Lexmark C750 Service Manual - Page 163

5060-00x Step 4 Action and questions Disconnect J5 from the engine board and check the voltages on connector J5 on the engine board. The voltages measure as follows: Note: All voltages are approximate values. Connector pin Voltage J5-1 J5-3 J5-5 J5-6 J5-8 +24 V dc +5 V dc +5 V dc +5 V dc +5 V dc Yes Go to step 5 No Replace the engine board Are the voltages correct? 5 Autoconnect cables-check the autoconnect from the printer or option above the HCIT 2000-sheet option. Check for any signs of cuts, pinched wiring or damage to the contacts in the connector. Are there any problems with the autoconnect cables? 6 HCIT autoconnect cable-check the HCIT autoconnect cable for correct installation at the HCIT system board. Is the cable installed correctly? 7 HCIT autoconnect cable continuity-check the continuity of the HCIT autoconnect cable(s). Is there continuity? Replace HCIT system board Replace the HCIT autoconnect cable Go to step 7 Install the cable correctly Repair or replace as necessary Go to step 6 Diagnostic information 2-129