Start Pulse Generator (Spg); Description Of The Spg - Barco Galaxy NH-12 Service Manual

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Light feedback board: fixing screws of the cover
4. Install the rear cover (see concerning chapter)
7.6

Start pulse generator (SPG)

Overview
•

Description of the SPG

• Diagnostics of the SPG
• Removing the SPG
• Installing the SPG
7.6.1 Description of the SPG
Description
When the LPS signal exceeds its standard 25V value, the Start Pulse Generator (SPG) generates a burst of high voltage peaks to
ignite the lamp. It superimposes the high voltage peaks onto the power signal of the lamp supplied by the LPS. As soon as the lamp
is lit, the LPS voltage drops to 25V again and the SPG stops its activity.
If, after three attempts, the lamp is still not on, the projector switches back to standby mode.
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SPG: start pulse generator
R59770141 GALAXY NH-12 20/02/2008
7. Electronic parts and servicing procedures
65