Re: KPS305D Bench Power Supply
Hi Guys, trouble shooting is going on in slow motion. I found shortage on smd capacitor c44 and pin 4 and 5 of LM358, Remove the capacitor and checked it but it was not short. Removed LM358 and it seems ok outside the board but still there is short between pad 4 and 5. Is it normal ? please advice...
abbas101
Member
Last Activity: 02-21-2023, 10:28 AM
Joined: 02-07-2011
Location: Karachi
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Re: KPS305D Bench Power Supply
R_J I will check and will post results tomorrow. I did the checking last time and AC circuit was ok (at least seems ok)Leave a comment:
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Re: KPS305D Bench Power Supply
Thanks SAM
I checked diodes and all seems ok. I also have doubt on TNY277 but before replacing want to be 100% sure.Leave a comment:
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KPS305D Bench Power Supply
When Turns on Its shows approx 4volt and goes to zero. No Current and No voltage at output. Uses TNY277GN My question if any one knows the voltage between drain and source pins, Currently it is like going into loop from 0 to 330Volts. Thanks -
Re: Schematic for DELL Optiplex 755
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Re: Iphone 6 Dead - Diagnosis
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[attach]222154[/attach]Re: Iphone 6 Dead - Diagnosis
[attach]222153[/attach]
[attach]222154[/attach]...Leave a comment:
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Iphone 6 Dead - Diagnosis
Dear All
My iphone 6 is dead and not charging. I never diagnose mobile phones in my life before but would like to do this time and therefore need help. At initial I found this
1. Battery is OK
2. Using USB power meter I found that mobile is drawing .5 amp and then went to zero and repeat this pattern. at battery terminal there is no short.
What should be my next step? -
Re: Sony klv 32u300a display problem
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Re: Sony klv 32u300a display problem
Thanks for diagram but It does not have any information on blink codesLeave a comment:
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Re: Sony klv 32u300a display problem
Hello everybody
Set was running fine until it develops new fault. Now it is going into standby mode after giving two red blinks. Can anybody help me to get blink code reference with respect to KLV-32U300A. Do sony use same blink codes for all its lcd models?Leave a comment:
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Re: Sony klv 32u300a display problem
Everything is fine so far except one problem.
It is not showing any video on HDMI. It switches normally to hdmi mode on selection but screen remains blank. I have connected many hdmi device and cables but no success.
I also reset tv by pressing up arrow on remote and power button on lcd panel.
Any valuable suggestions!!Leave a comment:
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Re: KDL-37XBR6 has no picture but has sound
Welcome
be careful, before buying from these Chinese suppliers, please do lot of chat and exchange pics of products and model number and make 100% sure that both of you are talking about same product.Leave a comment:
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Re: KDL-37XBR6 has no picture but has sound
One similar to yours is there
[url]http://www.aliexpress.com/item/Free-Shipping-For-Logic-board-T-CON-T370HW02-V5-CTRL-BD-07A63-1CT-CON/508998251.html[/url]Re: KDL-37XBR6 has no picture but ha...251.html[/url]Leave a comment:
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Re: KDL-37XBR6 has no picture but has sound
not necessary, yours is T370HW02 V05Leave a comment:
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Re: KDL-37XBR6 has no picture but has sound
Search on GOOGLE for "T370HW02" and you may found many sellers on ebay and other online shopsLeave a comment:
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Re: KDL-37XBR6 has no picture but has sound
I have highlighted it for you. It is near connector...Last edited by abbas101; 06-18-2013, 12:35 PM.Leave a comment:
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Re: Sony klv 32u300a display problem
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Thanks to everybody.
Problem is solved.
Culprit was RJ58. I show the technician and he made a wire jumper to replace it. All the tubes are now evenly brightened.
Tom, Thanks to you for suggesting not to buy tubes in post no. 18, although I was feeling lucky when I negotiated and was about to buy FULL BACKLIGHT for just US$30 from scrap.
Retiredcaps, Thankyou for informing me that those tiny devices are only jumpers. I think It is easiest...Leave a comment:
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Re: Sony klv 32u300a display problem
Thanks for explanation. It means it should show continuity and give beep on multimeter?Leave a comment:
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Re: Sony klv 32u300a display problem
Please advice what these RJ?? components are with "0" printed on top, are these resistors with 0 value and acting as jumpers?
There are lot of these on inverter board and all showing continuity except RJ58
Any advice?...Leave a comment:
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