Dynacord DMM 4650 owner manual Appendix, Troubleshooting

APPENDIX

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 blinking 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 mesages:

No:	Error Name	Function test
1	Reset	Power-On counter, no message displayed
2	Software	faulty micro processor interrupt
3	Modul-ID	changing number and activity of control ports (A-D) during power-on
4	+/- 15V	tests internal supply-voltage ± 15V
5	Bypass	function of audio bypass relay (hardware and software)
6	Fault	function of fault relay (hardware and software)
7	User-mem	data error of passwords and their priorities
8	Trig-mem	data error in trigger settings
9	Sequ-mem	data error in user presets of sequences
10	Stop-mem	data error in user settings of stop triggers
11	Alrm-mem	data error in alarm user presets
12	Gong-mem	data error in gong user presets
13	Msg-dir	data error in message file management
14	Msg-chsu	data error in message audio data (see also “message” on page 14 “*”)
15	ARS-RAM	communication error in DSP processor
16	ARS-mod	software error in DSP processor
17	Flash	tests for a changed number of flash memory cards
18	Block	faulty blocks in flash memory has been occurred later
19	EEPROM	error at writing into EEPROM
20	ROM	data modification of the microprocessor’s EPROM

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