This is a device designed to reset Epson brand ink cartridges that are reportedly out of ink, so they again report full to the printer Here is the front of the unit, with the guide for attaching to a cartridge.
PCB Back
Back of the device removed. 3 button cells provide power to the PCB. Indicator LED sticks out of the top of the device for reset confirmation.
Row of pads on far left edge of the PCB are presumably a programming header for the uC on the other side of the board.
PCB Front
Here is the front of the PCB, main feature being the grid of pogo pins to connect to the cartridge chip. IC on lower right of that is a MSP430F2131 uController, a Texas Instruments part.
The IC directly to the left of the pogo pin bed is a voltage regulator, to step down the ~4.5v of the batteries down to the ~3.3v that the uC requires.
This is a HP PhotoSmart 375 portable photo printer. With built in card reader, screen & PictBridge.
Top of the printer showing the UI Buttons & Screen.
Front
Front of the unit, card reader slots at the top, Pictbridge USB connector at top left. Paper out slot at bottom. Cartridge door is on the right.
Cartridge Door
Here the cartridge door is open. Takes HP 95 Tri-Colour Inkjet Cartridge.
Battery Compartment
Battery compartment on the bottom of the unit. A Li-Ion battery pack can be installed here for mobile photo printing.
Bottom Label
Specifications label.
USB + Power
Power adaptor & USB connection for PC use.
Paper Tray
Rear door opened. Showing the paper feed tray.
Paper Feeder
Rear door has been removed in this shot. Paper feed roller & platen roller can be seen here.
Rear Cover Paper Feeder
Paper holder attached to rear door.
Top Cover
Bottom of the top cover, with connections for the buttons & LCD panel.
Main PCB
This is the main PCB of the unit. Controls all aspects of the printer. CPU in center, card reader sockets are along bottom edge. various support circuitry surrounds the CPU.
Rear
Rear shell has been removed here. Showing the main frame & the carriage drive motor on the left.
Carriage Drive
Closeup of the carriage drive motor & timing belt system. All the motors in this printer are DC servo motors, not steppers.
Main Drive Motor
Main drive motor, feeds paper, drives rollers, operates cleaning mechanism for the inkjets.
Shaft Encoder
Mainshaft encoder. Main drive motor is bottom right hand side with timing belt drive.
CPU
Closeup of the CPU. This is a Phillips ARM chip, unknown spec.
Card Reader Sockets
Detail of the card reader sockets, this unit takes all current types of Flash memory card.
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