KX-TDA6174XJ, KX-TDA6174X - Panasonic PBX Service Manual (repair manual). Page 13

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6
 BLOCK
DIAGRAM
KX-TDA6174XJ/KX-TDA6174X ESLC16 CARD BLOCK DIAGRAM
DC Feedin g(+30V)
Surge
EMC
PFT Relay Diag Relay
DC Feedin g(GND)
Hook-Det
&
Ringtrip-Det
Bell/Diag 
Relay Driver
Tip
Ring
CH_SEL
FH
Diag-Tip,Diag-Ring
#HOOK0
BELL0
DIAG0
+40V
20Hz/25 Hz Signal
IC14
ASIC
Ringer(75Vrms)
Port#1
nRESET
P26
P0[7:0]
P4[7:0]
TOE[15:0]
P24,25,27
LD[7:0]
FH,HWCLK, DHW,UHW
IC1
DTMF
REC
#TOE0
D[7:0]
A[12:0]
nRD
nWR
nIRQ
PFRLY
HWCLK
DHW
UHW
P1[7:0]
IC9
RESET
IC
nRESET
JUMPER
MODE[5:0]
XTAL/X1
16.384MHz
PLL
IC201
CODEC
PEB
2466
Balance
Network
(BN)
Same as "Port#2".
Same as "Port#2".
Port#3
Port#4
PFT
Jack#1
PFT
Jack#2
Same as "Port#2".
(No PFT Interface)
Port#5 ‘#8
IC202
CODEC
PEB
2466
Port#9 ‘#12
IC250
CODEC
PEB
2466
Port#13 ‘#16
+5V
+3.3V
+15V
Power
Supply
IC251
CODEC
PEB
2466
DIN
DOUT
CS[3:0]
DCLK
nRST
 Power
Supply
On-Board
Ringer
PFT
Relay Driver
+15V
PFRLY
Bell Relay
MWRLY0
DC Feeding(+30V)
Surge
EMC
PFT Relay
DC Feeding(GND)
Hook-Det
&
Ringtrip-Det
Bell/Diag 
Relay Driver
Tip
Ring
Port#2
IC1
DTMF
REC
Balance
Network
(BN)
Bell Relay
MWRLY1
DIAG1
BELL1
#HOOK1
Same as "Port#2".
(No PFT Interface)
Same as "Port#2".
(No PFT Interface)
+15V
nRESET
nRESET
STD0
LD[3:0]
STD1
#TOE1
LD[3:0]
DIN
DOUT
CS[0]
DCLK
DOUT,DIN, DCLK,CS[1]
DOUT,DIN, DCLK,CS[2]
DOUT,DIN, DCLK,CS[3]
JUMPER
IC601
LPR
A[22:0]
D[15:0]
nRD
nWR
XTAL/X601
12.288MHz
nCS[2:0]
BOARD
ID
3
nRESET
nIRQ2
nIRQ1
nIRQ0
nBREQ
nBACK
NMI
nWDTOVF
IC602
Flash
ROM
IC603
RAM
nWR
nRD
nRD
nCS
nCS
A[19:0]
A[17:0]
D[15:0]
D[15:0]
nWR
nRESET
nBREQ
nBACK
nIRQ
nCSI
nCS1 
nCS0 
nCS2
nRESET
nRST
nRST
EC_CLK
nSYSTE _RST
EC_AD[15:0]
EC_BE[1:0]
EC_PAR
EC_FRAME
EC_TRDY
EC_STOP
EC_IDSEL
EC_PERR
EC_INT
Bell SYNC
Bell SYNC
nHALT
CT_C8_A
CT_FRAME_ A
CT_NETREF
CT_D[7:0]
B
A
C
K
B
O
A
R
D
13
KX-
TDA6174XJ
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KX-
TDA6174X

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