11. DRUM/CLEANER UNIT
11. 1. Construction
11. 2. Functions
11. 3. Drum Temperature Detection Circuit
11. 4. Image Quality Control
11. 4. 1. General description
11. 4. 2. Principle of sensor
11. 4. 3. Outline of control
11. 4. 4. Construction
11. 5. Disassembly and Replacement
12. DEVELOPER UNIT
12. 1. Construction
12. 2. Functions
12. 3. Developer Unit Drive
12. 4. Motor Drive Circuit
12. 4. 1. Toner motor
12. 4. 2. Developer motor
12. 5. Auto-toner Sensor Circuit
12. 5. 1. General description
12. 5. 2. Operation of auto-toner sensor
12. 6. Disassembly and Replacement
13. TRANSFER/TRANSPORT UNIT
13. 1. General Description
13. 2. Operation
13. 3. Functions
13. 4. Disassembly and Replacement