Cartridge & Expansion Slot Test Fixture - Atari 130XE Service Manual

On completion of all tests, the screen will show any tests which failed (except AUDIO or
VIDEO, since the operator must determine if the test passes). Finally, the operator should
press the reset key to verify that it works (the screen should go blank).
CARTRIDGE & EXPANSION SLOT TEST FIXTURE
The CARTRIDGE & EXPANSION SLOT test fixture (Fig. 3-9) insures that all traces are
properly connected on the PCB. On power-up of the computer the board looks for a state
change on all output and bidirectional lines. If NO state change is detected then the
corresponding LED will light.
In order to test the input lines the operator will have to select PBI test from the menu. Once
selected it will report 3 types of errors:
1. ERROR 71; This means that either RD4 or S4 is not present on cart connector and/or
A13 is not present on Expansion connector.
2. ERROR 72; This means that MPD is not present on Expansion connector.
3. ERROR 73; This means that EXSEL is not present on Expansion connector.
The Audio In line is also tested by the software, when you select PBI a motor type noise
should be heard from the TV or Monitor speaker. If NO noise is heard then Audio In is not
present on Expansion connector.
If Errors 72,73, and no sound occur simultaneously then CCTL line on cart connector is not
present.
Figure 3-14. Cartridge & Expansion Slot Test Fixture
130XE Personal Computer
Field Service Manual
FOR 130XE ONLY
3-10