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floydturbo
Joined: 23 Oct 2007 Posts: 1
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Posted: Tue Oct 23, 2007 3:50 pm Post subject: Denon avr-1604 +45volts at all output transistors |
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Unit goes into standby. It appears that all output devices are fine, but 45volts +/- at output due to high voltage at each of the transistors. Why would all they all see such high input voltage to the transistor?? |
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vtech
Joined: 08 May 2006 Posts: 1264 Location: USA
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Posted: Tue Oct 23, 2007 9:20 pm Post subject: |
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When the outputs are infact ok, the plus/minus rails present at the outputs are either the loss of bias control(latched circuitry) OR it may be leakage back through the protection circuitry. Depending on the design/device used, you should at least read a balance of +_ .5 to 1.5 V at the base of txixtors.
Common bias control problem are open (low value) rsistors supplying the said circuitry---unless have experience & can spot check w/out documentation, need to get a schematic. |
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