Old thread but in case somebody else is looking I've found the following manuals so far. Several came from manualslib and you have to search for Agilent AND HP. Haven't dived into web archives yet.
YYYY-MM_Edition-ManualName
1999-08_Ed06-Triple Output Power Supply HP Model E3630A ... 12pages, doesn't have appendix, so no schematics in this
2000_04_Ed07-Triple Output Power Supply Agilent Model E3630A ... 29pages, has appendix, so parts list, schematics, troubleshooting (no component diagram)
2007_10_Ed08-Triple Output Power Supply Agilent Model E3630A ... 10pages, doesn't have appendix, so no schematics in this
2014_04_Ed11-Triple Output Power Supply Agilent Model E3630A ... 27pages, has appendix but no schematic or parts list but has component diagram including display board