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Search: Posts Made By: tom66
Forum: Troubleshooting TVs and Video Sources 05-31-2018, 04:09 AM
Replies: 19
Views: 198
Posted By tom66
Re: I am FRUSTRATING THE P*** out of myself trying to find a replacement MOSFET KF5N5

General rules for MOSFETs.

PACKAGE - must be identical or mechanically compatible. Ensure that metal tab version replaced with metal tab. Ensure that plastic tab version replaced with plastic...
Forum: Troubleshooting TVs and Video Sources 05-27-2018, 10:20 AM
Replies: 8
Views: 127
Posted By tom66
Re: Saving a Sony Bravia KDL-46X3100 (HELP PLEASE)

Dick is right. Bad panel. Maybe repairable with a shim but often temporary fix only. If you were going to keep it for a bedroom or something might be a reasonable thing to do. I would never sell...
Forum: Troubleshooting TVs and Video Sources 05-27-2018, 10:18 AM
Replies: 34
Views: 612
Posted By tom66
Re: Used TV Resales, very slow...

Economics Kevin - if your TVs aren't selling at $200 then you need to lower the price.

Unfortunately there's little market for generic used TVs - it has to be a "feature-packed" model to be...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-24-2018, 01:53 PM
Replies: 13
Views: 400
Posted By tom66
Re: Power supply ripple hall of shame

That ripple is so high and repetitive I'd be tempted to say it was down to oscillation in the controller (caused by bad caps) rather than the caps themselves contributing to it.

My entry. I...
Forum: Troubleshooting TVs and Video Sources 05-22-2018, 12:31 PM
Replies: 2
Views: 89
Posted By tom66
Re: lg 42pq3000 weird bar on picture

Bottom IC or 2nd IC from bottom on buffer board is bad
Forum: Troubleshooting TVs and Video Sources 05-19-2018, 03:50 AM
Replies: 4
Views: 143
Posted By tom66
Re: Short circuit on Y Buffer board, or bad panel ?

If a Y-buffer board fails it will short between VSCH and VFG/VSC on the Y-board.
The VFG is the large "ground plane" on the board BUT it is not the same as ground, it is a floating ground.
VSCH is...
Forum: Troubleshooting TVs and Video Sources 05-11-2018, 02:44 PM
Replies: 1
Views: 112
Posted By tom66
Re: Liability Insurance for TV Repair Techs | Recommendations | Comments

I would have thought general professional indemnity insurance would cover you. Check the restrictions on the policy.
Forum: Troubleshooting TVs and Video Sources 05-07-2018, 02:03 PM
Replies: 5
Views: 110
Posted By tom66
Re: Vizio E420VL One Vertical white line

Unfortunately in any case it is almost certainly a bad panel and not repairable, there is a small chance you could shim it with a "tab bond" fix but the longevity of such a repair is unknown. I...
Forum: Troubleshooting TVs and Video Sources 05-07-2018, 05:39 AM
Replies: 12
Views: 263
Posted By tom66
Re: Yellow discoloration on Panasonic 50" Plasma - VSUS option missing in service m

I've found Ve to have an effect on cyan tinting in white on a Panasonic plasma before - that might be another avenue to explore if this does not permanently resolve the issue.

The only issue with...
Forum: Troubleshooting TVs and Video Sources 05-04-2018, 12:25 PM
Replies: 10
Views: 206
Posted By tom66
Re: Pioneer 1410-HD Plasma Vertical Line Top Right 1/3rd

Definitely a dead panel. You should know better than replacing the buffer board because that deals entirely with rows. There is no failure of the buffer board that could cause this fault. ...
Forum: Troubleshooting TVs and Video Sources 05-03-2018, 10:43 AM
Replies: 14
Views: 332
Posted By tom66
Re: New TVs LED issues

Shameful. Sigh.
Forum: Troubleshooting TVs and Video Sources 05-02-2018, 03:18 AM
Replies: 885
Views: 102,218
Posted By tom66
Re: e701i-a3 no picture but backlights

For anyone wondering the effect in the picture is just MPEG compression artefacts. It is not a fault, just a limitation of the quantisation depth of MPEG.

