Lexmark C720 Service Manual - Page 4
Toner Empty Sensor P.W.B. Board Service Check, Service Manual - error codes
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5024-001 Control System Structure 1-42 Electrical System and Function 1-42 Control of Print Process 1-43 Print Sequence Diagram 1-44 Laser Drive Control Circuit 1-45 Interface Control 1-47 Lower Feed Unit Theory of Operation 1-48 Duplex Theory of Operation 1-49 Diagnostic Information 2-1 Start 2-1 Service Error Codes 2-2 Operator Messages 2-9 Paper Jam Messages 2-27 Symptom Tables 2-32 Printer Symptom Table 2-32 Print Quality Symptom Table 2-34 Optional Lower Feed Unit Symptom Table 2-36 Optional Duplex Unit Symptom Table 2-37 Printer Service Checks 2-38 901-Yellow Developer Clutch Service Check 2-38 902-Magenta Developer Clutch Service Check 2-39 903-Cyan Developer Clutch Service Check 2-40 904-Black Developer Clutch Service Check 2-41 905-Yellow/Black Developer Solenoid Service Check 2-42 906-Magenta/Cyan Developer Solenoid Service Check . . . . .2-43 907-Toner Empty Sensor P.W.B. Board Service Check . . . . .2-44 910-Developer Motor (DM) Drive Service Check 2-45 911-Main Motor (MM) Service Check 2-47 915-Control Cooling Fan Service Check 2-50 916-Ozone Fan Service Check 2-51 917-Fuser Heater Fan Service Check 2-52 918-Erase Lamp Service Check 2-53 920, 922, 923-Fuser Unit Service Check 2-54 921-Fuser Thermistor Service Check 2-55 981-Duplex Motor (DPM1, DPM2) Service Check 2-56 982-Duplex Upper Solenoid (DSOL-U) Service Check . . . . . .2-58 983- Duplex Fan (D-FAN) Service Check 2-59 984-Duplex Lower Solenoid (DSOL-L) Service Check . . . . . .2-60 990-Transfer Drum Encoder Sensor (HPSEN) Service Check 2-61 991-Transfer Roller Cam Clutch (TRCM) Service Check . . . .2-63 992-Drum Cleaner Brush Cam Clutch (FBCM) Service Check 2-64 iv Service Manual