ARCAM hfe arcam alpha 10 dave service en free download

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ALPHA 10 DAVE MODULE SERVICE MANUAL Issue 1 May 99 Alpha 10 DAVE Module Service Manual the high switch on currents. It should be noted that the two switching regulators are fairly sensitive and disruption of Issue 1 Paul Newton/Richard Martin May 99 the 52kHz switching signal will may cause damage to both the Alpha 10 and the DAVE Module. CONTENTS Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Fan Control Circuit Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 The fan circuit is controlled by a temperature sensor (Z21), the output pins of which are normally high. There is Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 normally a voltage across the fan connected to SK19 but it is not normally enough to turn the fan motor. When the temperature rises above 55 deg.C (set by the resistor Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 network on Z21), the Out1 pin goes LOW and the voltage across SK19 is increased so that the fan motor will turn Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 over at a relatively low speed. To make sure the fan starts, the effect of C58 charging causes there to be approximately 12V across the fan. Out2 will go low at 65 deg. C and this informs the H8 micro as well as causing Summary the voltage across the fan, and hence the fan speed, to increase by switching Q6 on. If the the temperature of the Using the Alpha 10's modular design concept, the DAVE unit remains at this point for too long a period then the H8 Module is designed so that you can just plug it into an will intervene. It should be noted that this circuit is running existi