[Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

[ben7]

Got this Insignia NS-LTDVD19-09 here, it has an issue with the DVD player.

(It's a TV/DVD combo. Appears that there is a similar make with a tan power board, and a different main board. This one I have has a black power board and a big main board)

The PSU had one bad cap by the inverter circuitry, but it wasn't the cause of any issues. The TV behaved just the same after replacing the cap. (It was a teapo 470uF 25V, SC series I think. Replaced with a taicon cap, not the best, but it is the best replacement I have on hand spec-wise (Damn that tiny teapo cap was rated for a large ripple current!))

The issue:
It keeps ejecting the discs back out.
Tried different DVDs, tried cleaning the laser lens.
Checked the spindle motor, it turns the DVD for a moment when it tries to detect the disc.

Next thing I want to try is adjusting the laser power. But the two trimpots seem to be partly burnt out (possibly?), as they don't show any resistance for most of the turn. They show about 10 to 300 ohms for only about 30% of the turn.
From when I opened up the DVD unit, one pot was at full CCW position, and the other was about 40% of the way. (Going from fully CW towards fully CCW postion.)

FYI, I CAN see the laser lighting up, but is it still possible that it isn't powerful enough?

I was told that to use the DVD player you'd have to put the DVD in multiple times until it would accept the DVD. Now it won't accept it no matter how many times you try.

Any advice?

Thanks,
-Ben

[Alastair E]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

So--Disc in and wont achieve TOC....?

Then it spits it out....

Laser (Or its Proper name, Optical Block) is probably stuffed. Altering its power wont help in my experience, its the optics themselves that either deform fractionally with age or are contaminated with dust/crud. Impossible to clean properly as you need to dismantle--and once you do that--you'll Never ever get it back EXACTLY as it was before it was dismantled--These things are assembled Incredibly accurately, and have glue/resins etc holding it all exact.
--To Add to the confusion--DVD Laser optical blocks have Two Laser light sources that are switched depending on either DVD or CD being read
--Blu Ray machines have Three!.....

Only option is replacement Optical Block--IF you can find one....

May be worth disconnecting disc table-motor running it Backwards for 20 seconds using Small 9V batt then Forwards for 20 sec, try again. Ive cured temporarily duff motors this way...

[ben7]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

So--Disc in and wont achieve TOC....?

Then it spits it out....

Laser (Or its Proper name, Optical Block) is probably stuffed. Altering its power wont help in my experience, its the optics themselves that either deform fractionally with age or are contaminated with dust/crud. Impossible to clean properly as you need to dismantle--and once you do that--you'll Never ever get it back EXACTLY as it was before it was dismantled--These things are assembled Incredibly accurately, and have glue/resins etc holding it all exact.
--To Add to the confusion--DVD Laser optical blocks have Two Laser light sources that are switched depending on either DVD or CD being read
--Blu Ray machines have Three!.....

Only option is replacement Optical Block--IF you can find one....

May be worth disconnecting disc table-motor running it Backwards for 20 seconds using Small 9V batt then Forwards for 20 sec, try again. Ive cured temporarily duff motors this way...

So the optical block is probably dead, eh?

Why would running the motor like that make it work again?

[Alastair E]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

The Motor issue is separate, and on some cheapo players Ive worked on sometimes sorts the motor out for a while...

IF the Optical Block is dead--there's no option but replacement.

[ben7]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

The Motor issue is separate, and on some cheapo players Ive worked on sometimes sorts the motor out for a while...

Hahaha, that's really strange. Some fine tolerances between working and not working ... lol

IF the Optical Block is dead--there's no option but replacement.

Yeah I guess so. Looks like the set is trash then.

When the dvd gets put in, the spindle motor moves the disc a little ways (maybe one full rotation or so) in one direction and then changes direction for less than a full revolution, and then it stops. Is that normal? It does that twice. The focusing lens is moving up and down as well.

[Alastair E]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

The pumping of the Objective Lens is it trying to achieve Foc-OK--and failing....

Gets more like the optical-block all the time....

[ben7]

Re: [Insignia NS-LTDVD19-09] DVD player keeps ejecting discs

The pumping of the Objective Lens is it trying to achieve Foc-OK--and failing....

Gets more like the optical-block all the time....

Ok.

Thanks for the help!