Troubleshooting - Dynacord DMM 4650 Owner's Manual

Troubleshooting

In stand-by mode the DMM 4650 runs a number of test routines in order to detect device faults at an early stage.
Errors are indicated by the flashing of the green POWER LED. With fatal errors or when errors start to appear
more often the biinking of the LED gets faster and the fault relay drops. At the same time, the audio input is
connected directly to the output via the bypass relay.
The menu "self test" provides a listing of error numbers and occurence of the following messages:
No: Error Name
1 Reset
2 Software
3 Modul-ID
4 +I- 15V
5 Bypass
6 Fault
7 User-mem
8 Trig-mem
9 Sequ-mem
10 Stop-mem
11 Airm-mem
12 Gong-mem
13 Msg-dir
14 Msg-chsu
15 ARS-RAM
16 ARS-mod
17 Flash
18 Block
19 EEPROM
20 ROM
APPENDIX
Function test
Power-On counter, no message displayed
faulty micro processor interrupt
changing number and activity of control ports (A-D) during power-on
tests internal supply-voltage
function of audio bypass relay (hardware and software)
function of fault relay (hardware and software)
data error of passwords and their priorities
data error in trigger settings
data error in user presets of sequences
data error in user settings of stop triggers
data error in alarm user presets
data error in gong user presets
data error in message file management
data error in message audio data (see also "message" on page 14
communication error in DSP processor
software error in DSP processor
tests for a changed number of flash memory cards
faulty blocks in flash memory has been occurred later
error at writing into EEPROM
data modification of the microprocessor's EPROM
15V
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