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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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Sony Bravia TV...What should I do??
Hi, my husband wall mounted our sony bravia and in doing so had to cut
the power lead to enable him to chase it into the wall. He added an inline connector to the main power cable but when he went to turn it on i think it blew the fuse in the TV, is that easy to fix or will it have to be done by a proffesional? Also what sort of conector should we use to ensure it doesnt happen again? Any advice would be appreciated. |
#2
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Sony Bravia TV...What should I do??
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#3
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Sony Bravia TV...What should I do??
It's not immediately clear how miswiring the power cord could damage the
set. There is no "polarity", per se, to AC, nor is there any way one might connect the wires to increase the voltage (that I'm aware of). |
#4
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Sony Bravia TV...What should I do??
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#5
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Sony Bravia TV...What should I do??
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#6
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Sony Bravia TV...What should I do??
William Sommerwerck wrote:
It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. Do we know which country the OP is in? Ron |
#7
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Sony Bravia TV...What should I do??
"Ron" wrote in message
news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? |
#8
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Sony Bravia TV...What should I do??
William Sommerwerck wrote:
"Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? It wouldn,t, but not everyone is in the USA and some sets in Europe are earthed (grounded) |
#9
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Sony Bravia TV...What should I do??
Samuel M. Goldwasser wrote:
"William Sommerwerck" writes: "Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? In the USA it shouldn't do any damage or result in a safety hazard with modern equipment. And unless you checked the wiring of the outlet, probably wouldn't even know. If he connected Hot to Earth Ground, it would trip a breaker or GFCI, or blow a fuse. If live was connected to the sets ground, then any gounded metalwork in the set would be live, although it would almost certainly double insulated. It would probably at least blow the sets mains fuse, or more likely the psu IMO Ron |
#10
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Sony Bravia TV...What should I do??
"William Sommerwerck" writes:
"Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? In the USA it shouldn't do any damage or result in a safety hazard with modern equipment. And unless you checked the wiring of the outlet, probably wouldn't even know. If he connected Hot to Earth Ground, it would trip a breaker or GFCI, or blow a fuse. -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#11
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Sony Bravia TV...What should I do??
msg wrote:
William Sommerwerck wrote: "Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? Everyone responding seems to assume that the power cord is AC mains; some sets (such as my Polaroid LCD2000) use a power brick and a DC cable to the set; the O.P. may have miswired that cable after cutting it if the set is DC powered. That`s easily done, even for those in the know. Ron(UK) |
#12
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Sony Bravia TV...What should I do??
William Sommerwerck wrote:
"Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? Everyone responding seems to assume that the power cord is AC mains; some sets (such as my Polaroid LCD2000) use a power brick and a DC cable to the set; the O.P. may have miswired that cable after cutting it if the set is DC powered. Michael |
#13
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Sony Bravia TV...What should I do??
Ron wrote: William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. Do we know which country the OP is in? The OP posted through Google Groups with an IP address of 90.204.168.58 which resolves to the UK, but does it matter? The TV has to meet safety standards which will not let a TV have a hot chassis. No current production TV is going to have a hot chassis unless some moron wires the line directly to the safety ground. That would trip a breaker, or more likely in the UK, blow a fuse in their ring circuit. Learn to do a Whois instead of asking where someone is posting from. Look at the full header for the IP address. I use the free tools on http://www,dnsstuff.com. Be warned that if you try to abuse them, your IP address will be blocked. -- http://improve-usenet.org/index.html Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm |
#14
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Sony Bravia TV...What should I do??
Ron writes:
Samuel M. Goldwasser wrote: "William Sommerwerck" writes: "Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? In the USA it shouldn't do any damage or result in a safety hazard with modern equipment. And unless you checked the wiring of the outlet, probably wouldn't even know. If he connected Hot to Earth Ground, it would trip a breaker or GFCI, or blow a fuse. If live was connected to the sets ground, then any gounded metalwork in the set would be live, although it would almost certainly double insulated. It would probably at least blow the sets mains fuse, or more likely the psu What's inside the set shouldn't care. It should blow the fuse or pop the breaker or GFCI upstream. -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#15
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Sony Bravia TV...What should I do??
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#16
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Sony Bravia TV...What should I do??
On Tue, 17 Mar 2009 12:21:07 -0600, msg wrote:
:William Sommerwerck wrote: : : "Ron" wrote in message : news : :William Sommerwerck wrote: : : :It's not immediately clear how miswiring the power cord could damage the :set. :There is no "polarity", per se, to AC, : : :There is 'polarity' if it has an earth wire and the op connected mains :live to the sets ground. : : : My point was that it's not like reversing + and -. Why would reversing hot : and neutral damage anything? : : : :Everyone responding seems to assume that the power cord is AC mains; some sets such as my Polaroid LCD2000) use a power brick and a DC cable to the set; the :O.P. may have miswired that cable after cutting it if the set is DC powered. : :Michael I don't know of any Sony Bravia LCD TV which is powered by anything but ac mains power. My Bravia certainly is. |
#17
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Sony Bravia TV...What should I do??
