Icom IC-PCR1500 Service Manual page 57

SECTION 10 BLOCK DIAGRAM
J3 IC3: XC6202P502
S1
DC-JACK
CPU5V
CPU5V
REG
POWER-SW
PWR
PWR
CTRL
Q4: 2SJ377
Q6: DTC144EU
MAIN-B PWR CONTROL
B+5V
PWR B+5V
CTRL REG
Q2002: 2SB1123 IC2006: TA7805
Q2001: DTC144EU
B+8V
B+8V
REG
IC2007: AN7708
A+5V
A+5V
REG
IC6: TA7805
A+8V
REG
IC7: AN7708
USB+3.3V
J2
VBAS
1
To the
2
D+/D–
PC
3
4
USB HUB
X1:
IC32: USB2502
CR-815 (24.000 MHz)
J5
6
6
5
5
4
To the
4
3
UT-122
3
2
2
1
1
Explanatory notes
+B LINE
RX LINE (PCR1500/2500)
RX LINE (PCR2500 only)
RX COMMON LINE
PCR 2500 only
APPWR VCC
CPU5V
IC2: BA6161F
D2: 1SS355 Q9: 2SC4617
+33V
AP5V RIPPLE
AP5V +33V RESET
REG REG FIL
Q2019: 2SB798 IC35: S-80942
Q2021: 2SC4116
Q5: 2SB1201
D2012: MA2S111
Q8: XP1501
CPU5V
L5V AF+9V
L5V AF+9V
REG REG
EEPROM
IC9: AN78L05
Q31: 2SB798
Q32: 2SC4116
IC14: 24LC512
IC1: S-812C33
OPPWR VCC
USB+3.3V
USB+3.3V
REG
D27: MA2S111
OP5V
OP5V
REG
PWR
USBPOW
Q2020: 2SB798 CTRL
Q2022: 2SC4116
D2013: MA2S111 Q33: UNR9214
–5V
–5V
DC-DC
MATRIX
IC8: PC1555
D14-D18, D20-D24:
D6: 1SS272
D36, D37: MA2S111
D8: MA8051
MA2S728
A+8V
CPU5V
REV.
PROTECT
VBAS
CTRL
USB+3.3V
USB+3.3V
D34: 1SS400
D+/D–
Q25: UNR9114 CPU5V
VBAS
Q26: UNR9214
USB-
CTRL
IC15: SN74LVC1G08
UART
BRIDGE
LEVEL
IC20: CP2101
CONV.
IC37: SN74LVC1G08
USB+3.3V
D+/D–
USBINSEL L5V L5V
USB-AUDIO
IC16:
USB
PCM2901E
AUDIO
Q2015:
SELECT
2SA1832
IC2038: L5V
SN74AHC1G66
X3:
CR-816 (12.000 MHz)
Q15:
2SA1832
J2010
J2008
BFDET
J8
FDET
AF+8V
S1: SW-168
J6
IC12:
LA4425A
SP-OUT / LINE
SELECT
ATT
SP1
LOGIC UNIT
10 - 1
RESET
CPU
IC18: M30624
Q2039:
UNR9214
OPTION
JUDGE
AP5V
AMP
OPTION
UT-122 UNIT
AMP
CPU5V
AP5V
TXD, RXD
FRONT/
APDATA BUFF
SELECT
Q2023: 2SA1832
D30, D33: 1SS400
IC40, IC41: SN74AHC2G53
BEEP L5V
Q12: 2SC4213
D28, D2029: 1SS400
AF SP ELEC.
AMP MUTE VR
L5V
IC17: SM6451B
SPMUTE APAFON
OPTION
UT-106UNIT
X4:
CR-816 (12 MHz) D26: HVC376
EXPAND
CLOCK
SHIFT
IC34, IC36: CD4094
L5V
IC19:
BU8872FS
FDET
DTMF
DEC
L5V
X2: 4.194304 MHz
IC2021: IC2021:
TONE VSC
LM2904 [1/2] LM2904 [1/2]
FIL. FIL.
L5V
IC21: TONE IC21:
VSC
LM2904 [1/2] FIL. LM2904 [1/2]
FIL.
OP5V
L5V
OPTION
IC2039: 232RX, 232TX
SN74AHC2G53
SMAD
UT-108/118 UNIT
SMETER
BSMAD
SELECT
IFOUTSEL IFOUTINH
APAFOUT
L5V
IC2028:
SN74AHC2G53
IFOUT
IFOUT
BIFOUT
SELECT
IFOUTSEL IFOUTINH
L5V
L5V
IC2023:
L5V
SN74AHC2G53
AF
AF
BPF
AMP
SELECT
Q2018:
2SC4617 IC2027: LM2904
BOPAFINH BOPAFSEL BAPAFINH
[ANA_AP/DV: SEL]
[AF-DIV.: OFF]
L5V
IC23:
L5V
SN74AHC2G53
L5V
AF
AF
SELECT
AMP
Q18:
BPF
2SC4617
OPAFINH OPAFSEL IC27: LM2904
[ANA_AP/DV:SEL]
[AF-DIV.:OFF] APAFINH
BFDET
FDET
L5V
OP5V IC2029:
SN74AHC2G53
FDET
DET
BUFF
BFDET
SELECT
Q2024:
2SA1832
FDETSEL FDETINH
L5V
IC2031:
SN74AHC2G53
APAFOUT
AF
BFDET
SELECT
BAPAFSEL
[FM/AP: SEL]
[DV/AM/etc: OFF]
BAFO
FROM
MAIN-B UNIT
L5V
IC4:
SN74AHC2G53
APAFOUT
AF
SELECT FDET
APAFSEL
[FM/AP: SEL]
[DV/AM/etc: OFF] AFO
FROM
MAIN-A UNIT