Icom IC-PCR1500

4 - 6
4-4 POWER SUPPLY CIRCUITS
VOLTAGE LINE DESTINATION VOLTAGE LINE DESTINATION
HV Same voltage as the connected power supply. AP5V Optional UT-122.
AF+8V AF power amplifi er (IC12). OP5V Optional UT-108/UT-118.
L5V
Electric volume (IC17), tone fi lter (IC21), AF switch
(IC4, IC23), etc.
A+5V
MAIN-A UNIT.
+33V Loop fi lter (MAIN-A/B UNITS; Q35, Q36). A+8V
USB3.3V USB HUB (IC20, IC32), USB audio IC (IC16). –5V AGC amplifi er (MAIN UNIT; IC25).
VOLTAGE LINE DESTINATION
DPLL3.3V Down converter circuit; PLL IC (IC4).
D3.3V
Down converter circuit; mixer (IC6), RF ampli-
fi er (IC15), etc.
PLL3.3V 1st and 2nd PLL circuits; PLL IC (IC10, IC13).
5V Divider (IC11), reference oscillator (X1), etc.
DVCO5V
Down converter circuit; VCO (Q19, D43), buf-
fer (Q14), etc.
VOLTAGE LINE DESTINATION
BPLL3.3V 1st and 2nd PLL circuits; PLL IC (IC10, IC13).
B1/2 5V Divider (IC11).
*PCR2500 only