Retroleum.co.uk

Spare parts for Commodore 64, ZX Spectrum and more!

** US customers, please see note below about tariffs etc ***

Replacement motherboards for the 48K ZX Spectrum

All boards have been carefully refurbished by myself, cleaned and tested thoroughly for several hours. Tests include load from tape, keyboard input, speaker, RAM, ROM, Z80 M1 signal and a 2-hour soak-test.

Images are just for illustration - see the item descriptions for the exact type. If you need a reset switch for the Plus case (and there's some in stock) please add one to your cart and - if you wish - ask me (in the Special Instructions box during checkout) to solder it on before dispatch - no charge for that:)

Some boards are sold without ULA chips - please see the individual item descriptions. The issue 4S boards will usually be sold un-recapped as the original Samwa brand caps are still pefectly fine.

Products:

Click on the product thumbnail for an enlarged view.

Internal reset switch for Spectrum+ *New*

New internal reset switch for Spectrum+ or Toastrack 128

Brand new
Same as original reset switch but has a light grey plunger instead of brown/black (Note: if you have an original reset switch that has gone bad, you can actually swap the original plunger to the new switch body by gently tilting it to the side until it comes out (care must be taken to avoid breaking anything.)
For Spectrum+ and Toastrack 128

Internal reset switch for Spectrum+ *Original*

An original internal reset switch for Spectrum+ (used) and Toastrack 128

As used in the Spectrum+ (soldered across capacitor C27 - or at the provided pads on issue 6 motherboards)
Also used in the Toastrack 128
Tested, working.

Replacement Sinclair ZX Spectrum Motherboard Issue 3B

Sinclair Spectrum 48K Motherboard Issue 3B, UK PAL With Sinclair ULA

Re-capped (with blue Axial capacitors) and composite modded
Full working order. Tested for hours running diagnostic memory test, Ear tape load input, Z80 M1 signal, edge connector operation, keyboard inputs etc.

Replacement Sinclair ZX Spectrum Motherboard Issue 4S - not re-capped

Sinclair Spectrum 48K Motherboard Issue 4S with Sinclair ULA

Video output modded to deliver composite video instead of RF.
Full working order. Tests include Ear input, M1 signal, edge connector, keyboard inputs etc.
Note: This board has NOT been re-capped because the original Samwa capacitors are still good.
4S boards were made by Samsung for Sinclair and are higher quality (eg: solder mask on both sides of the PCB, superior quality capacitors). They are often found in the Spectrum Plus but also the rubber key Spectrums that were manufactured in Korea.

Replacement Sinclair ZX Spectrum Motherboard Issue 6A

Sinclair Spectrum 48K Motherboard PAL/UK, Issue 6A with Sinclair ULA

Re-capped (blue axial caps) and video output modded to deliver composite video instead of RF.
Full working order. Tested for hours running diagnostic memory test, Ear tape load input, Z80 M1 signal, edge connector operation, keyboard inputs etc.