Brother International HL 1230 Service Manual - Page 68
Engine I/O, HL-1450/1470N, HL-1230/1440
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CHAPTER 3 THEORY OF OPERATION HL-1450/1470N The reset IC is a RN5VD42A. The reset voltage is 4.2V (typ.) and the LOW period of reset is 80ms (typ.) Fig. 3-22 1.3.9 Engine I/O HL-1230/1440 Fig. 3-22 shows the engine interface circuit. The interface with the engine PCB is by fullduplex synchronous serial method. Fig. 3-23 HL-1450/1470N Fig. 3-23 shows the engine interface circuit. The interface with the engine PCB is by fullduplex synchronous serial method. Fig. 3-24 3-18
CHAPTER 3
THEORY OF OPERATION
3-18
The reset IC is a RN5VD42A.
The reset voltage is 4.2V (typ.) and the LOW period of reset is
80ms (typ.)
Fig. 3-22
1.3.9
Engine I/O
Fig. 3-22 shows the engine interface circuit.
The interface with the engine PCB is by full-
duplex synchronous serial method.
Fig. 3-23
Fig. 3-23 shows the engine interface circuit.
The interface with the engine PCB is by full-
duplex synchronous serial method.
Fig. 3-24
HL-1450/1470N
HL-1450/1470N
HL-1230/1440