Brother International HL 1850 Service Manual - Page 88
Engine, 1870N, shows, engine, interface, circuit., duplex, synchronous, serial, method., Panel,
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HL-1850/1870N SERVICE MANUAL 1.3.9 Engine I/O HL-1850 HL-1870N Fig. 3-19 shows the engine interface circuit. The interface with the engine PCB is by fullduplex synchronous serial method. m 0 0 co ,-) ETX DOI. ?- 4F ER KO- vi 2- 2F ENGRESN M.I)-n5F >8 0 2) • • R143 • V\Ai 100 • r7sr, rc--o-_ (_) 0-iccyip) ,-io e-n iccnu - cum tn 61- 0 u • h CCDr) e 4 >- •c-i 1 CE L6 BLM11P600S L 4 L 3 L 2 L rY- ymBLM111.600S 1 3. 3V 3 TXD 4 < RXD 5 RESET CN7 6 5V L2 , 3,4 - 'COIL BLM112,6015 5 BLM111.600S 2 < ov Fig. 3-14 1.3.10 Panel VO HL-1850 HL-1870N Fig. 3-15 shows the panel interface circuit. The interface with the panel PCB is by full-duplex synchronous serial method. BLM11P600S L7 VDD50-0-r eTh-• 5 > VD05 PNLCLK ► 2-4C PTXD ► 2-4C PRX0om 2- 3C ID he U CD CU UST Rv12i3n 100 (11 Uti I LJ CN8 PCLK 3 SDDUT 2 < SDIN 6 >