Question about Philips Magnavox 50ML8105D 50" HDTV DLP TV
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Posted on Jan 02, 2017
What you're describing is probably contaminated coolant in the crts. Between the outer part of the crt and the lens is a chamber filled with a coolant (ethyl-glycol) which can become contaminated and cause blurred picture. I'd strongly recommend taking this to a shop the procedure for changing these is a bit beyond the layman level.
Remove Crt assembly. Mark the Crt lens position for accurate reasssembly.
Mark the centering ring's postions to make easier realignment and carefully remove lens assembly by removing the four torx screws. Keep Crt assembly vertical so you won't leak the fluid...
Remove the inner lens by carefully prying up on the edge of it.
Dump out the fluid in the sink and wash the face of the Crt and chamber with water to remove all the fungus and crud. Flush the chamber with isopropyl alcohol to kill all the fungus and dry thoroughly.
Reassemble inner lens and outer lens and tighten all four torx screws.
Remove side filler plug and fill chamber with approved new Crt coolant, reinstall and converge.
Repeat this procedure for the other two Crts. It will need this done whether it looks clear or not !! The green and blue Crts in this unit are prone to this failure.
Hope this helps
Posted on Nov 14, 2007
It could be the flyback losing resistace in its windings. What is the chassis number I should have the service manual for it. Phillips/magnavox is hard to cross reference without the actual chassis number.
Posted on Feb 11, 2008
You can also get a Factory Service manuals from www.magnavoxhelp.com. The manuals can be downloaded instantly. They are complete with over 2000 pages in all.
Their manuals cover all projection TV models with Chasis # PTV835, PTV836, PTV840, PTV841, PTV842,PTV843, PTV844, PTV847,PTV853
Posted on Jun 24, 2008
SOURCE: no color adjustment
*CONVERGENCE SERVICE MODE PROCEDURES*
*Note: This procedure is required for all of the following geometry and
*Using the remote transmitter, enter the following seven-button sequence to
activate the convergence mode.*
* 06 - 25 - 97 - Menu (M)*
*The "Opening Menu" will appear offering choices:*
*Use Channel up/down to*
*Select a Channel with Video*
* Remote control key functions:*
* Use arrow up/down and left/right: Adjust Convergence*
* M: Advance "cross" location*
* Up, Down, Left, Right*
* 3: Exit Convergence*
* Status: Abort/Cancel Changes*
* M: Begin Convergence*
*Note: video information must be present to correctly adjust the
convergence. A signal source is required to lock the vertical and
horizontal sync. After entering the "convergence service mode" verify the
presence of a video source by confirming the presence of active audio (use
the volume up function on the remote). Use the channel up and down function
on the remote to select the desired tuning source.*
*Select item "M" from the first menu, the "Convergence Menu" will appear
featuring 5 possible selections.*
* Channel 3*
*1. green geometry*
*2. red To green Convergence*
*3. blue To green Convergence*
*4. green To red Convergence*
*5. green To blue Convergence*
* Status: Abort/Cancel Changes*
*CONVERGENCE TOUCH UP PROCEDURE*
*1. Enter the "convergence service mode" as described above in the
"convergence service mode procedure".*
*2. Select the desired color requiring adjustment. Note: Do not
select Green Geometry (1). This procedure is described under "Major
Convergence/Geometry Alignment. If Green Geometry is altered during this
procedure a "Major Convergence/Geometry Alignment" maybe required. *
*3. Cover the Output Lens of the single color presently NOT being
adjusted. Example: If you select Green to Red Convergence (4) cover the Blue
*4. The highlighted adjustment Icon (Cross) should be illuminated on
the middle left side of the screen. Make the necessary Convergence
Adjustments using the following Remote Keys:*
*· Use the Arrow Up ( ) to adjust the selected color up.*
*· Use the Arrow Down Key ( ) to adjust the selected color down.*
*· Use the Arrow Right Key (-) to adjust the selected color to the
*· Use the Arrow Left Key (+) to adjust the selected color to the
*5. Move to the next location to be converged. It is not required
that the full Convergence Sequence be followed while performing the
"Convergence Touch Up Alignment Procedure". The following alternate Remote
Keys allow for positioning of the Icon to the desired adjustment location:*
*· Key 2 on the Remote Transmitter will position the Adjustment
Icon upward on the screen.*
*· Key 8 on the Remote Transmitter will position the Adjustment
Icon downward on the screen. *
*· Key 4 on the Remote Transmitter will move the Adjustment Icon
to the Left.*
*· Key 6 on the Remote Transmitter will move the Adjustment Icon
to the Right.*
*6. Return to the "Convergence Service Menu" by selecting Key number
3 on the remote transmitter or by sequencing the Icon to the last adjustment
point at the lower right corner of the screen and pushing the Menu (M) Key
on the Remote Transmitter..*
*7. Repeat steps 1 through 6 for other required Convergence
*8. To Save the Adjustment completed in the last procedure,
Exit/Save the Convergence Service Mode by selecting Key 1 on the Remote
Transmitter. This forces the corrections to be written to the EEPROM on the
*Note: To save the convergence corrections made above you must exit the
convergence menu by selecting Exit/Save Data (1)*
Posted on Jul 05, 2008
SOURCE: Warped Picture, Separated colors
You have a convergence problem. Here are some of the most common symptoms.
Screen looks 3D
One or more colors can't be adjusted when when using the convergence menu.
Screen is bowed in but stationary.
You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kit for your exact model. The kit inlcludes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself.
Posted on Nov 28, 2008
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