No Power on Panasonic Plasma

[tw2005]

Re: No Power on Panasonic Plasma

well, might as well try something diferent. I think that standby chip was more of an issue with the 2012 models over a certain batch.

Hook it all up and apply A/c, now not sure if you need to attempt to turn it on but try every thing from at plugin, power switch and remote. on the A board at connector A6A, pin 22 is 5v there?

I'm looking at a s60/st60 flowchart.

[tom66]

Re: No Power on Panasonic Plasma

tw I have a feeling this is a completely different pinout as P board has SS integrated... so are you sure S60 will be compatible?

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

control Voltage across pin 6 off U203 if not control the diode sending this vcc

how do i do that ?

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

what should i do here ??

[tw2005]

Re: No Power on Panasonic Plasma

mainboards look similar so hoping the pinout is too. Can't find a manual. both have the same style connector and 23 pins

1.15Vs(S15V)
2.15Vc(P15V)
3.F_STBY(F15V)
4.F_STBY(F15V)
5.GND
6.F_STBY_ON
7.GND
8.SOS4 (GND)
9.STBY5V_SW
10.S0
11.KEY POWER
12.S1
13.KEYSCAN
14.Panel_Main_On
15.GND
16.GND
17UML
18.GND
19.UMH
20.UEH
21.SOS8
22.STB5V
23.P5V

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

mainboards look similar so hoping the pinout is too. Can't find a manual. both have the same style connector and 23 pins

1.15Vs(S15V)
2.15Vc(P15V)
3.F_STBY(F15V)
4.F_STBY(F15V)
5.GND
6.F_STBY_ON
7.GND
8.SOS4 (GND)
9.STBY5V_SW
10.S0
11.KEY POWER
12.S1
13.KEYSCAN
14.Panel_Main_On
15.GND
16.GND
17UML
18.GND
19.UMH
20.UEH
21.SOS8
22.STB5V
23.P5V

here is what i tested.

[tom66]

Re: No Power on Panasonic Plasma

mainboards look similar so hoping the pinout is too. Can't find a manual. both have the same style connector and 23 pins

Oh wow you're right.. the S60 does have SS on power board. Did not realise that at all. Interesting.

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

well, might as well try something diferent. I think that standby chip was more of an issue with the 2012 models over a certain batch.

Hook it all up and apply A/c, now not sure if you need to attempt to turn it on but try every thing from at plugin, power switch and remote. on the A board at connector A6A, pin 22 is 5v there?

I'm looking at a s60/st60 flowchart.

yes the 5v is there . what now ?

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

anyone have any ideas what i can try ?

[tom66]

Re: No Power on Panasonic Plasma

If PSU is producing 5V but the TV still seems dead where do you think the fault is? What controls the power led? If unsure trace the wires to it.

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

i was thinking of mainboard but didnt want to put it forward incase it sounded daft ? would i be correct of faulty mainboard ?..would make sense since the guy i got it from said it happened when he plugged in a tablet...

[tw2005]

Re: No Power on Panasonic Plasma

I'd be thinking mainboard but with a tablet if it was plugged into the TV I'm also thinking the current draw would be too high and maybe blew a fuse or something. weird how both tablet and tv died

again this is from the s60 chart.

Place the meter’s positive lead on pin 6
of connector A6 on the A board and
press the power switch on the TV.

Is there
1.5V~3V
present?

no = main

yes = PSS

I've never seen these sets so best I can do is quote the guide.

[tom66]

Re: No Power on Panasonic Plasma

i was thinking of mainboard but didnt want to put it forward incase it sounded daft ? would i be correct of faulty mainboard ?..would make sense since the guy i got it from said it happened when he plugged in a tablet...

Don't be afraid...
If you said you thought it was tab bonds, or the backlight inverter, I'd say you were daft
But suggesting main board is completely reasonable in this case.

[vinceroger69]

Re: No Power on Panasonic Plasma

slightly of topic but what is the correct way to add a hdmi device to a tv ie power on hdmi device and the power on tv? or the other way around? i got asked this question earlier i wasnt sure so many conflicting stories.

[tom66]

Re: No Power on Panasonic Plasma

slightly of topic but what is the correct way to add a hdmi device to a tv ie power on hdmi device and the power on tv? or the other way around? i got asked this question earlier i wasnt sure so many conflicting stories.

No correct way. Both should be completely tolerated by well designed HDMI devices. The HDMI TMDS pairs (the delicate, high speed interface that is most likely to be damaged) are both off when the cable is not connected and before "handshaking".

When the cable is connected, the HOTPLUG line is pulled low by the TV, the source (DVD/Bluray/satellite/etc) notices this and reads the TVs EDID data (about 2KB of data), determines which modes the TV and itself can support (lowest common denominator) and switches to that mode. This activates the TMDS pairs.

If the cable is disconnected from the TV, the source stops transmitting shortly afterwards.

ESD protection on the HDMI ports is typically human body model 15kV rated which suffice to say is extremely tolerant. Some cheaper devices omit such protection but it is very cheap nowadays to add so most companies do it to avoid warranty claims.

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

I'd be thinking mainboard but with a tablet if it was plugged into the TV I'm also thinking the current draw would be too high and maybe blew a fuse or something. weird how both tablet and tv died

again this is from the s60 chart.

Place the meter's positive lead on pin 6
of connector A6 on the A board and
press the power switch on the TV.

Is there
1.5V~3V
present?

no = main

yes = PSS

I've never seen these sets so best I can do is quote the guide.

Don't be afraid...
If you said you thought it was tab bonds, or the backlight inverter, I'd say you were daft
But suggesting main board is completely reasonable in this case.

i will test that out tw and thanks for the input Tom

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

ok should have checked before but must be the mainboard as there was this burn mark behind HDMI 2 connection.. so i will order one and replace and hopefully it works but will update.

[tw2005]

Re: No Power on Panasonic Plasma

ok should have checked before but must be the mainboard as there was this burn mark behind HDMI 2 connection.. so i will order one and replace and hopefully it works but will update.

Ah, ok. that explains the tablet dying. i thought it was via USB. May be able to fault find it and remove the short and this work but may have only 1 hdmi or none.

I've never done it but pretty sure someone has . Of course a main may be easy and cheap.

[vinceroger69]

Re: No Power on Panasonic Plasma

No correct way. Both should be completely tolerated by well designed HDMI devices. The HDMI TMDS pairs (the delicate, high speed interface that is most likely to be damaged) are both off when the cable is not connected and before "handshaking".

When the cable is connected, the HOTPLUG line is pulled low by the TV, the source (DVD/Bluray/satellite/etc) notices this and reads the TVs EDID data (about 2KB of data), determines which modes the TV and itself can support (lowest common denominator) and switches to that mode. This activates the TMDS pairs.

If the cable is disconnected from the TV, the source stops transmitting shortly afterwards.

ESD protection on the HDMI ports is typically human body model 15kV rated which suffice to say is extremely tolerant. Some cheaper devices omit such protection but it is very cheap nowadays to add so most companies do it to avoid warranty claims.

Thanks tom some good information as always.

[Mikeyboy2007]

Re: No Power on Panasonic Plasma

tw i had a look on ebay and can get main for just less than £10 which is a good buy if itl sort out the tv. will give it a try with another board and update you guys, thanks