Replacement Parts List

Built-in

Submitted by Dan Dooré on Wednesday, February 10, 2021 - 16:01.

Publisher

MGT

Description

Here are some replacement parts detailed below.

Electrolytic Capacitor List Mainboard

Note that there is differences in the field with values of C4 and C36-38 which can be either 22uF or 47uF and occasionally 25V parts.

There seems to be no issue in these differing parts: C4 is the reset delay capacitor, C36-38 are used on the RGB lines into the Motorola MC1377P so are only relevent for composite video & RF output.

You can replace like-for-like or use the list below based off the bug-fixed schematics linked on the Internal PCB page.

C4   47uF 50V
C12   22uF 50V
C13   22uF 50V
C16   22uF 50V
C18   22uF 50V
C19   22uF 50V
C27   22uF 50V
C36    47uF 50V
C37    47uF 50V
C38    47uF 50V
C46   22uF 50V
C47   22uF 50V
C49   22uF 50V
C51   22uF 50V
C52   22uF 50V

Electrolytic Capacitor List PSU

C1 4700uF 16V - Use 25V part
C2 4700uF 16V - Use 25V part
C4 1000uF 16V - Use 25V part

Electrolytic Capacitor List Modulator PCB

3 x 22uF 50V (unmarked locations)

Electrolytic Capacitor List Sam Drive

From Ben Versteeg's blog, see for placing details.

C101 22uF 16V 5mm SMD – Farnell: 2611359
C102 22uF 16V 5mm SMD – Farnell: 2611359
C35 1uF 50V 4mm SMD BIPOLAR – Mouser: 647-UWP1H010MCL

Additional for alternative drive PCB:

C101 22uF 16V 5mm SMD – Farnell: 2611359
C102 22uF 16V 5mm SMD – Farnell: 2611359
C35 2.2uF 35V 4mm SMD BIPOLAR – Farnell: 2326177 / Mouser: 667-EEE-1VA2R2NR
C39 10uF 16V 4mm SMD – Farnell: 2901318

Switches & Buttons

Reset switch: C&K PB-22D01-F NS
Break switch: C&K PB-22D01-F NS
Power switch: ALPS SPUN192800

Red Reset Button: C&K 801803000
Black Break Button: C&K 801802000
Power Button: End Profile approx. 9.5mm x 5.5mm, Length: approx. 11.5mm, Plunger approx. 3.3mm square

Screws

PCB (x7): M3 Pan Head, 6mm Steel

Serial Number/RAM expansion plate (x4) : M3 Pan Head 6mm blunt end plastic self-tap

Keyboard plate (x12): M2.6 Panhead, Pan Head 6mm blunt end plastic self-tap

Keyboard mount to case (x4): M3 Pan Head 9mm blunt end plastic self-tap

Case base screws (x6): M2.6 Panhead, Pan Head 9mm blunt end plastic self-tap

Disk Drive (x2 per drive): M3 Pan Head, 6mm Steel

External Interface screws (x2 per box): M2.6 countersunk 16/20mm self-tap

Keyboard Connectors

K1-K8 Connector plug (Data Lines)