Sharp ER-A450T Service Manual - Page 53
Rs232c Circuit Diagram Opc2
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8 7 6 5 4 3 RS232C CIRCUIT DIAGRAM (OPC2) D C VCC C273 33uF/10V "OS" B A VCC C274 10uF/50V VCC R350 0 ohm R361 0 ohm /DCD1 /CS1 VCC R362 10K /CS1 C277 330pF /DCD2 /CTS2 /CI2 /RTS2 VCC VCC R347 0 R343 0 /CTS1 RCVDT1 /CI1 /RTS1 BRK2 TRNEMP2 RCVRDY2 TRNRDY2 RCVDT2 BRK1 TRNEMP1 RCVRDY1 TRNRDY1 VCC R346 0 X 2 R345 /CS2 R342 10K /CS2 C270 330pF CLK_USART AB0 AB1 FL1 EMI FILTER VCC R349 10K X 2 R348 C276 100pF X 2 C275 D[0..7] X5 9.83M D0 D1 D2 D3 D4 D5 D6 D7 R366 1M /POFF /IRQ1 /TRQ1 A0 A1 A[0..5] VCC IC29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 SL00 SL01 SL02 SL10 SL11 SL12 SL20 SL21 SL22 SL30 SL31 SL32 CD0 BRK0 TRNEMP0 RCVRDY0 TRANRDY0 CTS0 RCVDT0 VCC GND CI0 RTS0 CS0 CD1 BRK1 TRNEMP1 RCVRDY1 TRNRDY1 CTS1 RCVDT1 CI1 RTS1 CS1 CD2 TRNEMP2 RCVRDY2 TRNRDY2 CTS2 RCVDT2 CI2 CS2 CD3 BRK3 TRNEMP3 RCVRDY3 TRNRDY3 CTS3 RCVDT3 CI3 CS3 D0 D1 D2 D3 GND D4 D5 D6 D7 GND VCC X1 X2 XOUT TRCK AB0 AB1 US1CH PX POF RSRQ TRV RXDATA0 TXE TRRQ TRQ1 TRQ2 A0 A1 OPC2 VCC MCLK RST RSLCT1 RSLCT0 RIN WIN SYCBKD TRNEMPD RCVRDYD TRNRDYD DSRD CTSD RCVDTD RTSD DTRD TRNDTD CSD GND VCC SYCBKC TRNEMPC RCVRDYC TRNRDYC DSRC CTSC RCVDTC RTSC DTRC TRNDTC CSC GND SYCBKB TRNEMPB RCVRDYB TRNRDYB DSRB CTSB RCVDTB RTSB DTRB TRNDTB CSB GND SYCBKA TRNEMP1 RCVRDYA TRNRDYA DSRA CTSA RCVDTA RTSA DTRA TRNDTA CSA UTST DBTST RCVCLK TRNCLK RES GND VCC W R DB7 DB6 DB5 DB4 GND DB3 DB2 DB1 DB0 RES VR RD OPTCS A5 A4 A3 A2 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 CLK_USART RES_YSART AB1 AB0 /RDH /WRH BRK2 TRNEMP2 RCVRDY2 TRNRDY2 /CS2 BRK1 TRNEMP1 RCVRDY1 TRNRDY1 RCVDT1 /CS1 A5 A4 A3 A2 2 1 10/12 VCC D C310 10uF/16V C271 0.1uF R365 0 RCVDT2 C /DSR2 RCVDT2 /DTR2 TXD2 /DSR1 /DTR1 TXD1 VCC B R363 10K X 2 C288 R364 /WRH /RDH C289 330pF X 2 /WRH /RDH /RES /WR0 /RD0 /OPTCS A 8 7 6 5 4 3 2 1