1.color300
Paper feed key + cleaning key + startup key, release and press the paper feed key + cleaning key for 10 seconds (the ink light and paper feed light flash)
2.color800
Paper feed key + black cleaning + color cleaning + start button, release your hand and press color cleaning for 3 seconds.
3.mj1500k(k+)
Switch + fine adjustment ↓ + pause + line break/page change + boot, all lights are on and let go
4.color1520k
Switch + paper feed/return paper + line wrap/page change + fine adjustment ↑ + power on, all lights are on and let go
(xl+)
alt +font+load/eject+pause+start
6.stylus1000
Switch + ink saving/compression + paper feed/paper return + pause + power on
7.mj500
Paper feed + black cleaning + color cleaning + boot up, press the paper feed button for 3 seconds
Paper feed key + cleaning key + startup key, release and press the paper feed key + cleaning key for 10 seconds (the ink light and paper feed light flash)
2.color800
Paper feed key + black cleaning + color cleaning + start button, release your hand and press color cleaning for 3 seconds.
3.mj1500k(k+)
Switch + fine adjustment ↓ + pause + line break/page change + boot, all lights are on and let go
4.color1520k
Switch + paper feed/return paper + line wrap/page change + fine adjustment ↑ + power on, all lights are on and let go
(xl+)
alt +font+load/eject+pause+start
6.stylus1000
Switch + ink saving/compression + paper feed/paper return + pause + power on
7.mj500
Paper feed + black cleaning + color cleaning + boot up, press the paper feed button for 3 seconds