Brother International IntelliFax-3550 Service Manual - Page 174

1 2 3 4 5 6 S OV +5V M5 V R6 2 L6 0 0 R7 1 4. 7K AREF C6 5 C1 3 5 100 F/ 6. 3V +5V * +5V R7 0 C8 6 CC1 0 4 R1 6 8 #7 4. 7K CC1 0 4 0 RF X1 4 4 C7 5 MOV M5 V A 25 6 CC1 0 4 M0 V AVDD 35 VAA1 VDD1 58 VDD2 C7 6 A M0 V 45 VAA2 L 77 VDD3 CC1 0 4 16 DGND1 C9 9 82 SR4 I N 67 / CT S CC1 0 2 83 S R3 OUT 20 T RESET 93 DCL K 92 / RL SD S0 V R2 1 4 87 SA1 CL K 96 / RT S R1 0 5 6 8 K 17 RX OUT 99 TXD 74B RI N C1 0 0 CC1 0 4 R1 0 6 68K 2 - 3 + 1 R1 0 7 C8 5 RRI NG 74C 79 SR3 I N 24 T XDAT 90 S R4 OUT 86 I A1 CL K 19 T S T ROB E 100 RXD 14 D0 13 D1 12 D2 DBUS R1 6 7 R1 6 6 27K #8 KI 3 2 4 4. 7K CC1 0 4 M0 V D9 HZ 5 . 1 B S0 V 13A MR S T 23 T MOD E 88 SR1 I O 18 R MOD E 72 / RESET 11 D3 10 D4 9 D5 8 D6 220K AREF 47 / P OR 7 D7 71 5 A 1 ABUS R9 8 6 8 K GP O0 RS0 36 4 A2 / SL EEP RS1 +5V 46 3 A3 / OH RS2 B 26 2 A4 / TAL K RS3 38 1 A5 R1 6 9 B C9 6 RI N RS4 22K R1 0 4 CC1 0 4 56K 28 TXA1 78 / I RQ2 MI N T 11B 6 29 68 - TXA2 / I RQ1 74B TXO 7 44 SPKR 53 / READ RD 12B R9 7 4. 7K + 5 #8 R9 9 C9 4 40 VREF 39 VC 15 / WR I T E 52 / CS L WR MC E 12B 13A M0 V KI 3 2 4 56K R1 6 5 68K CC1 0 4 AREF C6 10V / 10 C8 4 CC1 0 4 45C 45C 45C GP I 0 GP I 1 GP I 2 95 GP I 0 98 GP I 1 54 GP I 2 5 5 GP I 3 76 YCL K 75 XCL K 66 DGND2 80 DGND3 NC NC C7 10V / 10 C8 3 CC1 0 4 5 6 GP I 4 5 7 GP I 5 5 9 GP I 6 81 DGND4 97 DGND5 21 DGNDA 1 +5V +5V S0 V 6 0 GP I 7 30 DGNDA 2 S0 V M0 V 74C MS L 7 0 GP O1 6 9 GP O2 6 5 GP O3 43 DGNDA 3 84 EYESYNC 85 EYECL K * R6 7 * R6 4 R1 2 3 22K 74B 75D S P ON V OL 1 6 4 GP O4 6 3 GP O5 6 2 GP O6 89 EYEXY 27 A GND1 37 A GND2 44C 44C GP I 0 GP I 1 C 75C V OL 2 6 1 GP O7 44C GP I 2 C 94 / EN8 5 M0 V 48 CL KI N 50 I ACL K 73 XTL I 74 XTL O * R6 6 0 * R6 5 0 R5 1 100 C5 9 10pF * XT3 C5 8 10pF S OV S0 V * L2 2 . 2 UH * C5 7 33pF S0 V D D A MAIN 4/8 MFC4550plus/7650MC 1 2 3 4 5 6