On 18 mar, 02:27, Ross Herbert wrote:
On Tue, 17 Mar 2009 06:44:42 -0700 (PDT), wrote: :On 17 mar, 02:42, Ross Herbert wrote: : : What he did was highly illegal. : :really? if it's his own house, how so? Most civilised countries have legally enforcible laws requiring that electrical wiring be performed according to specified standards, and usually, alterations must be carried out by a qualified electrician - even in your own house. Since the OP is in the UK, this is particularly so. In the Uk it is not 'highly illegal' to modify a mains lead on a Tv set! stupid in this case, yes, but not illegal! |
#18
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Sony Bravia TV...What should I do??
"Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. Do we know which country the OP is in? Ron UK by the looks of it. I don't know of any Sony TV sets which have a mains earth connection, and even if they did, wrong connection is unlikely to blow any internal fuses or do other internal damage. As far as I know, Sonys use a 'conventional' SMPS, and these care not a jot which way round the mains is connected, or even if it has a 'live' and 'neutral' at all, as in they work just the same when they are on a fully floating transformer safety-isolated bench supply. The failure of the set to work now is, in my opinion, either as a result of the connector being wrongly wired mechanically, resulting in a blown plugtop fuse (we have small cartridge fuses in the power plug in the UK), or just good old Murphy's Law coincidental bad luck. Bear in mind that if the set has run for months never going off any further than into standby, then coming back on from a full power off condition, is the most common time for a switcher to fail ... Arfa |
#19
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Sony Bravia TV...What should I do??
"msg" wrote in message ernet... William Sommerwerck wrote: "Ron" wrote in message news William Sommerwerck wrote: It's not immediately clear how miswiring the power cord could damage the set. There is no "polarity", per se, to AC, There is 'polarity' if it has an earth wire and the op connected mains live to the sets ground. My point was that it's not like reversing + and -. Why would reversing hot and neutral damage anything? Everyone responding seems to assume that the power cord is AC mains; some sets (such as my Polaroid LCD2000) use a power brick and a DC cable to the set; the O.P. may have miswired that cable after cutting it if the set is DC powered. Michael That's a very good point. Sometimes, the marking of the two wires in the figure 8 DC cable, is not especially clear, and may not be at all, to someone who is not experienced in knowing what to look for. That being the case, he may well have reconnected the wires backwards. Hopefully, the set wouldn't care and just sit there inert, but it may also employ a shunt protection diode, which may fail itself, or knock out a fuse. The brick would of course be a switcher itself, so a reverse connection to the set on its output, may just result in the PSU going into an excess current shutdown condition. Arfa |
#20
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Sony Bravia TV...What should I do??
If he connected Hot to Earth Ground, it would trip
a breaker or GFCI, or blow a fuse. Precisely. The set wouldn't be damaged. |
#21
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Sony Bravia TV...What should I do??
On Tue, 17 Mar 2009 18:45:55 -0700 (PDT), b wrote:
:On 18 mar, 02:27, Ross Herbert wrote: : On Tue, 17 Mar 2009 06:44:42 -0700 (PDT), wrote: : : :On 17 mar, 02:42, Ross Herbert wrote: : : : : What he did was highly illegal. : : : :really? if it's his own house, how so? : : Most civilised countries have legally enforcible laws requiring that electrical : wiring be performed according to specified standards, and usually, alterations : must be carried out by a qualified electrician - even in your own house. : : Since the OP is in the UK, this is particularly so. : :In the Uk it is not 'highly illegal' to modify a mains lead on a Tv :set! stupid in this case, yes, but not illegal! Modifying the appliance lead may not be illegal, but "chasing" it into a wall and then connecting it to the mains supply via an "in-line joiner" is. The appliance must be connected to the mains via an approved outlet which is accessible so that the appliance can be unplugged. I doubt that an in-line joiner (was this also chased into the wall?) which, from the OP's description, would not be easily accessible or would not allow the appliance to be unplugged. |
#22
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Sony Bravia TV...What should I do??
"b" wrote in message ... On 18 mar, 02:27, Ross Herbert wrote: On Tue, 17 Mar 2009 06:44:42 -0700 (PDT), wrote: :On 17 mar, 02:42, Ross Herbert wrote: : : What he did was highly illegal. : :really? if it's his own house, how so? Most civilised countries have legally enforcible laws requiring that electrical wiring be performed according to specified standards, and usually, alterations must be carried out by a qualified electrician - even in your own house. Since the OP is in the UK, this is particularly so. In the Uk it is not 'highly illegal' to modify a mains lead on a Tv set! stupid in this case, yes, but not illegal! Here in the USA it is illegal to run any appliance's power cord inside or through a wall. (National Electric Code) No matter what country you're in, the correct way to install your TV on the wall without the mains cable visible is to install a new outlet behind the TV. Depending on your local and national electric codes this connection should be made using Romex (Solid conductors covered by PVC sleeve) or BX (Armored cable). In some cases it is safe to tap into the nearest power outlet for this connection, but there are a lot of variables including how many outlets/fixtures are on the same circuit, how much amperage is being drawn on that circuit, etc. For example, you do not want your TV plugged into the same circuit as a refrigerator, air condtioner or other items that cause a large power drop when they start up. If the TV has a standard removable power cord, replace it with a new cord and test the TV by plugging it directly into a wall outlet. If it works then you have probably not done any damage to the TV. If it doesn't work you should take it to a repair shop and have it repaired. Next, HAVE AN ELECTRICIAN INSTALL THE OUTLET BEHIND THE TV FOR YOU. It may seem expensive at first, but a qualified electrician won't burn down your house, destroying your property and perhaps killing you and your family. |
#23
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Sony Bravia TV...What should I do??
