xpgafgsd

Moderator: Angel

Post Reply
oldtech
Contributor
Contributor
Posts: 8
Joined: Tue Jun 02, 2009 4:27 am

How to Test the DMD Board and/or Power Supply?

Post by oldtech » Tue Jun 09, 2009 2:25 am

My HL-R4677W has not responded to transplant/treatment [replaced lamp and ballast] from Samsung's authorized parts seller]. Set still cycles as before with no picture or sound and the fans and color wheel spin when set is powered up. Also, the whistling noise still cycles from the center of the set. I checked the two pin jack on the DMD board that supplys voltage to the
ballast through the brown and blue leads and it reads a nominal 315VDC. What should it be? Also swapped the original light engine for the new one to eliminate a defective "new" lamp. No help.

What other voltage readings are available for troubleshooting the DMD board and Power Supply? Thanks in advance.

User avatar
Eddie
Moderator
Moderator
Posts: 221
Joined: Thu Mar 12, 2009 8:58 pm
Contact:

Re: How to Test the DMD Board and/or Power Supply?

Post by Eddie » Sat Aug 01, 2009 7:52 pm

Where did you buy the parts? Samsung Authorized Reseller means nothing to this forum. We go with OEM parts from Authorized OEM providers.. a whistling noise might be a color wheel
--
Eddie

UgofUp
TV Wizard
TV Wizard
Posts: 483
Joined: Fri Apr 24, 2020 11:17 pm

xpgafgsd

Post by UgofUp » Wed Nov 16, 2022 5:21 am


Post Reply

Return to “Akai DLP Discussion”