Re: Panasonic TH-42PZ70BA 7 blink code

An update. Lifted a leg off each FET and it confirmed the faulty one was Q645 (as in post 9) above. Is it necessary to lift a leg off the FETs? I originally placed the negative lead on the S and postive lead marked G on the board. Removing the faulty FET took a lot of heat using a gas soldering iron directly as a mini blow torch. Also soldering the new FET was difficult due to the solder drying up quickly on the base of the FET....but eventually managed it! TV is now back up and running!!! Thanks guys.

In future any tips regarding...

Re: Panasonic TH-42PZ70BA 7 blink code

Yes. Moved the SC20 connector away with needle nosed pliers. Powered TV up. Fans working and LED remained on green light..no blinking reds! It's just the AV unit in the way of the SD connectors. I hoping it's not too much hassle removing the AV unit..will consult the engineers manual.

Re: Panasonic TH-42PZ70BA 7 blink code

Screws off, 2 white connectors off by prising towards you. Now tried prising the SC board from the buffer boards but not enough room due to the silver cylindrical rollers which take the wall bracket screws inhibiting further movement. Just need to get the 4 black connectors on SC board to come away from the buffers. Any tips before I start removing the AV and the SU and SD boards!

Re: Panasonic TH-42PZ70BA 7 blink code

Thanks for your advice Flocko! Here goes...fingers crossed!

Re: Panasonic TH-42PZ70BA 7 blink code

Thanks for your reply! Tried pulling out SC20 connector, not budging! I'm afraid that I will snap something. To remove the SC board do I have to remove SU and SD boards completely together with the flexible cables on the side? That's what it says in the manual. To remove the SD board do I have to remove the AV unit which lies above it? Also when checking the FETs (once SC board removed) by "lifting one leg" does this involve desoldering one leg on each of 14 FETs to check for shorts.

Re: Panasonic TH-42PZ70BA 7 blink code

Hi, I'm new to all this so any help would be appreciated please. I've got an 8yr old TH-42PZ70BA. It was repaired under warranty in it's 1st year due to the 7 blinks. Same problem again. Is it the 5N2307 fet? I used a digital meter and got the following readings:

Q641- 215
Q642- 222
Q643- 215
Q644- 208
Q645- 150
Q646- 215

Q695- 1058
Q696- 1047

Q648- 823
Q649- 818
Q651- 812
Q652- 819
Q653- 817
Q654- 829

I'm suspecting Q645 is...