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Ericsson GA628

Front
Front

Here is a phone from the mid 90s, the Ericsson GA628. Here visible is the front of the unit with keypad, & single line monochrome LCD for number display.

Battery & Rear
Battery & Rear

Here the battery is removed from the phone, showing the SIM card socket. At the top under the antenna stub is the socket for an external antenna.

Front Removed
Front Removed

Here the front is removed from the phone, PCB on left, rear of keypad on right. Microphone is at bottom of keypad, with speaker at the top. Top right of the PCB is the ringer buzzer, left is shield for RF amplifier.

Main PCB
Main PCB

Here is the back of the main PCB, RF sections on left & centre. Processing & memory on right.

Battery
Battery

This phone had a Ni-Mh battery, before Li-Ion batteries were introduced.

LCD
LCD

The LCD from the front of the phone is shown here. A simple dot matrix single line unit.

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HP Photosmart 375

Top
Top

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

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
Cartridge Door

Here the cartridge door is open. Takes HP 95 Tri-Colour Inkjet Cartridge.

Battery Compartment
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
Bottom Label

Specifications label.

USB + Power
USB + Power

Power adaptor & USB connection for PC use.

Paper Tray
Paper Tray

Rear door opened. Showing the paper feed tray.

Paper Feeder
Paper Feeder

Rear door has been removed in this shot. Paper feed roller & platen roller can be seen here.

Rear Cover Paper Feeder
Rear Cover Paper Feeder

Paper holder attached to rear door.

Top Cover
Top Cover

Bottom of the top cover, with connections for the buttons & LCD panel.

Main PCB
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

Rear shell has been removed here. Showing the main frame & the carriage drive motor on the left.

Carriage Drive
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

Main drive motor, feeds paper, drives rollers, operates cleaning mechanism for the inkjets.

Shaft Encoder
Shaft Encoder

Mainshaft encoder. Main drive motor is bottom right hand side with timing belt drive.

CPU
CPU

Closeup of the CPU. This is a Phillips ARM chip, unknown spec.

Card Reader Sockets
Card Reader Sockets

Detail of the card reader sockets, this unit takes all current types of Flash memory card.

HP 95 Tri-color Inkjet Print Cartridge
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Hair Dryer

Housing
Housing

This is a 1500W hairdryer, death caused by thermal switch failure.

Switch
Switch

This is the switch unit. Attached are two suppression capacitors & a blocking diode. Cold switch is on right.

Heating Element
Heating Element

Heating element unit removed from housing. Coils of Nichrome wire heat the air passing through the dryer. Fan unit is on right.

Thermal Switch
Thermal Switch

Other side of the heating element unit, here can be seen the thermal switch behind the element winding. (Black square object).

Fan Motor
Fan Motor

The fan motor in this dryer is a low voltage DC unit, powered through a resistor formed by part of the heating element to drop the voltage to around 12-24v. Mounted on the back of the motor here is a rectifier assembly. Guide vanes are visible around the motor, to straighten the airflow from the fan blades.

Fan
Fan

5-blade fan forces air through the element at high speed. Designed to rotate at around 13,000RPM.