Sinclair ZX Spectrum Service Manual
Spectrum For Everyone https://spectrumforeveryone.com/
41
8 PARTS LIST
Introduction
Notes to Part List for Issues 2, 3 and 3B
General capacitor change
Case Assembly
Capacitors
Coil
Connectors
Crystals
Diodes
Integrated Circuits
Resistors
Transistors
Miscellaneous
8.1 INTRODUCTION
Parts lists for the ZX Spectrum are provided in table form; one for the case assembly and another for the
board assembly. The latter covers the Issue 2 and 3 Spectrums and is related to the board layout diagrams
available here and here.
The board assembly parts list also lists the alternative components which the service engineer will
occasionally find on production versions of the Issue 2 board or may introduce retrospectively in order to
improve performance. These components are listed in the column headed `ISSUE 2 MODS` with
references to the notes against them. These notes are explained below.
8.2 NOTES TO PARTS LIST
1. The alternative values given for R47, R49, R56 and R63 are used if the ULA fitted it Type 6C001.
2. The alternative values for R48, R50, R72 and C65 are introduced to improve the colour quality.
3. C74 is essential on all Issue 2 boards and should be fitted retrospectively. At the same time R60
must be replaced with the larger value.
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