power fault main relay clicking on & off no dc on outputs / have disconnected protection,fault still occurs. stop voltage from ic 950 pulsing .if standby board disconnected voltages ok - stop voltage ...
/www.kallhovde.com/pioneer/tricomp/Audio/VSX/VSX-515_RRV3092.pdf Page 66and 67 have a timing sequences for power up and down. Pages 72 and 73 describe a possible loops - DC abnormality and Fan Stopped
...power and make a buzzing noise. 'Buzzing' is not a good thing; it implies that filtration of the DC used by the output section is not as it should be. Power supplies that are mildly overloaded can ...
...out, and force to "0" the pin 139 voltage of the CPU ("PRD" pin, dedicated to detect any abnormal DC voltage from output transistors) This is the reason why the protection circuit shuts-off the
...think thats it. The best way to check the amp IC's is to have the unit powered on and check for any DC offset. You can do that by checking the big 5 watt ceramic resistors for any DC voltage. They ...
...pioneer Hi pat,For pioneer Amp error:It means that microprocessor has detected an abnormal DC voltage:Speaker relay will be Off, then flash "AMP_ERR" on display.If the AC plug is pulled off ...
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