Kenwood NX-5800 Service Manual page 22

CN2
+B +B
F1
Q8, Q9, D11
5V Reg
IC8
5.4V DC/DC
BAT_CNT
from
Power management IC
(IC2)
F2
Q5, Q6
DC SW
SBC_2
F3
Q10, Q11
DC SW
Fig.4 Power supply circuit
1-22 (No.RA017<Rev.003>)
31BU
IC1
50BU
3.1V AVR
Q1, Q3
DC SW
/BINT
A1
54M
1.2V DC/DC
IC11
1.8V DC/DC
IC5
3.3V AVR
IC4
3.3V AVR
IC12
3.3V AVR
SBC_2
IC14
3.3V AVR
IC7
3.3V AVR
SD_EN
IC10
5V AVR
IC6
5V AVR
SBC_2
IC17
5V AVR
RXC
SB1
SB2
90C
IC15
9V AVR
TXC
ANTSW
IC3
1.2V AVR
SCTAM1
12M
18M
IC9
DC SW
33A
33M
18M
33A
33M
33C
33OPT
18M
33SD
50A
33M
50C
IC13
20V DC/DC
50CS
Q112 Ripple
DC SW Filter
/SAVE
Q81
DC SW
50R
54M
Q15, Q16
90T
DC SW
Q17, Q18
90ANT
DC SW
50CT
IC16 Q14
5V AVR DC SW
ASSW
RF Power Module
Power management IC
12BU
MPU/DSP RTC
Option Board
MPU/DSP Core
MPU/DSP PLL
MPU/DSP I/O(B), DDR
Mobile DDR2, Clock buffer
SUB (Display) unit
18M_3
Flash ROM V(I/O) & 3 state(512M)
CODEC DVDD
MPU/DSP I/O(A,C) DVDD,
USB_VDDA33
Flash ROM, I/O Expander, ADC,
CODEC
19.2M TCXO circuit, Uart SW, RS-232C
8bit/8ch DAC
12bit/4ch DAC
CODEC AVDD,DRVDD
PLL, IF
Option Board
microSD
I/O Expander, D-sub level shift.
8bit/16ch ADC AVCC
OP amp for VREF/25REF
MPU/DSP USB_VBUS
SP GND switch driver
PLL, IF, 2nd VCO
VCO Assist
200C
Frontend Tuning
TX/RX VCO
VCO buffer Amp
VCO Common Amp,
Fin Amp
Fin filter switch
TX Heter SW
RX Heter SW , Local Amp
LNA, 1st Mixer, IF Amp
Power management
SUB (Display) unit
Module (BT/GPS) unit
D-sub 25
SUB (Display) unit
Audio Power Amp
TX circuit
Antenna switch
TX PreDrive(MMIC)
Power - Control IC