HP FAX-750 Service Manual - Page 179

1 2 3 4 5 6 7 8 +5V A PANEL +25V +5V 1 6 2 4 3 5 R4 3 2 7 0 R4 4 0 R1 3 8 4 7 0 1 6 B PCL K 1 6 B S DOUT 1 6 B SDI N P1 3 1 / 2 C1 0 9 CC1 0 4 C4 0 * C4 1 * C3 9 CC1 0 1 B Q5 RH5 VA4 3 R1 0 4 RST L 1 6 A, 1 6 B, 3 4 D, 4 7 B, 5 7 E #8 1. 5K T 7 D9 8 VCC OUT 44 RST 64 RT CCON RST L 1 4 A A GND C8 7 CC1 0 4 C6 1 CC1 0 4 143 141 EXT L XTL 61 RVDD 62 REXT 63 RX T +5B GND 15P 15P GND 2 5 C RAS 2 5 C CAS R8 2 1 0 0 R1 0 5 1 0 0 2 7 B RMRD XT 1 C S T 1 6 MX W 2 7 B R OMC 70 75 124 123 122 166 167 RAS0 CAS R MR D R M WE R OMC I ORD I O WE 1 2 B PCL K 1 2 B S DOUT 1 2 B SDI N 177 176 175 PCL K S DOUT SDI N CRXD CKS TXD RXD CT S 202 199 196 197 198 84 MM1 85 MM2 86 MM3 87 MM4 CRX D CKS TXD RXD CT S MM1 MM2 MM3 MM4 C6 2 CC1 0 4 GND PBUS 5 6 B MB U S 2 3 C XT 3 C- 0 0 1 R C7 1 CC1 0 P C7 0 CC1 5 P GND R7 8 B +5B 67 CK3 2 ON 45 TSTA L5V 66 CK3 2 46 T ST B GND R7 7 1 0 0 68 BAKCL K I ORQ MR E Q 125 126 I ORQ MR E Q R1 0 3 1 0 K L5V 1 4 A RST L 73 B A E NB 140 CK1 6 CK1 6 +5V C6 3 CC1 0 2 B +5B GND 74 B A V DD 65 BAKSEL 144 CK8 M R1 0 2 145 RD RD #8 T 7 D9 8 C6 4 CC1 0 4 2 5 C B A R MR D 2 5 C B A R MWE 72 B A R MR D 71 B A R MWE WR N MI 146 168 WR RBUS 3 4 D R7 2 GND 169 * R2 2 I NT 57 170 3 3 A L I GT 4 1 F DASND 4 3 D DAREC C R1 3 7 R7 4 1 0 K R7 1 1 0 k R7 3 1 0 k R1 2 8 1 0 k L5V R1 2 9 R7 5 10k 10k 17 16 M I O 0 ( P WM ) A D P D M D 200 18 14 M I O 1 ( P WM ) A A P D M D 19 12 R7 0 M I O 2 ( P WM ) D P D M D T 20 11 R2 4 MI O3 D P D MC K 21 9 R6 9 MI O4 A P D MC K 200 300 300 22 MI O5 8 A P D MD T A D MD A A MD D MT D MK A MK A MT 4 2 F ADL C L NC R( COMP ) BSAK GND 4 6 E VOL 1 83 S OL ( OD) 171 BSRQ 41E EAT 82 P WO N 172 WA I T 3 5 F , 4 2 B CML H 187 C ML 173 RF SH 4 1 E RDPS 188 DPS 174 M1 42E PL S 189 PL S 4 3A TELL 191 TEL 136 A0 A0 C 23 3 C3 * C5 8 C5 7 C5 9 4 3 B T ADH MI O1 1 C5 3 7 E HOOK 192 HOOK 137 A1 A1 CC1 0 4 CC1 0 4 4 4 D TXSL 24 MI O1 2 2 C4 C4 193 42F CI CI 138 A2 A2 25 1 C5 4 5 D HAF H MI O1 3 C3 4 2 F T L OF 194 T L OF 139 A3 A3 205 6 C0 +5V MV D D C2 L5V 195 STD 148 A4 A4 GND C8 3 CC1 0 4 5 C1 C1 4 C2 C0 4 5 E RNGO 4 6 E S P ON 39 RI NG 40 S P ON 149 A5 A5 150 A6 A6 GND 208 MV S S 13 