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PCS_ replied to Sony CECH-ZED1U Playstation 3D LED TV - Two Red Flash

in Troubleshooting TVs and Video Sources

03-26-2024, 10:12 PM
Hi guys, has anyone got the resistor values? Or can read them with a multimeter for me? R19 & R20.

included pics of how it was when I received it, second pic pads Disintegrated Think they used a shovel to solder it but I’ve cleaned up as best as I can and temporarily wired eeprom on pigtails but tv no sign of life then noticed id lost a resistor and the other I can’t get a reading

Regards, Rich

2 Photos

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

05-06-2015, 05:34 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

I have also checked the main filter cap and diodes around the HOT and they appear fine.

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

05-06-2015, 05:31 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Hi, sorry for the extremely delayed reply

There's 135v b+

I removed the HOT and connected an incandescent bulb, stayed lit for a few second
There's only two voltages present on the Flyback, they are the b+ in and the 200v pin which reads as 135v.

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-26-2015, 06:50 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

havrnt had time to do any more on the set due to family commitments but I'm going to see about checking voltages tomorrow, thanks for the info much appreciated

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-25-2015, 04:34 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

By cap end I meant not using just wires but possibly meter probes?

500v I don't think I've got anything rated for that!

I wasn't sure about testing big caps with a standard multimeter either as My father had a special high voltage meter that he used regularly for tv work. I do have several PS3 psu' from fattys so maybe there's sometjing in those that I can use, never really had them to bits as I just swap them out if they become faulty...

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-25-2015, 08:37 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

That's a great idea, but what about insulating the wires to the cap or is that not necessary? Also what sort of gauge wire are we talking?

I've got a pack of assorted resistors 1/4 watt carbon film type as that's what I use but I don't think they will handle high voltage will they?

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-25-2015, 04:04 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Thanks for that, very helpful indeed. Its all a learning curve for me. I'm attempting to eliminate all the tests that can be done with the set in a discharged state. I'm not used to working with HV caps that are full of charge yet. I'm fine with discharging the anode.

Any tips or tricks of the trade would be appreciated because I doubt you wait for everything to self discharge before testing resistance. im quite safety conscious....

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 06:38 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Hi Alastair. How would I check that?
I'm trying to work out the best way to discharge the big power caps so I can meter up components. Want to check the HOT to see where things stand there too

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 09:32 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Still doing the same. Can hear high pitched noise and the thump when tube tries to come on

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 08:32 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

I have been thinking about getting a converter like that, great little things

I've just lifted L704. How would I test the driver chip? I'm used to testing components on a smaller scale, ie 5v circuits lol...

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 08:09 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Ok that was definitely a schoolboy error on my part. That diode is fine!

I'll have to see about getting hold of a Philips for test purposes. Would sit nicely on my bench. Just like a big tv for gaming on. I'm the same with modern consoles.

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 07:09 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Oh and I love gaming especially on the retro's

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 07:08 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

It appears d705 is shorted! All the rest show ok

I repair a lot of retro consoles like mega drive, SNES, n64 etc and I'm also now trying to get into repairing Sinclair's

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 06:23 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Right, I've got the set on bench. Checked for continuity from KR, KG and KB to the rest of the pins and none are of low resistance

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 04:31 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

That's absolutely discusting. the only reason I picked this set up is because I read that trinitrons are the best sets image wise for retro computers.

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 04:16 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Now I'm confused. Why have they marked it as a Trinitron if it's not a true Trinitron?

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 03:43 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

It's going on my bench later today so I'll check, thanks for that ...

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-24-2015, 03:41 AM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

I'm going to have to keep my fingers crossed it's not a shorted gun then. I always thought the Sony trinitrons were supposed to be an all round decent set that's what people have been telling me but then none of them have had them on a bench...

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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-23-2015, 05:56 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

So this will give an indication of the troublesome circuit I presume? I need to clear space on my bench for this as its a fairly chunky set, once I do I'll post back my findings from the continuity test.

Is this the point to always start at with CRT's with this problem? Reason I ask Is to understand how you've pointed towards the C board. Sorry for all the questions but Im keen to learn.

Thx

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Last edited by PCS_; 03-23-2015, 06:11 PM.
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PCS_ replied to Sony Trinitron KD-28DL10U red, green, red, green OCP fault

in Troubleshooting TVs and Video Sources

03-23-2015, 05:35 PM
Re: Sony Trinitron KD-28DL10U red, green, red, green OCP fault

Yes I see, TP 4-6 of J701 thanks

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