Re: Panasonic TH-42PZ85E --> Completely dead!
When i ground the cable to the speaker housing the picture on scope is the same
When i ground the cable to the speaker housing the picture on scope is the same
-
I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Needs to be grounded to the chassis.... Fan mounts work well I've foundPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
So what do you think of the pictures?I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
If you see that, you haven't got a good ground.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
The 3rd picture is the default setting when scope is on. LAst pic is when i put the probe to pin 11/12/13I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Your right, pin 11/13 the line is horizontal but 1 square higher.
On pin 12 its default horizontal lineI only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Is it on 5V/div or 1V/div?
For 1V/div you may need to move the trace down a little using the V POS control.
You should now check AC DET signal, MC501.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Its on 5v/div. I took a picture of the setting so you can see by yourself.
First picture of the scope setting is on 1V/div
Then you asked me to change it to 5 and thats the last picture. The horizontal line is going 1 square upwards. ( Means 5v right? )
How do i test AC DET signal? Where do i put the probe?I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Again 2 pictures.
First is pin 12
Second is pin 11/13
If i change the time/div it just slows down the signal ( visually).
Vpos is set to the middle.Attached FilesI only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
-
Re: Panasonic TH-42PZ85E --> Completely dead!
AC_DET is on pin 16 of MC501... look at the schematic...Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
I searched for ac det but i did not find it sorry.
With pin 16 i get this on the scopeAttached FilesI only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Ok, this means the AC detection is working... So... this is where I draw a blank. Did you try bridging MC552 standby switch?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Ok thats good. Not yet , was thinking i did it all wrong but I'm glad i did it right
Does it matter if its pin 11 or 13?I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Btw , scope is a good way to measure! I'm really surprised!! What do you see at the last picture? Its starting at 5v dropping to 0v?
So if I'm correct its just a way to measure if the DC line is working throughout the PS?I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Ill start with Pin 11 , standby on.I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Pin 11 bridged to P25/Pin 9 did not do anything.
Pin 13 bridged to P25/pin 9 does not turn on the TV but there is something happening.
I used the multimeter to test the 5V STB on diode. ( Pins were connected the whole time ).
I bridged pin 13 to pin 9 and the 5V dropped to 0.8v and i hear something ticking real soft , sounds like a old clock that you wind up. ( tickticktickticktick ).
No power/clicks/led!I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Sounds almost like the 5VSB may be shorted on the main board... That would be odd...
Maybe try powering 5VSB from a lab power supply separately?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
5v STB on P25/Pin9 or Pin12 on MC501 or directly on main board? So your now thinking power supply is ok?I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
I don't know, I'm just brainstorming right now.
Try keeping power board disconnected, just feed in 5V, and set a 1 amp current limit.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Panasonic TH-42PZ85E --> Completely dead!
Ok will do that tomorrow.
Thx , and if you have any idea's let me know!I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!Comment
-
Hi everyone!
Three years ago I got a ZD-915 desoldering station which failed just after a few months of light use. During a short desoldering session, the station simply shut down, and since then it has been completely dead and unresponsive. The failure was silent, without any pops.
Due to a lack of time, I set it aside and didn't look at it.
Yesterday, I took it apart and did some basic measurements. The 18v terminal shows 0v. In addition, there is no visible damage to the board itself.
According to replies in 18VDC PSU has dropped to... -
Hello!
I received a fantastic T490s that is completely dead, after i removed the back cover i noticed a totally fried cap (attachement) pic, i remove it and cleaned the pcb, seems undamaged, although the nearby caps are shorted, PU1001 looks physically undamaged.
Any advice please?
Thank you in advance!
Scehmatics, boardview and damage picture in attachement.... -
Hi.
I have a Sony KD-55X8507C on the mending table today.
It appears completely dead, no status LED's lighting up. Even though it's acting completely dead, the power supply is running and the heatsinks on the main ASIC's do heat up, so it's just not starting properly.
This thread has been a lot of help since someone posted an excerpt from a schematic that contains the correct LED driver chip. without that pinout, anyone's guess
The power supply has two boost converters, each run 5 strings of LED's. All LED strings i tested to have a Vf of... -
Hello!
Today i received a T480s that is completely dead, the MB is quite sophisticated from what i'm used to repair (4th and 5th gen) so i need your help before i touch anything.
No liquid damage, no visual damage at all.
All caps in red square are shorted to GND, not sure what and if means something.
I'm all ears
Thank you in advance!
Link to schematic - https://www.badcaps.net/forum/showthread.php?t=81061
.... -
Hi everyone I have a plasma here that is absolutely dead no power light. When I press the power button the relays click the fan spins for a second then it's dead and nothing happens on the screen. Anyone have any suggestions?
Comment