I got HP deskjet d1560 printer. Of course I had to look what components are inside and how does it work. Surprisingly, it did not have much electronics inside. Probably common characteristics of this kind of printers. Screws seemed to be ~torx 10. I used t10 bit to unscrew components.
I did not know before that inc printers like this don’t have stepper motors inside. They have optical feedback band/tape instead which runs trough sensors and powered by DC motors. Basically it has 2 DC motors and 3 optical (IR speed) sensors.
It comes with stand alone DC power supply adapter with 2 output voltages. These are:
Currently I use that 32V part to drive 2 of my 10W power LEDs for my lightbox project. This adapter has thermal shutdown and also it has short circuit protection (If I remember right I have accidentally shorted it). My 2 LED’s make it to shut down within 15 minutes due to overheating. I removed its protective plastic case and now that problem went away since it has better ventilation now.
Photos of this deskjet d1560 printer
Here are some photos I took while disassembling.
HP deskjet D1560 printer overview with lid open
Now with cover off
Printinghead linear rail removed
HP deskjet D1560 printer printinghead closer look
Main board electronics
HP deskjet D1560 printer main board electronics closer
Gears on other side
Main DC motor
Backside, power and USB connectors
HP deskjet D1560 printer adapter 32v and 16v
Power supply inside
Power supply inside, PCB backside