- Fixing defective DLP DMD chip? - 3 Updates
| John Robertson <spam@flippers.com>: Sep 11 02:09PM -0700 On 2019/09/09 9:43 a.m., John-Del wrote: >> Damn. Should have bought from them! >> John :-#(# > One of my buddies had a contract with a city near us to maintain their projectors, and they changed TONs of those. If you're planning to keep the projector for a few more years, I suggest buying one of the remaining new DMD chips. Hi John, What do you recommend for the heatsink compound/film for the DMD chip? Also the face of this new chip (from Mouser) appears to be dusty, they simply packed the chip without any plastic wrapping in an antistat.com foam box. Is there any way to clean it or do I take this up with Mouser? Thanks! John :-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| John Robertson <spam@flippers.com>: Sep 11 02:14PM -0700 On 2019/09/11 2:09 p.m., John Robertson wrote: > foam box. Is there any way to clean it or do I take this up with Mouser? > Thanks! > John :-#)# Looking closer I see that there is a clear window, I assume I can clean that using similar practices used on camera lens... So, just what does it need for the heatsink junction is my question. I don't trust youtubers that much. John ;-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| John-Del <ohger1s@gmail.com>: Sep 12 07:05AM -0700 On Wednesday, September 11, 2019 at 5:14:18 PM UTC-4, John Robertson wrote: > So, just what does it need for the heatsink junction is my question. I > don't trust youtubers that much. > John ;-#)# The DMD chips supplied by Mitsu and Samsung included the same thin thermal pad they were originally equipped with. The few that I swapped from donors I used Dow 340 (my favorite heat sink compound). You certainly can use Arctic Silver or other similar compound. I don't think that chip gets particularly hot in any case. The front window is uncoated glass, and you can use anything on it to clean it. I'm concerned with the dust though.. Mouser has always been a good supplier but I wonder if the DMD chip you got isn't a used one. Before installing it, look at it under a strong eye loop while slowly rotating it. Any stuck pixels will stand out. |
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