Question about Sansui Audio Players & Recorders

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My sansui z7000x (1985) has started acting eratic. if pluged in it will turn itself on and off. putting a backwards e in the red numeric led. at this time the keypad becomes useless. if turned off with the clock set and turned back on it will stay on channel for maybe 30 minutes then act up again. i wonder if it experienced a power spike? is it fixable?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: TV LED Flashes then TV shuts itself off

capacitor problems in power supply or a regulater isolate the power suppley by disconecting the line output stage/unplug scan coils for example and run a 60w bulb as a dummy load one wire to earth and the other to rail voltage colecter of line output transister if the bulb glows steady the power supplys fine

Posted on Jun 25, 2007

Kazong
  • 152 Answers

SOURCE: assistant

check your sleep timer settings thats the most comman prob

Posted on Dec 18, 2007

  • 4 Answers

SOURCE: TV shuts off

I would suggest that you guys turn the unit off when this happens, unplug the unit for 30 seconds, plug it back in, and see if this helps. If this does not solve your problem, you should call 1-800-448-2244, so a service center in your local area can be found for further assistance.

Posted on Jan 21, 2008

  • 79 Answers

SOURCE: Yamaha R-V905 constantly turns itself off

Two things I think are happening. It is overheating and it has suffered some sort of damage to a component inside. Try to make sure there is ventilation on all sides. Can you remember a time where you did not have adequate ventilation for this device? If so maybe that is what caused the part inside to fail.

Hope this helps

Thanks for reading!

Posted on May 02, 2008

tech48
  • 624 Answers

SOURCE: Shutdown protection? HELP please

All of the Denon recievers I have repaired (over 100) that shut down after a very short time are going into protect mode. The display lights up and after about 10 seconds the display goes out and the standby led blinks red.
I have found that they have one of 3 possible problems and they all require that the reciever be taken apart and fixed at component level. No way to tell what your problem is until it gets put on a bench and troubleshot.

Problem 1. This is the most common problem. One of the front channels shorts out. On the big heat sink the front channels are at each end. It is the front left channel (close to the display) This requires that the output transistors be replaced as well as some driver transistors and some resistors and a capacitor. Lots of work for a blown channel. Denon has put out a bullitin to upgrade the bias transistor and change a couple of resistors to help compensate for this failure. That channel overheats more than any other channel.

Problem 2. There is a resistor that is right next to the preamp board that opens up. It is a 10 ohm 1 watt resistor and when it opens, it causes the unit to go into protect.

Problem 3. The +12 volt regulator fails. It is in the power supply area on a smal heat sink right next to the -12 volt regulator. Generic part number is KIA7812 It also causes the unit to go into protect.

Most decent repair shops can fix these from about $120 up to about $200. Depending on which problem it is and how fast they are at finding the problem. Most charge labor by the hour.

Posted on Jun 18, 2008

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