Barco DP2K-12C Service Manual page 56

4. Troubleshooting
Situation
Damaged insulation of the brown/red
wire unit (reference 2 image 4-27)
of the cold mirror fan (reference 1
image 4-27).
Malfunction Signal Backplane (bad
connection)
1
Image 4-27
Cold mirror fan connection
Code 5441: "engine fan - voltage high" (Warning)
Situation
Malfunction Fan Control board or
SMPS board.
Code 5442: "engine fan - voltage too low" (Error)
This error code is probably preceded by the warning code 5443: "engine fan - voltage low". The same troubleshooting table can be
applied.
Code 5443: "engine fan - voltage low" (Warning)
Situation
Malfunction Fan Control board or
SMPS board.
Short circuit or bad connection.
Damaged insulation of the wire unit
(reference 21 image 4-28) of the
Light Processor fan (reference 1
image 4-28). Note that this fan is
located between the Card Cage
compartment and Light Processor
compartment.
Malfunction Signal Backplane (bad
connection)
52
Solution
Remove the top cover of the projector, pull out the top dust filter to access the fan
connection. Check the insulation of the wire unit.
1. Repair the insulation of the wire unit using shrink sleeve.
2. If the wire unit of the fan is not repairable, replace the Cold Mirror fan. See "Removal
of the cold mirror assembly", page 125.
Replace the Signal Backplane. See "Replacement of the signal back plane", page 231.
2
Solution
Measure on the Signal Backplane the +24V voltage on pin 9, 10, 11 or 12 of the
connector of the black wire unit which comes from the SMPS board. See image 4-26.
If the measured voltage is about 24V then replace the Fan Control board. See
"Removing a board in the card cage", page 213. Otherwise replace the SMPS board.
See"Replacement of the Switched Mode Power Supply", page 281.
Solution
Measure on the Signal Backplane the +24V voltage on pin 9, 10, 11 or 12 of the
connector of the black wire unit which comes from the SMPS board. See image 4-26.
If the measured voltage is about 24V then replace the Fan Control board. See
"Removing a board in the card cage", page 213. Otherwise replace the SMPS board.
See"Replacement of the Switched Mode Power Supply", page 281.
1. Check the Signal Backplane for bad connections. Ensure that all wire units are
well connected.
(Note that the +24V supply is generated on the SMPS board and enters the Fan
Control board and Cinema Control board via the Signal Backplane)
2. Check the wiring of the Anode fan for short circuits.
3. Check the wiring of the Cathode fan for short circuits.
Check the insulation of the wire unit of the fan. The fan is accessible via the Card Cage.
1. Repair the insulation of the wire unit using shrink sleeve.
2. If not repairable, replace the whole wire unit and/or fan. See "Light processor
compartment fan", page 316.
Replace the Signal Backplane. See "Replacement of the signal back plane", page 231
R5905043 DP2K-12C/11CX 19/02/2018