If you're watching downloaded files, you...
Forum: Troubleshooting TVs and Video Sources 04-21-2018, 02:34 PM
Replies: 4
Views: 177
Posted By tom66
Re: Dead Panasonic TH-85PF12E due to fault in AC DET circuit

Nice - glad you got it working...
I ended up replacing the module on the P board to fix this issue as it came back after a while... Seemed to be triggered by slightly low mains voltage.
Forum: Troubleshooting TVs and Video Sources 04-19-2018, 02:26 PM
Replies: 14
Views: 218
Posted By tom66
Re: LG 60PM6700 no image. Bad EBR73710601 Upper buffer board ?

Nah I wouldn't trust a word that guy says I've heard he doesn't know shit about TVs.
Forum: Troubleshooting TVs and Video Sources 04-19-2018, 10:48 AM
Replies: 14
Views: 218
Posted By tom66
Re: LG 60PM6700 no image. Bad EBR73710601 Upper buffer board ?

You said VSC of 0V with the bad buffer removed, I would recheck, as would expect around 150V. There may be another fault...
Forum: Troubleshooting TVs and Video Sources 04-15-2018, 03:48 PM
Replies: 54
Views: 564
Posted By tom66
Re: Samsung P58C8000 ~ Power Supplies have failed (2)

Vsch is Vsc+150V

so e.g. -200V Vsc gives you -50V Vsch.

It is the HIGH-buffer voltage drive signal.

Your pictures are too blurry to be usable, try daylight without flash.
Forum: Troubleshooting TVs and Video Sources 04-14-2018, 02:08 PM
Replies: 49
Views: 1,011
Posted By tom66
Re: LG 60PZ750 running hot and maldischarged

To be fair I think I remember the same issue on a PS43D450 Samsung I tried fixing...waveform was quite poor due to the transistors being shit. Strange it was intermittent, though.
Forum: Troubleshooting TVs and Video Sources 04-12-2018, 01:03 AM
Replies: 9
Views: 199
Posted By tom66
Re: Bypass disable SOS - Panasonic

SOS6 is generated by the VMID / ER voltage balance.
I would check the VMID voltage on the poly caps in the energy recovery circuit
Follow the schematic and it'll show you where SOS6 is generated...
Forum: Troubleshooting TVs and Video Sources 04-12-2018, 12:10 AM
Replies: 49
Views: 1,011
Posted By tom66
Re: LG 60PZ750 running hot and maldischarged

any update on this? would be interested to see what you discovered.
Forum: Troubleshooting TVs and Video Sources 04-09-2018, 06:44 AM
Replies: 4
Views: 170
Posted By tom66
Re: I think ESD killed my panel.

Cardboard would be worst.

Best thing for ESD is conductive material. The material that you get behind radiators to insulate them - it's got a foil-like appearance - isn't bad
Forum: Troubleshooting TVs and Video Sources 04-08-2018, 02:52 PM
Replies: 49
Views: 1,011
Posted By tom66
Re: LG 60PZ750 running hot and maldischarged

Great.
Zoom a little in on this area...we need to be able to see the cycles more clearly
Then wait for a fault...what do you see? Any obvious change? Could be very minor change.
If it's not so...
Forum: Troubleshooting TVs and Video Sources 04-08-2018, 02:50 PM
Replies: 4
Views: 170
Posted By tom66
Re: I think ESD killed my panel.

Not had it happen, but it's completely believable.
Forum: Troubleshooting TVs and Video Sources 04-06-2018, 01:53 AM
Replies: 54
Views: 564
Posted By tom66
Re: Samsung P58C8000 ~ Power Supplies have failed (2)

It is really really rare that the X- or Y-main will cause the board to fail immediately. They have overcurrent, short circuit and various other types of protection systems that are unlikely to allow...
Forum: Troubleshooting TVs and Video Sources 04-05-2018, 02:31 PM
Replies: 13
Views: 300
Posted By tom66
Re: Buffer board 150Kohm is it good?

The OLED is better if you want to get a TV comparable to the plasma's picture quality.

Personally, I was quite fond of the D550 when I fixed mine, and it can be quite reliable. For 20 euros, I...
Forum: Troubleshooting TVs and Video Sources 04-05-2018, 01:32 PM
Replies: 13
Views: 300
Posted By tom66
Re: Buffer board 150Kohm is it good?

You can check -Vy and Vsc voltages. -Vy is around -200V and Vsc is around 150V.

But, if the voltages were bad, it's very likely your picture would be bad anyway.
So the failure is probably...
Showing results 1 to 25 of 500

 
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