System Error Codes Boot-Up Error: USB Register ( 0400 ) Problem Description: The read/write of the USB controller on the Main PCA was diagnosed and an error was detected. Corrective Action: Try the following: „ Replace the Main PCA ⇒ Page 8-35 . Boot-Up Error: Power Supply (+36V, +24V, +12V) ( 0800 ) Problem Description: The power supplies of +36, +24 and +12 V were diagnosed and could not be detected. Corrective Action: Try the following: „ Open the Electronics Cover and check LED 11 and LED 13. „ If both LED 11 and LED 13 are OFF, then try the following: – Check the Interlock Switches to make sure they are installed/connected correctly.
Make sure that the Rear Cover lips (that activate the Interlock Switches) are not bent and that the Rear Cover is closed correctly. – If the Interlock Switches are installed and connected correctly, then replace the Main PCA ⇒ Page 8-35 . „ If both LED 11 and LED 13 are ON, then try the following: – Check whether the correct voltages are supplied from the power source (refer to the table below). If the correct voltages are not supplied, then replace the Power Supply Unit ⇒ Page 8-43 . – It is possible that this error occurred because of a faulty Main PCA. Replace the Main PCA ⇒ Page 8-35 . – Check whether the motors have been short-circuited by testing +24 V.
If +24 V is not supplied then replace both Scan-Axis/Paper-Axis Motors. If error continues, replace the Main PCA. 2-6 HP Designjet 9000s Series Printer Service Manual Power Line Measuring Position (on the Main PCA) Normal Value +1.5 V TP70 +1.45 V to +1.55 V +3.3 V TP69 +3.20 V to +3.40 V +5 V REF TP36 +4.90 V to +5.10 V 5 V TP35 +4.75 V to +5.25 V +12 V TP50 +11.00 V to +13.00 V +24 V TP34 +23.00 V to +25.00 V +36 V TP93, TP33 +35.00 V to +37.00 V