"Mike S" nospam wrote in message ... "b" wrote in message ... On 18 mar, 02:27, Ross Herbert wrote: On Tue, 17 Mar 2009 06:44:42 -0700 (PDT), wrote: :On 17 mar, 02:42, Ross Herbert wrote: : : What he did was highly illegal. : :really? if it's his own house, how so? Most civilised countries have legally enforcible laws requiring that electrical wiring be performed according to specified standards, and usually, alterations must be carried out by a qualified electrician - even in your own house. Since the OP is in the UK, this is particularly so. In the Uk it is not 'highly illegal' to modify a mains lead on a Tv set! stupid in this case, yes, but not illegal! Here in the USA it is illegal to run any appliance's power cord inside or through a wall. (National Electric Code) No matter what country you're in, the correct way to install your TV on the wall without the mains cable visible is to install a new outlet behind the TV. Depending on your local and national electric codes this connection should be made using Romex (Solid conductors covered by PVC sleeve) or BX (Armored cable). In some cases it is safe to tap into the nearest power outlet for this connection, but there are a lot of variables including how many outlets/fixtures are on the same circuit, how much amperage is being drawn on that circuit, etc. For example, you do not want your TV plugged into the same circuit as a refrigerator, air condtioner or other items that cause a large power drop when they start up. If the TV has a standard removable power cord, replace it with a new cord and test the TV by plugging it directly into a wall outlet. If it works then you have probably not done any damage to the TV. If it doesn't work you should take it to a repair shop and have it repaired. Next, HAVE AN ELECTRICIAN INSTALL THE OUTLET BEHIND THE TV FOR YOU. It may seem expensive at first, but a qualified electrician won't burn down your house, destroying your property and perhaps killing you and your family. Interesting thread. When I bought a dishwasher I tried to get an electrician to connect it. He wanted to tap into an existing outlet on the backsplash behind the sink. I told him to **** off, added a run of BX to the breaker box and added a new breaker dedicated to the dishwasher. Doing it myself might not have been legal, but it was a hell of a lot safer. |
#24
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Sony Bravia TV...What should I do??
att wrote:
Interesting thread. When I bought a dishwasher I tried to get an electrician to connect it. He wanted to tap into an existing outlet on the backsplash behind the sink. I told him to **** off, added a run of BX to the breaker box and added a new breaker dedicated to the dishwasher. Doing it myself might not have been legal, but it was a hell of a lot safer. I've had the same sorts of experiences with licensed so-called professionals. My 70 year old water main split. I dug the entire 35' from the house back to the...Oh Spit! Someone had planted a tree smack on top of the line! My wife, not believing I'd see the project through quickly enough, called the 'pros'. They came out the next day with a backhoe, intending to trench 'around' the tree...warning me that it would surely not survive the process. According to Code hereabouts, a water main is allowed only one 90 degree joint, where it turns to go under the house. Not only were they going to kill my tree, they planned to go around the tree, putting three more elbows into the system. (The meter was only five feet from the tree.) Fortunately, when they arrived, there was a car parked right in the way. I told them to take their machine away, come back the next day and I'd have the excavation done and ready for new pipe. I excavated the pipe on the far side of the tree, cut it off on both sides and worked the stub out from the house-side. Before the hole could collapse, I threaded a garden hose through it, under the tree. My thought was that I could turn on the hose (my neighbor's) and wash out a larger hole with it. It proved unnecessary. The plumbers arrived and after much head-scratching (and a threat to get sent away again), decided they 'could' get the new copper through that hole--and did. We used the same trick to get under the house foundation and into the basement, turning a $1600 job into a $400 one--and to Code. (I needed their sign-off to do the meter connection--and to mitigate the $1400 water bill I got the next month.) jak |
#25
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Sony Bravia TV...What should I do??
wrote in message ... Hi, my husband wall mounted our sony bravia and in doing so had to cut the power lead to enable him to chase it into the wall. He added an inline connector to the main power cable but when he went to turn it on i think it blew the fuse in the TV, is that easy to fix or will it have to be done by a proffesional? Also what sort of conector should we use to ensure it doesnt happen again? Any advice would be appreciated. watch what these fags do with their Sony ****: http://www.youtube.com/watch?v=-dB_PiK9K5c |
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