We have been using this VP6320 in our conference room for a while, so the lamp probably has a good number of hours on it. Recently, the output light level will go dim and then brighten a few time when it is just starting up. I am wondering if this is an indicator that the lamp is going bad.
This is caused by a faile color wheel sensor. This is like a strobe signal and the projector controls the lamp with this signal. When the sensor failed, you get random noise and the lamp control circuitary is going crazy. This is a known problem with the VP63XX series of projectors. I am factory trained and I can fix the problem for you. If you are very good with electronics, I can sell you the repair parts plus instruction.
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Do you have a dimmer for interior lamps? Like a rheostat, a little wheel that you turn up or down to brighten or dim interior lamps. Usually the instrument cluster lamps brighten and dim the same way.
Can you brighten and dim the other interior lamps?
Is your clock part of radio assembly? There is usually a dimmer control for interior lamps, you rotate it to brighten or dim interior lamps--dome--instrument cluster--radio illumination. The same thing should work for the clock. If clock is part of radio assembly, I guess you can remove radio and dig into it, see if you find the wiring for clock illumination.
Hi, Inverter is inside the LCD Screen. Mostly at the bottom in the middle. To locate the Invertor, you have to take apart the LCD Screen by removing the LCD Frame, removing rubber pads & screws (depending upon the Model of notebook you have). Moreover, the cause of dim/ dark display could be the faulty lamp. So, I recommend that you check both the Inverter and Lamp. Another likely cause is a bad connection of power from motherboard to the LCD. So first check the connectors/ wires for any damage before proceeding to replace Inverter of lamp. For your convenience and idea about LCD Display, I have found a general link about CCFL replacement. Click here for detailed and graphical DIY instructions about LCD disassembly. Make sure you take proper precaution while working inside LCD, as the inverter generates a very high voltage.
Hope it helps! Good Luck! Thanks for using Fixya! CreativeTECH
This is caused by either a poor ground connection to the head lights or an overcharging condition taking place in the voltage regulator of the alternator, the spikes in output voltage causes the head lights to brighten up.
A few things are going on - one or more could be the cause - but in most cases, a slight reduction in lamp brightness is nothing to be worried about, especially if it brightens again.
If you're removing your foot from the gas to go to the brakes, the engine RPM is falling - reducing the amount power from the alternator to supply the vehicle with electricity. Since your alternator puts out 13.8 volts and your battery supplies 12 volts, the vehicle power could be reduced by as much as 15%. Normally, the alternator output won't drop that low - but under certain conditions it might. One such common condition would be a loose V belt or serpentine belt. You'd probably hear it squeal when it was getting loose (have you checked it and your battery connections lately??). Switch on the fan to high speed and the air conditioning on - these devices draw a large amount of power to run, and while at idle or if a belt is slipping, the lights will probably dim a bit. You'll probably not notice anything if the engine RPM is in the 1500 and up range. All pretty normal expectations.
See if you can duplicate the situation on an empty stretch of road or parking lot. Watch the car's Voltage meter. If it dips when the lights do, it's probably a system wide voltage drop and if only barely noticeable - probably not worth worrying about. If the volt meter stays solid - but the lamps dim, it could be a loose connection - somewhere. This, is a much harder problem to find.
Since you're not losing engine power and you didn't say that the dim lights stay that way, you probably have little to worry about. Of course, having a mechanic check it out may give you peace of mind in exchange for a few bucks.
I answered this question many times. This is caused by a failed color wheel sensor. It faile gradually, first the lamp flickers, sometimes go dim for no good reason. Finally the lamp will not strike and you will get two red warning lights. I am factory trained and I stock the redesigned senor.