Panasonic KX-TA308 User manual

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Service Manual
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ORDERNO.KMS0401890C1
F19
AdvancedHybridSystem
lKX-TA308
(forU.S.A.)
©2004 Panasonic CommunicationsCo., Ltd.All rightsreserved. Unauthorizedcopying and distribution isaviolation of law.
IMPORTANTINFORMATION ABOUTLEADFREE,(PbF), SOLDERING
If leadfreesolderwasusedinthemanufactureof thisproduct theprinted circuit boardswill bemarked PbF.
Standard leaded, (Pb),solder canbeused asusual on boardswithoutthePbFmark.
Whenthismark doesappearpleasereadand followthespecial instructionsdescribedinthismanualon theuseof PbFand howit mightbepermissible
to usePbsolder during serviceand repair work.
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7SYSTEMCONNECTIONDIAGRAM
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Note:
lItisrecommended that theextension of jack01 isadisplay proprietary telephone.
lParallel connection telephonesispossible.RefertoInstallation Manual.
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CO1 EXT1
EXT2
EXT3
EXT4
EXT5
EXT6
EXT7
EXT8
CO2
CO3
CALL ID CARD
DTMF
Generator CO G/A
IC130 IC205
IC104
IC105
IC120
IC121
IC111
IC100
IC101 IC102
X300
IC304
T301
IC305
IC500
IC501
IC502
PAG
BGM
POWER unit
BELL signal
AC input
BELL
AMP
RS232C
AC80V
+26V
+5.8V
EXT G/A
4bit
CPU
CPU
16bit
ROM
4M RAM
1M
CLOCK
4MHz
CLOCK
24MHz
CROSS
POINT
PULSE
TRANS-
FORMER
DTMF
Receiver 1
DISA DTMF
Receiver 1
DISA DTMF
Receiver 2
DTMF
Receiver 2
DOORPHONE/DOOR OPENER CARD
3 CO/8 EXT (HYBRID) CARD

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9.2DOORPHONE/DOOROPENERCARD
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9.3CALLERID/VMM CARD
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9.4POWERUNIT
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(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
CN30A
1H 4L
CN30A
2T 3R
L302A
0
L303A
0
L305A
1.5mH
L300A
0
L301A
0
ZNR32A
39V
C324A
1
IC303
13 1
14 2
15 3
12 4
15
56
27
486
INH
8
VSS
7
VEE
16
VCC
9
C
10
B
11
A
3
CON
RLY30A
98
10
ZNR31A
39V
T300A
3
16
4
C322A
2.2
C320A
0.022
C321A
0.022
Q301A
R301A
47
R341A
68
+24V
R342A
15K
R303A
47
R310A
10K
R340A
68
Q304A
C330
0.022
+12V
R302A
10K
D302A
2V
D303A
2V
R313A 1
L302B
0
T300B
3
16
4
D302B
2V
C324B
1
R301B
47
C320B
0.022
R342B
15K
CN30B
1H 4L
Q304B
ZNR32B
39V
ZNR30B
39V
R341B
68
C321B
0.022
+24V
L303B
0
R302B
10K C322B
2.2
L305B
1.5mH
L302C
0
T300C
3
16
4
D302C
2V
C324C
1
R301C
47
C320C
0.022
R342C
15K
