UBI EasyCoder 501 – Service Manual12317.6:4Data Shiftout to Printhead17. CPU BOARD, cont'd.WRADDRAD0–AD15, A1-23DATAOUTIC511ADSTB/DMAHLDABUSIC505D A9129AD8 D A10138AD9 D A11147AD10 D A12156AD11 D A13165AD12 D A14174AD13 D A15183AD14 D A16192AD15OE1 LE1174HC573MWRADDR/DMAHLDAGNDAD6AD0AD5AD1AD4AD2AD3 A20129A19138A21147A18156A22165A17174A2318319211174HC166MGNDSCLKSHIFT+5VAD7AD6AD5AD4AD3AD2AD1AD0 14121110543219157613GNDSCLKSHIFT+5VGNDAD15AD14AD13AD12AD11AD10AD9AD874HC166M141211105432191576IC50713IORIOWRDWRHOLDACSDMARESETNDMAHOLDEOPDMAREADYDMAREQ1312 11 /DMAHLDA2 1374HC02M74HC04M43IC19BR508R509 82C37A36EOP25DMAACK19SHIFT2418DREQ11417DREQ21516DREQ313RESET12DMACLK11CSDMA10DMAREQ98ADSTB7DMAHLDA6SHIFT4WR3RD2IOW1IORIC50821 AD15D7 22 AD14D6 23 AD13D5 26 AD12D4 27 AD11D3 28 AD10D2 29 AD9D1 30 AD8D040 A8A7 39 A7A6 38 A6A5 37 A5A4 35 A4A3 34 A3A2 33 A2A1 32 A1A0R510EOPDACK0DREQ0DACK1DREQ1DACK2DREQ2DACK3DREQ3RESETCLKCSHREQAENADSTBHLDAREADYMEMWMEMRIOWIOR3D3D2DRM111C31C21SRG83D3D2DRM11C31C21SRG8IC504DDDDDDDDOE74HC574MCLKIC510AD7AD6AD5AD4AD3AD2AD1AD0IC509D&74HC00M1IC17AGND GND+5VR50011C500 – C509+5VGNDCTTL'SHIFT+5VSHIFT+5V74HC163M[8] 116 [4] 125 [2] CLK/4134 [1]1D CLK/21435CT=01 G47 3CT=15G3 1510 M29 2C1/G52.3.4+2CTR4IC506R504R505R506R507IC509C9 8PCLK 10174HC32MIC503CIOW 10 8DMAACK 974HC74MR13+5V 8C1>11 1D12 9S10 IC502BDMACLKCLK/4+5V74HC163M[8] 116 [4] 125 [2] 134 [1]1D 1435CT=01 G47 3CT=15G3 1510 M29 2C1/G52.3.4+2CTR4GND&PCLKIC509B4 65 &74HC00MPCLKSCLKIC503D12 1113 174HC32MR501R502R503IC503B4 65 174HC32MIC512A1 32 &74HC08MIC512B4 65 &74HC08MIC17D11 1312 174HC02MEN-DOUBLE CLK/4CLK/8
