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This Cartridge is a 4-in-1 diagnostic cartridge to help troubleshoot

and repair ZXSpectrum's 16k,, 48k, 48k+,128k, and, +2 (Grey).

This cartridge is also compatible with the later black +2 A/B, +3 Amstrad models.

This is essential to troubleshoot memory, ULA faults and help with system tests.

1. Retroleum Diagnostic ROM v1.73

(16,48,128k Memory, ULA and other System Tests).

By Phil Ruston

2. Smith & Alford Diagnostics, 0.37D

(16,48,128k Memory, ULA and System Tests).

3. Official Sinclair ZX 48k Spectrum Test ROM, By Dr. Ian Logan

(Memory and System Tests).

4. Official ZX Spectrum 128k and 128k +2, By Dr. Ian Logan

(Memory and System Tests).

The EEPROM is pre-programmed with a range of diagnostic and test software.

This cartridge uses a Winbond 27C512 EEPROM.

It has a user-friendly ROM selector switch and a basic instructions sheet.

It incorporates LED'S to indicate +5v, -5V, +9v and +12V voltages when troubleshooting.

Please be aware there are no +9v or -5v on the later Black Amstrad models.

This Cartridge can also be used as a 16k ROM cartridge.

after you have repaired your Spectrum.

This item will be posted the next working day.

All items are shipped in anti-static packing.

Delivery times are stated in the postage and payment tab and will be posted with tracking. Delivery times are estimated.

Please feel free to ask any questions via eBay messages.

1x ZX Spectrum 16k 48k 128 +2 +3 Diagnostic Test Cartridge REV:H