Question about Yamaha DSPE390 Amplifier

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Yamaha dsp-/e300 wont switch on

Amp wont switch on was intermitant and only took short time to power up ..but as time has passed unit no longer will fire up no disply or switchon thump.from speakers..have checked power supply it appears all voltages are there ..however dont have a circuit diagram to check against

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Re: 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

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Re: yamaha dsp-/e300 wont switch on

Check your speaker wire and speaker for short circuit.

Posted on Jan 21, 2008

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