RobertCX
The neatest bodge ever on my SGS Nanocomputer!
The Nanocomputer keypad/display unit unfortunately has a fault in one of the drive transistors (in an array), and it is a totally obsolete/arcane part (BGY16), not available anywhere. So I solved the problem by cutting off the two offending device pins, and soldering in a bog standard PNP transistor in its place - I chose the transistor to have a matching pinout (ECB), so it could be neatly soldered in place with no crossed wires. Note the purple insulation to prevent it shorting against the residual bits of the chip pins.
The neatest bodge ever on my SGS Nanocomputer!
The Nanocomputer keypad/display unit unfortunately has a fault in one of the drive transistors (in an array), and it is a totally obsolete/arcane part (BGY16), not available anywhere. So I solved the problem by cutting off the two offending device pins, and soldering in a bog standard PNP transistor in its place - I chose the transistor to have a matching pinout (ECB), so it could be neatly soldered in place with no crossed wires. Note the purple insulation to prevent it shorting against the residual bits of the chip pins.