Lexmark lexmark J110 Service Manual - Page 81

4085-001 Operator Panel (LCD) Display Service Check Note: Be sure the operator cable is properly installed at the engine board (J4) and at the operator panel. Check the continuity of the cable and replace if necessary. • Operator panel display blank - printer indicator light Off, paper feed motor turns, carrier moves. • Operator panel display blank - printer indicator light On. FRU 1 Engine Board 2 LCD Action Disconnect connector (J4) from the engine board and verify the voltage at approximately +9 V dc at pins 1, 2, 3 and 5. If the voltage is correct, replace the operator panel. If incorrect, replace the engine board. To check LCD, see "LCD Hardware Test" on page 3-22 . Options Service Check DRAM Memory Option(s) This service check is the same as the flash memory option service check. Run the "DRAM Memory Test" on page 3-23 . If the test fails, replace the RIP card. See the "RIP-EMC Shield Assembly/RIP Card Removal" on page 4-24 . Diagnostic Information 2-59