Xerox 4400DX - Phaser B/W Laser Printer Service Manual

Also see for 4400DX - Phaser B/W Laser Printer: Specification sheet

Contents

1-10 Phaser 4400 Laser Printer Service ManualImage Processor BoardThe following components must be transferred from the old board when installing anew Image Processor Board in the printer: SDRAM DIMMs (Slot 1 on the left, slot 2 on the right) NVRAM Configuration Upgrade Chip Flash DIMMSee RRP 9.2 Image Processor Board on page 6-88 for information on replacing theImage Processor Board.Inside the printer on the Image Processor board are four LEDs shown in the figure.DS210 illuminates when the e-net rate is set to 10 Mbits/sec (off indicates100 Mbits/sec).DS211 illuminates when a link is established.DS380 is the HEALTH LED. The CPU flashes this LED to indicate that it is ìaliveî,or in the case of a failure, the CPU flashes this LED (and the Front Panel LED, also)with a code to help diagnose the problem.DS390 is the CHECK STOP indicator, which illuminates when various fatal errorsoccur in the CPU.