CN30C
1H 4L
Q304C
ZNR32C
39V
ZNR30C
39V
R341C
68
C321C
0.022
+24V
L303C
0
R302C
10K C322C
2.2
L305C
1.5mH
L302D
0
T300D
3
16
4
D302D
2V
L300D
0
C324D
1
R301D
47
C320D
0.022
R342D
15K
CN30D
1H 4L
Q304D
ZNR32D
39V
ZNR30D
39V
R341D
68
L301D
0
CN30D
2T 3R
C321D
0.022
+24V
L303D
0
R302D
10K C322D
2.2
L305D
1.5mH
L302E
0
T300E
3
16
4
D302E
2V
L300E
0
C324E
1
R301E
47
C320E
0.022
R342E
15K
CN30E
1H 4L
Q304E
ZNR32E
39V
ZNR30E
39V
R341E
68
L301E
0
CN30E
2T 3R
C321E
0.022
+24V
L303E
0
R302E
10K C322E
2.2
L305E
1.5mH
RLY20A
48
6
CN30B
2T 3R
L301B
0
L300B
0
CN30C
2T 3R
L301C
0
L300C
0
R306A
27K
+-
RLY30A
12 1
R311A
47K
C314A
0.039
D310A
+24V
R315A
1W1K
Q305A
+5V
R305A
56K
R304A
6.8K
Q307A
R340B
68
Q301B
R310B
10K
ZNR31B
39V R303B
47
D303B
2V
R340C
68
Q301C
R310C
10K
ZNR31C
39V R303C
47
D303C
2V
R340D
68
Q301D
R310D
10K
ZNR31D
39V R303D
47
D303D
2V
R340E
68
Q301E
R310E
10K
ZNR31E
39V R303E
47
D303E
2V
D204
+24V
Q209
RLY20A
16 1
ZNR30A
39V
D306A
R305B
56K
+-
RLY30B
12 1
D310B
Q307B
R311B
47K
Q305B
D306B
C314B
0.039
R306B
27K
R304B
6.8K
+5V
R305C
56K
+-
RLY30C
12 1
D310C
Q307C
R311C
47K
Q305C
D306C
C314C
0.039
R306C
27K
R304C
6.8K
+5V
R305D
56K
+-
RLY30D
12 1
D310D
Q307D
R311D
47K
Q305D
D306D
C314D
0.039
R306D
27K
R304D
6.8K
+5V
R305E
56K
+-
RLY30E
12 1
D310E
Q307E
R311E
47K
Q305E
D306E
C314E
0.039
R306E
27K
R304E
6.8K
+5V
R315B
1W1K
R315C
1W1K
R315D
1W1K
R315E
1W1K
RLY20A
13 9
11
RLY30A
45
3
+24V
+24V
+24V
+24V
R316A
2W/100
R316B
2W/100
R316C
2W/100
R316D
2W/100
R316E
2W/100
RLY30B
98
10
RLY30C
98
10
RLY30D
98
10
RLY30E
98
10
RLY30B
453
RLY30C
453
RLY30D
45
3
RLY30E
45
3
R1
T1 Q313A
R317A
3.9
R317B
3.9
Q313B
R317C
3.9
Q313C
R317D
3.9
Q313D
R317E
3.9
Q313E
VAG
VAG
VAG
VAG
VAG
R313B 1
R313C 1
R313D 1
R313E 1
R313F 1
R313G 1
R313H 1
D301A
D300A
D300B
D301B
D300C
D301C
D300D
D301D
D300E
D301E
C323A
NO MOUNT
C323B
NO MOUNT
C323C
NO MOUNT
C323D
NO MOUNT
C323E
NO MOUNT
D307A
D307B
D307C
D307D
D307E
D308A D308B
D308C D308D
D308E
D308F
D308G
D308H
+12V
R312A
OPEN
R312B
OPEN
R312C
OPEN
R312D
OPEN
R312E
OPEN
EXT2
EXT3
T1
R1
HOOK1
BELL
BELL
EXT5
BELL
EXT4
BELL
BELL
BELL1
BELL2
HOOK2
BELL3
HOOK3
BELL4
HOOK4
BELL5
HOOK5
TXPOWER
TXPOWER
TXPOWER
TXPOWER
TXPOWER
EXT1
TXD2
TXD3
TXD4
TXD5
TXD1
RXD
RXD
RXD
RXD
RXD
EXT1
EXT2
EXT3
EXT4
EXT5
KX-TA308 MAIN BOARD NO.1 (1/2)
DC CUT CAPACITOR
PROTECTOR
DC POWER
SUPPLY CIRCUIT
POWER FAILURE RELAY SW
BELL
CIRCUIT
P.F.
RELAY
BELL SIGNAL AC80V
VOLTAGE LIMITER PROTECTOR 6V
6V
0V ANALOGUE SW
OVER CURRENT DETECT
PROTECTOR
5V ON HOOK
H=BELL ON
L=BELL OFF
