* [http://www.cpcwiki.eu/manuals/service.manual.cpc664.ctm644.gt65.zip Amstrad CPC 664 Service Manual] - CPC664, CTM644, GT65
* [[media:Service.manual.cpc664.ctm644.gt65.pdf]] (Alternative version, rar above seems to be corrupted)
* [http://www.cpcwiki.eu/manuals/service.manual.cpc664.ctm644.gt65 .zip Amstrad CPC 6128 Service Manual] - CPC6128 (Rev0), CTM644, GT65
* [http://www.cpcwiki.eu/manuals/Amstrad%20PCW%208256-8512%20Service%20Manual.en.rar Amstrad PCW 8256-8512 Service Manual]
* [http://www.cpcwiki.eu/manuals/Amendment%20Service%20Manual.zip Amstrad CPC464-6128-GT65-CTM644-MP3-CT1 Amendment Service Manual] - CPC464 (Rev1 or Rev2?), CPC6128 (Rev0/incomplete, and Rev1/costdown), GT65, CTM644, MP-3, CT-1) - This file contains schematics for newer mainboards, but lacks service tips found in older manuals