Xerox WorkCentre 7525 & 7830

7535 Copier

Welcoming the Newer Models to the 7425 Style

Xerox® WC 7425, 7428 & 7435 styles, 7525, 7535, 7545, & 7556 styles, and 7830, 7835, 7845, & 7855 styles)

When new models follow older models’ footprints, it’s a huge help. It helps reduce the learning curve to work on a machine that already feels familiar. Of course there are always subtle differences to be found among the newcomers—things worth knowing about which can save you plenty of head scratching time. This month, let’s have a look at the basics of the diagnostics for the newer 7525 and 7830 families in comparison to the first batch of models (7425-7435) which we had covered in ENX back in the summer and autumn of 2013.

First off, let’s talk about the differences between the supplies. The supplies changed significantly from the 74xx family that started this style out. The toner cartridges don’t fit back and forth and in fact there was a change in the formula in the toners that came with the newer models. The drum cartridges look nearly identical and share a lot of the same or very similar parts, but there are actually two important differences—the 7425 version (013R00647) naturally had a different CRUM chip (Customer Replaceable Unit Monitor) compared to the 7525 / 7830 version (013R00662). Second, there is an indexing hole in the front metal plate behind the front cover that has a different diameter when you compare the two. This causes trouble if you try to install a 7425 in a 7525 or vice versa.

The fuser modules look similar at first glance, but are almost nothing alike. The newer models utilize altogether new technology (induction heating). The older 7425 fusers had a traditional rigid heat roll and a film sleeve over a pressure pad. The new models instead of having a familiar heat roll have a heat belt, like a semi-rigid sleeve with a gear glued to the end, and conversely, it has a traditional looking pressure roller.

In addition, the document feeders and the cleaning assembly have changed as well, but the second BTR (transfer roller) is the same, as are the paper feed rolls.

Now onto something rather fascinating. The fault codes, which were published in ENX in the August 2013 issue, turn out to be very similar codes for the most part in the newer models, EXCEPT that they changed the first digit in every code from a ‘0’ to a ‘3’. For example, in the 7425 a fault code of 092-312 means ATC (Automatic Toner Concentration) Failure for Yellow, and in the newer book the same fault would appear as a 392-312. There was one important fault code I actually could not find in the newer service manual to my surprise. I saw no fault code clearly meaning IBT Belt Home Position Sensor Failure. Usually that is a fail which locks up a machine, but in the 75xx book, this code either hid extremely well, or simply wasn’t there to be found. Feels like I am missing something.

Para mais informações quanto aos códigos da NVM e informações técnicas acesse os MANUAIS DE SERVIÇO em nosso website.