CX5200 Field Service Manual
37
NOTE: Figure 3-6 shows a sample Pokey Adjust screen. The values on your
screen may differ from those shown in Figure 3-6.
POKEY SOFTFIRE TEST
1.
Connect the oscilloscope to pin 16 of A7 (1V/div.; 10ms/div.).
2.
Insert the controller into port 1.
3.
Press key 5 followed by START.
4.
Press the top fire button (softfire).
5.
A 5V pp square wave signal should appear (Fig. 3-7). If it does not, proceed
to the SOFTFIRE TROUBLESHOOTING FLOWCHART, page 64.
6.
Unplug the controller from port and plug it into next port.
7.
Repeat the fourth and fifth steps for port 2, 3 and 4.
Fig. 3-7 Softfire signal.
ERROR SUMMARY
Errors during the RAM, PORT, and verify OS ROM Test are displayed on the
matrix shown in Figure 3-5.
Error # (Table 3-1)
Number of failures
Number of tests
(max 99)
Figure 3-8. Error Summary Screen
Содержание CX 5200
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