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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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