A MU T E A MU T 4 6 D RNGL 184 E2 CS 151 A7 A7 204 MON MD C K 7 MU T E MU T T BUS 4 8 A, 5 8 D 4 2 D OT O 203 CT XD 152 A8 A8 R1 3 0 153 A9 A9 4 1 F DAST 103 L I G T ( P WM ) 207 ME X T L 154 A1 0 A1 0 206 MT X L R1 2 7 1 M 3 2F LATC 89 P O1 155 A1 1 A1 1 C1 1 1 4 6 E VOL 3 3 7 C RI BN 4 2 F T L OF 2 80 S E ON( OD) 76 SEN2 77 SEN3 78 SEN4 DA0 DA1 DA2 109 110 111 R1 1 9 2 0 0 R1 1 8 200 DA0 DA1 DA2 XT 2 D 1 4 . 4 MH z R6 8 470 D GND 3 7 B FSEN 79 SEN5 112 DA3 RA1 200 DA3 3 3 C C L MP 3 3 C C P WM 185 186 P O2 P0 3 ( OD) 26 R M1 A1 2 A1 3 A1 4 A1 5 MA 1 6 157 158 159 160 161 ABUS 2 6 B, 3 4 D D 3 7 B RSEN 30 SEN6 113 DA4 DA4 C8 2 C5 4 2 5 B EPCK 27 R M2 162 MA 1 7 3 7 D CSEN 31 SEN7 115 DA5 DA5 CC2 7 P CC2 7 P 23F S OL 28 R M3 163 MA 1 8 GND +5V E5 V 3 7 C REAR 32 SEN8 DA6 DA7 116 117 RA2 200 DA6 DA7 3 5 E P WO N 29 R M4 178 ODP I O0 32E 32E ST1 ST2 92 ST1 91 ST2 DA8 DA9 118 120 DA8 DA9 DABUS 2 6 B, 2 5 E GND GND R1 0 1 * 182 183 P I O1 PI O2 ODP I O1 ODP I O2 ODP I O3 179 180 181 32E HDC 93 HDC 127 D0 D0 0 3 4 C SRAM 108 42 P I O3 ( S R A M) OD P I O4 V OL 2 4 6 E 32E DI N 94 DI N 128 D1 D0 1 2 5 B EPDO 41 P I O4 ( OD) 90 129 D2 3 2 E DOUT DOUT D0 2 4 5 A HRAD 121 P I O5 33 F DCL K 130 D3 D0 3 69 P I O6 34 F DOUT GND E0 V 131 D4 D0 4 106 133 D5 3 4 C SYCS E1 CS D0 5 35 F DI N 36 F CS1 107 134 D6 3 4 C S MC S P S L ( S MC ) D0 6 88 EI T1 37 F CS2 102 135 D7 3 6 C RDAT RDAT D0 7 +5V DBUS 2 5 E, 3 6 D E 2 3 D MT I 1 95 CL 2 10 VDD +25V 2 3 D MT I 0 98 CL 1 43 VDD 99 CL B 97 VDD L9 L10 L11 L12 C7 2 R8 3 75K 32A RB 3 2 A, 3 4 C TG 100 101 104 RB DI F TG VDD VDD VDD VDD 114 132 147 165 0 L5V E5 V R8 1 1 0 KF C6 9 CC1 0 4 3 2 D CP3 I 32B VI D 52 RDA6 1 56 CP1 I 55 CP3 I VDD VDD 190 201 54 CP4 I 15 VSS R7 6 75F GND E0 V 53 CPNN 50 RDA 6 38 VSS 60 VSS 81 VSS E5 V 51 AVDD 96 VSS C5 5 C5 6 C6 0 C8 4 C8 5 C8 6 C8 8 C8 9 R7 9 58 AVDD 105 VSS CC1 0 4 CC1 0 4 CC1 0 4 CC1 0 4 CC1 0 4 CC1 0 4 CC1 0 4 CC1 0 4 100F F 49 REF H 48 REF L VSS VSS 119 142 R8 0 75F C6 5 CC1 0 4 C6 8 CC1 0 4 C6 7 CC1 0 4 C6 6 CC1 0 4 47 A GND 59 A GND VSS VSS VSS 156 164 200 L15 L102B E F Main PCB 1/6 E0 V E0 V GND GND FG A (FAX870MC/MFC970MC/FAX-930/ FAX-931) 1 2 3 4 5 6 7 8