Alesis MICROVERB 4 Manuel d'utilisateur télécharger pdf (Page 4)

10-22-02

Troubleshooting Chart

The charts below were created in an effort to relieve the beleaguered technician

from having to "discover" some of the common faults we have seen. Please note that we

only cover the most likely causes, not all of them.

C4 Symptom Possible Cause Solution

No Lights, No Sound. (Dead). Faulty AC adapter. Replace and retest.

Defective component in power supply circuit. Troubleshoot and repair as necessary.

Loose front panel cable. Troubleshoot and repair as necessary.

No wet (effects) signal. Faulty ASIC Replace and retest.

Faulty DRAM Replace and retest.

Faulty Crystal Replace and retest.

Faulty DAC Troubleshoot and repair as necessary.

Faulty ADC Troubleshoot and repair as necessary.

Distortion. Faulty Power Supply Rail Troubleshoot and repair as necessary.

Faulty op-amp Troubleshoot and repair as necessary.

Faulty DAC Troubleshoot and repair as necessary.

Faulty ADC Troubleshoot and repair as necessary.

Programs not changing. Faulty shaft encoder. Replace and retest.

Intermittent operation. Faulty Crystal. Replace and retest.

Faulty potentiometer(s) Replace and retest.

Poor through hole Solder Check all through hole solder connections,

particularly near the power supply area.

C4 Service Manual Confidential V1.01

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Alesis MICROVERB 4 Manuel d'utilisateur Page 4