Xerox COLORQUBE 8870 Service Manual

October 2012
8-13
ColorQube 8570/8870 Service Manual
Printer Electronics
Theory of Operation
Xerox Internal Use Only - Revised, 3rd Revision
FPGA
The FPGA is the Printhead interface and motor controller for the ColorQube 8570/8870 printer.
Figure 9 illustrates the Block Diagram for FPGA.
Figure 9 FPGA Block Diagram
Motors
Y-Axis Motor
The Y-Axis Motor is a DC Motor with an encoder that is used to turn the Drum. The Power Con-
trol Board drives the Y-Axis Motor with an H-bridge transistor configuration. An H-bridge config-
uration is used so the Motor can turn in both directions.
Process Motor
The Process motor is a DC Motor with an encoder that is used to turn the Drum. The Power
Control Board drives the Process Motor with an H-bridge transistor configuration. An H-bridge
configuration is used so the Motor can turn in both directions.
Media Path Motor
The Media Path Motor is a DC Motor with an encoder that is used to turn the paper feed mech-
anism. The Media Path Motor also move the head wipe when the Head Maintenance Clutch is
engaged. The Power Control Board drives the Media Path Motor with an H-bridge transistor
configuration. An H-bridge configuration is used so the Motor can turn in both directions.
X-Axis Motor
The X-Axis Motor is a current controlled stepper motor. The Power Control Board drives the X-
Axis Motor with two H-bridge transistor configurations one for each phase.
Elevator Motor
The Elevator Motor is a DC motor used to raise the paper to the pick. The Power Control Board
drives the Elevator Motor with the +12V coming from the power supply. The Elevator Motor is
current limited to 112mA. It has a brake that shorts both motor leads. This prevents the motor
from coasting and brings the motor to a more precise stop. The Elevator motor and the Brake
have a lock out in the PLD to prevent both from being activated at the same time, which would
cause a shoot through condition that would damage the drivers.
Fans
Electronics Fan
The Power Control Board drives the Electronics Fan by providing 12V, ground and sending a
3.3V pulse to the Fan to turn the Fan on. This allows the Fan to be pulse width modulated to
reduce the speed of the Fan, by reducing the effective voltage.
Drum Fan
The Power Control Board drives the Drum Fan by providing 12V to one side of the Fan and
switching the ground on the other side. This allows the Fan to be pulse width modulated to
reduce the speed of the Fan, by reducing the effective voltage.

Xerox COLORQUBE 8870 Specifications

General

Wi-Fi	-
Network ready	Yes
Security algorithms	HTTPS, SSL/TLS
Print technology	Laser
Maximum resolution	2400 x 2400 DPI
Time to first page (black, normal)	5 s
Print speed (black, normal quality, A4/US Letter)	40 ppm
Maximum duty cycle	120000 pages per month
Recommended duty cycle	15000 pages per month
Page description languages	PCL 5c, PostScript 3
Maximum internal memory	2048 MB
Sound power level (standby)	24 dB
Display	LCD
Certification	EMC Directive 2004/108/EC, FCC Part 15, Class A, Low Voltage Directive 2006/95/EC, RoHS Directive 2002/95/EC
Total input capacity	625 sheets
Total output capacity	350 sheets
Maximum input capacity	2200 sheets
Envelopes sizes	C5, DL
Maximum print size	216 x 356 mm
Media weight (tray 1)	60 - 220
Paper tray media types	Bond paper, Card stock, Coated paper, Envelopes, Glossy paper, Labels, Photo paper, Plain paper, Recycled paper, Transparencies
Paper tray media weight	60 - 220 g/m²
Non-ISO print media sizes	Executive (184 x 267mm), Legal (media size), Letter (media size), Statement (140 x 216mm)
ISO A-series sizes (A0...A9)	A4, A5, A6
JIS B-series sizes (B0...B9)	B5
Multi-purpose tray media types	Bond paper, Business cards, Envelopes, Greeting cards, Heavyweight paper, Labels, Letterhead, Plain paper, Recycled paper, Transparencies
Maximum ISO A-series paper size	A4
Standard interfaces	Ethernet, USB 2.0
Optional connectivity	Wireless LAN
USB 2.0 ports quantity	1
Mac operating systems supported	Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard
Server operating systems supported	Windows Server 2003, Windows Server 2008
Windows operating systems supported	Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	107 W
Power consumption (printing)	252 W
Power consumption (PowerSave)	47 W
Package weight	35811 g
Storage temperature (T-T)	-30 - 60 °C
Operating temperature (T-T)	10 - 32 °C
Operating relative humidity (H-H)	10 - 80 %
Depth (imperial)	20.5 \
Width (imperial)	16 \
Height (imperial)	14.5 \
Networking features	Gigabit Ethernet
Networking standards	IEEE 802.1x
Minimum storage drive space	160 GB
Compatible operating systems	HP UX 11, HP UX 11i, Linux, Mac OS 10.5+, Solaris 10, Solaris 9, Windows 2003 Server, Windows 2008 Server, Windows 7, Windows Vista, Windows XP, Windows XP Pro

Weight and Dimensions

Depth	521 mm
Width	406 mm
Height	368 mm
Dimensions (WxDxH)	406 x 521 x 368 mm