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Nokia Customer Care Model 3520 Schematics / Layouts RH-21
Circuit Diagram of Baseband
ACCDIF(2:0)
F100 L100
MODEL "RF-SIGNALS"
RFICCNTRL(2:0)
1.5A 42R/100MHz RFICCNTRL(2:0)
V100 C105
1PMT16AT3 1n0 "SPEAKER" SLOWAD(6:0)
B301
R157 AUDIO(0) PUSL(2:0)
PRODTP7 2
"MBUS" RFCONV(9:0)
R101 1 1 /2 10R RFCONV(9:0)
ACCDIF(0) AUDIO(1)
1 /4 100R 2 /2 10R C151
R162 AUDIO(2) RFAUXCONV(2:0)
R157 C172 C173 33n
27p 2k2
27p C170 R159
GND GND R166 27p AUDIO(3) RFCLK R320
L151 22k
PRODTP3 2k2
R156 C152
AUDIO(4) GENIO(28:0) 100R
"FBUSRXO" 33n
R101 600R/100MHz 2k2
ACCDIF(2) C168 GND
C162
22p C157 C169 C312
2 /4 100R 1n0 C174 VBAT C313
22p 100p 100n VBAT 1u0
R102 1u0
GND GND GND D200
220k GND GND UEMK_V4.4_WDOGS_ENABLED
D2
C1
C7
E1
A5
B2
A1
A7
B6
PRODTP2 R153 R200 GND GND
XAUDIO(3) M9 N10
VCHARIN1 VCHAROUT1
GND "MICB2" P9 P10 C320
1k0 C159 VCHARIN2 VCHAROUT2 0R22
"PWR_KEY" L6 L9 1u0
GND
VIN
ISET
C2-
C2+
C1-
C1+
SD
BRGT
X100 PRODTP7 R154 100p VCHARINK VCHAROUTK
"CLOSE TO X100" XAUDIO(0) LM2795BLX
not assembled "FBUSTXO" "HEADINT" S300
C160 VBAT VBAT D5 TESTMODE VBATREGS M10
R199
a
R101 10k GND D320
"BOTTOM CONNECTOR" ACCDIF(1) 1u0 GNDREGS L10
R301
POUT
C156 C315 P8 VBATBB1 C201 C202
3 /4 100R L152
D4
D3
D2
D1
0R R152
b
MIC+ 100n XAUDIO(4) 22p N9 M7 1u0
1 VBATBB2 PWMO 10n
MIC- IND "MIC2P" 4k7
2 N11 VBATBB3 PWM1C P4
600R/100MHz 1 /2 1k0
C163 C153 N14 VBATBB4 CHDISX M5
GND C175 R164 C262 C264
D6
E7
E5
E3
A3
DC+ 1n0 27p 47k A1
3 1n0 C176 B200 4u7 1u0 VBATBB5
DC- 22p GND 32.768kHz
4 C155 VANA N8 VANA
L158 R152 XAUDIO(5)
DC_CRL
5 100n P7 PWRONX VFLASH1 M8 VFLASH1
IND "MIC2N" P11 C311
600R/100MHz 2 /2 1k0 VFLASH2 VFLASH2
XMICP C164 C165 C209 C210 P1 M13 1u0
6 R150 OSCIN VCORE VCORE
XMICN 1n0 27p 10p 10p P2 B1
7 C177 1k0