569HC1220A TV Power Supply, All Voltages Except 32V

[RukyCon]

Hello again, I'm trying to fix this TV power supply board that came from a Dynex TV (Model DX-L26-10A)
The rail tests at roughly .4v, and i've tried testing all of the other secondary side components and they all seem to check out fine, so i'm not sure what else to test and how to test it.

Any help would be appreciated.

[stj]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

follow the tracks - you will see the diode on the heatsink has broken solder joints.
probably not the only ones.

[budm]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

Hello again, I'm trying to fix this TV power supply board that came from a Dynex TV (Model DX-L26-10A)
The rail tests at roughly .4v, and i've tried testing all of the other secondary side components and they all seem to check out fine, so i'm not sure what else to test and how to test it.

Any help would be appreciated.

What is the 'rail test'?
Can we see better pictures around the connectors? I cannot clearly see the pin labels.

[RukyCon]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

What is the 'rail test'?
Can we see better pictures around the connectors? I cannot clearly see the pin labels.

I meant to say the voltage at the 32V pin of the connector tests at .4v

follow the tracks - you will see the diode on the heatsink has broken solder joints.
probably not the only ones.

I cannot find this broken solder joint you speak of, and the diode for the 32v rail is not attached to a heatsink, though i was thinking about bypassing/replacing the diode to see if that does anything.

One other thing to note is that it appears that the 32V supply is independent of the rest of the supply using an A6159M as the main switching IC.

[budm]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

https://www.shopjimmy.com/dynex-6kt0...pply-unit.htm#
It looks like the 32V power supply section is not stuffed, it is supposed to be generated by the sane power transformer T502 which is also for 12V and 24V.
You can see that the rectifier D522, C558, C567, N514 are not stuff.
R579 (220K) is connected between GND and pin 8 (32V) of the connector X503.

Pictures provided by shopjimmy.

[RukyCon]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

It shows exactly 220.5K ohms.

[budm]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

It shows exactly 220.5K ohms.

Read my edited post 5.

[RukyCon]

Re: 569HC1220A TV Power Supply, All Voltages Except 32V

https://www.shopjimmy.com/dynex-6kt0...pply-unit.htm#
It looks like the 32V power supply section is not stuffed, it is supposed to be generated by the sane power transformer T502 which is also for 12V and 24V.
You can see that the rectifier D522, C558, C567, N514 are not stuff.
R579 (220K) is connected between GND and pin 8 (32V) of the connector X503.

Pictures provided by shopjimmy.

Well frick, i guess i've learned nothing from years of trying to do this stuff.

thanks for helping and sorry for wasting your time with my stupid question i should have been able to answer myself.