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3/4

+3.3V

(a)

Q117

(
(b) (c) (d) (e) (f) (g) (h) (i)
D[12] D[13] D[14] D[15] D[8] D[9] D[10] D[11] )
R193

)

NC
+3.3V

IC112
1 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 20 19 18 17 16 15 14 13

C210

( ) NC SERIAL_SW
CDLTXD CDLRTS RA126 NC 1 8 2 7 6 3 5 4

(

NC

2 3 4 5 6 7

TP_RTS

CDLRXD

0.63A

F105

RXD RTS CTS TXD

+24V

CDLCTS

8 9 10

CN112
D111
1 PICK 2 GND

TO FLASH PROGRAMMER
+5VD

12 11

TO PICK_UP

R263 NC

NC

PICKUP

R232

1K

Q122

) (
4.7K

47K

47K

47K

CN109
+5VD 1

+5VD
PG

R187

R192

R226

RXD 3 RTS 4 CTS 5 DSR 6

R239

THRM2 2 KSTART 3

100 R255

0
KTXD 4 KSCLK 5 OPERST 6 GND 7

100 100 C224 J180p 180 1K

R212 R213 R214

L142 L143 L144

KSTART KTXD KSCLK OPERST

FANON2

Q118

R235

4.7K 1/4W

(k)

GND 8

(m)
D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

C232
+5V 8

L145 R215 +5VD

R240

R250

TO OPE
K1000p F39K R219 C236

R227 ADSEL2 F33K R228 1K

FANON1 FANDET

Q119

4.7K 1/4W

Q121 R238 100

R246 39 1/2W

10K

(n)

C328 J100p

Z0.1u R236

10K

270 +5VD

0

R249

(j)

DTR 7

10K

1 2 3 4

1 2 3 4

8 7 6 5

CN110
RPS 1

10K

TXD 2

R194

RA120 8 7 6 5

RA125 100 C327 J100p R217

+24V

RPS

Q120

3

FANON FANDET GND

8 7 6 5 8 7 6 5

C244

1 RA121 2 NC 3 4 1 RA123 2 NC 3 4

K1000p C237

F39K R220

+3.3V

TO THERMISTOR &

C249

AIN3

35V100u

2 1

K1000p

TO FAN

CN113

C201 NC

+5VD

NC ( ) NC ( )

(
+3.3V
37 38 39 40 41 42 43 44 45 46 47 48

)
36 35 34 33 32 31 30 29 28 27 26 25

R244

C211

C213

R222

GND IOVCC D11/P3 D10/P2 D9/P1 D8/P0 D7 D6 D5 D4 D3 D2

F22K

F22K R223

A[0]
USB_INT

1:4D

COLEVCC GND DD+ VBUS TRDN TEST DAOK1 DREQ1 TC1 INT1/SOF IOVCC

XUSBRST

1:4E C196

R218

NC

NC ) NC ) NC )

R245

330

R225 K1000p C238 5.6K

R202

J100p

R199

X104

1 2 3 4 5 6 7 8 9 10 11 12

R209

(LightBlue)

C329

+3.3V

POUT

REGIST
C241

R231 K4700p

5.6K
1

(

(

(

C216

C207

( ) NC

(p)

(q)

NC CN108
VBUS 1

( ) NC

PS102 3 PB1

27K

D12/P4 D13/P5 D14/P6 D15/A0 HWR/BYTE INT0 RD LWR CS RST DREQ0 DACK0

NC

K1000p

LED 3 POUT 4 CTL 5

F18K R224

C240

IC110

56K

D1 D0 A6 A5 A4 A3 A2 A1 COREVCC GND XIN XOUT

24 23 22 21 20 19 18 17 16 15 14 13

R185

)

L138

PAPER
K1000p C242 K1000p

R230 5.6K
1 2

NC

A[6] A[5] A[4] A[3] A[2] A[1]
C215

D110

( ) NC

CN111
THRM1 1

C239

BEAD L139

PS101 3 PB1

(

56K

HAISHI SENSOR

ADSEL1

GND 2

+5VD

R229 AIN2 1K

PAPER SENSOR
R233 330
4

BEAD L140 BEAD

LEDCTL

+5VD

( ) NC

( )

REGIST SENSOR
R234 240 +5VD
2 4

R195 R196

(

NC ) NC ) NC ) NC NC NC ( ) ( ) ( )

SENCTL0

SENCTL1

D- 2 1 2 D+ 3 GND 4

( (

R197 DA101

+5VD R247 56K

)

C203

C204

NC

C205

NC

L130

3

L151
PG

Z0.1u

C251

CN114
1 +5V 2 TNREMP

(

TNREMP
R237 K1000p C243 5.6K
3 GND

D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

(40) (42) (39) (41) (43)

(45)(47) (49) (51) (44) (46) (48) (50)

A[0] A[1] A[2] A[3] A[4] A[5]

(53)(55) (57) (52)(54)(56)

(58) (59)

(60)

KX-FL403FX DIGITAL BOARD (3/4)

(39) (41) (43) (40) (42)

(44) (46) (48) (50) (45)(47) (49) (51)

(52)(54)(56) (53)(55) (57)

(58) (59)

(60)

4/4
+3.3V R198 4.7K +3.3V

NC

C202

(r)

4 3 RA122 2 100 1 4 RA124 3 100 2 1

C256 Z0.1u C257 Z0.1u

J33p

+3.3V C193

C206 Z0.1u

C208 Z0.1u

)

