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Modification of the HDSP PCI card - Self Oscillation In some rare cases, the combination Hammerfall DSP System Multiface and HDSP PCI card can suffer from self-oscillation. This error can be identified easily:
The problem is caused by a diode in the power
supply section of the PCI card. When this component does not match the expected
characteristics (voltage drop about 1 Volt instead of 700 mV), the voltage
regulator feeding the Multiface will begin to oscillate. The problem can
be fixed with simple means in two ways: |
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A second diode, type 1N4148, will be soldered in parallel to the existing diode VD1 (type LL4148). | |
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The existing diode VD1 will be replaced through a 1N4001 (up to 4007). | |
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RME continues the strategy of releasing all information to the customer. We are not giving this information here because we want you to modify the PCI card on your own, but because we are aware of the fact that exchanging the PCI card will need a certain time in some cases, whereas any competent technician can do the modification within less than 5 minutes. | ||
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