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UPGRADE NOTES

PCB Assembly #1540048 (Schematic 1540049) requires an upgrade to the reset circuit. The upgrade consists of:

1) COMPONENT CHANGES:
R25 Change To 6.8K ohm, 1/4 W, +/-5%
R57 Add 220 ohm, 1/4 W, +/-5%
R58 Add 2K ohm, 1/4 W, +/-5%

2) CUT circuit trace near UA1 (See diagram)
[Upgrade diagram]

3) INSTALL JUMPER WIRES:
BETWEEN: UA1 pin 8 and UB1 pin 5
UA1 pin 9 and CR4 Anode
UB1 pin 6 and UD3 pin 5 on BACK of board

4) CUT circuit trace between CR7 Anode and UD3 pin 5 on BACK of board.


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This page has been created by Sami Rautiainen.
Last updated February 11, 1998.
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