Members iRobot Posted February 6, 2009 Members Share Posted February 6, 2009 Regarding a problem with this unit: PA Driver IC's (UPC2581V-S) - All pin voltages are normal except for pin1 at about 3VDC (normally about 0V) and pins 4 and 10 at -54 volts, the exact opposite of what the print shows as +54V. These voltages are on all four drivers. The unit works just fine, but all the UPC2581's run extremly hot. Thanks for any help. Link to comment Share on other sites More sharing options...
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