BELL RELAY SW
HOOK DETECT
CIRCUIT
OFF HOOK
0V
+26V

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
T301
2
4
6
7
9
10
R318
330
ZNR33
R343
2.2K
R348
100
C325 1
+5V
Q308 IC302
1
2
3
R346
10K R347
10K IC302
5
6
4
C329
100P
D391
R344
4.7K
Q306
R345
1K
IC302
12
13 11
IC302
9
810
Q309
R392
0
R393
4.7K
Q311
C331
0.022
+24V
+5V
+5V
IC302
14
7
+5V
C328
0.022
L302H
0
T300H
3
16
4
D302H
2V
L300H
0
C324H
1
R301H
47
C320H
0.022
R342H
15K
CN30H
1H 4L
Q304H
ZNR32H
39V
ZNR30H
39V
R341H
68
L301H
0
CN30H
2T 3R
C321H
0.022
+24V
L303H
0
R302H
10K C322H
2.2
L305H
1.5mH
C324F
1
L302F
0
Q304F
L303F
0
+24V
L301F
0
L300F
0
R302F
10K
R301F
47
CN30F
2T 3R
R342F
15K
D302F
2V
CN30F
1H 4L
ZNR32F
39V
L305F
1.5mH
ZNR30F
39V
T300F
3
16
4
C321F
0.022
R341F
68
C322F
2.2
C320F
0.022
C324G
1
L302G
0
Q304G
L303G
0
+24V
L301G
0
L300G
0
R302G
10K
R301G
47
CN30G
2
T3
R
R342G
15K
D302G
2V
CN30G
1
H4
L
ZNR32G
39V
L305G
1.5mH
ZNR30G
39V
T300G
3
16
4
C321G
0.022
R341G
68
C322G
2.2
C320G
0.022
+5V
IC304
P72 1
P71 2
P70 3
P11 36
P00 32
X1 21
P13 33
P81 27
P51 10
P53
8P52
9P03
29 P02
30
P41
15 P22
41
P80
28 P12
35
P33 23
P32 24
P10 37
P23 40
P73 44
P50 11
P01 31
XT1
18 XT2
19 VEE
17
VCC
38 VDD
39
NC
12 NC
34 P40
16
P43
13 P42
14
P31
25 P30
26
P60 7
P61 6
P62 5
P63 4
X2 22
RESET
20
P21 42
P20 43
R340F
68
Q301F
R310F
10K
ZNR31F
39V R303F
47
D303F
2V
R340G
68
Q301G
R310G
10K
ZNR31G
39V R303G
47
D303G
2V
R340H
68
Q301H
R310H
10K
ZNR31H
39V R303H
47
D303H
2V
IC305
P10
13 P11
14 P12
15 P13
16 P14
17 P15
18 P16
19 P17
20
P20
21 P21
24 P22
25 P23
26 P24
27 P25
28 P26
29 P27
30
P30
36 P31
37 P32
38 P33
39 P34
40 P35
41 P36
44 P37
45
P40
46 P41
47 P42
48 P43
49 P44
50 P45
51 P46
53 P47
54
P50 55
P51 56
P52 57
P53 58
P54 59
P55 60
P56 61
P57 64
VSS 2
VSS 12
VSS 23
VSS 63
D0 68
D1 69
D2 70
D3 71
D4 72
D5 74
D6 75
D7 76
VDD 33
VDD 73
NC 3
NC 22
NC 62
NC 43
P00
4P01
5P02
6P03
7P04
8P05
9P06
10 P07
11
A0 77
A1 78
A2 79
A3 80
RD 66
WR 65
CS 67
RST 1
P60 31
P61 32
P62 34
P63 35
VSS 52
VSS 42
+5V
C300
0.022
+5V
R324
47K
R27247K
+5V
R326
47K
R305F
56K
+
-
RLY30F
12 1
D310F
Q307F
R311F
47K
Q305F
D306F
C314F
0.039
R306F
27K
R304F
6.8K
+5V
Q307G
+-
RLY30G
12 1
R305G
56K
C314G
0.039
R304G
6.8K
+5V
Q305G
D310G
R306G
27K R311G
47K
D306G
Q307H
+-
RLY30H
12 1
R305H
56K
C314H
0.039
R304H
6.8K
+5V
Q305H
D310H
R306H
27K R311H
47K
D306H
R315F
1W1K
R315G
1W1K
R315H
1W1K
R327
47K
X300
4MHz
C33315P
C33415P
+24V
+24V
+24V
R316F
2W/100
R316G
2W/100
R316H
2W/100
R329 330
R110 330
R322 330
R370 330
R371 330
R372 330
R373 330
R374 330
