I would like to present the tear-down of a Panasonic digital cordless phone with a base unit and handset
The initial breakdown only required popping off the handset battery cover (a) and using a Philips screwdriver to take out screws from the back covers
The front and back covers of both devices required just a flathead screwdriver to separate.
Initial view of the internals
Starting with the base unit, I first detached the motherboard using wire cutters, although one could use a desoldering wire as well.
The motherboard:
Front
Back
Directly below the motherboard was a button board that contains button contacts over which the button pads sit. I removed the screws to free the button board and charging dock.
There are three additional parts that were initially attached to the motherboard:
- RJ11 Phone socket
- DC Power Jack
- Speaker
Next up, the handset!
I used wire cutters to free the motherboard from the back speaker, which was held down by a plastic part that twists off.
I then removed the screws attaching the motherboard to the front cover and took the battery contacts and charging contacts off.
Here are some of the parts I identified right away:
- Motherboard
- Button pad
- Battery contacts
- Charging contacts
- YD2052-72 Loudspeaker
From the front of the motherboard:
- Speaker
- Monochrome LCD Display Module
- Electret Microphone
Some additional parts from the base unit:
- Top cover
- Back cover
- Charging port
- Button pad frame
- Button pad
- Button pad
- “Play” Button pad
My Findings
In the process of completing this tear-down, I noted that the handset back speaker and base unit speakers were attached using a plastic piece that twists off easily. I am interested in learning why these particular components were not secured using screws as the other parts were. I also found it rather difficult to identify the smaller components on the circuit part without a deeper understanding of electronics, so I’m eager to gain the knowledge to improve on this later on.