142 6
Digital Control Troubleshooting
START HERE
Figure 6-6 Bootloader Display
4. Check the A1 Volatile Memory
1. Turn the analyzer power on.
2. Press [System], DIAGNOSTIC TEST, [2], [x1], RUN TEST to run the internal test 2: A1
VOLATILE MEMORY.
3. Check that no error message is displayed. At the end of this test, the analyzer returns
the control settings to the default values (power on reset). If the test fails, the analyzer
displays an error message for a few second before returning to the defaults.
• If no error message is displayed, the A1 volatile memories are verified. Continue
with Check the A30 Front Keyboard.
• If one of the error messages listed below is displayed, the A1 CPU is faulty.
Replace the A1 CPU.
“CPU INTERNAL SRAM R/W ERROR”
“DSP SRAM R/W ERROR”
“DUAL PORT SRAM R/W ERROR”
“CPU BACKUP SRAM R/W ERROR”
5. Check the A30 Front Keyboard
The A30 front keyboard can be checked using the external test 17: FRONT PANEL.
1. Press [Preset], [System], DIAGNOSTIC TEST, [1], [7], [x1], RUN TEST to run the
external test 17.
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