R5906848 /04 DP2K SLP Series348
Situation Solution
Laser bank is off due to other
laser bank related errors.
Look in the projector log files for error entries for this specific laser bank
before it was turned off (other than this error).
These errors are of the format “LDM 1–x – LLS bank y [error name]”.
Resolve these errors first.
Laser bank didn't switch on
because of failing self-test
While the projector is in service mode, go to Communicator and go to
Diagnostics >> actual >> Currents. Check the current of the laser bank.
1. No current: Check / reseat the cabling between LDM module and light
source laser bank. Check / reseat the cabling between Light source
and Light source PCB.
2. Current ≤ 630 mA: Check the light sensor functionality, the cabling and
the mounting (check for errors mentioning one of these).
Also check the optical alignment to maximize light output.
Bad / No connection between
LLS and LDM board
Check / reseat the cabling between the LDM board and LLS. Check the
connector on the laser subassembly PCB.
Error appears on 3
consecutive laser banks,
controlled by the same LDM
board: Defective laser driver
Temporary swap 2 Laser driver boards of the same type in the LDM and
check for the “bank x is off” messages. Ignore any other new messages
triggered by this swapping.
If the warning changes to other laser banks, replace the LDM driver board.
See service procedure “Replacing a driver board in an LDM unit”, page 48.
If the warning remains on the same laser bank(s), do the following in order
and check if the error has disappeared after each action.
• Check/measure the fuse behind the LDM driver board (Image 25-90). If
it has blown, replace it.
• Replace the cable between LDM board and light source.
• Replace the entire LDM. See service procedure “Replacing a Laser
Drive Module”, page 56.
• If problem persists after replacing the LDM, the laser banks are
defective. Replace the light source.
Note: Do not forget to place the swapped LDM boards back in their
original position after the check has been completed.
Defective laser bank Replace the light source. See service procedure “Laser Phosphor Light
Source”, page 59.
Image 25-90: Location of the Fuse.
Code 20102: “LLS – Bank 2 is off”
For this error the same troubleshooting table can be applied to as for code 20101: “LLS – Bank 1 is off”.
Troubleshooting
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