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The Hp 2225a ThinkJet InkJet printers are really very nice, compatible with many Hp instruments and provide easy screen/data printout directly from the instrument, often with the push of just one Hp button on the instrument.
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Much criticism of the 2225 has been directed at the "leaking" cartridge & corrosive ink.
-- But really this can be managed by removal of the cartridge (when not printing for long periods of time), storing it in a small
??????? Rubber? Maid type container, and periodic cleaning of spilled ink.
Otherwise, the Hp ThinkJet technology is superb, and a 1st for Hp of that era (ca. 1984).
( For fun, and amazement, read the Hp Journal May 1985 describing the development of the Hp ThinkJet, and peek at one of the developers stories in Hp Measure magazine, I will dig up that reference later ).
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Several frequent breakdown issues occur with the Hp 2225a HP-IB inkjet printer:
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A]
The Print Head electrode contacts frequently become corroded due to prolonged contact soaking in the corrosive Ink; where either the contacts themselves become corroded Or the contact-flex cable juncture develops a micro-crack, causing some of the 12 print head "character" nozzles? to not function ( non printing ).
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A1]
A repair can be had by following the excellent Repair Log "Fixing the ThinkJet" , by Martin Hepperle, September 2016.
( a .pdf is now in the Hp 2225 File Section herein ). One needs to buy an Hp Q7453a Carriage Assembly to do this.
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A2]
Flex head electrode cracks can be repaired with Silver (Ag) paint ( Silberleitlyck 3gm Art No.: 530042 ),
? as described in the below YouTube video
by atkelar:
? ? ?{ Note this YouTube provides a guide for complete disassembly & reassembly of the 2225a? HP-IB printer }
https://www.youtube.com/@atkelar
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B]
The Hp 2225 can fail to turn on Or suffer from a Mains power receptacle Rifa-type filter death (or short),?
which recently happened to me.? This repair is also covered, and rebuilt, by atkelar, in his YouTube video.
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C]
PS recapping.? This also happened to my 2225a printer, & also covered by atkelar.
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Note:
? atkelar described using an older NOS 51604a Print cartridge, expired 5 yrs earlier,
printed well, with good results !
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TonyG?? has provided an excellent alternative Hp 2225a repair with a YouTube video swapping the whole front print section including the Carriage Assembly from a 2225 parts mule:
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I bought a broken one to use for parts and one of the things I was
secretly hoping was that the flex circuit would be bad so I would have the excuse to rip it out and make a set of duplicate gerbers from a flatbed scan of it. On Tue, Oct 22, 2024 at 10:56?PM gren via groups.io <hrgerson@...> wrote:
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Good News:?
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? Inexpensive Hp 7453a Carriage Assembly availability !!
??? for Hp 2225a Printer head electrode repair ( Follow Martin's? modification instructions in the File section )
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The Hp Q7453a Carriage Assembly ,? having the 10" Flex cable & cartridge electrodes
?? is available for about $10US each, from a company in the UK (England).
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?One can pay via PayPal? ( shipping discussed below ).
??? ( the price is in Euro's ~ 8.90@ , & the USD-Euro value fluctuates a bit, today the price was ~ $9.63 USD each. )
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See:
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Array Ink Ltd. ? https://www.arrayink.com
Write to Simon or Lyra asking for a PayPal invoice. at:? sales@...
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Apparently for US/ Canadian customers we don't pay the VAT tax.
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Shipping:
? If one orders quantity, the shipping can be free;? ask Simon for a quote.
???? I ordered Qty (5) and got free shipping.
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I could not find a North American / US supplier for these ( many US suppliers "out-of-stock", Or minimum order was Qty 200 !! )
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-- If you plan on keeping your venerable Hp 2225 ThinkJet printer for future use,
? ? ?? you *might* want to grab some of these replacement Carriage Assemblies
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Just as a data point, I purchased new Thinkjet cartridges via Amazon earlier this week. They arrived with December 2026 "use by" labels. They work great, they do not appear to be fake, and the output is flawless.
-Dave On October 24, 2024 3:07:04 PM "gren" <Bean595939@...> wrote: Good News: -- Dave McGuire, AK4HZ New Kensington, PA |
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Possible use of an FPC FFC connector converter board,? to ease the conversion from the old original hp 13 "pin" flex print-head cable to the "new" replacement 16 "pin" flex cable Hp Q7453a.
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?The 1mm 16pin from Ali Express { link below }
?? (? don't see many 16 "pin" flex connectors, most LCC FPC connector converter boards?
????? seem to go from 10, 12, & then skip to 20 pin ;
? Are there other suppliers ?
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Some FPC FFC converter connector boards have DIP male header,? ... so, perhaps connect directly to the Hp 2225 motherboard & remove the old 13 pin flex cable completely ??
( May never find NOS? original 13 pin flex Hp 2225 - 40005 print head cable anyway ?? )
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rick
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A1]
???? follow the excellent Repair Log "Fixing the ThinkJet" , by Martin Hepperle, September 2016.
????? ( .pdf? now in the Hp 2225a File Section herein ). One needs to buy an Hp Q7453a Carriage Assembly to do this.
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FPC LLC 1mm 16pin Ali Express:
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There are ( were ? )? some old, short videos discussing electronic circuits for the Hp 51604a ink cartridge, possibly for use in mobile robots, in (2) YouTube videos:
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YouTube: ?
( by: ?nanomagician ?, ?of http://www.fullspectrumengineering.com/hp51604a.html ?) ?
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1]
¡° ?Hp 51604A Inkjet Mini X Axis driven by Stepper Motor ¡° https://www.youtube.com/watch?v=K4jkOITEUHA
¡° ?Mini 5" printer assembly including mounted unipolar X axis stepper motor + HP 51604A cartridge holder with flex cable (fits in 16pin FFC). You can see how self contained and easily mounted to other projects this unit is. Circuit is super simple, only 1 chip and a few jumpers. Probably could use a diode to prevent back EMF but works fine without. 4 wires go to to the ULN2803 stepper supplied by 12V. Only 4 lines of propeller code needed to drive stepper. We will show printing in the next video but driving the Ink Cartridge is already covered extensively in ?( the book ) ¡® Inkjet Applications ¡® by Matt Gilliland. ?¡° ?
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2]
¡° HP 51604A ink cartridge shooting ink ¡°
https://www.youtube.com/watch?v=bYZYvhQ07Tk
¡° ?Here is a brief demonstration of the HP 51604A ink cartridge shooting ink from a single nozzle. A single 4.5us pulse fires the droplet. Then a delay of 1 millisecond before it shoots again. This is almost a continuous stream of ink and you can see the high volume possible from only a single nozzle. There are 12 nozzles but the PCB to drive them all is not finished yet. You can see the breadboard device with soldered joints to the FFC connector that attaches to the holder. Visit our website at http://www.fullspectrumengineering.com for more details and source code (to come). ?¡°
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Unfortunately the Web link for ? fullspectrumengineering.com/hp51604a? seems broken ( directed to ?? ).
I was able to view these two neat YouTube videos about a week ago, but today they both won't play for me, .... not certain why.
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rick
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More interesting adventures with the Hp 51604a ThinkJet ( Bubble Jet ) ink cartridge:
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DIY InkJet Printer:
https://www.thingiverse.com/thing:8542 ?
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96 dpi Serial Inkjet Printer Development Kit (#27949):
https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://forums.parallax.com/discussion/download/82688%26d%3D1309966184&ved=2ahUKEwiI9O7g2cCJAxVYE1kFHeFPMW4QFnoECBgQAQ&usg=AOvVaw2HKMcH11pflitnY9iq2xvQ
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Dave McGuire