Lexmark C750 Service Manual - Page 155

5060-00x Step 7 Action and questions Check the voltages on the bottom options cable connector. The voltages are with the printer in standby mode. 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 8 No Replace the bottom options cable in the printer Are the voltages correct? 8 Make sure the upper options cable in the duplex option is installed correctly in the duplex frame. Is the cable installed correctly? Go to step 9 Correctly install the cable. If the connector is damaged, replace the cable assembly. Install the cable correctly 9 Make sure the upper options cable in the duplex option is connected correctly to J11 on the duplex options board. Is the cable connected correctly? Go to step 10 10 Check continuity of the upper duplex options cable. Is there continuity? Replace the duplex options board. Install the cable correctly. Top margin on duplexed copy set incorrectly Go to "Quick Test" on page 3-23 to adjust the top margin on the back of the duplex page. Diagnostic information 2-121