R375 330
CN2
10
EXP08CARD
R288
330
R103 330
R102 330
R101 330
R100 330
R99 330
R98 330
R97 330
R96 330
R95 330
R94 330
R93 330
R92 330
R91 330
R90 330
CN4
24 DISACARD
5 CE2
4 P/R2
6 RESET2
7 STD10
2 EOM2
1 VOX2
3 CNG2
9 CE1
11 P/R1
12 RESET1
8 STD9
10 EOM1
13 VOX1
14 CNG1
R166 47K R167 47K R21 47K R165 47K R19 47K R168 47K
+5V
R20
47K
R22
47K
+5V
R328
47K
R352 47K
+5V
R353 47K
R351 47K
R350
47K
RLY30F
98
10
RLY30G
98
10
RLY30H
98
10
RLY30F
45
3
RLY30G
45
3
RLY30H
45
3
+12V
R357
100
R356
1M
ACK3
ACK4
SD3
SD4
STD3
STD4
350Hz
620Hz
ACK1
ACK2
SD1
SD2
STD1
STD2
A3
RESET
D7
D3
A2
CS(EXTG/A)
D2
D0
A0
IOWR
D5
D4
A1
IORD
D6
D1
OGMSW2
OGMSW1
EXT4
EXT8
EXT2
BELL
EXT3
EXT6
EXT7
EXT5
EXT1
R32547K
R323
47K
+5V
+5V
R31947K
VAG
D392
+5V
CN3
4 PTX2
10 PRX2
12 PCLR
8 PA
6 PB
5 PC
13 EXP308CARD
14 DINTCARD
3 NC
7 NC
9 NC
11 NC
35 AG
36 AG
1 VAG
2 VAG
+5V
R391
10K
R399
5.6K
Q310
R317F
3.9
Q313F
R317G
3.9
Q313G
R317H
3.9
Q313H
Q314
R398
47K
VAG
VAG
VAG
D300F
D301F
D300G
D301G
D300H
D301H
C323F
NO MOUNT
C323G
NO MOUNT
C323H
NO MOUNT
C326
0.033
AG
D307F
D307G
D307H
C335
1
D393
D394
+12V
R394
27K
R395 27K
R312F
OPEN
R312G
OPEN
R312H
OPEN
PRX1
EXT2
EXT3
EXT4
EXT5
EXT6
ACK1
ACK2
SD1
SD2
ACK1,ACK2,SD1,SD2,STD1,STD2
ACK1
ACK2
SD1
SD2
STD1
STD2
EXT8
EXT7
EXT6
EXT8
EXT7
BELL
BELL
BELL
EXT1,EXT2,EXT3,EXT4,EXT5,EXT6,EXT7,EXT8,BELL1,BELL2,BELL3,BELL4,BELL5,BELL6,BELL7,BELL8,HOOK1,HOOK2,HOOK3,HOOK4,HOOK5,HOOK6,HOOK7,HOOK8,BELL
BELL1
BELL2
BELL3
BELL4
BELL5
BELL6
BELL7
BELL8
HOOK1
HOOK2
HOOK3
HOOK4
HOOK5
HOOK6
HOOK7
HOOK8
CRXD0
CRXD0
CRXD1
CRXD1
CRXD2
CRXD2
CRXD3
CRXD3
CREQ
CREQ
CTXD0
CTXD0
CTXD1
CTXD1
CTXD2
CTXD2
CTXD3
CTXD3
CINT
CINT
D7
D6
D4
D5
IOWR
IORD
D1
D0
CS(EXTG/A)
A2
A0
A3
A1
D2
D3
PDRLY
HOOK6
BELL6
BELL7
HOOK7
BELL8
HOOK8
CACK
CACK
BR1
PTX2
PB
PA
PC
EXP308CARD
DINTCARD
EXP08CARD
DISACARD
CE2
P/R2
RESET2
CE1
P/R1
RESET1
OGMSW2
OGMSW1
EOM2
VOX2
CNG2
EOM1
VOX1
CNG1
STD9
STD10
PTX1
STD4
STD3
SD4
SD3
STD2
STD1 ACK3
ACK4
620Hz
350Hz
PRX2
PCLR
RESET4BIT
TXPOWER
TXPOWER
TXPOWER
BELL
OL1
RESET
TXD6
TXD7
TXD8
TXD
RXD
RXD
RXD
RXD
EXT1
EXT7
EXT8
EXT6
EXP 308 CARD
CONNECTOR
EXP 308 CARD
DISA CARD
CONNECTOR
KX-TA308 MAIN BOARD NO.1 (2/2)
PROTECTOR
PULSE
TRANSFORMER
5V
0V
5V
0V
4ms
4MHz
12V
0V
1V 4ms
4ms
-1V
DC CUT
CAPACITOR
0.6V
2ms
4ms 4ms
4ms
8ms
OVER CURRENT
DETECT
BREAK CONTROL SW
12V
0V
16ms
12V
0V
5V 4 BIT CPU
0V 5V
0V
5V
NORMALY 0V
DTMF RECEIVE 5V
0V
NORMALY 0V
DTMF RECEIVE 5V
PITS DATA
FOR EXT
109~116
EXT G/A
DETECT
DATA
ADDRESS
5
0
0V AT
RESET
H=ON BELL
RELAY
CONTROL
L=OFF
H=ON HOOK HOOK
