Brother MFC-J6510DW Service Manual page 57

Error Code 20
Cannot Detect / Install Starter Ink
Cannot identify a black ink cartridge. (The sensing timing of the ink remaining sensor, ink
cartridge detection sensor and high-yield ink cartridge sensor is off.)
Error Code 21
Cannot Detect / Install Starter Ink
Cannot identify a yellow ink cartridge. (The sensing timing of the ink remaining sensor, ink
cartridge detection sensor and high-yield ink cartridge sensor is off.)
Error Code 22
Cannot Detect / Install Starter Ink
Cannot identify a cyan ink cartridge. (The sensing timing of the ink remaining sensor, ink
cartridge detection sensor and high-yield ink cartridge sensor is off.)
Error Code 23
Cannot Detect / Install Starter Ink
Cannot identify a magenta ink cartridge. (The sensing timing of the ink remaining sensor, ink
cartridge detection sensor and high-yield ink cartridge sensor is off.)
User Check
- Reload the ink cartridge.
- Replace the ink cartridge.
Step
1 Ink cartridge detection sensor
defective
2 Ink remaining sensor or high-
yield ink cartridge sensor failure
3 Main PCB defective
Cause
Replace the ink cartridge detection sensor.
Replace the ink refill ASSY.
Replace the main PCB ASSY.
2-27
LCD
LCD
LCD
LCD
Solution
Confidential