Labels:text | screenshot | black and white OCR: Tocom 5504 A/B With CPU P8155 1. Cut Trace Leading to Pin 35 of U6 2. Connect pin 8 of U1 to Pin 1 of U6 3 Connect Pin 3 of U6 to SPST N.O Pushbuton. Oher Side of SW goes to GND. 20 4 Connect Pins 7 & 8 of US Together. SCUT> 35 U9 3.11 21 P8155 J3 0OG00000000000000000 U7 SPST N.O. Switch 5 H 10 .16 Connect Pins 14 7 & 8 of U8 > U8 Together Piggy-back a 74LS175 onto U19, Soler pins 74L5175 8 to 8 and pin 16 to 16. Bend the rest of the LS175 pins out for the jumpers as shown. U19 4 b16 14 The pushbutton switch is pressed once to begin 2.5 V. operation. After a click is heard, select desired channel. 610-0140
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