# BEFORE REPAIR OPERATION [B91] (INK SUPPLY UNIT)

1. Start service support mode.
   • Service mode startup and operating procedures
2. Select “Adjustment Main Unit: MENU” from the service support mode top menu.

3. Select “Ink Supply Unit: MENU” - “Before Repair Operation”.

   Check Point / チェックポイント

   Select and execute the corresponding adjustment item using either procedure below.

   • Selecting by entering the program number
   1. Select “Input B No.-Main Unit Adjust” from the Adjustment menu.
   2. Press the [#] button and software number key is displayed on LCD. Enter programnumber “91”.
   3. Press the [#] button.
   • Selecting from menu
   1. Select “Main Parts Adjust: MENU” from the Adjustment Main Unit menu.
   2. Select “Ink Supply Unit: MENU” from the Main Parts Adjust menu.
   3. Select “Before Repair Operation” from the Ink Supply Unit menu.
4. The Head Ink Discharge is executed.
   • INK DISCHARGE [HEAD INK DISCHARGE: C08][SUPPLY INK DISCHARGE: C09][INK SYSTEM INK DISCHARGE: C10]
5. Check that in the following is displayed and then press the power button to turn off the power. (The power turns off in the CR unlock state.)