Epson TM U200D Technical Reference - Page 160
RS-232 Serial Interface Circuit Board Diagram
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RS-232 Serial Interface Circuit Board Diagram TM-U200D/U200PD/ Technical Manual TO HOST FG SD/SD1 RD/SD2 RS/RD1 /RD2 DR/INIT1 SG /DR1 /DR2 /CS1 /CS2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ER 20 21 22 23 24 INIT2 25 SHELL 0 CN1 U1 16 C2 4 5 RD 13 DSR 8 SD 14 DTR 7 15 C1 VCC V+ 2 C2+ C1+ 1 C2- C1- 3 R1I R2I R1O R2O 12 9 T1O T1I T2O T2I 11 10 GND V- 6 C7 SG RTS +5V +12V C3 RD DSR SD DTR SG RTS D1 DSR #25INIT R2 C6 -12V R20 S G D2 D3 C4 R15 R12 R11 SG D4 + + 1 5 2 V V SG R16 R4 R17 R18 R5 R13 R14 R6 R19 RTS +12V R3 +12V 8 3 1 2 U2A 4 -12V -12V +12V R9 5 7 6 U2B R10 -12V D# S2 R5 || RR EE SS EE TT + 5 V DSR DTR +5V SD RD #25_RESET DSR_RESET SG R7 Q2 TO MAIN BOARD CN2 + 5 V TP2 R21 R1 RTS DSR DTR +5V SD RD 1 2 3 4 5 6 7 8 9 S1G0 11 12 13 14 15 16 17 18 19 20 21 22 SG 23 24 25 26 27 28 29 S3G0 DK 1 DK S PG PG +24V +24V PG HOST RTS CTS I/F DET RTS CLKOUT/DTR CLKREQ SG +5V DK 2 DK G DK P PG +24V +24V PG SG SD RD (RES) #25_RESET DSR_RESET #RESET SG Q1 R C5 T 10K S 10K TP1 10K 10K RTS R8 Rev. B A-12