Editing Sinclair ZX Spectrum 128 Capacitor Replacement Guide (section)

=== Ceramics — normally left alone ===

{| class="wikitable styled-table" style="width:100%; text-align:left;"
|+'''ZX Spectrum 128 main PCB — ceramic capacitors'''
! Ref !! Value !! Rating / tolerance
|-
| C1–C8 || 22 nF || 25 V, 10%
|-
| C26 || 22 nF || 25 V, 10%
|-
| C29, C30 || 22 nF || 25 V, 10%
|-
| C31, C32 || 100 nF || 25 V, 10%
|-
| C35 || 10 nF || 25 V, 10%
|-
| C41 || 22 nF || 25 V, 10%
|-
| C43 || 100 nF || 25 V, 10%
|-
| C49 || 560 pF || 25 V, 10%
|-
| C55–C62 || 22 nF || 25 V, 10%
|-
| C66 || 22 nF || 25 V, 10%
|-
| C67 || 100 pF || 25 V, 10%
|-
| C75 || 100 nF || 25 V, 10%
|-
| C100 || 10 nF || 25 V, 10%
|-
| C101 || 22 nF || 25 V, 10%
|-
| C104 || 100 nF || 25 V, 10%
|-
| C105 || 150 pF || 25 V, 10%
|-
| C106–C110 || 22 nF || 25 V, 10%
|-
| C113, C114 || 47 nF || 25 V, 10%
|-
| C115 || 330 pF || 25 V, '''2%'''
|-
| C116 || 10 nF || 25 V, 10%
|-
| C118, C119 || 1 nF || 25 V, 10%
|-
| C120 || 100 pF || 25 V, 10%
|-
| C121 || 47 pF || 25 V, 10%
|-
| C122 || 1 nF || 25 V, 10%
|-
| C124 || 20 pF || 25 V, '''2%''' — see note below
|-
| C125 || 100 nF || 25 V, 10%
|-
| C126 || 22 pF || 25 V, 10%
|-
| C128 || 47 nF || 25 V, 10%
|-
| C129 || 100 pF || 25 V, 10%
|-
| C130 || See note || 25 V, '''2%'''
|}

'''Note on C124 and C130.''' The Service Manual states that if preferred, the 20 pF capacitor used for '''C124''' may be split into two parallel capacitors of 10 pF ±2% fitted at positions '''C124''' and '''C130'''. That is why C130's value is given by reference rather than as a number — whether it is populated depends on which option the board was built with. Check your own board.<ref name="sm128" />

The manual also notes that provision was made on the PCB for a '''2–22 pF film dielectric trimmer''' should the need arise.<ref name="sm128" />

The tight-tolerance parts (C115, C124, C130 at 2%) sit in timing and colour circuitry — if you replace them, match the tolerance, not just the value.