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Sony amp TA-V5 Death

I can't switch on amp. Switch is O.K., Hi-DC voltages on power supply O.K. Low voltage missing. Can me anybody help, missing me schematic diagram. Thanks Viktor The same problem-last point with 300V is that capacitor. Then current should come into switching power supply. There is also relay which is not turning on (described 24VDC). I think that there is missing Remote signal. Any ideas?

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Posted on Jan 02, 2017

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Looks like the new part number is DE91-10368A and it's available for $90.25 from

If you'd like the board repaired, we do that for $39.95 in most cases.

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Posted on Nov 17, 2007

  • 236 Answers

SOURCE: yamaha dsp-/e300 wont switch on

no display at all in your front panel?

you said power supply is ok... all voltages...
i remember DSPE300, small power amp only IC. can you check your +/- main power supply if ok it should be around +/- 35V. If it's there then place your meter neg to speaker ground, the + to red and try to run on the unit. see if you'lll get a pulse in AC meter mode. Or a DC voltage in DC mode.
then check also your secondary supply that's about +/- 15volts. Your standby voltage for the CPU to work is 5V. please check that as well

If the trouble is main amp, you should still have a display screen. Unless it is a total breakdown and main out totally shorted, it really wont turn on but you said you seem to find voltage.


Posted on Mar 19, 2008

SOURCE: sony TA-F210 amplifier no sound

Check R803 and R804!!! They must be 0.33 Ohms. When they are more check the capacitors.

Posted on Apr 27, 2008

  • 4234 Answers

SOURCE: Proton 1100 Pre-Amplifier not working

The probability of a relay going bad is remote. This relay is part of the protection circuit and will not turn on if there are problems detected. If you can detail the parts that have been replaced, I may e able to determine the reason for the relay failure. Realize that some internal measurements may be required as well.


Posted on Feb 02, 2009

  • 2071 Answers

SOURCE: power supply problem in Behringer pmp 3000 mixer

Just try to resolder all component parts in power supply section,maybe there is a loose connection or cold solder joints that causing of abnormal voltage or missing voltage.Also check the resistor for cange value causing the voltage trap.Check also all electrolytic capacitor for leak. Hope it may help you;;

Posted on Jun 08, 2009

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