Brother International IntelliFax-3550 Service Manual - Page 161
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1 2 3 4 5 6 MF C 4 5 5 0 , 6 5 5 0 , 7 5 5 0 A +5V RA4 1 . 0 Kx 4 RA6 2 . 2 Kx 4 RA8 2 . 2 Kx 4 A +5V P1 5 5 7 L E4 0 3 6 0 10 11 12 13 32 31 36 14 1 2 2 6 3 5 4 8 1 5 4 8 1 7 2 6 3 5 4 6 3 7 2 8 1 R7 1 5 0 8 1 6 3 RA5 7 2 100x4 5 4 R6 1 5 0 R8 1 5 0 - ACK BUSY PPE - SL CT - FLT P R MI N T SEL I N HBUY STB 14C 14C 14B 14B 14B 14B 14B 14B 14C 1 D3 MA 7 0 0 2 R1 2 1K C2 5. 5V 473F S0 V F AX3 5 5 0 , DS MF C 4 5 5 0 , D S 9 5 4 DC7 B B 8 6 3 RA7 DC6 100x4 7 7 2 DC5 6 8 1 DC4 RVDD 16A 5 5 4 DC3 4 6 3 RA9 DC2 100x4 R1 4 3 7 2 DC1 0 +5V +5v 2 8 1 DC0 C5 3 C5 2 C5 1 C5 0 C4 9 C4 8 C4 7 C4 6 CC4 7 1 C 4 2* C4 4 C4 3* C4 5* C4 1 C4 0 C3 9 C3 8 C3 7 16 17 19 20 21 22 23 C 24 25 26 27 28 29 30 S0 V 18 NC DCBUS 14C D2 1 SS1 3 3 R1 3 0 L1 0 +5B S0 V CC1 0 1 x 1 6 +24V Q5 2 SA1 3 6 4 R2 0 9 1 0 KF R9 10K R1 0 4. 3K D1 1 SS1 3 3 Q6 DT C1 2 4 EK R1 5 1K C1 8 CC1 0 4 C1 10V 100 C S0 V +5V R2 0 8 3 6 K +5V P1 4 S0 V B2 B- PH 1 Q3 RH5 R4 7 GND VDD S OV 2 SA1 3 6 4 Q4 R2 0 6 1 0 KF 3 + 4 #23 1 - R2 0 7 18K C1 6 CC1 0 1 OUT 2 S0 V R1 1 33K RS MF C 6 5 5 0 R2 0 5 4. 7K TA7 5 S0 1 F C1 4 2 CC1 0 4 S0 V MF C 7 5 5 0 S OV +5V 5 2 #23 D C1 4 1 D CC1 0 4 S0 V MAIN 6/8 A FAX3550/3650/8000P/8200P MFC4550/6550MC/7550MC MFC9000/9500 1 2 3 4 5 6