Z88 Service Manual | ||
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General
The system test is carried out with the repaired Z88, in its case, mounted on a test frame. The full test equipment required is set out in the table below:
Equipment | Specification/Manufacturer | Item No. |
Sinclair Spectrum Mains Adaptor | Cambridge Computer | 1 |
Z88 Cased Unit Test Fixtures | Cambridge Computer | 2 |
Special Test Box (with separate power supply) | Cambridge Computer | 3 |
Test Card Connector for SKT2 | Cambridge Computer | 4 |
Test Card Connector for SKT3 | Cambridge Computer | 5 |
Test Card Connector for SKT4 | Cambridge Computer | 6 |
Test Card for Peripheral Expansion Connector | Cambridge Computer | 7 |
RS232 Termination Connector | Cambridge Computer | 8 |
Standard RAM Pack | Cambridge Computer | 9 |
Special Modified 32K RAM Pack | Local modification | 10 |
128K EPROM Test Program Pack | Cambridge Computer | 11 |
240 V Variable Transformer (with flying mains socket attached) | Local Purchase | 12 |
Adaptor Test Box | Cambridge Computer/Local manufacturer | 13 |
Preparation for Test
Before commencing the test verify the following:
Test Functions
The system test exercises all the Z88 functions and by use of screen prompts progresses through six defined states. The software test is followed by a comprehensive test of all power functions, including current drain in the operational and coma states and a check of the 'supercap' operation.
Procedure
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Introduction to system test | System test | Adaptator test |