Lexmark 4227 Service Manual - Page 50
Bidirectional print adjustment, on Printhead-to, platen gap adjustment
UPC - 734646117104
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4227-300 FRU Action 3 Ribbon Motor Disconnect the carrier motor (CN9 and CN15), Paper Feed Motor the paper feed motor (CN10), the ribbon motor Carrier Motor (CN19) and the (4227-300) carrier motor Sub Logic Board cooling fan (CN17) from the main logic board, 4227-300 Carrier and disconnect the power connector CN-1 Motor Cooling from the sub logic board. Turn the power on Fan again. If there is still a power problem, replace the main logic board. If the machine posts a different error, one of these items is shorted and is holding down the +40 V dc line. Reconnect them one at a time, turning the printer on in between each connection. Replace the item that causes the power failure. 4 Printhead Cables Printhead Disconnect the printhead cables from the sub logic board and turn the printer on. If the power LED lights correctly only with the printhead cables disconnected from the sub logic board, there is a short in the printhead or printhead cables. 5 Main Logic Board If all the above items have been examined and there is still a power problem, replace the main logic board. (Retain the old board for reinstallation if the problem is not fixed.) Perform the "Bidirectional print adjustment" on page 4-3 and check the "Printhead-toplaten gap adjustment" on page 4-2. 2-26 Service Manual