DETECT
OPTION CARD
DETECT
L=OFF HOOK
NORMALY 5V
DTMF RECEIVE 0V
5V
0V
5V
0V
5V
0V

(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)
(31)
(32)
(33)
(34)
(35)
(36)
(37)
(38)
(39)
(40)
(41)
(42)
R212C
1.2K
IC201C
10
11 12
R203C
2.7K
R224C
470
C209C
OPEN
R239C 0
R237C
0
+5V
R228C
100K
R226C
1.2K
C208C
OPEN
C215C
OPEN
J202C
NO MOUNT
D200C
IC200C
3
2
1
C200C
1µF
R231C
OPEN
C204C
0.068
R222C
1.2K
C220C
220P
PC200C
1 23
4
R242C
22K
R208C
39
C203C
2.2µFR238C
0
IC200C
5
67
R240C
NO MOUNT
R215C
1K
C205C
0.056
R207C
6.8K
R206C
8.2K
L200C
100µH
R217C
100K
R202C
100K
PC202C
1
23
4
R225C
0
CN10C
1T3 2R3
IC201C
89
6
T200C
1
34
6
C211C
0.056
SG
Q200C
R223C
1.2K
C217C OPEN
R210C
100
IC201C
4
35
C216C
OPEN
R216C
100K
PC204C
1
23
4
L202C
100µH
ZNR21C
NO MOUNT
R213C
1.2K
C206C
0.056
C221C
0.001
PC201C
1 23
4
R227C
100K
R200C
22K
R241C
680
R201C 1.2K
R205C
22
R221C
1.2K
R236C
0
C241C
1µ
C218C
OPEN
IC201C
2
113
C210C
0.056
ZNR20C
R214C
390
Q208C
R243C
22K
C242C
1µ
+5V
R211C
3.9K
D201C D202C
D203A NO MOUNT
R242A
22K
R243A
22K
L202A
100 µH
R225A
0
IC200A
3
2
1
+5V
IC201A
21 13
R239A
0
IC201A
4
35
R227A
100K
R204A
NO MOUNT
C206A
0.056
R207A
6.8K
R226A
1.2K
PC203A
NO MOUNT
1
23
4
R208A
39
C209A
OPEN
C220A
220P
C210A
0.056
C223A
100p
R228A
100K
C205A
0.056
R263A
0
C202A
10µF
R215A
1K
C241A
1µ
R222A
1.2K
R211A
3.9K
T200A
1
34
6
R261A
0
C217A
OPEN
R214A
390
R210A
100
R240A
NO MOUNT
C204A
0.068
C207A
100p
R217A
100K
C211A
0.056 IC201A
8
9
6
R229A
330K
C224A
100p
C203A
2.2µF
R213A
1.2K
C242A
1µ
R202A
100K
R209A
NO MOUNT
R236A
0
+5V
C216A
OPEN
R231A
OPEN
R238A
0
R212A
1.2K
C212A
100p
ZNR20A
D200A
PC202A
1
23
4
R206A
8.2K
Q208A
R221A
1.2K
R223A
1.2K
CN10A
1T1 2R1
C218A
OPEN
C221A
0.001
R203A
2.7K
Q200A
IC201A
10
11 12
PC204A
1
23
4
R241A
680
IC200A
5
67
C215A
OPEN
L200A
100µH
R232A
OPEN
R224A
470
C208A
OPEN
R216A
100K
R237A
0
R218A
330K
R242B
22K
R243B
22K
L202B
100µH
R225B
0
IC200B
3
2
1
+5V
IC201B
2
113
R239B
0
IC201B
4
35
R227B
100K
C206B
0.056
R207B
6.8K
R226B
1.2K
R208B
39
C209B
OPEN
C220B
220P
C210B
0.056
R228B
100K
C205B
0.056
C202B
10µF
R215B
1K
C241B
1µ
R222B
1.2K
R211B
3.9K
T200B
1
34
6
C217B OPEN
R214B
390
R210B
100
C204B
0.068
R217B
100K
C211B
0.056 IC201B
8
9
6
C203B
2.2µF
R213B
1.2K
C242B
1µ
R202B
100K
R236B
0
+5V
C216B
OPEN
R231B
OPEN
R238B
0
R212B
1.2K
ZNR20B
D200B
PC202B
1
23
4
R206B
8.2K
Q208B
R221B
1.2K
R223B
1.2K
CN10B
1T2 2R2
C218B OPEN
C221B
0.001
R203B
2.7K
Q200B
IC201B
10
11 12
SG
PC204B
1
23
4
R241B
680
IC200B
5
67
C215B
OPEN
L200B
100µH
R224B
470
C208B
