4. Troubleshooting
Code 5491: “smps 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 5492: “smps fan - voltage too low” (Error)
This er ror code is probably preceded by the warning code 5493: “smps fan - voltage low”. The s ame troubleshootin
g table can be
applied.
Code 5493: “smps fa n - 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 w ire
unit (reference 3 & 4image 4-31)
of the SM PS fans (reference 1 &
2image 4-31).
Check the insulation of the wire unit of the SMP S fans. T he two S MP S fans are located
behind the front filter (two lower fans).
1. Repair the insulation of the wire unit using shrink sleeve.
2. If not repairable replace the Cathode fan. See "Lam p cathode fan", page 31 9.
Malfunction Signal Backplane (bad
connection)
Replace the Signal Backplane. See "Replacement of th e s ignal back plane", page 231.
3
2
1
4
Image 4-31
SMPS fans connection
Code 5571: “lamp rear 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 5572: “lamp rear fan - voltage too low” (Error)
This error code is probably preceded by the warning c
ode 5573: “lamp rea r fan - voltage low”. The sam e troubleshooting table can
be applied.
R5905043 DP2K-12C/11CX 19/02/2018
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