48k Sinclair Spectrum information
The Lil Old Sinclair Computer Technical Information Repository
48k information
48k Service Manuals
this is the official UK service manual
- online version is available here
- the whole manual in ZIP format for offline viewing (342k)
note the above do not include the schematic diagrams or the component layouts
following unofficial guide courtesy of Ian Worsley
- online version is available here (its big, 49.5kb)
- the above in ZIP format for offline viewing (163k)
48k Schematics
-- these are all in 16 colour GIF format
they are large in size, so its best to right click and save as rather than view online
- 2_sch.gif - issue 2 schematic - 508k (3704x2648)
- 3_sch.gif - issue 3 schematic - 710k (4055x2781)
- 3b_sch.gif - issue 3b schematic - 710k (4095x2799)
- 4ab_sch.gif - issue 4a/b schematic - 888k (3812x2573)
- 5_sch.gif - issue 5 schematic - 482k (3226x2415)
- 6a_sch.gif - issue 6a schematic - 710k (4576x2940)
-
Swedish Spectrum with Beckman AB EPROM installed
uses OKI upper memory with links set to TI
iss3_nordsch.gif - issue 3 modified schematic - 717k (4055x2781)
the above were previously available on my fortunecity site
48k Component Layouts
Diagrams of where the components are on the pcb board.
-- these are all in 16 colour GIF format
the above were previously available on my fortunecity site
The Servicing Articles Mirrored from The Spectrum Hardware Page
of course there is always the messageboard where you can post your problems, solutions etc :)