253DP-8032/80252008Ver. 1.27.4. Adjustment7.4.1. Toner Density Control (TDC) Adjustment1. Press the “FUNCTION”, “ORIGINAL SIZE (LEDGER/A3)”, and the “3” keys simultaneously.2. Input the Password, and select the “OK” button to enter the Service Mode (default password is00000000).3. Press the “8” key, and press the “START” key to enter the F8 Service Mode (Service Adjustment).4. Select the “ ” button, and select “09 Toner Density Adj”.5. Press the “START” key to begin the automatic TDC sensor gain adjustment.Note:Do not touch any keys, or turn the Power Switch OFF until the adjustment cycle stops(approximately 8 minutes). Refer to the Sequence Chart below.7.4.2. Black Density Sensor Output Gain Adjustment1. Select the “ ” button, and select “14 Black Density Gain”.2. Press the “START” key for automatic Black Density Sensor Output Gain adjustment.Note:Do not touch any keys, or turn the Power Switch OFF until the adjustment cycle stops(approximately 1 minutes). Refer to the Sequence Chart below.3. Press the “STOP” key.4. Press the “6” key, and press the “START” key to enter the F6 Mode (Adjust Parameters).5. Write the contents of F6-21, 26, and 65 on the memory sheet (included inside the 1st Paper Tray).F6-21 : TDC Gain VoltageF6-26 : TDC Judgement LevelF6-65 : Black Density Reference6. Press the “STOP” key.7. Press the “FUNCTION”, and the “C (CLEAR)” keys simultaneously to exit the Service Mode.7.4.3. Set the Date, Time, and Language1. Press the “FUNCTION” key.2. Select “GENERAL SETTINGS”.3. Select “ ” button, and select “09 Key Operator Mode”.4. Enter the 8 character Code (default is 00000000), and the "OK" button.5. Select the “OK” button.TDC AdjustF8-09 (Installation & Developer replacement)QUANTUM II7 min within 30 secAutomaticallyGain Adjust QUANTUM IIF8-14 (Installation & OPC / Black Density Sensor replacement)within 30 sec within 30 secAutomatically