MPF6908 No 5V on pin 6 to A Board

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

Is this the one you mean Sir?

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

4.80K Ohms one way ad open the other other way, if we are talking about this chip, Is this a digital Mosfet?

[budm]

Re: MPF6908 No 5V on pin 6 to A Board

It is just a diode for the negative power supply section. So it is OK.
You should try new startup/running cap I mention in the earlier post next.

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

will do, Thank you

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

replaced C117 cap today, still same erradic reading on all pins of IC101, thinking bad IC101? won't start? what do you think next step is. Thank you

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

stay with me budm, need your help brother. thank you.

[tw2005]

Re: MPF6908 No 5V on pin 6 to A Board

Fa5528.
You need to check the resistance between GND pin 4 against all other pins to see what you get and report the reading.
Then you will take the DCV reding between GND Ppin 4 and the VCC pin 6 to see what you get.
the IC needs VCC 15VDC typ Voltage for it to start (range is 13.2~16.8VDC).

Too low to start, see post 44.

That means it is trying to run, so it can be due to bad start up cap, or there is problem in the secondary side so it is in start/stop mode. I would verify that the rectifier in the secondary side are good, you also try putting in new start up/running cap.

In the datasheet I see it says recommended Vcc is 10V min, Typ 18V, max 28V

Is this TV being tested with the Sc and SS boards connected? either of those shorted can may present a No LED, No blink. Might be worth checking just in case


I'm not sure if this info applies to US models, you don't have green LED on start up, just red.

[LITEZONER]

Re: MPF6908 No 5V on pin 6 to A Board

Testing bare board, no standby 5V at pin 6

[tw2005]

Re: MPF6908 No 5V on pin 6 to A Board

Testing bare board, no standby 5V at pin 6

Ok, No worries I had to ask just in case.

[richie83]

Re: MPF6908 No 5V on pin 6 to A Board

I am having the same problem with my power board there is no dc volts at c102. i get 5 v and it fluctuates but when i remove the ic101 the voltage slowly increases

[Kamranali]

Re: MPF6908 No 5V on pin 6 to A Board

Hi can i get help to fix my panasonic p50x30k
My tv dont have power and light
And no standby volt also
When i press relay oo2 then i have 5v standby

[dick_barton]

Re: MPF6908 No 5V on pin 6 to A Board

Can you start a new post with model number, pictures of you circuit boards and voltages at the connectors.

[Kamranali]

Re: MPF6908 No 5V on pin 6 to A Board

Thanks Willing
I m new here not so familiar with this website to start new post