![background image](http://html1.mh-extra.com/html/barco/galaxy-nh-12/galaxy-nh-12_service-manual_3838748069.webp)
7. Electronic parts and servicing procedures
Image 7-58
Light feedback board:
fi
xing screws of the cover
4. Install the rear cover (see concerning chapter)
7.6
Start pulse generator (SPG)
Overview
•
•
•
•
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.
Image 7-59
SPG: start pulse generator
R59770141 GALAXY NH-12 20/02/2008
65
Summary of Contents for Galaxy NH-12
Page 1: ...Galaxy NH 12 Service manual R9040400 R59770141 00 20 02 2008...
Page 4: ......
Page 12: ...1 Safety guidelines 8 R59770141 GALAXY NH 12 20 02 2008...
Page 42: ...6 Projector layout 38 R59770141 GALAXY NH 12 20 02 2008...
Page 142: ...8 Optical parts and servicing procedures 138 R59770141 GALAXY NH 12 20 02 2008...