Brilliant! The worst case for my poorly aligned jumper block is that SDA and Vcc might touch each other, but it doesn’t matter because it’s a perfectly legal hookup (just not communicating)! When reversed, SCL is set to low (Ground), SDA is pulled up to Vcc while there is no power supply, so no damage is done. My guess is that it’s a good design to put the Vcc next to Ground on one side instead of making it symmetric so the polarity can be reversed. You might be worried about shorting into the next pin or hooking something up in reverse damaging the chips, but luckily the chips survived. See pictures here: Can press the pins down by using jumpers Since I don’t have cheap pogo pins lying around, I took the 2.4mm pitch (the standard size used in PC, Arduino and Raspberry Pi) jumper block I have (so all pins are set at equal lengths to make simultaneous contact) and hope somehow there’s 4 pins that kind of align with the contact, and it did. Please remind me in the comments section if you find out who should I credit it to. Sudo i2cdetect -y 1 Sorry I forgot where I got this image from.
RICOH SP C250DN TONER RESET HACK INSTALL
While looking for the pinouts ( ), I discovered a useful tool called i2cdetect that allows me to find out the address of the chips which means I can write a program automatically figure out the right image to load to the chip without looking: sudo apt-get install i2c-tools The electrical pins we need is clustered on to top left, Pins 1 (3.3V), 3 (I2C SDATA), 5 (I2C SCLK), 9 (Ground)
RICOH SP C250DN TONER RESET HACK CODE
I am using a Raspberry Pi Zero W so the chip is BCM2835 instead and I can use 100Kbps/400KBps instead of 9600 baud as in the original code If toner gets into the eyes, flush the eyes with cold running water or eye wash.This is based on the Raspberry Pi implementation of the Toner chip reset:.If toner gets on the skin, wash immediately with soap and cold running water.If there are signs of irritation or other problems, seek medical attention. If toner is inhaled, immediately gargle with large amounts of cold water and move to a well ventilated location.Work carefully when removing paper jams or replacing toner bottles or cartridges to avoid spilling toner on clothing or the hands.Used NVRAM must be handled in accordance with local regulations. The manufacturer recommends replacing the entire NVRAM. Replace the NVRAM only with an identical one. The NVRAM on the system control board has a lithium battery which can explode if replaced incorrectly. This machine and its peripherals must be serviced by a customer service representative who has completed the training course on those models.Ģ.
Observance of Electrical Safety Standardsġ. Therefore, the machine must be installed in a well-ventilated room. High ozone density is harmful to human health. This machine, which uses a high voltage power source, can generate ozone gas. If unsuccessful, get medical attention.Ģ. Immediately wash eyes with plenty of water. Toner and developer is non-toxic, but if you get either of them in your eyes by accident, it may cause temporary eye discomfort.