Z70830 ISSUE 1 Motherboard

Component names from the Z70830 Schematic.

A wire link is made between IC14 Pin 1 and IC20 Pin 13 on the solder side of the board.

R38 and C51 are soldered on the copper side of the board.

D36, D37, and D38 are soldered on the copper side of the board.

C52 is soldered on the copper side of the board.

Z70833 ISSUE 1 Motherboard

Modifications made to some ISSUE 1 boards.
Component names from the Z70833 ISSUE 1 Schematic

Resistor R45 is deleted

A wire link is made between the right hand pad of R45 and Pin 4 of IC15 on the component side of the board.

A wire link is made between Pins 3 and 6 of IC15 on the component side of the board.

A 330pF capacitor is soldered between Pins 5 and 7 of IC15 on the component side of the board.

Z70833 ISSUE 2 Motherboard

Component names from the Z70833 ISSUE 2 Schematic

C53 absent on some boards.

A 100pF capacitor is soldered between 5 volts and D6 on some motherboards. Sometimes soldered between Pins 10 and 11 of IC2 on the IC legs. Sometimes soldered between Pin 10 of IC2 and Pin 20 of IC14 on the solder side of the board.