Lexmark C750 Service Manual - Page 176

5060-00x Step 8 Action and questions Perform a continuity check on the developer HVPS cable. Is there continuity? Yes Replace in order: 1. Developer HVPS board. See "Developer HVPS board removal" on page 4-28. 2. Engine board. See "Engine board removal" on page 4-29. No Replace the developer HVPS cable. Black and white only-cyan, magenta, and yellow are missing Step 1 Action and questions Check the Print Mode setting in the Color Menu. Is the Print Mode set to Black&White? 2 Ask the user or network administrator to check if the correct color driver is installed. Is the correct color driver installed Yes Change the setting to Color. Install the correct color driver. No Go to step 2 Go to "Black only retract (BOR) service check" on page 2-117. Light print over the entire page • If all colors have light print, go to "All colors have light print over the entire page" on page 2-142. • If only one color has light print, go to "One color has light print over the entire page" on page 2-143. All colors have light print over the entire page Step 1 Action and questions Replace the second transfer roll. See "Second transfer roll removal" on page 4-79. Does the light print persist? 2 Turn the printer off. Check the cable connections between the transfer HVPS board and the system board. Check continuity on the cable between the rear second transfer roll arm and the 1 lead on the transfer HVPS board. Go to step 3 Problem resolved Yes Go to step 2 No Problem resolved 3 Replace the "Transfer HVPS board removal" on page 4-80. Check the connection at the second transfer roll arm. 2-142 Service Manual