4. Troubleshooting
Situation Solution
Malfunction Fan & Motor Control
board.
Replace the F an & Motor C ontrol board. See "Removing a b oard in the card cage",
page 213
Malfunction signal backplane Replace the signal back plane, see "Replacem ent of the signal b ack plane", page 231.
Code 5393: “dmd blue fan - voltage low” (Warning)
Situation Solution
Malfunction SM PS module. A ll other
fans also report voltage low error.
Replace the SMPS module. See "Replacement of the Switched Mode Power Supply",
page 281
Damaged insulation of the wire unit
of the DM D blue fan.
Remove the Light Processor f rom the projector and check the insulation of the wire
unit of the fan.
1. Repair the insulation of the wire unit using shrink sleeve.
2. If not repairable, replace the who le wire unit and fan.
Malfunction Fan & Motor Control
board.
Replace the F an & Motor C ontrol board. See "Removing a b oard in the card cage",
page 213
Malfunction signal backplane Replace the signal back plane, see "Replacem ent of the signal b ack plane", page 231.
Code 5431: “cold mirror 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.
12 24
+24V
11 23
10 22
921
820
+VTEC
GND
719
618
517
416
315
++12V
214
113
24
24
13
13
Image 4-26
Code 5432: “cold mirror fan - voltage too low” (Error)
This error c ode is probably proceeded by the warning code 54 33 : “cold m irror fan - voltage low”. The same troubleshooting table
can be applied.
Code 5433: “cold mirror 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.
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