FUJITSU C141-E185-01EN MAS3184NC/NP - Manual (Page 68)

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Figure 4.21 Output signal for external LED
e.–WTP: Input signal (CN1-A12 and CN2-9, 10 pin)
By connecting the CN1-A12 and CN2-10 pins to the GND, writing operations into the IDD
disc media are set to disable.