SHARP SF2218
Manual de Servicio

2-4. Copy density adjustment A. When the copy density adjustment is required:
The copy density adjustment must be performed in the following cases:

(2) Drum sensitivity setting
(1) Execute Sim. 26-07, and check that the top digit of the 9-digit drum number printed on the flange in front of the drum is displayed on the copy quantity display. If the displayed number is different from the drum number, change the setting with the 10 digit key pad.

(2)

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When maintenance is performed. When the output current of the main charger and the transfer charger, the separation charger bias voltage, or the grid voltage is adjusted. (When the charger unit or the high voltage unit is replaced.)

(Note) When the 10 digit key pad is used to enter a number, the display shows only in the range of 1 � 3.

(3) AE sensor level adjustment
(1) Execute Sim. 47. (The mirror base starts scanning and stops at the AE sensor level measurement position.) Put several sheets of A3 (11" x 17") paper on the original table. Press the PSW again, and the copy lamp will light up and the sensor output will be displayed on the copy quantity display. This output level is stored.

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When the developing bias is adjusted. When any part of the AC PWB unit is replaced. When the AE sensor is replaced. When the copy lamp is replaced. When the optical unit is replaced. When the optical unit is disassembled, repaired, or adjusted. When exposure adjustment plate is moved. When the drum is replaced. When the main PWB is replaced. (2) (3)

B. Note for copy density adjustment � The charger output and the developing bias
adjusted in advance.

voltage are properly

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The half-tone uniformity is within the limit sample range. Sim. 44-01 is set to "7."

C. Copy density adjustment procedure
(1) Set the automatic exposure level to "3."
(When the mode select key is pressed for 5 sec in the photo mode, the mode is switched to the automatic exposure mode. In this mode, press the exposure select key to set the exposure level to "3.")

COPY DENSIty
AUTO

Put several sheets of A3 (1" x 17") paper

MANUAL PHOTO

1 234 5
LIGHT DARK

7 � 16