sanyo DP32648 tv will not turn on

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

If its a tiny smt capacitor (around 3mm x 1mm x 1mm box) then you should set your iron to ~ 300 degrees C, and use a tiny bevel, or a pencil tip, contact the solder joints directly while you at the same time pull the part up with tweezers softly. Jump back and forth between each side till you get it to seperate.

[CR Designs]

Re: sanyo DP32648 tv will not turn on

Cashkennedy did you see post 95 ?

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

Oh yeah sorry, forgot to reply to that. No i do not have the base, I have the inverter, speakers, wires, a broken psu. I sold the TCON , and the lvds cable to someone else, and used the good psu to fix my own set.

[CR Designs]

Re: sanyo DP32648 tv will not turn on

cashkennedy,
Thanks for all the help on this TV, You have been great.i guess just wait for the main board to show and hope it works. Should we check anything else?We did not check this see picture circled component

[CR Designs]

Re: sanyo DP32648 tv will not turn on

cashkennedy,
Thanks for all the help on this TV, You have been great.i guess just wait for the main board to show and hope it works. Should we check anything else?We did not check this see picture circled component

listed wrong picture here's the right one

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

Im not sure what that part does, but if you tell me the part number (im at work so not infront of my dp32648) we can try to find a data sheet and figure out if theres an easy way to test it. I do know that 5v runs to maybe pin 3? i was probing around with contuinity and it was one of the few places where 5v power ran.

[tom66]

Re: sanyo DP32648 tv will not turn on

It is an audio amplifier, probably class AB. Less efficient that class D, but lower cost.

[CR Designs]

Re: sanyo DP32648 tv will not turn on

Im not sure what that part does, but if you tell me the part number (im at work so not infront of my dp32648) we can try to find a data sheet and figure out if theres an easy way to test it. I do know that 5v runs to maybe pin 3? i was probing around with contuinity and it was one of the few places where 5v power ran.

here's the part number: A42205 8RN4

[CR Designs]

Re: sanyo DP32648 tv will not turn on

Im not sure what that part does, but if you tell me the part number (im at work so not infront of my dp32648) we can try to find a data sheet and figure out if theres an easy way to test it. I do know that 5v runs to maybe pin 3? i was probing around with contuinity and it was one of the few places where 5v power ran.

gave you wrong part number here it is again LA42205 8RN4

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

As tom said, its a audio amplifier. id assume the large white resistor there is also for that purpose. Most likely its not what is shorting the board, but either way idk how to test an audio amplifier.

https://www.badcaps.net/forum/showpo...2&postcount=44 the part you mention in this post could be the failed part, we never tested it, and i honestly dont know a good way to test it. Pin 1 looks to be the input and Pin 2 or 3 is the output? I could test mine later and tell you what voltages it should have , but that wouldnt prove that the problem is there. Perhaps tom knows how to test that part, should have a diode reading most likely?

[CR Designs]

Re: sanyo DP32648 tv will not turn on

As tom said, its a audio amplifier. id assume the large white resistor there is also for that purpose. Most likely its not what is shorting the board, but either way idk how to test an audio amplifier.

https://www.badcaps.net/forum/showpo...2&postcount=44 the part you mention in this post could be the failed part, we never tested it, and i honestly dont know a good way to test it. Pin 1 looks to be the input and Pin 2 or 3 is the output? I could test mine later and tell you what voltages it should have , but that wouldnt prove that the problem is there. Perhaps tom knows how to test that part, should have a diode reading most likely?

Let me know after you test yours

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

I dont have a multimeter at home that has diode tests, which would probably be the more important test to run on some of these parts...

But i tested that part and have 24v on pin 1, 12v on pin 2, 0v on the tab and the 3rd pin, and ~ 1.5v on both pins 4 and 5.

Pin 2 is 200 ohms from the 5v rail, and pin 1 is >700 ohms, there must be a cap in the way because the resitance rose as i tested it.

Based on my tests above, and the data sheet on this part, im very confused why they would put a part to convert 24v to 12v, when they already had a 12v rail going to the mainboard >.> , it does allow a soft start though vs instant on with the power supply...

[CR Designs]

Re: sanyo DP32648 tv will not turn on

I dont have a multimeter at home that has diode tests, which would probably be the more important test to run on some of these parts...

But i tested that part and have 24v on pin 1, 12v on pin 2, 0v on the tab and the 3rd pin, and ~ 1.5v on both pins 4 and 5.

Pin 2 is 200 ohms from the 5v rail, and pin 1 is >700 ohms, there must be a cap in the way because the resistance rose as i tested it.

Based on my tests above, and the data sheet on this part, im very confused why they would put a part to convert 24v to 12v, when they already had a 12v rail going to the mainboard >.> , it does allow a soft start though vs instant on with the power supply...

Tested part, I got on pin 1 0.02,on pin 2 0.41, on pin 3 0.00
on pin 4 0.05 on pin 5 0.00 and on tab 0.00. How would you test resistance

[CR Designs]

Re: sanyo DP32648 tv will not turn on

How Would you do diode test? I put my DDM on diode red on pins and black on tab the numbers just rose ever stopping

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

Most Multimeters over 10 dollars have a Diode test, it looks like --|>-- on the dial on the meter ( http://en.wikipedia.org/wiki/Fileiode_symbol.svg ), usually you connect the red probe to the same plug as for voltage readings.

It tells you the voltage drop over a diode. A diode is a simple electronic component that allows energy to go in only 1 direction. All chips / regulators / ic's are made of of transistors and diodes for the most part. Because they only allow energy in 1 direction, you have to test each pair of pins twice, once with red probe on the first pin, and once with red on the 2nd pin. If parts that should only allow power in 1 direction are failed / shorted they allow energy in both directions / or dont allow energy to pass through at all.

[cashkennedy]

Re: sanyo DP32648 tv will not turn on

Did you ever get the new main board in? Any luck fixing the set?

[CR Designs]

Re: sanyo DP32648 tv will not turn on

Did you ever get the new main board in? Any luck fixing the set?

Got the board today. The post office lost it for a week. Put the board in and the tv fired right up !! Been on for about 4 hours now working good. cashkennedy thank you for all your help. Also to the others that chimed in.Still would like to know what was bad on the other board.

[ericc54321]

Re: sanyo DP32648 tv will not turn on

I am having a similar problem. My power supply board has no 5v, 12v, or 24v at the white plug coming out of the board. I bought a board on ebay and now I have 5v and nothing else. I just wanted to confirm that if I jump pson and 5v that I should have voltage at 12v and 24v at the plug because when I jump them together I don't get voltage out of 12v or 24v. I just wonder if the new board is bad also.

[CR Designs]

Re: sanyo DP32648 tv will not turn on

yes when I jumped the 5v to power on I got 12v and 24v. I had to replace main board on mind to get it to work

[ericc54321]

Re: sanyo DP32648 tv will not turn on

Thanks. I guess I bought a bad board.