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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