Electro-Voice Dx38, Руководство по обслуживанию

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9
ENCODER TYPE
This program allows setting the appliance to the employed type of encoder. Changing the
encoder type is only necessary when older models with serial numbers up to 11228 (Dx 38) are
updated to a new operating system (V1.10 or newer). When shipped, the appliance is always
correctly factory-set, matching the employed encoder type.
STATISTICS
This program provides indication of how often the appliance has been switched on (Power on
count) and its hours of operation (Opr. Time).
QUIT
This command ceases the test mode. The appliance re-starts with the program that was active
before entering test mode.
Testing The µP-System During Power-On
During switching on the unit or performing a hardware reset, the indication of the status-LEDs D101
and D102 (located on the Digital PCB 80449) lets you localize a fault in the processor system.
The following happens in sequential order during a hardware reset of the Dx 38 CPU-system:
1. Hardware Reset
→
D101 lights D102 lights
2. CPU Start and Initialization
o. k.
→
D101 dimmed D102 lights
3. Checksum Test Bootload-ROM
fault
→
System 'hangs'
o. k.
→
D101 lights D102 dimmed
4. External RAM Test
fault
→
System 'hangs'
o. k.
→
D101 dimmed D102 dimmed
5. Checksum Test Application-ROM
fault
→
bootloader controls LEDs and RS232
D101 blinks with non-irq-task
D102 blinks with irq-task
o. k.
→
application starts and controls LEDs and RS232
D101 blinks with non-irq-task
D102 blinks with irq-task