Re: Sanyo FW55D25F stuck in color test mode
Just my 2 cents.
Disconnect cable (LDVS) between the main board and the panel with integrated T con.
Jumper power from the power board to the smd fuse on the panel. You may need a ground path also. Turn set on.
If your still in test mode, You have a panel problem
Tvbob
tvbob
Last Activity: 03-01-2024, 12:05 AM
Joined: 12-11-2009
Location: manchester oh
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Last edited by Tvbob; 04-14-2019, 10:32 PM. -
Re: Old plasma help.
Try heating up Y and Z sus, Power and Logic boards one at a time with a heat gun (not a paint striper) or use a hair dryerLeave a comment:
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Re: Please help identify burned components on a samsung pn50a550 Y-SUS board
It is when you get my age...good luckLeave a comment:
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Re: Please help identify burned components on a samsung pn50a550 Y-SUS board
Buy a Ysus board and check your buffer boards.
When they sizzle like that, it created a lot of voltage spikes.
That may have damaged the driver circuitry.Leave a comment:
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Re: What's the purpose of these thermo pads?
There used to help damped noise, humming.
You should be able to reuse them.
They are not necessary.Leave a comment:
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Re: LG 60ps60
I used a can of freeze spray (I don't think they make it any more) after I heated up the logic board with a heat gun. One drop of the boiling freon on the big 330uf@16 v caused many more lines.. Checked the cap in circuit with a meter = 68 mfd
I already had a logic board on the way only $29.00 ebay so I never jumped in any caps. I did not want to stress my Y sus board any more.
I have since changed the logic board and the set is Fixed!
The before mentioned 2.2 ohm resistor and associated mosfets run cool now.
Thank you agian Unspun01 for...Last edited by Tvbob; 04-03-2019, 09:53 AM.Leave a comment:
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Re: e701i-a3 no picture but backlights
HI all..Looks like you are reducing panel's (native) refresh rate buy 50% when you remove the driver boards. But you are save them from the land fill for nowLeave a comment:
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Re: LG 60ps60
Thanks unspun01 I made the same mistake on the gold multiplier on resistor also The original resistor is a 2.2 ohm 1/2 or 1 watt..red,red,gold,gold.
The reason the bad angle on my pictures. The TV is hung from the floor joists in my laundry room, too cold in garage.
I have made progress, The Lines that I can't get clear pictures of go away after a 10 second blast of hot air from a heat gun on the logic board I suspect one of the smd electrolytic caps
I ordered a logic board today.
I hope it takes care of my over heating resistor also....Leave a comment:
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Re: LG 60ps60
OK, I decided to jumper in a parallel 2 ohm 5 watt resistor across the resistor that gets hot and opens on the Ysus board so I can leave it on longer to make more checks.
What I have found, One side of resistor is connected to VS (193.8V) on the other side (load) I have ( 193.7V) That Must supply the two 2SK3453 Toshiba MOSFETS that get warm faster than the other power FETS ,ect. on the board.All voltages good. VS 194,VA 67, -vy 178,vsc 140, z bias 104
I have Random vertical lines and stationary horizontal bands in the picture for the first 90 seconds...Leave a comment:
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Re: LG 60ps60
Fell fellow Enthusiasts..
I replaced the Z sus today And still have the same prolbem with the 2,2 ohm 1 watt resistor on the Ysus getting real hot real quick, (It will open in minutes if left on) I still have a normal picture with random vertical lines across the screen.
I have been threw 4 or 5 Y sus boards and 3 complete sets of Y buffer boards. This is the problem the Tv had when I bought it. There were no attempts to repair before me.
Can a plasma panel fail in this way?
Or should I try a logic board?Leave a comment:
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Re: LG 60ps60
answer...Leave a comment:
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Re: LG 60ps60
Ordered a Z sus Today.
Question Why does the Zsus need input from the logic board if the is only 1 electrode connection to the panel, maybe power modulation?Leave a comment:
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Re: LG 60ps60
Yes they are..sorry.
I was using my phone And using text to email them to myself.
I imagine they got resized on the way to the email server.
I cannot find software for my digital camera to install on this pc.(still looking)
My phone has 10 mega pixel, used a usb cable to copy these photos off the phone
Also the resistor that I have made mention of has opened while taking these pics also
I now have 2 Ysus and upper and lower buffer board (sets) With the same symptom (resistor opening)
All voltages are the Good and spot...Leave a comment:
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Re: LG 60ps60
The TV's that I mentioned in post #23 are different modelsLeave a comment:
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Re: LG 60ps60
Sorry for the confusion.. The replacement boards display a picture that look exactly like the pictures in my first post in this thread
I took quick pics with my phone today because I did not want to leave the tv on too long.
That resistor gets too hot too quick.
It appears that this Ysus board buffer "set" Works like the Y sus board and buffers that I took out Today.
The 3rd pic in this post shows the lines the best...Leave a comment:
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Re: LG 60ps60
Curiosity got the best of me..
I odered another Y sus and upper and lower Y buffer boards..
Resistor that Unspun01 pointed out (Thanks Again Unspun01) gets Hot with in 30 seconds.. Maybe Try a Z buffer? Or is this a BAD Panel?
All voltages are Good including Z bias...Leave a comment:
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Re: LG 60ps60
Where to go from here..
This tv is one of 3, 60" lg plasma tv that I have bought broken off Craigslist recently
I am a retired Tv repair man and this is now a Hobby. Have a garage and a detached garage full of tvs. My trash man hates me.
Back to this set .
I found an upper buffer and a Ysus from the same seller on ebay $180.00
If I bought them and installed with out my lower buffer and that resistor pops
it would be the Zsus ??? LOLLeave a comment:
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Re: LG 60ps60
In my correspondence with the repair company previously mentioned.
They knew the board numbers before I sent them. Only after they received them I was told they could not service them, Because they could not jig them.
I assume they have some common plasma panels at there shop.
Attached are the buffer pic's (The lower buffer with the silicone everywhere was not me) Thanks...Leave a comment:
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Re: LG 60ps60
I made all my checks in circuit using my wavetek DM25xt,
I also disconnected the VA cable to the X buffers resistor still gets hot.
The company Is coppell tv repair.In All fairness They Did send me a paypal invoice for return shipping to get my boards back.
(here are the pic's with hot resistor)
Buffers for this set are on the endangered species list...Should I try and turn set on with NO buffers connected to see if resistor get hot?
I have did the static check for shorts using my DVM many times. There are more...Leave a comment:
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Re: LG 60ps60
I changed the .22 ohm 1watt (i think) resistor that was open on the Ysus.
I also checked the components that unspub01 suggested along with the other power semiconductors on the Zsus No dead shorts.
The new resistor over heats immediately and still shows a picture with some vertical lines. Also tried Removing one of the buffers (upper or lower) still overheats
Unpluged power cable to Zsus There is no picture but do have raster, and resistor still overheats.
I sent my old Ysus boards to a repair shop in Texas. They do a lot of plasma board...Leave a comment:
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