Z88 Service Manual
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2. 32k RAM PACK MODIFICATION

In order to modify a standard 32k RAM pack to produce a test pack for use in System Test, certain wiring must be connected from the chip to the card connectors as follows:
32k RAM ChipCard Connector
A12 (pin 2)wire to A17 (pin 36)
A13 (pin 26)wire to A18 (pin 37)
A14 (pin 1)wire to A19 (pin 38)


Figure A.1 - PSU FOR TEST FIXTURE

NOTE: Output is as follows depending on the position of switch A:


Figure A.2 - RS232 LOOPBACK TEST PLUG

NOTES:


Figure A.3 - CARD TESTER CIRCUIT FOR SLOT CONNECTORS AND BUS EXTENSION CONNECTOR

NOTES:


Figure A.4 - SLOT TESTER TEST HEAD CIRCUIT DIAGRAM

NOTES:


Figure A.5 - BUS EXTENSION TESTER TEST HEAD CIRCUIT DIAGRAM

NOTES:


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Introduction to test equipments 32K ram pack modification