4. Troubleshooting
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Image 4-35
Mains and CTLB connection LPS
Code 5641: “lamp power supplies - lamp is on, but smps is off” (Error)
Situation Solution
Malfunction SMPS module. Replace the SM PS module. See "Replacement of the Switched Mode Power Supply",
page 281.
Malfunction LPS mod ule. Replace the LP S m odule. See "Lam p power supply", page 283 or "Lamp power supply
(single m odule)", page 291.
Defect Signal Backplane. Replace the Signal Backplane. See "Replacement of the signal back plane", page 231.
Code 56 42: “lamp power supplies - at least one lamp power supply c ould not be detected” (Error)
Situation Solution
Main power cable disconnected
from on e of the LP S units (reference
1image 4-35).
Check if t he main power cab le is connected with the “M AINS INPUT” socket of the
LPS unit.
Malfunction of one of the LPS
units. The red LED “ERR” of the
malfunction LP S unit flashes fast.
Replace the whole LPS module. See "Lamp pow er supply", page 283 or "Lamp power
supply (single module)", page 291.
Code 5643: “lamp power supplies - communication failed with at least one lamp power supply”
(Error)
Situation Solution
Main power cable disconnected
from on e of the LP S units (reference
1image 4-35).
Check if t he main power cab le is connected with the “M AINS INPUT” socket of the
LPS unit.
Malfunction of one of the LPS
units. The red LED “ERR” of the
malfunction LP S unit flashes fast.
Replace the whole LPS module. See "Lamp pow er supply", page 283 or "Lamp power
supply (single module)", page 291.
R5905043 DP2K-12C/11CX 19/02/2018 59
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