Icom IC-PCR1500 Service Manual page 8

SECTION 2
LOGIC UNIT
TOP VIEW
AF amplifier
(IC12: LA4425A)
AF +8V regulator
(Q5: 2SB1201, Q8: XP1501)
+33V regulator
( )
IC2: BA6161F
D2: 1SS355
VSC/TONE filter
(IC2021: LM2904)
IC-PCR2500 only
AF selecter
(IC2023: SN74AHC2053)
IC-PCR2500 only
BOTTOM VIEW
A+5V regulator (IC6: TA7805)
A+8V regulator (IC7: AN7708)
B+5V regulator (IC2006: TA7805F)
IC-PCR2500 only
B+8V regulator (IC2007: TA7708SP)
IC-PCR2500 only
INSIDE VIEWS
USB +3.3V regulator
(
IC1: S-812C33
Q31: 2SB789
USB HUB
Q32: 2SC4116
(IC32: USB2502)
USB audio IC
(IC16: PCM2901M)
Electric VR
(IC17: SM6451B)
)
VSC/TONE filter
(IC21: LM0904)
AF selecter
(IC23: SN74AHC2053)
AF amplifier
(Q18: 2SC4617)
AF amplifier
(Q2018: 2SC4617)
IC-PCR2500 only
Clock oscillator (X2: CR-818 4.19304 MHz)
CPU reset IC (IC35: S-80942)
CPU (IC18: M30624FGPGP)
DTMF decoder (IC19: BU8872FS)
2 - 1
L5V regulator
(IC9: AN78L05)
CPU5V regulator
(IC3: XC6202P502PR)
VCC line controller
(
Q4: 2SJ377
Q6: DTC144EU
−5V regulator
(
IC8: µPC1553
D6: 1SS272
D8: MA8051
SP mute switch (Q12: 2SC4213)
)
)