R204

) NC

C258 Z0.1u

+4VD C250 Z0.1u

+5VD

(

+24V Z0.1u

(

C194 K4700p

(s)

L133 L136 L137

Z0.1u

5 6 7 8 5 6 7 8

0

R186

10K

0

L153

C252

C253

L150

L154

CN115
1 2 3 24V BREAK/CDL_RXD +5VA SP_MUTE AG VOL0/MURA1 DG VOL1/F_MUTE DG

IRQn 100 RESETn 99 D7 98 D6 97 D5 96 D4 95 D3 94 D2 93 D1 92 D0 91 VDD90 90 VSS89 89 VSSo88 88 VDDo87 87 A0 86 A1 85 A2 84 A3 83 A4 82 SPRn 81

C199 Z0.1u

+3.3V R261
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51

BREAK
C316 R221 100 R210
J100p

C200 Z0.1u

TP_XCLK

R188

100 100

32.256MHz

(w)

L132 R190 R191 K1000p 100 100

R205 0 R207 47K

C233

(v)

L131

X105

IC111

C225 J10p C226 J12p

( )

(u)

R189

(x) (z) (y) (A) (B) (C) (D) (E)

31 32 33 34 35 RESERVED35 36 RESERVED36 37 RESERVED37 38 RESERVED38 39 RESERVED39 40 RESERVED40 41 RESERVED41 42 RESERVED42 43 RESERVED43 44 RESERVED44 45 RESERVED45 46 IA_AVSS46 47 IA1_RXP 48 RESERVED48 49 IA1_HSMICP 50 IA1_HSMICM

NC ( )

C228 K0.1u

D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]

C234 16V10u

( ) NC

C229 K0.1u

Z0.1u

C235

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

NC

C230

WRn VSS1 RDn VDD2 CSn VSSo3 VDDo77 VDDo4 EYEXY/XCLK AVDD RESERVED6 32.256MHz ENABLE_VREG18D VBG RESERVED7 AVSS PIA_RESETn VSSo72 PIA_STROBE/EYESYN VSS71 PIA_TXSIN PIA_RXOUT VDD70 XTLO PIA_CNTRL_SIN XTLI/CLKIN PIA_CLKIN TEST PIA_SCLK/EYECLK GPI2 IA1_SCLK IA1_CLKIN GPI1 GPI0 IA1_CNTRL_SI GP02 IA1_TESTCN GPO1 IA1_RXOUT RINGDn IA1_TXSIN IA1_STROBE IA_VDD IA1_AVDD IA1_RESETn IA_AVSS59 IA1_SPKRM RESERVED23 IA1_VC IA1_SPKRP IA_AVSS IA1_BG IA1_TXP RESERVED25 IA1_HSMIC_BIAS RESERVED55 RESERVED26 RESERVED27 RESERVED28 RESERVED29 RESERVED30

4.7K

(t)

MDMCS

SP_MUTE
C309
J100p

L152

4 5 6

C218 Z0.1u C219 Z0.1u
R206

C227 Z0.1u C231 Z0.1u

0

VOL0/MURA1
C307
J100p

BEAD

7

NC

220

VOL1/F_MUTE
C306
J100p

8 9

10 -5V

-5V

11 +4V 12 VOL2/CRESET

VOL2/CRESET
L135 L141 C308 J100p

C197

R183

2.7K

R211

C221

( )

C220 Z0.1u

FAX RX
MODEM_RX_IN P_SHORT
0 C323
J100p

13 +4V 14 MODEM_RX_IN 15 P_SHORT/T-ON_OFF

NC

TONE DCN

C245

Z0.1u

R248
16 TONE

0 C317 J100p

( )
C217

FAX TX

17 DCN 18 MODEM_TX_OUT 19 LIN_RLY/T-PAT1 20 NC 21 CID_RLY/T-PAT0 22 VOX/NISHI1 23 BELL

LIN_RLY CID_RLY VOX/NISHI1 BELL MIDATA POL_N MICLK
C319 J100p C305 J100p C320 J100p L149 BEAD R243 180 R242 180 R241 180 C246 CDLTXD CDLRXD CDLRTS CDLCTS J180p RA127 1 8 2 7 3 6 4 5 C248 J180p C318 J100p

RESERVED31 RESERVED32 RESERVED33 RESERVED34

K0.1u

C212

C223

C222 0

R208

L146 R216

K0.1u

C192

+5VD K0.1u K0.1u C209 C326 R184

(

NC

0

BEAD

)

24 MIDATA/CDL_RTS 25 EXTHOOK/PLO_N 26 MICLK/CDL_CTS

10

R182

R200

R264

10K

IC109
C195 16V10u C198 Z0.1u
1 2 INPUT NC VDD NC 16 15 14 13 12 11 10 9

HS_ALC/POL_P
R203 C214 Z1u L134 BEAD

C321 J100p L148 BEAD C322 J100p L147 BEAD

0

0

C247

J180p

27 HS_ALC/POL-P 28 MILATCH/CDL_TXD

MODEM_RX_IN

MILATCH

( ) NC 3.3K

D109

X103

3 4 5 6 7 8

OSCOUT ESt NC NC OSCIN NC GND NC NC ACK NC SD

(

R201

10K

)

TO ANALOG

NC

NC MODEM_RX_IN

(F) (H)

(G) (J)

KX-FL403FX DIGITAL BOARD (4/4)