Th-42px80ba

[sordids999]

Hi guys just got this plasma 10 red flashes

Any ideas

[Alastair E]

Re: Th-42px80ba

Try a search--Its been covered recently.....

[sordids999]

Re: Th-42px80ba

Thanks mate for the reply searched around i cant find much info

[tom66]

Re: Th-42px80ba

Check PSU 15V. Is it good?

[sordids999]

Re: Th-42px80ba

Checked all voltages from the schematic p12 p6 p7 p25 no voltages,all i get is a clicking sound on the psu when its turned on

[flocko]

Re: Th-42px80ba

Have you checked fuses F401+F402 and Q406 for short on the power board

[sordids999]

Re: Th-42px80ba

Fuses seem ok

[tom66]

Re: Th-42px80ba

Try unplugging SC and SS ribbon cables, does blink code change to 6/7/8 blinks?

[sordids999]

Re: Th-42px80ba

disabled both cable ribbons but still getting 10 red blinks

[tom66]

Re: Th-42px80ba

OK ribbons back in what's the voltage you get on connector P6 (power board) pin 7,8,9, multimeter black on chassis ground, red on pin.

[sordids999]

Re: Th-42px80ba

pin 7 2.0 volts
pin 8 0.8 volts
pin 9 0.8 volts

these measurements are when the tv is first turned on but quickly drop to zero after a few minutes

[tom66]

Re: Th-42px80ba

Can you hold the reading on pin 7 as the TV clicks on and off and note any changes in the voltage? Go from unplugged to 10 blink code.

[sordids999]

Re: Th-42px80ba

pin 7 15.35 volts when the TV is first turned on then drops to 2.35 volts after the clicking sound,then keeps dropping until zero volts

[tom66]

Re: Th-42px80ba

OK, now try pin 1 and hold the reading in the same way.

[sordids999]

Re: Th-42px80ba

pin 1 1.0 volt then again it drops to zero

[tom66]

Re: Th-42px80ba

OK, now check pin 11 of P25; the PANEL_MAIN_ON. It should turn HIGH for +15V(S) to turn on, which is pin 1 of P6.

[sordids999]

Re: Th-42px80ba

Pin 11 of P25 nothing

[tom66]

Re: Th-42px80ba

OK, this is looking like a main board fault.
I've got a PZ70BA right now with a similar problem.
Does set have any fans -- if so do they spin at all?

[sordids999]

Re: Th-42px80ba

No fans tom

[sordids999]

Re: Th-42px80ba

Ill try and find a replacement board thanks tom