User Manual

Unit 3 – Channel UP Converter
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8. UP Converter supply -12, +12 and +24V:
8.1. Function:
The power supply function is to generate -12V, +12V and +24V voltage suitable to supply the UP
Converter.
8.2. Technical Description:
The main AC input voltage is reduced by the transformer T1.
T1 has two secondarie winds, one for the +24V and the second for the +12V and –12V supplies.
D1, D2, D3 and D4 rectifiers the secondary voltage that is filtered by the capacitor C1. IC1 is a
linear regulator that feeds +24V at the output.
D5 and D6 are the retifier diodes for the positive voltage filtered by C4.
IC2 is a linear regulator for the +12V output supply.
In the same manner there are a rectifier and a linear regulator for the negative voltage –12V.