HP FAX-750 Service Manual - Page 149

3.14 Document Draw Adjustment After replacement of the main PCB or CIS, or if data stored in the EEPROM is damaged, you need to carry out this procedure by using the TC-027 chart. n Function This function adjusts how much the document is drawn in, starting at the point when the document rear sensor is turned on until the leading edge of the document reaches the scanning start position. n Operating Procedure (1) In the initial stage of the maintenance mode, set the TC-027 chart on the document stacker. The message "DOC. READY" appears on the LCD. (2) For FAX750/FAX770/FAX870MC/MFC970MC: Press the Function key. For FAX-910/FAX-920/FAX-921/FAX-930/FAX-931/MFC-925: Press the Menu key. The equipment beeps and draws in the TC-027 chart to the scanning start position. While drawing it in, the equipment counts patterns on the chart to determine the amount of draw. Upon completion of normal counting, the equipment shows the message "COPY P.01 SUP" on the LCD and begins copying the TC-027 chart. The message "REAR SENSOR IS ADJUSTED." and the copied image will be printed out on recording paper as shown below. If any error occurs during counting, the message "MACHINE ERROR AB" appears on the LCD, with no copying of the TC-027 chart onto the recording paper. However, only the message "REAR SENSOR IS ADJUSTED." will be printed out. Printout after Normal Completion of Document Draw Adjustment V - 56