HP IIISi "55 SERVICE"?

There are several aspects ot this. Firstly, repairng soemthing is essentaill 2 deistinct operations. Firslty finding the fault and sceondly correcting it. For ther latter, it's likely that some parts have to be rpelaced. So part of the serive/repair manual (to me they are much the same thing) is how to rpelace aprts. Now some things are obvious to anyone who should be working on such a device. I do not expect a service manual to tell me how to undo or tightne screws or how to sodler. But I would expect a car workhop manual (say) to give the tightening torgues for any bolts where that is improtant. And the tighenting sequence for things like the engine cylidner head. Simialrly a computer repair manual should indicate if special solder (lead free, silver loaded, etc) is to be used. The other parit is findinf the fault. This should mean being able to detrrming which 'component' (suing the appropriate 'size' of component, it might be complete PCBs) has failed. Which IMHO does not mean replacing parts until the thing works again. It means making measurements. It's interesting that for a number of manufacutrers, the 'service' manual is essemntiall a parts list, expoded diagram (maybe with a dismantlign sequence) and a schematic. The repairier is expected to be able to follow the scehamtics nad use it to find the fault. As for minimising downtime, what this means is not clear. DOes it mean to get the device working as soon as possible, even if it fials again in a couple of days (or hours), or does it mean to get it working so that it doens't fail again for a reasonable period? The 2 are not the same. -tony