Toshiba e-Studio 202S

A. Copy density adjustment timing

The copy density adjustment must be performed in the following cases:

• When maintenance is performed.
• When the developing bias/grid bias voltage is adjusted.
• When the optical section is cleaned.
• When a part in the optical section is replaced.
• When the optical section is disassembled.
• When the OPC drum is replaced.
• When the main control PWB is replaced.
• When the EEPROM on the main control PWB is replaced.
• When the memory trouble (U2) occurs.

B. Note for copy density adjustment

1) Arrangement before execution of the copy density adjustment
• Clean the optical section.
• Clean or replace the charger wire.
• Check that the voltage at the high voltage section and the developing bias voltage are in the specified range.

C. Necessary tool for copy density adjustment

• KODAK GRAY SCALE (Test chart)
• B4 (14" x 8-1/2") white paper
• The user program AE setting should be "3."

D. Features of copy density adjustment

For the copy density adjustment, the image data shift function provided in the image process LSI is used.

List of the adjustment modes

Auto Mode	Brightness 1 step only
Manual Mode	Brightness 5 steps. Adjustment of only the center brightness is made.
Photo Mode	Brightness 5 steps. Adjustment of only the center brightness is made.
Manual T/S mode	Brightness 5 steps. Adjustment of only the center brightness is made.
T/S Auto mode	Brightness 1 step only

E. Copy density adjustment procedure

Use SIM 46-1 to set the copy density for each copy mode. For selection of modes, use the copy mode select key.

(1) Test chart (KODAK GRAY SCALE) setting

1. Place the test chart so that its edge is aligned with the A4 (Letter) reference line on the document table. Then place a A4 (14" x 8-1/2") white paper on the test chart and close the document cover.

(2) Perform the adjustment in each mode.

1. Execute SIM 46-1.
2. Select the mode to be adjusted with the exposure mode select key. Set the exposure level to 3 for all adjustment. (Except for the auto mode.)

   Adjustment mode	Exposure mode display lamp	Gray chart adjustment level
   Auto mode	Auto lamp ON	"3" is slightly copied.
   Manual mode	Manual lamp ON	"3" is slightly copied.
   Photo mode	Photo lamp ON	"3" is slightly copied.
   Manual T/S mode	Manual lamp/Photo lamp ON	"3" is slightly copied.
   Auto T/S mode	Auto lamp/Photo lamp ON	"3" is slightly copied.

3. Make a copy. Check the adjustment level (shown in the above table) of the exposure test chart (KODAK Gray Scale).

(When too bright): Decrease the value displayed on the copy quantity display.
(When too dark): Increase the value displayed on the copy quantity display.
* The value can be set in the range of 1 - 99.