The Lil Old Sinclair Computer Technical Information Repository

128k/+2 information

PAL10H8 chip information is available here (last update 22/02/2001)

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128k information
  ZX Spectrum+ 128K Schematic Diagrams
    UK Models
    Investronica Model 2-1
  ZX Spectrum+ 128K Component Layouts
    Investronica Model 2-1
  ZX Spectrum+ 128K Photographs
+2 information
  +2 Schematic Diagram
  +2 Component Layout
  +2 Mainboard & Tape Sub Board photos

***** 128k information *****

ZX Spectrum+ 128K Schematic Diagrams

note : these are works-in-progress
if you spot any errors or can add information please get in contact

UK Models

Investronica Model 2-1

The UK model is the 6U board, but the Investronica
model has differences in the RGB circuits and other places

Note the Investronica models have major differences on the RGB output
the pins are not the same as the UK models

ZX Spectrum+ 128K Component Layouts

Investronica Model 2-1

The UK model is the 6U board, but the Investronica
model has differences in the RGB circuits and other places

ZX Spectrum+ 128K Photographs

Note that these files are large due to the very good quality,
they are also available in PNG format by request only,
since they are huge (1.54Mb / 2.38Mb)

Thanks go to Ian Worsley for these, ask permission before use

***** +2 information *****

+2 Schematic Diagram

this is for the PCB marked Z70500 iss3, and includes revisions for boards marked 86/30 through to 86/42

this is another work-in-progress
so if you spot any errors or can add infromation please get in contact

+2 Component Layout

+2 Mainboard & Tape Sub Board photos

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