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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Insignia NS-PDP42 Repair
Hi all,
I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek |
#2
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Insignia NS-PDP42 Repair
"amdx" wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. |
#3
Posted to sci.electronics.repair
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Insignia NS-PDP42 Repair
On 6/25/2012 4:33 PM, Ian Field wrote:
wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Mikek |
#4
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Insignia NS-PDP42 Repair
"amdx" wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets & pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. |
#5
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Insignia NS-PDP42 Repair
On 6/26/2012 12:01 PM, Ian Field wrote:
"amdx" wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets & pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. If I have to junk this one, I'll get plenty of parts from it first. Probably just remove the pcb's and hold them for parts. Mikek Mikek |
#6
Posted to sci.electronics.repair
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Insignia NS-PDP42 Repair
"amdx" wrote in message ... On 6/26/2012 12:01 PM, Ian Field wrote: "amdx" wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets & pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. If I have to junk this one, I'll get plenty of parts from it first. Probably just remove the pcb's and hold them for parts. Mikek Mikek Exactly what I did with the one I dragged out the bin, it had a few bulged lytics - on more than one board. So far I've used one of the 10uF SMD ceramics in the remote for my HiFi, the weedy lytic on the battery tracks was marginal at best and performance suffered from day 1 - I had to sit there pressing a button till something happened! With the SMD ceramic added it just works with no faffing about. |
#7
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Insignia NS-PDP42 Repair
On Wednesday, June 27, 2012 8:58:05 AM UTC-5, Ian Field wrote:
"amdx" wrote in message ... On 6/26/2012 12:01 PM, Ian Field wrote: "amdx" wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets & pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. If I have to junk this one, I'll get plenty of parts from it first. Probably just remove the pcb's and hold them for parts. Mikek Mikek Exactly what I did with the one I dragged out the bin, it had a few bulged lytics - on more than one board. So far I've used one of the 10uF SMD ceramics in the remote for my HiFi, the weedy lytic on the battery tracks was marginal at best and performance suffered from day 1 - I had to sit there pressing a button till something happened! With the SMD ceramic added it just works with no faffing about. You do enjoy using the vernacular! (This does go across the pond!) |
#8
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Insignia NS-PDP42 Repair
"Bob_Villa" wrote in message ... On Wednesday, June 27, 2012 8:58:05 AM UTC-5, Ian Field wrote: "amdx" wrote in message ... On 6/26/2012 12:01 PM, Ian Field wrote: "amdx" wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets & pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. If I have to junk this one, I'll get plenty of parts from it first. Probably just remove the pcb's and hold them for parts. Mikek Mikek Exactly what I did with the one I dragged out the bin, it had a few bulged lytics - on more than one board. So far I've used one of the 10uF SMD ceramics in the remote for my HiFi, the weedy lytic on the battery tracks was marginal at best and performance suffered from day 1 - I had to sit there pressing a button till something happened! With the SMD ceramic added it just works with no faffing about. You do enjoy using the vernacular! And septics don't?! |
#9
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Insignia NS-PDP42 Repair
On 6/27/2012 11:45 AM, Ian Field wrote:
wrote in message ... On Wednesday, June 27, 2012 8:58:05 AM UTC-5, Ian Field wrote: wrote in message ... On 6/26/2012 12:01 PM, Ian Field wrote: wrote in message ... On 6/25/2012 4:33 PM, Ian Field wrote: wrote in message ... Hi all, I picked up an Insignia NS-PSDP42 TV. Symptom: Push power switch, relay clicks, then 3 seconds later it unclicks. I seem to be missing voltages out of the power supply PCB, from what little info I have gleaned off the net so far. I don't want to buy a new power supply PCB, I'd rather replace defective components. Does anyone have a schematic or experience with this problem. I see a common problem are 4 bad caps, but mine look and test good. Darn it! Thanks, Mikek You didn't say whether you tested ESR or capacitance. Some electrolytics need to be ultra-low ESR types so the reading might look good enough but isn't. In the UK, some consumer equipment parts sellers offer PSU refurb kits (usually mostly the electrolytics known to cause trouble) If you're trading and charging the going rate it worth the price of a refurb kit to reduce the chances of a return. I see that a common repair is replacement of 5 caps in the PS. It also seems that the defective caps are easy to spot because they are bulging out the top. Mine aren't bulging. I'll do a better test of the caps tomorrow. There's a kit. http://www.amazon.com/Repair-Insigni.../dp/B007HDZVSO As I said "I picked it up" literally, I picked it up at the curb, one of my neighbors threw it out. If I can get it working I'll give to my son, he starts college on July 2nd. He'd like a 42" tv. :-) Couple of days ago someone threw a Samsung flatscreen in the binroom at the flats, all the brackets& pedestal were missing so I stripped it to harvest the SMD ceramic chip capacitors, the yield was a bit disapointing but I got 10x largish one's that read over 11uF Everytime I see one of those opened up - I wonder whether the backlight CCFL transformers would be any good for homebrew stun-guns. If I have to junk this one, I'll get plenty of parts from it first. Probably just remove the pcb's and hold them for parts. Mikek Mikek Exactly what I did with the one I dragged out the bin, it had a few bulged lytics - on more than one board. So far I've used one of the10uF SMD ceramics in the remote for my HiFi, the weedy lytic on the battery tracks was marginal at best and performance suffered from day 1 - I had to sit there pressing a button till something happened! With the SMD ceramic added it just works with no faffing about. You do enjoy using the vernacular! And septics don't?! We do, and there was enough context to make it understandable. Mikek |
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