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Where can i buy a replacement power pak for repco premium 7ems eliptical cross trainer
Replace a power pak for cross trainer for a repco premuim eliptical cross trainer 7ems need to buy one so were can i get this from do you have access to this information i live in western australia
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The power amp chip has probably blown. It is a TDA2050 cost about $3. They don't even use thermal grease on these to help conduction to heat sink. Make sure you do use thermal grease when replacing. Also be careful of pluggin anything OTHER than headphones in the headphone jack. It can result in blowing the amp chip.
The small Fender products often have a TDA2050 power chip in them. The chip is on a thin aluminum heatsink and is intended for light use. If you try to sound like a bass guitar amp with this, the chip will go into thermal protection mode. Cutting vents will not help very much, and pushing it to these levels will destroy the speaker eventually. If you need more power, buy a bigger amp. This one would be suitable for a 10 foot by 10 foot room.
I don't have a schematic for this unit, however good design would not demand matched transistors.
If a transistor has shorted, USUALLY mating transistors have been damaged. I am not sure how "5" outputs are configured as usually there is symetry and an even number. If the "5" are all on one side and there are mating trnsistors of another number, then likely there is damage to more components and probably back one stage in the drivers or even farther.
Hint: when re-powering this after repair, put a 100 Watt light bulb in series with the power into the unit to act as a limiting fuse that resets without driving heavy current into the unit causing more damage due to failed parts that were not eliminated in the first reapir.
What type of headphone connector do you have? The Yamaha keyboard headphone jack is a 3.5 mm stereo jack (like on a computer headphone jack). So if the headphones have a 1/4" plug, you need a 1/4" to 3.5 mm adapter.
The YPT220 is similar to many of the PSR keyboards and will use the same adapter. MOST, like your YPT220, use an adapter with the center pin positive AND are protected by a series diode in the keyboard such that damage will NOT occur if wrong polarity is used. You should use an adapter that provides 10 to 12 volts with positive on the pin and negative on the shell capable of 1 amp (1000ma).
VERY carefully clean the lens with a QTip and 99% isoprophyl alcohol. Use ONLY 99% and it can be a bit hard to find.
Be careful to NOT snag the QTip cotton on the carriage or parts holding the lens... clean ONLY the lens, very gently. Let dry thouroughly before trying it again.
I suspect one end of the crossfader pot has broken from the element. The fader probably costs less than $5.
You likely will have to remove all the knobs and some screws to seperate the board with the fader from the front panel so you can replace the fader.
VERIFY the pot is bad with an ohmmeter before dis-assembling however.
You MAY be in luck. It looks like the cross fader has a connector which MIGHT allow you to remove it or certainly only a small board for replacement, seeing these take abuse.
It appears that the cross fader is a dual 100K type B taper.
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