Macintosh Centris 610 Troubleshooting: Difference between revisions
Structural: remove the duplicated 'Component-level faults (deep dive)' block that repeated the PRAM-battery and capacitor sections already on the page, and move <references /> to the foot so it collects every citation (it previously sat mid-page with content after it) |
Remove the 'tantalum capacitors, logic board does not normally need recapping' paragraph - its own citation is a source for the Quadra 700/900 boards, not the Centris, and it contradicted the page's own capacitor section; add Apple's replace-below-3.2 V battery threshold |
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| SCSI errors || Termination or cable issue || Verify SCSI chain termination | | SCSI errors || Termination or cable issue || Verify SCSI chain termination | ||
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| Lost date/time || | | Lost date/time || Flat PRAM battery || 3.6 V ½AA lithium; Apple's instruction is '''replace below 3.2 V'''<ref name="ss610">Apple Computer, ''Macintosh Quadra 610/Centris 610/WS 60 Service Source'' ([[Macintosh Quadra 610/ Centris 610/WS 60 Service Source]], [[:File:Quadra.centris_610.ws_60.pdf]]), Specifications chapter and Additional Procedures → Battery Verification.</ref> | ||
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The Centris 610 carries a 3.6 V 1/2AA lithium PRAM battery. These leak and can '''burst''', spraying corrosive electrolyte across the logic board and destroying nearby components — often while the machine simply sits in storage. '''Remove the PRAM battery from any un-serviced unit.''' If one has leaked, neutralise and clean the residue and repair corroded traces and vias before troubleshooting.<ref name="mac2_batt">[https://68kmla.org/bb/threads/warning-exploding-maxell-pram-batteries.25169/ "Warning! Exploding Maxell PRAM Batteries"], 68kMLA; and [https://macdat.net/macintosh/macii/macintosh_iicx.html MacDat — Macintosh II family]. Source for the leaking/exploding lithium PRAM battery that destroys nearby components.</ref> | The Centris 610 carries a 3.6 V 1/2AA lithium PRAM battery. These leak and can '''burst''', spraying corrosive electrolyte across the logic board and destroying nearby components — often while the machine simply sits in storage. '''Remove the PRAM battery from any un-serviced unit.''' If one has leaked, neutralise and clean the residue and repair corroded traces and vias before troubleshooting.<ref name="mac2_batt">[https://68kmla.org/bb/threads/warning-exploding-maxell-pram-batteries.25169/ "Warning! Exploding Maxell PRAM Batteries"], 68kMLA; and [https://macdat.net/macintosh/macii/macintosh_iicx.html MacDat — Macintosh II family]. Source for the leaking/exploding lithium PRAM battery that destroys nearby components.</ref> | ||
== Logic board | == Logic board capacitors == | ||
'''The claim that this logic board needs no recapping came from a fact about a different | |||
machine.''' A paragraph previously on this page stated that the 68040-family board uses tantalum | |||
capacitors which do not leak, and that "the logic board does not normally need recapping" — while | |||
the same page's capacitor section, and its own capacitor guide, describe surface-mount | |||
electrolytics that do. The citation attached to that paragraph says in its own text that it is a | |||
source for "Apple's use of tantalum (non-leaking) capacitors on the '''Quadra 700/900''' logic | |||
boards". It was carrying a Quadra 700/900 fact onto a Centris page. It has been removed. | |||
'''What is actually established here:''' no Apple parts list for this logic board is held on this | |||
wiki, and the capacitor complement given on | |||
[[Macintosh Centris 610 Capacitor Replacement Guide]] comes from a | |||
secondary reference and is labelled there as such. Treat a leaking or corroded board as a board | |||
that needs work, and a clean one as one that does not, rather than working from a rule about the | |||
family. | |||
== Power supply == | == Power supply == | ||