Brother International 8250P Service Manual - Page 181
C OV E R, T N OR, L OC K, R OM2, MT D I, V OL 3, S A MP, S OT H R, CC104, R A M U WE
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1 2 3 4 5 6 A S I C MF C 2 A +5V 74C 73B 71C RI NG TEL MU T E 76 RI NG 74 TEL 91 SEN3 93 SEN5 75 S P ON 122 P7 1 F AN1 S P ON RNG 55D 75B 75C 51C 44B 45C HAI SI MC E MR S T 94 SEN6 39 MC E 41 MR S T 65 PA3 29 P M1 30 P M2 MS I L P M1 P M2 55A 55A 55A 53B L OCK 1 1 3 PB5 18 RVDD RVDD 66B A BD 55C R1 4 1 0 1 0 0 BD C9 9 2 2 B, 2 2 D R OM2 1 3 1 E R OM2 CC1 0 4 RESI 1 2 1 R1 4 0 22K 72B 73C TL SW DAREC 90 SEN2 68 P WM 3 208 D1 5 33C 33D PCL K S DOUT 44 PCL K 46 S DOUT 31 P M3 32 P M4 P M3 P M4 55A 55A 51C 51C T CS 1 2 5 COV E R 1 2 6 P7 0 P7 4 RT CCON S0 V 19 10 RS 11C 71C ADL C 72D DAST 82 AN0 67 P WM 2 207 D1 4 206 D1 3 33D 34C SDI N CI SCL K 45 SDI N 56 S MP C 33 C MP P A C MP P B 3 4 HOOK RSEN 55C 33D 51C 53A P7 5 T NOR 1 2 7 P7 6 S OT HR 8 3 BAVDD +5B C9 8 CC1 0 4 72C DASEND 6 6 P WM 1 205 D1 2 53C C MP R A 35 C MP R A S OL 3 7 S OL 56C 51D HET H AN1 85 72A C6 3 CC1 0 4 72D 72A 72D P OL C1 T L OF EAT 88 SEN0 7 7 C1 89 SEN1 95 SEN7 204 D1 1 D1 0 2 0 3 202 D9 199 D8 CL K2 4 35C R1 1 4 L7 200 53C LL241 34C 36C C MP R B CSI P PD 36 C MP R B 42 CL K2 4 55 CSI P 47 I PD0 SCN 101 CL K DRI VE 1 0 2 VDO 9 8 L DON 9 9 SCCK DRI V SCDT L DON 53B 53B 55B 51A 51B 53C R M1 R M2 AN3 84 AN2 110 L ASP 25 R M1 26 CK3 2 S0 V 13 R1 1 0 C9 7 CC1 0 2 100 72D S0 V 71A 7 2 A, 7 3 C DPS PL S C ML H 72 DPS 73 PL S 71 C ML 198 D7 197 D6 48 I PD1 49 I PD2 50 I PD3 103 HVT P 104 HVT N 105 HVCH T ENH T ENL TAI D 51A 51A 51A 53C 53C 53C R M3 R M4 MT I 0 R M2 27 R M3 28 R M4 115 11 BACL K BAENB 1 2 S0 V 44C MI N T 40 MI N T 196 D5 195 51 I PD4 52 106 HV GZ 107 GE NZ VCL N 51A 53C 53D MT I 1 PA0 78 PA1 * R1 2 3 0 +5B 2 4 A, 2 4 A, 2 4 C R1 3 8 6 8 UCAS 6 UCAS D4 194 D3 I PD5 53 I PD6 HVCL ERASE 1 0 9 51B EL 53B 26B XSEN 1 3 4 P8 5 ( ) B 2 4 A, 2 4 B, 2 4 C 2 4 A, 2 4 A, 2 4 C 56D F ANCNT 1 2 4 P7 3 23D R A MR D ESD R1 3 7 133 EEDAT 10 7 R A MR D CAS R1 3 9 6 8 5 L CAS # 5 24A RAS3 4 RAS3 24A RAS2 3 RAS2 193 D2 192 D1 191 D0 RD 1 6 7 163 H WR 166 WR DBUS R1 3 4 1 0 RD R 1 3 5 1 0 L WR 2 2 B, 2 2 D, 2 6 A 3 5 C, 4 4 C 2 2 B, 2 6 A 3 2 B, 3 5 C TG 54 I PD7 108 HT