Ink Jet Printer - Sharp UX-A1000 Service Manual

[2] Ink jet printer

1. Engine specifications
1) Mechanism
Resolution: 600dpi x 600dpi addressability
Print speed: 4PPM text with black cartridge
Print swath: 8 inches
Duty cycle: 250 pages per month average
Dimensions: 330mm x 100mm x 130mm
Weight: 1.98punds(900g)(1p=453g)
Acoustics: 50db in letter quality mode
2) Electrical
No electrical hardware included with the type B engine except for
the carrier drive stepping motor, the Sensor FPC assembly which
includes a photo interrupter for sensing home position,the carrier
cables, and the printhead cable.
2. Abbreviations
EOF End-of Form
ESD Electrostatic Discharge
FRU Field Replaceable Unit
HVPS High Voltage Power Supply
LVPS Low Voltage Power Supply
OEM Original Equipment Manufacturer
POST Power-On Self Test
V ac Volts alternating current
V dc Volts direct current
ZIF Zero Insertion Force
3. Diagnostic information
1) Print Cartridge
Black Print Cartridge 208 Nozzles
Pigment based(Water proof)
initial cartridge
Approx.yield 300 letter pages at 4%coverage
Replacement cartridge:SHARP UX-C70B
Approx.yield 600 letter pages at 4%coverage
* When Ink Save mode is enabled.
2) Start
Power-OnSelf Test (POST) Sequence
When you turn the printer on it performs a POST. Turn the machine
on and check for a correct POST operation by observing the
following:
1. The carrier moves.
2. The paper feed gears turn.
3. After 30 seconds the carrier moves over the maintenance station
and caps the printhead.
4. All motors stop.
4. Circuit description
1) General description
The compact design of INK PWB is obtained by using Head Driver
IC and Home position Sensor.
2) Electrical System
The PWB provides mechanical control for Ink Jet Printer.
Fig. 1 shows the interconnection of PWB and other electrical
component in the print mechanism.
Photo Sensor
FPC
To
FFC
Printer PWB
Fig. 1
3) Electrical Overview
The information in this section appears in a sequence relative to
the system diagram in the following figure.
Printer PWB
4) Power Supply Connector
The mechanism requires two voltages (+3.3V, +11.82V and +24V).
These three voltages supplied from CNHEAD connector.
5) Host interface connector
FFC on the INK PWB provides 23 lines from the host unit, for
control of various operating options available to the host.
The two primary functions of the host interface are:
Printing data for the Ink Jet Printer
Error status to the host
6) Driver IC
One driver IC drive 208 (MONO) nozzles on the cartridge.
This driver IC, located on the INK PWB, also connected back to the
ASIC, on Printer PWB.
7) INK Cartridge Carriage
The carriage connects via a FPC on the INK PWB.
The ink cartridge contacts connect to the carriage contacts.
The ASIC controls the carriage and ink cartridge.
8) Home Position
Measure the position of the carrier unit by reading the scale of the
encoder ( in the figure) with the photo sensor (
1
When power is supplied, the carrier unit moves right until it contacts
the dead-end of the right main frame (
home position and hereinafter, regard as the starting point to
measure the position of the carrier unit by reading the scale of the
encoder with the photo sensor. The home position shall be applied
to all operations.
3 – 3
UX-A1000U
Driver
Sensor
Home Position
Fig. 2
in the figure).
2
in the figure). We call this
3
2
1
Fig. 3
Head
3