Poloroid TDA -03211C- - - -Power Board IPOS 150 Ver. 1.8

[cadillacman]

Re: Poloroid TDA -03211C- - - -Power Board IPOS 150 Ver. 1.8

Hey make sure its not workingbut with no backlight. If you use a flashlight you can see if the lcd is working...

the only reason i say that is that i ran into a polaroid recently that had bad ccfls, it would powrer on then appear to lose video.. but was not losing video, was just losing the backlight.

[retiredcaps]

Re: Poloroid TDA -03211C- - - -Power Board IPOS 150 Ver. 1.8

After getting everythig back together, here are the voltages that I have from the pins....just nothing is powering on:

STB= 4.83
5STB= 5.13
5V=5.13
12V=11.78
20V= 23.98v

Also, the filter cap, when the main board and inverter is attached to the power board, it swells to 400V and holds steady on the reading. When I disconnect everything except the power, the filter caps is steady at 167volts.

All your voltages look good. Is the standby light on?

The 400V is due to the Power Factor Correction. I'm not an expert on this and still learning this portion, but I believe 400V DC is a correct reading. 167V DC is right for the big main cap when power is off, but not disconnected from the mains.

[waitery]

Re: Poloroid TDA -03211C- - - -Power Board IPOS 150 Ver. 1.8

I forgot to add, the fuses are good on the power board as well.

[waitery]

Hi all,

I am having a problem with my Poloroid TDA - 03211C with Power Board IPOS 150 Ver. 1.8. I get a red led on the front, but it doesn't power on. Upon taking off the back to get voltages, I noticed that the caps at EC17 and EC 18 were blown. I ordered new caps from Digakey and also order new FET's at Q16 and Q17 and replaced all of them. I replaced the filter cap too with a new high temp Panasonic. After getting everythig back together, here are the voltages that I have from the pins....just nothing is powering on:

STB= 4.83
5STB= 5.13
5V=5.13
12V=11.78
20V= 23.98v

Also, the filter cap, when the main board and inverter is attached to the power board, it swells to 400V and holds steady on the reading. When I disconnect everything except the power, the filter caps is steady at 167volts. I have attached some pics. Any ideas or questions to help me along would be welcome!!