Xerox 2135N Quick Reference Guide - Page 62
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UPC - 042215474689
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Blank print 1. Do the imaging drum units make good connection to their power terminals? 2. Are the LED heads wiring harnesses undamaged and properly seated? 3. Is +3.8V (red wire) supplied to Pin 3 of each LED head assembly? If yes, replace the LED head assembly. 4. Is +3.8 V supplied to the POWER connector pins 1, 2, 3, 4, 5, 6, 7 and 8 on the junction board or at the 16-pin interconnect near the top cover hinge (under the top shield plate). Inspect the junction board's wiring connectors. If the voltage is not OK, replace the low-voltage power supply. 5. If +32 volts supplied to the POWER connector pins 7, 8, 9 and 10 on the engine controller board? Inspect the wiring harnesses or replace the low-voltage power supply. 6. Is +32V supplied to the HVOLT connector Pin 5 of the engine board. If not, replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 7. Inspect the high-voltage wiring harnesses. 8. Replace the high voltage power supply. Service Guide 49