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Search: Posts Made By: dkneyle
Forum: Troubleshooting TVs and Video Sources 12-29-2019, 05:50 PM
Replies: 1
Views: 56
Posted By dkneyle
Re: LG 37LE5510 Sound gross distortion

HDMI port also has same defect. I'm obviously suspecting a mainboard fault, probably bad solder joints, most likely solder balls on main chip/s. I note this mainboard is mentioned in some posts for...
Forum: Troubleshooting TVs and Video Sources 12-28-2019, 10:04 PM
Replies: 1
Views: 56
Posted By dkneyle
LG 37LE5510 Sound gross distortion

The sound output from DTV is white noise crackle with some barely audible audio behind it, which is grossly distorted. Sounds like an old vinyl record being played way too slow (best description I...
Forum: Troubleshooting Audio Equipment 09-11-2019, 06:02 PM
Replies: 129
Views: 17,387
Posted By dkneyle
Re: Yamaha Electric Piano CLP550 no keyboard output

I'm glad to know this thread I kicked off is helping people get their old Yamaha pianos back into service. I personally have moved on, having donated the piano to a group of synth enthusiasts who...
Forum: Troubleshooting TVs and Video Sources 08-20-2019, 10:27 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Anyone coming across this thread and looking for inverter transformer T51.0186.211, I have stripped the good transformers from the inverter board and listed them on that common auction site. A$20...
Forum: Troubleshooting TVs and Video Sources 08-20-2019, 07:05 PM
Replies: 17
Views: 636
Posted By dkneyle
Re: Sharp LC-37B20E need to change channel plan

Yes, probably a mad thought! LOL
Forum: Troubleshooting TVs and Video Sources 08-20-2019, 05:45 PM
Replies: 17
Views: 636
Posted By dkneyle
Re: Sharp LC-37B20E need to change channel plan

It is not an issue with DTV modulation compatibility (we are the same here in Australia as the UK and most of the rest of the world). The issue is our channel plan is unique to Australia. The...
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 11:06 PM
Replies: 17
Views: 636
Posted By dkneyle
Re: Sharp LC-37B20E need to change channel plan

Thanks NOMORESONYS for your research. I just tried the Germany option, but it doesn't resolve the DTV issue. The references in those posts to compatibility with European countries were with regards...
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 06:22 PM
Replies: 17
Views: 636
Posted By dkneyle
Re: Sharp LC-37B20E need to change channel plan

Yes there are Country Codes, but this set only has options for Europe. Obviously it was only intended for sale in that market. I suspect models sold in our region have options for Oceania or Asia.
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 06:03 PM
Replies: 17
Views: 636
Posted By dkneyle
Re: Sharp LC-37B20E need to change channel plan

Also, does anyoner have a ready-reckoner of DTV channel frequencies used in Europe? I went looking on the net and could easily find a table for the UK, let alone for any of the other countries.
...
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 05:58 PM
Replies: 17
Views: 636
Posted By dkneyle
Sharp LC-37B20E need to change channel plan

This TV is a UK model brought into Australia a few years ago. Repaired it by changing out the inverter and now realise it doesn't tune to our Australian DTV frequencies. Owner now tells me he uses...
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 05:44 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Just to bring the thread to a conclusion. Got a new inverter board from China, installed, and panel lights up, working just fine.

I'm starting a new thread. This TV was brought into Australia...
Forum: Troubleshooting TVs and Video Sources 08-19-2019, 05:41 PM
Replies: 70
Views: 19,209
Posted By dkneyle
Re: Hitachi LE55A6R9A - No backlight

How sad. Yep, strip for parts and advertise for sale. You know all boards are in working condition.
Forum: Troubleshooting TVs and Video Sources 08-17-2019, 06:30 PM
Replies: 70
Views: 19,209
Posted By dkneyle
Re: Hitachi LE55A6R9A - No backlight

Sounds very much like an open circuit there somewhere. If you are using your LED tester to inject voltage and the LED string isn't lighting, then it seems there isnt much else it could be???
Forum: Troubleshooting TVs and Video Sources 07-16-2019, 12:29 AM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Looks like I'm going to have to buy a complete inverter board. Type RUNTKA334WJZZ Backlight Inverter VIJ38002.50. I should be able to get one landed in Oz for about A$50, making it a 'just...
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 10:55 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Clever boys you both! Got inverter out without any drama. Ran the ohmmeter over the secondaries of the transformers. Consistent value is about 1.8k. However, T7504 was many Kohms. About 43k...
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 08:57 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Thanks RJ. I see what you mean from the exploded view. And I've also seen that arcing/corrosion before that you mention, on other panels I've stripped down. Will let you know how I go.
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 07:59 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

I'll go carefully and if they don't slide out (as you'd indicated in your post before editing) I won't force the point!
If the board does slide out, I suppose I could check the functionality of the...
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 07:29 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Just a question about removing the inverter board from your experience. Years ago when first getting into this hobby I recall removing an inverter board and ending up with broken ends of CCFL tubes...
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 06:45 PM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

I'm pretty sure this is the situation. I can see the CCFL tubes briefly come on then the TV shuts off. I doubt there is anything wrong with the inverter. I've told the owner it is likely a...
Forum: Troubleshooting TVs and Video Sources 07-15-2019, 05:37 AM
Replies: 18
Views: 466
Posted By dkneyle
Re: Sharp LC-37B20E difficulty accessing service mode

Yes mate, that is what I'm doing. And as I reported in my first post, something a bit different does happen, but it still shuts down just before service menu starts up
Forum: Troubleshooting TVs and Video Sources 07-14-2019, 11:52 PM
Replies: 18
Views: 466
Posted By dkneyle
Sharp LC-37B20E difficulty accessing service mode

I'm getting a blink code which indicates a lamp problem. Following guidance I see on YouTube etc, the suggestion is to re-set the lamp failure counter before going too far further. I use the...
Forum: Troubleshooting TVs and Video Sources 03-03-2019, 04:00 PM
Replies: 2
Views: 215
Posted By dkneyle
Re: Toshiba 37XV500A low backlight intensity

Haven't got the set with me at the moment, so I can't send pictures. I opened it up and was presented with one of the most complex LCDs I've ever seen. Many, many circuit boards.
I can only see...
Forum: Troubleshooting TVs and Video Sources 02-26-2019, 02:25 AM
Replies: 2
Views: 215
Posted By dkneyle
Toshiba 37XV500A low backlight intensity

Have set backlight intensity to 100%. Output intensity of backlight is about 30% would be my guess. Unsure of history of this set. What is likely to be the cause? Worn out CCFL tubes or an...
Forum: Troubleshooting TVs and Video Sources 01-26-2019, 09:11 PM
Replies: 8
Views: 239
Posted By dkneyle
Re: Samsung Plasma PS42C451 no picture, good sound

Before deciding to seek out a replacement mainboard I did what I should have done first. I reseated the video signal cable between the mainboard and the logic board. I also reseated the mainboard...
Forum: Troubleshooting TVs and Video Sources 01-26-2019, 07:58 PM
Replies: 8
Views: 239
Posted By dkneyle
Re: Samsung Plasma PS42C451 no picture, good sound

From what I've been reading, if the test patterns are OK then the Logic Board will also be OK. Leaving the Mainboard I guess?
Showing results 1 to 25 of 341

 
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