I need a service manual for mitsubishi dlp WD82738

SOURCE: mitsubishi dlp 52525 garbled rolling picture

You most likely have defective capacitors in your electrical chassis. It's best to send the entire chassis back to the manufacturer for total rebuilding. The cost is about $350 + labor, unless you can remove the chassis yourself.
Good luck.

SOURCE: Mitsubishi dlp tv picture is getting darker

One of two possible issues:

1. Lamp is nearing end of life and may dim just before total failure.

2. A few of these models have 2 mirrors(check with Mitsubishi to see if yours is one) A large mirror in back (never gives a problem and do not try to clean it. Some idiot in these sets used a small mirror inside that the optical unit shines the picture into (wedge shaped mirror and small) and it is facing up----the fans intake air from the front of the set around this mirror--it gets coated with lots of dust---Picture can loose up to 70% of its brightness and clarity if that mirror is dirty--looks like 20 year old set .

If you do not wish to check with Mitsubishi GOOGLE THE MODEL NUMBER with "mirrors" to see.

If it has 2 mirrors I can tell you exactly how to get at it.

SD TECH

SOURCE: i need manual for mitsubishi dlp tv 62 inch model wd-62627

Owner manual or service manual?

Try to Google the model number for either or visit the Mitsubishi site for the owner manual.