4. Troubleshooting
Code 5573: “lamp rear 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 2 image 4-32) o f the fan
(reference 1 image 4-32).
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 whole wire unit and/or fan. See "Lamp Info M odule
fan", pag e 329.
Malfunction Signal Backplane (bad
connection, reference 3 image 4-32)
Replace the Signal Backplane. See "Replacement of th e s ignal back plane", page 231.
1
2
3
Image 4-32
Lamp rear fan connections
Code 56 21: “electronics fan 1 (top side) - 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 Contr
ol 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 56 22: “electronics fan 1 (top side) - voltage too low” (
Error)
This error code is probably pr eceded by the w arning code 5623: “electronics fan 1 (top side) - voltage low”. The same troubleshoot-
ing table can be applied.
Code 56 23: “electronics fan 1 (top side) - 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.
56 R5905043 DP2K-12C/11CX 19/02/2018
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