Lamp Power Supply (Lps); Description Of The Lps - Barco Galaxy NH-12 Service Manual

7. Electronic parts and servicing procedures
7.5

Lamp power supply (LPS)

Overview
•

Description of the LPS

• Removing the LPS
• Installing the LPS
• Replacing the Light feedback board
7.5.1 Description of the LPS
Description
To ignite the lamp, the voltage on the output pins of the lamp power supply is increased to 140V. This voltage will trigger the Start
Pulse Generator (SPG), which will trigger a high-tension peak to ignite the lamp. When the lamp is on, the voltage on the output
pins of the LPS comes to its normal level of 25V.
The LFR sensor measures the lamp flicker and provides a signal for the light feedback board, which is part of the LPS assembly.
This signal is used to reduce the lamp flicker.
In case of failure the LPS assembly is replaced as a unit.
Image 7-48
LPS: lamp power supply
60 R59770141 GALAXY NH-12 20/02/2008