The fuse located under the power cord plug is blown. I replaced it, and it immediately blew again. Inside, there are 3 switches which I wonder if they are in the correct positions. They are set to 2, 1, 2. Any ideas on what my problem could be?
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Re: Fuse at power cord blows
First check your speaker cabels for short circuit and speaker for short coil .after you confirm there is no shotr of cabel wires by checking with avometer in ohm postion.connect speaker if the problem excit your speaker is guilty - change it with same configuration.about switches put it in low order and chech for sound level and you can go up after that.
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You have a short somewhere in the system. Maybe one of the lock actuators or a switch. To test disconnect all locks and switch then replace fuse if don't blow start with driver door and reconnect lock check fuse see if it blew if not reconnect switch active lock check fuse see if ok. Continue with each door separate using same steps until fuse no good you will have found short. Replace shorted part.
The outlet that the unit plugs
into... Is it 'hot'? Plug in a known working Table
Lamp. If you have power, the problem is the unit.
Where the cord goes into the unit, locate the Power
Supply. Carefully check for any cracked, blackened,
or broken components. My educated guess is that
a small fuse blew, as did the Metal Oxide Varristor,
which is either a large blue or red disc shaped component
near the power transformer. If the fuse is blown black
inside the glass, this indicates a short, and would require
an Ohm Meter to locate it. If the fuse is blown so that
the element inside just melted open inside the glass,
this indicates an overloaded condition, and would require
that the fuse be replaced with a rating 1/4 amp greater
than the original fuse. Why? because most fuses are
under rated to insure that they will need service to keep
people like me from starving! Trust me on this one.
Replace the fuse only once. If it blows right away, then servicing is required as continued replacement will likely damage more inside.
Most of thes have a fuse holder that is a part of the input power socket. There is a little rectangular panel adjacent where the cord connects with a tab that you gently pry out and carries a small fuse. Replace the fuse and re-install the carrier.
These units are very hard to work on due to packaging.
This is a problem with the main poiwer supply. It could be simply a shorted rectifier diode or more complex. Without taking measurements inside the set or at least seeing what the condition is of the board, there is little we can do to help. This unit shoul dbe brought to a service shop with a request for a detailed estimate. Armed with that info, we should be able to guide you through the actual repair. Expect to pay $50 or more for the estimate.
I have worked on several of this model for power surge damage. Usually what I find is a blown fuse, a shorted regulator i.c. and possibly a blown bridge rectifier(diode array). On rare occasions you can solve this problem by replacing only the fuse, but if the fuse blows when you plug the set in, you will more than likely find above mentioned parts have failed. The best thing to do is to call a repairman but if you have an ohm meter you can test it yourself:1.Unplug set and remove rear cover.2.Get spotlight and look closely at where power cord connects to circuit board.Small glass fuse will appear black if open usually.Otherwise,test for continuity, or just replace it.3.After replacing fuse plug power cord back in while looking at fuse.If you see an instant flash, fuse blew again meaning you will need to obtain parts in power supply and solder work will be required. That is probably as far as I can take this other than saying that you might first want to look at underside of circuit board to determine if major surge damage has occurred. If it has you will immediately know because it will have burn marks all around a/c power supply. I hope this helps, Russmann.
A blown fuse is usually caused by a shorted regulator or a bridge rectifier circuit. Either way it is a problem in the primary power supply.
A bad cord won't blow the fuse in the set, it will blow a circuit breaker in the house.
A servicer usually would normally cover the inside of the set with a "few light slits in the AC cord".
Hope this helps
a fuse is a small glass tube about 3/4" to 1". it is located near the end of the power cord inside the tv. it is located in the power board supply circuit.
there are several reason why fuse blew up.
1. sudden surge current/voltage in your area
2. shorted in either power supply or horizontal deflection circuits.
when replacing fuse, be sure to change it with the same value. but if after replacement has been done and the fuse blew again, there is a short in the circuit as stated in reason no. 2.
refer to a qualified service technician if you are not inclined with this job. good luck!