TK-2180 SCHEMATIC DIAGRAM507654321A B C D EX54-347 1/2R541 470R540 470L556R543 470R5740CN508E40-6413-051234567891011121314151617181920CN507E40-6410-0512345C5384.7uC555 1uC564 1000pR544180kR580330L553C503 470pC5541000pC5374.7uR576330L554C502 470pC525470pC5531000pR5710C556 1000pR560470kC500 470pR57833011A23Y32A4GND5 2Y6 3A7 1Y8 VCCC524 4.7u16R545470k(D)1VIN2VSS3NC14NC25VoUTR552 470R54722kR54627k(D)R573 470kC5281u102SJ144(Y)Q505S DGC523 4.7u16C563 1000p11A23Y32A4GND5 2Y6 3A7 1Y8 VCCR579330L550C5271u10C557 470pC565 1uC501 470pR577330R542 470SIDE KEYSECTIONGND(X54-3470-11)LCDRSTK1SW2CONTRAST CONTROLDISPLAY UNIT5MSW1LCD ASSY(B38-0900-05)PTTIC503HD74LV2G34AUSLCD CONTROLIC502HD74LV2G34AUSLCD CONTROLPTTSW1K1SW2GNDPTTDATACLKLCDCSLCDRSSW1SW2IC501XC6201P352MRVOLTAGEREGULATOR/LCDRESETOSC1R/WCSSIOV5outRSSCLC2-OSC2VciVDDC1+V5P/SNCC1-VssC2+Vss4.98V3.51V3.51V