3. CPU (MN158418YCY) PIN FUNCTION Pin No. Signal I / O Function 1 ~ 7, 64 P00 ~ P13 Common signal for keyboard 8 ~ 12 P20 ~ P22, P32, P33 Key signal from keyboard Timing pulse signal from printer DEBIN Reset pulse (Not used) IRQCNT...
5. TROUBLESHOOTING Trouble Cause Checkpoint Note 1) Does not work • Defective power transformer Secondary voltage VDD, VSS, VM, VF1, and of transformer VF2 are OK? at all. • Defective LSI Waveforms of each VF1, VF2 2) No display. • No voltage at VF1, VF2 •...
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7-4. Printer Pin Arrangement Diagram Connection Pin No. Pin No. Connection RD terminal Character selective magnet column No.1 (Not used) Character selective magnet column No.1 Notes: 1. Column numbers match the physical arrange- ment of the columns on the print wheels. 2.
1S2472-T-77-T D13, 14 2301 0101 Diode 1S2473-T-77-T DIG1 3301 0217 Display tube 13-BT-144G The following elecrical parts will be not supplied from CASIO. 2845 3241 Semiconductive capacitor DD308-959F104Z50 2803 9198 Electrolytic capacitor RE2-50V331M-T2 2803 8199 Electrolytic capacitor RE2-25V222M-T50 2813 3178 Semiconductive capacitor...
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6419 5010 Roll arm L- L227A P340024-1 The Parts prices will be informed separately by Parts Price List. Notes: N – New parts A: DR-120LB Q – Quantity used per unit B: DR-320B R – Rank C: DL-210L D: DL-200L...