Preliminary W91560DN SERIES
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Press "M2" key
(M2 = "314P4430256")
Press "CHK" key
The system will go back to timer mode after 6 seconds
(Timer count up continuously)
After the flash break is executed
Blinking
After the flash pause is executed
Blinking
Press "F1", "F2", "F3" or "F4" key
(The timer will stop and the LCD will display a flash mark and flash pattern)