Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default InFocus LP420 video projector

Dumped but with what looks like a brand new lamp inside.
I assume the projector failed and owner bought a new lamp but because a bit
of a work up changing them , left it inside. Lamp reset sequence makes no
difference, factory reset is via Menu screen. No response to the control
panel buttons as far as the same LEDs stay the same. I've found the control
line for lamp-on and taking the downstream side of its opto coupler H , the
discharge lamp triggers and works fine .
The so-called service manual out there is no help as board-level replacement
"repair" only. All solder except the BGAs (as unseen) seem ok
All DC levels for the controllers seem ok. As this lamp-on control rapidly
goes to one of the 2 BGA proprietries labelled PENG and GUIN (have to be
called something) is that the end of any repair?
I will reassemble , now with a usable lamp , and see if anything turns up on
the video screen


  #2   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default InFocus LP420 video projector

Replaced a poor ESR 100uF on the main control pcb but no uC control of the
lamp


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
PLEASE Help with Infocus Projector Michael Electronics Repair 0 February 21st 07 09:05 PM
Infocus Projector Question Me Mine Electronics Repair 0 February 19th 07 12:01 AM
Infocus LP335 Projector JP Electronics Repair 0 February 13th 07 10:58 AM
ASK C105 or Infocus LP690 projector Harald O. Karlsen Electronics Repair 2 March 14th 06 05:58 AM
Infocus projector tlfort Electronics Repair 16 October 9th 03 02:30 PM


All times are GMT +1. The time now is 04:00 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"