O 58 RB 57 SH 59 CL 2 #5 24 EXVD 141 CB S ON 62 CL 1 160 HBUSY 63 T RG SEL I N 1 5 9 HT O XVDO HBUY SEL I N 51D 26A 65B 65B 26A +5V EXCS R1 2 4 2 2 K 2 2 EXCS1 * R1 2 2 22K VDD 26A +5V EXI NT R1 1 3 2 2 K 2 3 #5 EI NT 1 OUT Q2 3 B RH5 VA R1 5 6 C1 0 1 CC1 0 1 CK3 2 0 N 1 4 +5V SRAM 2 2 K S0 V 123 +5B GND 2 4 A, 2 4 B 24A RAS1 RAS0 2 RAS1 1 RAS0 111 SEN8 168 A2 0 V OL 2 75D 3 5 C, 4 3 B 32A L ED 64 PA2 201 VDD P R MI N T FLT 1 5 8 P R MI N T 157 FLT 65B 65B 34C 23D EECK 132 70 P7 2 EECK R1 1 2 S0 V 2 1 B, 2 1 D R OM1 162 R OM1 169 4 A1 9 5 R M WR R1 3 6 1 0 8 170 3 6 2 4 A, 2 4 A, 2 4 C R A M WR A1 8 190 VDD 165 VDD 156 SL CT 155 PPE SL CT PPE 65B 65B S0 V A M8 1 6 69 P WM 4 20 BKSL C1 1 2 C1 0 3 C1 1 3 C1 2 5 C1 2 0 C1 0 2 () () C9 5 XT2 N C 9 R A M U WE 17 RXT 16 REXT C- 0 0 1 R C9 6 171 2 A1 7 172 A1 6 1 173 4 A1 5 A1 4 1 7 4 3 175 2 A1 3 176 A1 2 1 DA1 11 7 7 4 7 RA1 8 68x4 5 6 7 RA2 8 6 8 X4 5 +5V CC1 0 4 x 6 147 VDD 114 VDD 97 VDD 61 VDD 43 VDD 21 VDD BUSY ACK STB DC7 DC6 DC5 DC4 153 152 161 143 144 145 146 BUSY ACK STB 65A 65A 65B +5V Q2 5 2 SC3 9 2 8 A 51B HVCR C1 4 1 CC1 0 4 R1 4 5 10K C1 1 5 CC1 0 4 R1 4 4 10K 76C 75C 55A 36C V OL 3 V OL 1 128 P7 7 120 PB6 129 CL K MT D I 1 9 2 SEN4 S A MP 1 1 2 SEN9 R1 1 1 0 S 0 V M5 V 81 AVDD C1 1 4 CC8 P CC1 2 P 178 3 6 DA1 0 148 DC3 80 CC1 0 4 179 2 DA9 7 RA3 +5V 181 1 DA8 8 68x4 S0 V 182 4 5 C1 2 3 R1 5 4 1 6 A, 2 6 A C CC1 5 4 Q1 2 1 . 5 K 3 4 C, 6 5 D DA7 183 3 6 DA6 ( 2125) 5 R1 5 5 1K 184 2 DA5 7 RA4 C1 2 4 S80942 1 RS 130 RST 185 DA4 1 8 68x4 15 GND 149 DC2 S0 V S0 V S0 V A GND ( 38 150 GND 60 GND 96 GND 119 GND 142 GND DC1 151 DC0 P8 4 1 3 5 138 CT S DCBUS 65C +5V R1 8 0 22K +5V R1 8 1 22K +5 V P2 B6 B- PH 1 CT S 4 116 TST1 79 TST2 86 TST3 87 M0 V C CC1 0 4 4 C1 2 2 R1 5 7 186 4 5 DA3 154 GND 137 RT S RT S 3 TST4 3 CC1 0 2 2 2 0 118 187 3 6 DA2 EXTL 188 2 7 RA5 DA1 S0 V R1 5 8 1M 189 DA0 1 8 68x4 ABUS 164 GND 180 GND 200 GND 139 RXD 140 TXD 136 P8 3 OP ON RX 5 TX 6 S0 V S0 V S0 V 117 EXTL 2 S0 V S0 V S0 V XT1 2 4 . 5 7 MH z S0 V PCBCH R1 0 0 R7 0 R1 6 5 ) C1 2 6 CC1 5 p C1 2 7 CC1 5 p S0 V FG FG FG S0 V RA1 2 150 x4 D7 R 4 5 D7 D6 R 3 6 D6 D5 R 2 7 D5 D D4 R 1 8 D4 D3 R 4 5 D3 D2 R 3 6 D2 D1 R 2 7 D1 DRBUS D0 R 1 8 D0 DBUS RA1 3 150 x4 D A Main PCB 1/8 1 2 3 4 5 6