t4796
Senior Member
Last Activity: 10-30-2024, 07:18 PM
Joined: 02-21-2015
Location: NSW
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Ok mate. Thanks for the reply. Will take some further measurements of the diodes, fet and resistors. That's a good tip about the cap since there is plenty of room and it might be easier to find a single/I might have one already. -
With the circuit acting as a doubler but getting fed 220v instead of 110v the capacitors would have seen over 300volts dc each? I already replaced all diodes since I was already adding two more. I thought they tested ok, but it was late will try to find them. They are 4007 1000v diodes....Leave a comment:
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Fender Mustang non valve guitar amp - owner connected 110v amp to 220v.
Hi all,
I recently picked up this amp as not working. I took it as is. Didn't notice until I got home it had foreign power plug and was marked 110v and our local voltage is 220v so then I knew what had happened to it.
Opened it up and was able to find the schematic online. In the schematic I have uploaded I have erased the parts for 220v operation to make it easier for me to visualise however I have since added the two additional diodes and remove the wire link from the power supply so I can test it easier on 220v
From the FAQ I learnt that for 110v the power... -
Re: Sony KDL-55EX640 (630) DEAD SET
It's 510 = 51 ohms.Leave a comment:
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Re: Sony KDL-55EX640 (630) DEAD SET
I'm pretty sure of the values in my initial post apart from r606. I'll measure across those two parallel resistors/diode. The parallel figure of those two should confirm if it's 51D or 510.Leave a comment:
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Re: Sony KDL-55EX640 (630) DEAD SET
Hi Mate,
Best I can do tonight.
IC601 = ICE2QS03G - Infineon
R605 = 69Y 5.11 ohm
R606 = 51D? 332k ohm?
R618 = 30B 2k ohm...Last edited by t4796; 08-10-2016, 05:48 AM.Leave a comment:
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Re: Help identify fuse
Good question.
There were a lot of blown caps on the power supply board and also two on each inverter board. There could be more problems.
When it got it there was a blink code and it wouldn't start up. It starts up now after recap, with no blink code but was only illuminating one side. I hadn't checked the fuses before, but noticed the slave side fuse was blown.
I should order a few, in case it blows again and I have to replace the IC or the fets or both?
Funny how I never saw that 12A DC65V annotation...Last edited by t4796; 02-02-2016, 07:34 AM.Leave a comment:
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Help identify fuse
I need to replace a fuse on a philips lcd inverter board.
The component in question has KOAC 12A printed on it.
I found KOA Speer - CCF1N12TTE I think this is the correct part that is on the board, but is this really a 12AMP fuse? Such a high current rating?...Last edited by t4796; 02-02-2016, 07:14 AM. -
Re: LG LVDS FFC continuity
I thought that the pins should go straight through to either end of the plug?
I've got ~12v at the fuse. I found one of my Sony lvds cables was the same size and tried it with the same result unfortunately. I think the mainboard is at fault. I seem to read a lot of threads where LG mainboard have gone faulty. Wish I knew what component. Saw some people replace eeproms.Leave a comment:
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Re: LG LVDS FFC continuity
The cable...Leave a comment:
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LG LVDS FFC continuity
I've got an LG LA6230 with back light, audio but no video. I've tried another t-con same result.
Thought I'd check the lvds cable and I find some pins have no continuity. Is this normal?Last edited by t4796; 12-20-2015, 07:00 AM. -
Re: Panasonic Viera TH-P50U30A Plasma Faulty Panel?
I tightened the SC screws but not the SS. Thanks for the heads up, I'll check them out.
I did notice some light damage on the underside near at the screw holes.Leave a comment:
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Re: Panasonic Viera TH-P50U30A Plasma Faulty Panel?
Just following up on this.
Replaced both the SD and SU with boards from the 3D model. The original was AB, the donor was AG.
Whilst it would run with only one board replaced, the other half of the screen had lines missing no matter how well seated the ribbons were.
With both boards replaced and ribbons seated runs fine. Fixed.Last edited by t4796; 11-21-2015, 06:18 PM.Leave a comment:
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Re: TCL LCD TV L32M11HD no standby
Thanks for the reply. I've taken the following measurements:
[COLOR="SeaGreen"]CB4 - 21.14uF on meter I do not have ESR meter[/COLOR]
[COLOR="seagreen"]measures 1.078k (meter - to cathode) and 0.077M (meter + to cathode)[/COLOR]
[COLOR="seagreen"]measures 1M+ (rising on meter) (meter - to cathode), 0.676V in diode check mode and Open (meter + to cathode)
I didn't remove ZB6 to test because it was surface mount. I desoldered pin 5 IC1 which hopefully isolated that...Last edited by t4796; 11-15-2015, 12:42 AM.Leave a comment:
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TCL LCD TV L32M11HD no standby
Hi,
I have a TCL 32" LCD on the bench. No standby 3.3v
I do not have stable voltage on pin4 Vdd of IC1 VIPER12A (with respect to AGND)
Schematic is attached, pictures of standby section now attached....Last edited by t4796; 11-14-2015, 11:12 PM. -
Re: Panasonic Viera TH-P50U30A Plasma Faulty Panel?
Only the SU board seems to be shorted on the output side.
SD board doesn't seem to have any shorts. I'll have to do some more tests though.Leave a comment:
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Re: Panasonic Viera TH-P50U30A Plasma Faulty Panel?
Thanks for the reply.
I will persist, and try to learn some more.
I see SJ has no stock of these older SU/SD boards, I found a pair of them from china. Is there anywhere else reputable. They are 5336AB, 5337AB.
If the blinking stops when I jumper the connector and remove those boards, do you think the SC board is safe to connect to new buffers?
I've seen some boards with heatsinks on them. I wonder if they would be any more robust than these ones, which seem prone to failure.Last edited by t4796; 06-14-2015, 06:57 AM.Leave a comment:
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Panasonic Viera TH-P50U30A Plasma Faulty Panel?
I took a look at this plasma, it was flashing 7 blinks.
I disconnected the SU/SD boards from the SC and connected the appropriate jumper. It powered up with no blinks and I could hear audio/adjust volume etc when I connected an input source.
I powered it up with the gnd screws in place only and the jumper (and the ribbons to the panel) Anyway the screen lit up with the attached image. Can somebody in the know tell me if this means the panel is physically damaged?
It doesn't look like the photos I see on google images, but I'm prepared for the worst... ... -
Re: Sony KDL-55EX640 (630) DEAD SET
S101 in1m101-t6g st9s101-t6g.Leave a comment:
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Re: Sony KDL-55EX640 (630) DEAD SET
i got my hands on another power supply dps-195ap-1.
surprise, there actually WERE two zener diodes in parallel in the original damaged location on my board.
i'll desolder them soon and see what values they are.Leave a comment:
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