380 VM
I2C
ctrl
main fans (3)
amb sensor
AC
to PELTIER
DC
to fan
NA
+24VDC X-fan ok ERR
power FANS
Image 7-36
X-fan supply: block diagram
LED diagnostics
Four LED’s are available on the X-fan supply
LED
number
LED color Description
1
orange
ON when +24V is active (active state of the projector)
2
green
not applicable
3 red
ON if the power box sends an interrupt to the projector control and the projector control does
not read this interrupt
4
orange
BLINKS (with a frequency of 1 sec) when the X-fan supply control is OK
7.3.2 Removing the X-fan supply
Necessary tools
• Torx screwdriver T10
• Nut spanner 7 mm
In pictures below, the power box + X-fan supply assembly has been removed from the projector fi rst. However,
the X-fan supply can be removed from the power box without taking the assembly out of the projector! The
way to remove the X-fan supply is exactly the same in both cases.
How to remove the X-fan supply?
1. Remove the covers (see concerning chapters):
54 R59770141 GALAXY NH-12 20/02/2008