Sanyo dp42848. No picture no sound?has anyone found the problem

**tomstr** · 12-01-2012, 07:31 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Originally posted by johnboy1313

To the original poster. At this point, it may be time to pull back and rethink things. I recently got a little over anxious and turned a few dollar fix into a 50 dollar fix all because I wanted to get out of my comfort zone without taking time to research. You may be better off storing this thing and keeping an eye on Craigslist for the same tv with a cracked panel for cheap. That way, you will have all of the boards to swap out one at a time until it is working. At that point, you may be able to recover some of your investment parting out what is left. Good luck.

Thanks for the comment,you are right step back is what i need to do.craigslist is were i got this tv,free so i love fixing things,i want to know what is causing the problem.

**tomstr** · 12-01-2012, 01:20 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Originally posted by drpj23

You need a 24V, 8-10A power supply... if you have one, then provide 24V and connect INV-ON to 5VDC and DIM to 5VDC. [per TOM66]

I guess your friend didn't say anything new?

If you want to test your meter you have a reference with your powersupply for 24v.....at least human error is almost completely ruled out that way.

Am i measuring a/c volts or d/c volts for my 24 volt voltage?i have been setting my meter to d/c

**tomstr** · 12-01-2012, 01:25 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Originally posted by tomstr

Am i measuring a/c volts or d/c volts for my 24 volt voltage?i have been setting my meter to d/c

. Left upper on meter d/c v

Attached Files

**tom66** · 12-01-2012, 01:26 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Wrong setting!!! Set to DC200V (the dashed and solid line.)

**budm** · 12-01-2012, 03:16 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

No wonder why we are not getting correct reading.

**tomstr** · 12-01-2012, 04:42 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

The picture of the meter shows ohms thats not were i set it too this picture of the meter is a stock picture of my meter,the setting when testing WAS SET TO D/C 200. So i was reading the meter correctly!so i will check the volts and send a pic of the meter with the setting before i start testing again..

**tomstr** · 12-01-2012, 06:08 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Ok I'm ready do you want me to take the board out and start from square 1.i have the pics of the marked circuits?AND WHAT DO YOU WANT MY METER SET TO?

**tomstr** · 12-01-2012, 08:39 PM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Hello!!

**tomstr** · 12-02-2012, 09:40 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Originally posted by tom66

Wrong setting!!! Set to DC200V (the dashed and solid line.)

Can anyone help me today. Sunday?just thought i whould ask if not my day off is tuesday

**tom66** · 12-02-2012, 09:48 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

I am really completely lost now.

Do you or do you not have 24V?

**tomstr** · 12-02-2012, 10:14 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

No I have tried every meter setting no 24 volts should I start from step 1 or?

**tomstr** · 12-02-2012, 10:21 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Here is my meter setting

Attached Files

**tomstr** · 12-02-2012, 10:24 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

I back probe the the wires while there plugged in,turn on the tv and 0 volts at 24v side of plug.

**tomstr** · 12-02-2012, 10:45 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

This is a pic of how i test

**tomstr** · 12-02-2012, 10:48 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Meter

Attached Files

**tomstr** · 12-02-2012, 10:49 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Another pic

**tomstr** · 12-02-2012, 10:51 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Here is the meter results

Attached Files

**selldoor** · 12-02-2012, 10:53 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Your attachments are failing?
Not often Tom gets in a twist.
ok fresh start - check meter ohms 200 touch probes
reading +?

tv connected and all set up powered on
meter on 200vdc black probe on ground screw in corner of power board where it says made in china and the socket CN2
With the red probe test each pin and list the results in a column:
pson =
sgnd =
sgnd =
+5vsb = and so on.

Answer the next part in a new reply post.

Did you test the "Pink" fusible resistors for continuity
Meter on Ohms 200 probe on each end.

Answer the next part in a new reply post.

Did you read the link in post24 problem was very similar and it was on a sanyo
It will show you that even if the fault IS known it cannot Always be fixed - I think in that case the OP cut that bit of the circuit out and used something else.

Also do not refer to a component as a circuit if you do not know what it is ask and/or refer to it as a component. Otherwise it is quite confusing.

**tomstr** · 12-02-2012, 10:58 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Ok step 1

**tomstr** · 12-02-2012, 11:00 AM

Re: Sanyo dp42848. No picture no sound?has anyone found the problem

Here is the first step

Attached Files

Sanyo dp42848. No picture no sound?has anyone found the problem

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