Working from a technician aspect, we go into a set expecting the worst and come away feeling good that it was something simple. And, you and I have probably seen them all. We are totally aware of the fact that there is a multitude of things that could shut down a television set. Having a diagram is not a bad issue when the person has the verve to work on the unit.
Next would be a quadrupler module.Ĭhances are this is a simple fix. If the customer has the set disassembled and is looking into the circuitry, deal with the obvious. Thus a good volt-ohmmeter will be a necessary part of the trouble shooting.īad advice. Diodes are unique that they will only pass current in one direction. Diodes are the least expensive component in the set (next to a resistor). The cost of parts are minimal if it is a diode.
P42h401 hitachi check fuse serial#
I suggest you contact Union Electronics on the web, give them your model and serial number, and I would bet they can find the necessary documentation. Things are like the old days when you could depend on power supplies to be grouped in one section. Therefore, I recommend that you get a schematic on the unit so that you can identify the areas of concern. I will make the assumption that you are somewhat literate in the electronic business. Regular diodes are not difficult to identify because they are usually black and have the familiar sausage shaped body. Sometimes it is a litle difficult to identify the diode in question because they often house a complete bridge rectifier circuit (four diodes) in a single housing. The "click" you are hearing is a circuit breaker circuit and I doubt you will find a fuse to change.
I seriously doubt that you are going to get away from this one with just a change of fuse. Both of these are prone to sudden failures and both will give the same indication.Įither way, the back has to come off the set. Second check would be the quadrupler module in the high voltage. The sudden loss of the set gives me cause to believe that a diode shorted in the power supply. If the set has been off for a couple of hours, it will be gone anyway. The high voltage is gone in that instant.
P42h401 hitachi check fuse driver#
Ground a long screw driver with a wire to chassis ground, slip the screw driver up under the "cup" of the high voltage lead on the picture tube, and you will hear a "SNAP". Something has shorted in the set and the internal circuit breaker is kicking in to prevent you from trying to actuate the set any further.ĭischarging the high voltage is not big job.