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Polaroid tda03211c - no video   Goto page 1, 2, 3  Next  
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Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Tue Jun 14, 2016 4:04 pm    Post subject: Polaroid tda03211c - no video Reply with quote

I have a Polaroid tda03211c. When I hit the power button the led changes to blue and I can hear the dvd player turn on, but I have no picture at all. I replaced all the capacitors on the power board (cause I noticed a few swollen ones). Screen is still just black. I checked all the connections inside and they all seem fine. I shined a flashlight on the screen and didn't see anything so I'm assuming it isn't a Backlight issue. Can anyone point me in the right direction to properly diagnose this issue?
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JTS1957



Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away

PostPosted: Tue Jun 14, 2016 4:53 pm    Post subject: Reply with quote

Check D10; EC17 & EC18
Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Tue Jun 14, 2016 9:07 pm    Post subject: Reply with quote

Ec 17 and 18 are good. I'm getting a .4 voltage drop at that diode, but it's still attached to the board. It says in my (Multimeter) manual that it should be between .5 and .8 Do you think it's bad?
JTS1957



Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away

PostPosted: Tue Jun 14, 2016 9:24 pm    Post subject: Reply with quote

Disconnect (float) one side and retest.
Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Tue Jun 14, 2016 9:46 pm    Post subject: Reply with quote

I pulled it off. The first time I checked it it started at .550 and kept climbing. The second time I checked it it stayed around .681 and didn't really change.
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JTS1957



Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away

PostPosted: Wed Jun 15, 2016 1:43 am    Post subject: Reply with quote

Which Power Supply? According to SJ there were three possible used in that model.
Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Wed Jun 15, 2016 7:44 am    Post subject: Reply with quote

It looks like it's a tc18813f. I couldn't figure out how to post a photo.
Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Wed Jun 15, 2016 8:49 am    Post subject: Reply with quote

I tested that diode (uninstalled) and it read .4. I'm going replace it cause it doesn't seem to be acting the way it should. I read somewhere that the Mur420 is a good upgrade to the stock Her303. Is this true or should I just stick to the original equipment?
JTS1957



Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away

PostPosted: Wed Jun 15, 2016 9:11 am    Post subject: Reply with quote

With meter on Diode test, over-range with one polarity of test leads - .4 in the other, sounds just fine to me.

Part number can be found on a sticker.
SJ has pictures
Thisisbuod



Joined: 30 May 2016
Posts: 22
Location: MD

PostPosted: Wed Jun 15, 2016 11:46 am    Post subject: Reply with quote

So, if the diode and those capacitors are good, what should I look at next?
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