HP IIISi "55 SERVICE"?

For the intended target audience, for their tradeoffs? Yes, actually, it is. They are mostly service-orgnaization staff, many of them comparatively poorly trained, and are - or at least should be - optimizing not for least parts replaced or some such, but for least time until the customer has a working printer again. You have pointed out often enough that the underlying fault is not necessarily in the component (FSVO "component") whose replacement makes the symptom go away. As true as this is, the fault usually _is_ there, especially when "component" is an FRU as large as it is in most such manuals. I conjecture, and the ubiquity of such service manuals seems to agree, that the additional downtime, training, and equipment that would be necessary to routinely do tony-style repairs on customer printers would more than outweigh the resulting savings (parts, mostly, at least for immediate-term savings). Not everybody shares your tradeoffs, especially since the manual was written when the FRUs in question were still being manufactured, as compared to now when they're tending towards unobtainium. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B