4. Troubleshooting
Situation Solution
Damaged insulation of the brown/red
wire unit (reference 2 image 4-27 )
of the cold m irror fan (reference 1
image 4-27).
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 w ire unit of the fan is not repairable, r eplace the Cold Mirror fan. See "Removal
of the cold mirror assembly", page 125.
Malfunction Signal Backplane (bad
connection)
Replace the Signal Backplane. See "Replacement of th e s ignal back plane", page 231.
1
2
Image 4-27
Cold mirror fan connection
Code 5441: “engine fan - voltage high” (Warning)
Situation Solution
Malfunction Fan Control board or
SMPS board.
Measure on the Signal Backplane the +24V voltage on pin 9, 10, 11 or 12 of the
connector of the black wire unit which com es from the SMP S board. Se e im age 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. O therwise replace the SMP S board.
See"Replacement of the S witched M ode Power Sup ply", page 281.
Code 5442: “engine fan - voltage too low” (Error)
This error code is probably prec eded by the w a rning code 54
43: “eng ine fan - voltage low”. The same troubleshooting table can be
applied.
Code 5443: “engine fan - voltage low” (Warning)
Situation Solution
Malfunction Fan Control board or
SMPS board.
Measure on the Signal Backplane the +24V voltage on pin 9, 10, 11 or 12 of the
connector of the black wire unit which com es from the SMP S board. Se e im age 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. O therwise replace the SMP S board.
See"Replacement of the S witched M ode Power Sup ply", page 281.
Short circuit or b ad connection.
1. Check the Signal Backplane for bad con nections. Ensure that all wire units ar e
well connected.
(Note that the +24V supply is generated on the SMPS board and enters the F an
Control board and Cinema Control board via the Signal Back plane)
2. Check the wirin g of the A node fan for short circuits.
3. Check the w iring of the Cathode fan for s hort circuits.
Damaged insulation of the wire unit
(reference 21 image 4-28) of the
Light Processor fan (reference 1
image 4-28). N ote that this fan is
located between the Card Cage
compartment an d Light Processor
compartment.
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.
Malfunction Signal Backplane (bad
connection)
Replace the Signal Backplane. See "Replacement of the signal back plane", page 2 31
52 R5905043 DP2K-12C/11CX 19/02/2018
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