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Sansui au-x501 serwice manuals

I bought damaged sansui au-x501.
Power transistors are missing.
Expert said that without serwice manuals he wont be able to repair it.
Please help.

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A sansui tv switches on and off by itself. What could the problem?

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
Desolder out the horizontal output transistor, and now power on the set. If the set now powers ON, replace the horizontal output transistor. It is faulty. [Collector to emitter or collector to base leak]

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Looking for an owner's manual for the Sansui Integrated Amplipier AU-D9.

Hi info851163...
Go to the following website and register to download your Owners/User Manual for your Sansui Intergrated Amplipier AU-D9.
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The protection light on my Sansui AU-G77XII is blinking when I power up. What would cause this.

It could be most anything but the most likely problem is one of the output transistors. They tend to fail most often because they are driven hard and get hot. This is easy enough to check with a DMM. Remove the power. Remove the bottom for access to the transistors. They are on a large heat sink somewhere in the unit. Check all of them for 0 resistance. If you find one or more they will need to be replaced. If they all check good it is something harder to find and you may need a tech to look at it. Either way it should not cost very much to repair.


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This unit is most likely in protect mode. A problem with the last output stage was detected and is preventing the unit from turning on completely. Normally this is a failure of the output transistors in one or more channels. Without testing some of the components inside the unit, I can not say for sure. I would suggest that you bring this unit to a service shop for a detailed repair estimate. Post the results here and we can help you to perform the actual repair. Expect this estimate to cost around $50.


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It is possible, but nlikely that the protection circuit is bad. More common are shorted output transistors or defective driver stage transistors. This should not be a difficult repair for anyone familiar with audio amps. Unsolder/remove Q22 and Q23 and measure the voltages at each of the 3 pads per transistor and post them here.


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