OPEN
R216B
100K
R237B
0
L203A
100µH
L203B
100µH
L203C
100µH
SG
ZNR2
L201A
100µH
L201B
100µH
J201B
0
L201C
100µH
J201C
0
J200C
0
J200B
0
R201B 1.2K
D201B
R240B
NO MOUNT
R200B
22K
J202B
NO MOUNT
PC200B
1 23
4
ZNR21B
NO MOUNT
R205B
22
D202B
PC201B
1 23
4
C200B
1µF
R201A 1.2K
D201A
R200A
22K
J202A
0
PC200A
1 23
4
ZNR21A
NO MOUNT
R205A
22
D202A
PC201A
1 23
4
C200A
1µF
J200A
0
CN5
3
T1 2T1 1R1
CN5
8
T2 6T2 4R2
CN5
5
T3 7
T3 9
R3
SG
SA2A
NO MOUNT
SA2B
NO MOUNT
SA2C
NO MOUNT
R262A
0
R260A
0
R220A
330K
R219A
330K
IC202A NO MOUNT
1
2
13
R234A
OPEN
IC202A
NO MOUNT
3
4
5
R233A
OPEN
R229B
330K
R260B
0
C212B
100p
IC202B NO MOUNT
12 13
R234B
OPEN
R229C
330K
R260C
0
C212C
100p
IC202C NO MOUNT
1
213
R234C
OPEN
C223B
100p
R233B
OPEN
IC202B
NO MOUNT
3
45
R261B
0
R220B
330K
R263B
0
R219B
330K
C224B
100p
R232B
OPEN
C207B
100p
R262B 0
R218B
330K
C223C
100p
R233C
OPEN
IC202C
NO MOUNT
3
45
R261C
0
R220C
330K
C207C
100p R262C
0
R218C
330K
R263C
0
R219C
330K
C224C
100p
R232C
OPEN
IC202A
NO MOUNT
89
6
IC202A
NO MOUNT
1110 12
IC202B
NO MOUNT
8
9
6
IC202B
NO MOUNT
10 11
12
IC202C
NO MOUNT
8
96
IC202C
NO MOUNT
10 11
12
RLY22A
NO MOUNT
1
24
6
RLY22B
NO MOUNT
1
24
6
RLY22C
NO MOUNT
1
24
6
R209B
NO MOUNT
D203B NO MOUNT
PC203B
NO MOUNT
1
23
4
R204B
NO MOUNT
R209C
NO MOUNT
D203C NO MOUNT
PC203C
NO MOUNT
1
23
4
R204C
NO MOUNT
SA3
NO MOUNT
R1
T1
VAG
VAG
VAG
VAG
VAG
VAG
SA1A
SA1B
SA1C
C202C
10µF
J201A
0
R1
T1
CO3
CO1
CO2
CALLER ID/PAY TONE
CARD CONNECTOR
CALLER ID/PAY TONE
CARD
CONNECTOR
CALLER ID/PAY TONE
CARD
CONNECTOR
KX-TA308 MAIN BOARD NO.2 (1/2)
L204A 820uH
L205A 820uH
J124 NC
L204B 820uH
L205B 820uH
J127 NC
L204C 820uH
L205C 820uH
J130 NC
NOISE FILTER
CPC BELL DETECTION CIRCUIT
PULSE DIALING
CIRCUIT
DIAL SHUNT
CIRCUIT
2W/4W
CONVERT CIRCUIT
SEND AMPLIFIER
MUTE SW
CONFERENCE SW
AMPLIFIER
RECEIVE
B/N
RECEIVE MUTE SW
CURRENT
DETECT CIRCUIT
SURGE PROTECTOR

(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)
(31)
(32)
(33)
(34)
(35)
(36)
(37)
(38)
(39)
(40)
(41)
(42)
Q206C
+12V
R252C
47K
R253C
47K
Q205C
R256C
47K
Q203C
R254C
47K
R255C
47K
Q204C Q207C
C281
0.022
+5V
R920
12K
C280
0.022
+5V
IC113
3
2
1
C908
0.0015
R921
39K
R919
0
C909
0.0082
+12V
R254A
47K
R253A
47K
Q203A
R256A
47K
Q206A
Q204A
R255A
47K
R235A
680K
R252A
47K
Q207A
Q205A
+12V
R254B
47K
R253B
47K
Q203B
R256B
47K
Q206B
Q204B
R255B
47K
R252B
47K
Q207B
Q205B
IC200A
8
4
+12V
C290A
0.022
+12V
IC200B
8
4
C290B
0.022
+12V
IC200C
8
4
C290C
0.022
+12V
C292A
0.022
C292B
0.022
+12V
C292C
0.022
+12V
+12V
IC201B
14
7
IC201C
14
7
C291B
0.022
