Problem my teac unit it protect any time i power up help please

Hi. Unfortunately the protection circuit is saving your speakers from a fault, most likely one side of the amplifier in the unit is defective.

This needs an engineer.

Service manual is here if you need it. TEAC AG H500 Manual AM FM Stereo Receiver HiFi Engine

Hi Patricia,

You may need a professional cleaning of all the switches internally. If you are up to it. Compressed air with an electronic aerosol cleaning solution is the first approach. Over time these parts develop oxidation. The voltage levels are small and the signal cannot be generated.You need to know what too clean, most are visible. You can also look for internal fuse protection. Make sure when the cover is removed to pull the power first. Some higher end Amplifiers provide protection. You will need a digital multi-meter or equivalent to test the fuses.

http://www.teac-audio.eu/downloads/2/2/8/1/9/TEAC_AG-790E_datasheet_EN.pdf

So before doing all of that. There is a reset switch. It is located between the speaker switches on the face of the receiver. At the top and in the middle left center of the display. Not at the speaker buttons on the left.

That function may be tripped. Reset it twice and try testing with different speakers if it fails again. It may trip instantaneously if there are abnormal voltage levels present in the circuit that arouse protection.

I have located and offer you the Manual PDF. Go here first and try the following. On page 8 in the manual. Titled, " Name of each Control" (D). There is a location diagram for you to observe. Please take some time and look this over.


http://www.teac.com/content/downloads/products/746/ag-790_6l_manual.pdf

Finally, if you need someone to talk too. The You Tube Video has an outlet store tied to it that offers live help.

TEAC AG 790A AM FM Stereo Receiver



Good troubleshooters always take a problem apart one step at time. So go for it. I know you can do it. Fare. Well.

I can give you a figure. Here can be seen the tape transport parts location. This probably will help you fix the problem:



If you need to get a global service manual it can be downloaded via this link, but you need to register your free account before:

http://www.hifiengine.com/manuals/teac/a-3440.shtml

Good luck!
gylacz

Teac AG-V3050 and Teac AG-V8050 are very compatiable to help with this question the total watts per channel are 100 watts. Hope this answers or at least helps. Excellent unit, great power to supply great sound for the unit at its time.

The protect message indicates that a problem was detected at the final stage of the amplifier and the unit has been shutdown to prevent further damage.

If the unit continues to flash protect even with the speaker wires disconnected, then the problem is internal to the unit and it will require repair not just a reset. The typical reason for this is shorted output transistors. Expect a repair cost of $25-$45 for parts if it continues with the protect message.

Please keep us posted.

Thanks,
Dan

hit reset button back of receiver

Hi there. I have the same unit. A darn nice piece of hardware. A couple of months back I noticed my cooling fan making noise. A few days ago I got the "PROTECT" message and the unit wouldn't power up. I turned it off for three days and it started playing again. Now I'm pretty sure it went into protect mode because it overheated. I just tried finding a Teac replacement fan and didn't see one on the web. My solution will be to adapt a small computer-type fan onto it to keep things cool. It works too well to let it die! Good Luck, Gborchers. GROGSTER

Since the problem appeared to correct itself on occassion, I would first look for poor solder connections either at the output transistors or at the voltage regulators. Let me know if you need more detail.
Dan

Check the thermal sensor, TH1. This causes the unit to go into protect, it is a common failure part on this model.