Lexmark C750 Service Manual - Page 167
Lexmark C750 Manual
View all Lexmark C750 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 167 highlights
5060-00x Step 7 Action and questions RIP board-measure the voltage at connector J1-2 on the RIP board. See "RIP board" on page 5-14. The voltage measures approximately +5 V dc. Is the voltage correct? Yes Replace the operator panel. See "Operator panel removal" on page 4-46 Go to step 9 No Go to step 8 8 Operator panel cable (operator panel connection)- make sure the operator panel cable is seated correctly in the connector on the operator panel board. Is the cable seated correctly? Seat the cable correctly 9 Operator panel cable-check continuity of the operator panel cable. Is there continuity? Replace the RIP board. See "RIP board removal" on page 4-70 Go to "Operator panel removal" on page 4-46 and replace the operator panel cable Replace the RIP board. See "RIP board removal" on page 4-70 10 RIP board-a poor ground connection between pin 4 on the operator panel board connector can cause this symptom. Check for continuity between Pin J1-4 and ground on the board. See "RIP board" on page 5-14. Is there continuity? Go to step 11 11 Operator panel cable-check continuity of the operator panel cable. Is there continuity? Replace the operator panel. See "Operator panel removal" on page 4-46 Go to step 13 Go to "Operator panel removal" on page 4-46 and replace the operator panel cable Call your next level support Go to step 14 12 Operator panel assembly-does the operator panel display all diamonds, with the power on/status LED on and 5 beeps? Voltage checks at RIP connector J1. See "RIP board" on page 5-14. Check the voltages on RIP connector J1 as shown: Pin J1-1 J1-2 J1-3 J1-4 J1-5 Voltage Voltage (display active-LCD (display static) Test running) +5 V dc +5 V dc +5 V dc Ground +5 V dc Voltage varies 1.0 to 2.0 V dc +5 V dc Voltage varies 1.0 to 2.4 V dc Ground +5 V dc 13 Replace the operator panel. See "Operator panel removal" on page 4-46 Are the voltages correct? 14 Operator panel cable-check continuity of the operator panel cable. Is there continuity? Replace the operator panel. See "Operator panel removal" on page 4-46 Go to "Operator panel removal" on page 4-46 and replace the operator panel cable Diagnostic information 2-133