+12V
C291C
0.022
IC201A
14
7
C291A
0.022
+12V
C294
0.022
+12V
IC204
12
13
IC204
98
6
IC204
10
11
12
R264 47K R265 47K
IC130
VDD 1
VSS 7
NC 18
COL1
4
COL2 5
COL3 6
ROW1
17
ROW2 16
ROW3 15
ROW4 14
COL4
11
OSCO
10
TONE
20
CD
19
XMIT
2
MUTE
12
OSCI
9
NC
13
NC
8
NC
3
R250A
OPEN
Q202A
NO MOUNT
Q202B
NO MOUNT
R250B
OPEN
R250C
OPEN
Q202C
NO MOUNT
IC202A
14
7
IC202B
14
7
IC202C
14
7
R266 47K R267 47K R268 47K R269 47K R270 47K R271 47K
+5V
R273C 47K
R273B 47K
R273A 47K
+5V
IC204
14
7
C910
0.1
R280 330
R281 330
R282 330
R283 330
R284 330
R285 330
R286 330
R287 330
CN5
14 PAY1
15 PAY2
16 PAY3
17 DIAL1
18 DIAL2
19 DIAL3
20 CALLIDCARD
21 PAYTONECARD
IC205
P10
13 P11
14 P12
15 P13
16 P14
17 P15
18 P16
19 P17
20
P20
21 P21
24 P22
25 P23
26 P24
27 P25
28 P26
29 P27
30
P30
36 P31
37 P32
38 P33
39 P34
40 P35
41 P36
44 P37
45
P40
46 P41
47 P42
48 P43
49 P44
50 P45
51 P46
53 P47
54
P50 55
P51 56
P52 57
P53 58
P54 59
P55 60
P56 61
P57 64
VSS 2
VSS 12
VSS 23
VSS 63
D0 68
D1 69
D2 70
D3 71
D4 72
D5 74
D6 75
D7 76
VDD 33
VDD 73
NC 3
NC 22
NC 62
NC 43
P00
4P01
5P02
6P03
7P04
8P05
9P06
10 P07
11
A0 77
A1 78
A2 79
A3 80
RD 66
WR 65
CS 67
RST 1
P60 31
P61 32
P62 34
P63 35
VSS 52
VSS 42
R276
330
+5V
R274 47K
CN6
24
DOORCARD
R922
4.7K
CN5
33 CO1
34 CO2
41 CO3
DTMFG
3.58MHz
A3
A1
D4
D2
D5
IORD
CS(COG/A)
D6
D0
A2
D7
RESET
D3
A0
IOWR
D1
VMDTMF1
VMDTMF2
CO2
CO1
BGM
CO3
VAG
Q210A
VAG
D210A
VAG
Q210B
R235B
680K
D210B
VAG
Q210C
R235C
680K
D210C
R923
OPEN
+5V
C282
0.033
CONF1,CONF2,CONF3 MUTE1,MUTE2,MUTE3 DL1,DL2,DL3 DS1,DS2,DS3 SHUNT1,SHUNT2,SHUNT3 HD1,HD2,HD3 BELLA1,BELLA2,BELLA3 BELLB1,BELLB2,BELLB3
CONF1
CONF2
CONF3
MUTE1
MUTE2
MUTE3
DL1
DL2
DL3
DS1
DS2
DS3
SHUNT1
SHUNT2
SHUNT3
HD1
HD2
HD3
BELLA1
BELLA2
BELLA3
BELLB1
BELLB2
BELLB3
DTMF3
DL3
DTMF3
SHUNT3
MUTE3
HD3
CONF3
DTMF1
DL1
DTMF2
HD2
CONF2
MUTE2
SHUNT2
DL2
BELLB3
D5
D4
D6
D7
A1
A3
A0
A2
CS(COG/A)
RESET
D0
DTMF1,DTMF2,DTMF3
DTMF2
DTMF1
IORD
IOWR
BELLA3
BELLA2
BELLB2
BELLA1
BELLB1
CO1,CO2,CO3
SHUNT1
MUTE1
CONF1
HD1
3.58MHz
PAD1,PAD2,PAD3
CDT1,CDT2,CDT3
PAD1
PAD2
PAD3
PAD1
PAD2
PAD3
CDT1
D3
DS1
DS2
DS3
CDT2
CDT3
VMDTMF2
VMDTMF1
D1
D2
CDT3
CDT3
CDT2
CDT2
CDT1
CDT1
CO3
CO2
CO1
BGM
CO1
CO2
CO3
DTMFG
TO CALL ID
CARD/PAY TONE
CARD
KX-TA308 MAIN BOARD NO.2 (2/2)
MUSIC ON
HOLD SW
SHUNT
SW MUTE
SW CONF SW HD SW DTMF SW
DTMF SW
DTMF AMPLIFIER CO 1
CONTROL
CO 2
CONTROL CO 3
CONTROL
DTMF
GENERATOR
DTMF GENERATOR
CONTROL
NORMAL
0V
CO G/A
NORMAL 5V
NORMAL 5V
NORMAL 5V
5V
DATA
0V
5V
ADDRESS
VOICE MAIL
INTEGRATION CONTROL
0V

(a)
(b)
(c)
(d)
(e)
(f)
