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4 Troubleshooting
This section provides troubleshooting procedures that can help direct you to the most likely cause of a specific
performance problem. See this section if you cannot eliminate the problem through proper adjustment of the
projector. Note the symptoms present and work through the appropriate troubleshooting steps to determine the
source of the problem. For more information on troubleshooting a displayed image, see the product's User
Manual.
The D4K25 offers a comprehensive system of diagnostics, tracking a wide range of conditions and alerting the
operator to a potential problem by display specific status information at the Touch Panel Controller (TPC) or
by the available internal or external LEDs.
This system includes:
TPC Status Menu
TPC Alarm Windows
External Projector Status LEDs
Internal PCB-specific LEDs and Main AC status LED
If warnings and errors reported at these locations cannot be resolved by the operator or administrator, further
troubleshooting by a qualified service technician may be required. When troubleshooting, keep in mind that
the projector is comprised of numerous replaceable modules, such as printed circuit boards, optical assemblies
and power supplies. This modular design can reduce the amount of time required to accurately diagnose and
resolve a performance issue — the cause need only be traced down to the module level, at which point the
faulty module is usually replaced. No further analysis is necessary.
4.1
Projector will not turn on to full power mode from standby
• Check TPC for error messages and LEDs for projector status. Resolve reported condition(s) as required. If
failure with PIB3G communications exists, try reseating the board. Check Ethernet status LED on rear of
TPC.
• Check if internal fans are running. If not, look through the rear, right side grill to see if the power LED is
illuminated. The upper right LED indicates the LVPS has power and the lower left LED indicates Main
input. If green LEDs are not seen, check breaker wiring to terminal strip.
• Check all harness connections between LVPS and Backplane.
• Replace LVPS as the last attempt to resolve the issue.
4.2
Lamp will not ignite
• Check all interlocks and alarm condition in the TPC Status window. Is there a DMD overtemp alarm con-
dition? Resolve reported condition(s) as required.
• Check lamp connection: anode connection, igniter cables are attached and tightened on cathode nut...etc.
• Replace lamp.
• Check Lamp Power Supply (LPS).
D4K25 Service Manual
020-100880-01 Rev. 1 (06-2012)
4-1
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