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Important:.. the information presented here is for the use of a qualified, experienced technician. Without the background knowledge which comes with training, you risk doing more damage than good to the copier & also risk your own safety.
If you are not willing to take 100% responsibility for your actions, do not use the information posted here. Thank you. Read our Conditions of Use for more information

First Published in ENX Magazine... go check out all the new articles and information at

AAA (Article About Acronyms)… Xerox’s language of choice.

   As a society, we are well adjusted to the use of acronyms … heck, we even refer to our country as the US instead of spending all that extra time saying the other two syllables in United States. There are tons of acronyms we use everyday. For example, if you place a PO and UPS brings it COD but you don’t have a check ready for the driver, you know you’re SOL… Safe to say we all know what all of that means ey? Well… Xerox uses acronyms like a new language all their own. If you’re going to be using one of their manuals, ordering parts or asking technical questions, you’ll be well served with a little insight into this language of abbreviation.

    First we’ll start off with a quick romp through a few common terms which Xerox didn’t need to invent because they were already used… Most of us know AC is Alternating Current, DC is Direct Current, AMP is short for Ampere, ESD means Electrostatic Discharge, an LCD is a Liquid Crystal Display, an SSR is a Solid State Relay, and an LED is a Light Emitting Diode.

    Xerox frequently uses acronyms to refer to parts… PWB’s (Printed Wire Boards) and PWBA’s (Printed Wire Board Assemblies). No… PWB is not “Power Board” (a common misconception).

    If the machine has no power, you’re likely to need a new LVPS (Low Voltage Power Supply), if the copy comes out blank, you may need an HVPS (High Voltage Power Supply). Digital machines have things like the CCD (Charge Coupled Device) which is the lens and board which turn the image into a digital signal, and the ROS (Raster Output Scanner) which is basically Xerox’s terminology for the Laser Unit. Also there is the GDI which is a Graphical Device Interface… the board which interfaces between a PC (there’s another one!) and the copier.

    Of all the parts, the accessories get the most diverse set of acronyms. The ADF(Automatic Document Feeder) is also called DADF if it is a Duplexing ADF. Then there are SDF’s (Stationary Document Feeders) which are those little feeders which keep the mirror carriage still and pass the document over a slit glass. Some machines have an ADH (Automatic Document Handler) which is a synonym for an ADF. There are also RDH’s (Recirculating Document Handlers).

    High Capacity Feeders (HCF’s) also have synonyms such as HCT’s (High Capacity Trays) and LCT’s (Large Capacity Trays).

    In the 5018 series of machines, tray 2 and 3 are often referred to as the Two Tray Module (TTM) or if the machine does duplexing (such as in a 5034), tray 2 and 3 are known as the DM (Duplex Module). You’ll be happy to know a NOHAD module is a “Nuisance, Ozone, Heat, And Dust module” (there’s one I was personally wondering about myself).

    The drum cartridges are often referred to as the CRU or “Customer Replaceable Unit”, and the connector on the back of the CRU which ends the life of the cartridge is the CRUM (Customer Replaceable Unit Manager)… Got to love that name.

    Xerox also has ways of describing different markets with just a few letters. USO is the United States Operations… USCO adds the word Customer in there (same market, different machines oddly enough). Then there is Latin America (XLA) and XC for Canada. Europe used to be RX (Rank Xerox) till the ownership changed hands and became XL (Xerox Limited).

    Getting around in a Service Manual is a bit easier if you know off the top of your head that a RAP is a Repair Analysis Procedure, a REP is a Repair Procedure, Adjustments are ADJ’s, the CQ section refers to the Copy Quality (or in a different manual it might be called the IQ section for Image Quality). GP’s are General Procedures, PL is the Parts List section and the BSD’s are the Block Schematic Diagrams (wiring diagrams). It’ll also help you to know that the NVM is the “Non Volatile Memory” and the HFSI’s are “High Frequency Service Items”.

    The cryptic language of acronyms is by design obscure… it helps keep only the folks “in the know” informed. It’s for this reason that it is surprising how many of us choose to refer to the acronyms of our own company names rather than saying the names in full… Something to think about.

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