Sharp PC-1211 Service Manual

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L_ VM -------IV ...._ __ - - - --- - 2.8V 6.8ms---- VA -- --- ov ...._ __ - - - --- -I.8V 11 Eye position 30° o Adjustments of reference voltage VD ISP The VDISP had been precisely adjusted to become -3.74V at an ambient temperature of 20°C and -4.29V at 0°C. In case there is a need of readjusting the voltage after servicing the LCD or exchanging some of power source components, be sure to look on the LCD from 30° of angle from the vertical line while adjusting the pot. :D. mi- Low side voltage of common signals (Hl-H7) for LCD. High side ...

43 Sl2 Out Expansion signal -~ During display: Low Depression of the CA (ON) key causes an instant pulse generation. 49 S6 Out For DEF symbol display (engaged: low, not engaged: high) 54 Sl Out For symbol display (SHIFT, DGE, RAD, GRAD, RESERVE, PRO, RUN) Same waveform as the segment signal. 55 Kil In CPU I Busy signal (High during the execution in CPU I) (Sl6a) 56 K.i2 In Expansion signal To be connected to Sl 2 (CPU II) for PC-1211. 57 K.i3 In Printer Busy signal Low when the priner is not operated. 58 K.i4 In P ...

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