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At power up or in an idle condition, this value should be in the range of 060 to 065. A reading of 175 is high and could decrease the life of the printhead. An average amount of printing will give readings that range from 070 to 120. Pot -this reading comes from the darkness potentiometer located on the front panel board. It will vary from 000 (darkest) to 255 (lightest). Adjust this value for a midrange value of 128. TOFA -(Top of Form Adjustment) determines where the first position of print be