Some of the print heads are from functional printers, some are from defunct printers kept for spares, some are from printers under repair. I collect good old Canon printer models. I have found several printers in electronic waste containers, at flee markets and thrift stores. I have also bought some defunct printers cheaply from colleagues and got some for free from family and friends. I have been able to repair several printers others had given up on. The only Canon printer I bought at a store at regular price is the iP4200, when it was introduced.
Here is a list of my Canon printers.
Fully functional iP's 2700, 3600, 4000 x2, 4200, 5200, 6600D. Under repair iP 4300. Defunct, kept for spares iP 3000, 4000 x3, 4200, 5000, 5200R
Fully functional MP's 280, 540 x2, 970. Under repair MP110. Defunct, kept for spares MP610.
I will post my scans soon - but may I ask what this image of the contacts is good for?
When I had a defective qy6-0075 a few weeks ago I really needed a correct extended nozzle check of this printhead for comparison.
Also a scan of the nozzle rows could be interesting if you can further explain which row is for which color.
And if you are not able to unclogg a canon bubble jet by external cleaning, even repeatedly, IMO you have to renew it because in most cases nozzles are damaged or burnt...
I would like to build kind of free database in order to make easier diagnostic of printheads.
Some bad short circuits can be verified with multimeter without a need to put possibly damaged printhead to the printer.
One thing is very interesting - it is not necessary to know exact pinout of certain printhead connector in order to find critical pins.
Most vital pins are:
-> HV+ and HV- (mainly 24V)
-> LV+ and LV- (most likely 3V)
and they can be distinguished visually, especially if you know "habits" of engineer who designed the printhead.
Most times pinouts taken from service manuals aren't OK and have to be verified. Picture of connector can reveal most obvious flaws (or misinformation).
Nozzle checks are very good things especially combined with good quality pictures of nozzle plates. In combination with informations from service manuals, they can reveal nozzles layout.
I would introduce them, but think pictures of connectors are first thing to start from.
Most likely only difference is EEPROM data - it is the reason of "incompatibility" between older printhead and newer printer.
Electronic specialist should be able to copy EEPROM data from one printhead to another.
In my country someone was able to reset EEPROM data from PF-03/PF-04 printhead, so "lesser" printheads are also able to be "refurbished".
I am having problems with my iP4500 (it powering itself off, abruptly).
Here is a cell phone picture of the system interface side of the print head.
At first glance I notice the five pads which are the same node, upper-right in this picture.
So are those one of the DC rails, or are they ground?
This is a QY6-0067 ... I believe that part QY6-0075 is equivalent(?) to it, as well.