Marquette Hellige GmbH MicroSmart V 2.xx Page 49
Servicing Instructions 227 470 35 B - 97.12
7 Troubleshooting
Mains plug connected; the unit cannot be switched on
- green LED of power indicator light fails to light up and unit cannot be switched
on:
- line power lead defective or not connected properly?
- primary fuses in line inlet module defective?
- plug CB on power supply properly connected?
- plug CA on power supply properly connected?
- plug PSCON on PCB MicroSmart properly connected?
- keyboard properly connected via plug AS on PCB MicroSmart?
- if all items above are OK: ===> power supply unit defective
- green LED of power indicator light lit, unit still cannot be switched on:
- On/off key of unit defective?
- fuses SI500 on PCB MicroSmart defective?
- if all items above are OK: ===> PCB MicroSmart defective
Battery operation selected; unit cannot be switched on
- plug connection G on battery properly connected?
- battery exhausted/discharged?
- connect mains plug, green LED of power indicator lights must light up and unit
can be activated. If not, see above under "Mains plug connected; unit cannot be
switched on".
- battery charge activated when connecting the mains plug
- after 10 minutes charging, disconnect the mains plug, can the unit be switched on
and a recording be triggered?
- ===> battery defective or capacity too low
- ===> or battery charge on PCB MicroSmart defective
Blank display
- after power-up, does the yellow Stop LED on the keyboard light up?
- if not: - see under "Unit cannot be ..... switched on".
- Contrast bad? (change contrast)
- Alarm signal approx. 5 sec. after power-up of the MicroSmart? (indicates that the
self-test is complete).
- if yes; - display properly connected?
- if yes: ===> display defective?
===> or control on the PCB MicroSmart defective.
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