Motorola MTR2000 T5544 Instruction / Field Service Manual page 191

68P81096E32-E
08/06/07
+14.2 V and +5V from the power supply (via the backplane) are used as sources
for the following supply voltage circuits:
• +15 V Regulator Circuitry – voltage doubler circuit accepts +14.2 V input
and feeds +15 V regulator to provide +15 V for the Receiver and Exciter
modules.
• +12 V Regulator Circuitry – accepts input from the +15 V regulator to gen-
erate the voltage required (under Host μP control) for powering the Flash
memory device during programming and erasing cycles.
• +5 V Regulator Circuitry – provides VCCA (analog +5 V) for the Audio
Processing circuitry in the SCM.
• Filtering Circuitry – filters the +14.2 V and +5 V from the power supply (via
backplane) to provide +14.2 V and VCC (digital +5 V) for the SCM digital
circuitry.
Station Control Modules
13