(g)
(1) (2)(3)(4)(5) (6) (8) (9)(7)
(10)(11)(12)(13)(14)(15)(16) (17) (18)(19) (20)
1/4
KX-TA308 MAIN BOARD NO.3 (1/4)
(21)(22)
(23) (24) (25)
(26)
(27)
(28)
R904
120K
C902
0.0068
C901
0.1 R950 39K C900
0.068
R528
0
R527
0
R526
0
R521
6.8K
R525
0
C521
0.022
Q500
Q501
R530
47K
R531
47K
+12V
+12V
R912 100K R913 100K R914 100K
+5V
R536
1K
R535
22K
IC113
5
6
7
R537 33K
C113
0.001
R501 330
R511 1.2K
+12V
C501
0.022
C500
0.022
+12V
IC500
(8*16)CROSSPOINT
44VDD
40CS
18VSS
22VEE
3RST
6
NC 15
NC
NC 16
28
NC 29
NC
38
NC
13
X10
12
X9
11
X8
10
X7
9
X6
32
X5
33
X4
34
X3
35
X2
36
X1
37
X0
20
STR
26
AY0
27
AY1
2
AY2
5
AX0
24
AX1
25
AX2
4
AX3
42
DATA
8
X15
7
X14
30
X13
31
X12
14
X11
17
Y7
19
Y6
21
Y5 Y4
231
Y3
43
Y2
41
Y1
39
Y0
R502 330
R503 330
R504 330
R505 330
R506 330
R507 1K
R508 1K
R522
6.8K
R523
6.8K
R524
6.8K
R512 1.2K R513 1.2K R514 1.2K R515 1.2K R516 1.2K R517 1.2K R518 1.2K
C522
0.022
C523
0.022
C524
0.022
IC501
(4*8)CROSSPOINT
28 VDD
12 CS
14 VSS
15 VEE
22 RST
NC 19
18
NC 5
NC 4
NC
7X0 9X1
11 X2 13 X3 21
STR
16
AY0
17
AY1
20
AY2
8
AX0
10
AX1
23
Y7
24
Y6
25
Y5
Y4
26 27
Y3
1
Y2
2
Y1
3
Y0
DATA 6
+24V
VAG
+24V
+5V
IC114
12
13
IC114
10 11
12
IC900
TONEAMP
3
2
1
R59 39
VAG
R7039
R7139
R7239
R7339
R7439
R7539
R7639
R7739
CN4
22D0
21D1
20D2
19D3
18D4
17D5
16D6
15D7
31OGM1
32OGM2
23CS(DISADTMF)
29+24V
IORD 30
27+5V
28+5V
33VAG
34VAG
25AG
26AG
CN6
23DHK1
22DHK2
21DHK3
20DHK4
19DCN1
18DCN2
17DCN3
16DCN4
15DOPN1
14DOPN2
13DOPN3
12DOPN4
11BUSY1
10BUSY2
9DRLY1
8DRLY2
26DOOR1
25DOOR2
6+24V
7+24V
4VAG
5VAG
3AG
2AG
1NC
R31
330
R30
330
R33
330
R32
330
R35
330
R34
330
R37
330
R36
330
R39
330
R38
330
R41
330
R40
330
R43
330
R42
330
R45
330
R44
330
R25 47K R26 47K R27 47K R28 47K R29 47K R46 47K R47 47K R48 47K
+5VS
J116
0
J117
OPEN
OGMSW2
OGMSW1
CO3
EXT2
EXT5
EXT1
EXT3
EXT4
EXT8
EXT6
CO1
CO2
EXT7
CN3
30CO1
29CO2
32CO3
31CO4
34CO5
33CO6
27DOOR1
28DOOR2
25DTMF1
26DTMF2
20PAGOUT
24INT1
21INT2
22INT3
VAG VAG
VAG
VAG
VAG
VAG
VAG
VAG
VAG
A1 A0 A6 A5 A4
CS(8*16)1
A4 A5 A6 A0 A1 A2 A3
DTMFR2
PAGOUT
INT1
INT2
INT3
CO6
CO5
CO4
CO2
CO2
CO3
CO3
CO4
CO4
CO5
CO5
CO6
CO6
DTMFR1
DTMFR1 DTMFR2
DTMFR2
PAGIN
PAGIN
INT1
INT1
INT2
INT2
INT3
INT3
INT4
INT4 CO1
CO1
DOOR1
DOOR1
DOOR2
DOOR2
CO1
CO1
CO2
CO2
CO3
CO3
IOWR
IOWR
IOWR
CS(4*8)1
PAGOUT
PAGOUT
OGM1
OGM1
OGM1
OGM2
OGM2
OGM2
D2
D0
D0
CS(DISADTMF)
CS(4*8)2
DTMFR1
D0
D1
D3
D4
D5
D6
D7
RESET
RESET
RESET
DOOR2
DOOR1
EXT8
EXT8
EXT5
EXT5
EXT2
EXT2
EXT4
EXT4
EXT7
EXT7
EXT1
EXT1
EXT3
EXT3
EXT6
EXT6
DRLY2
DRLY1
BUSY2
BUSY1
DOPN4
DOPN3
DOPN2
DOPN1
DOOR1
DOOR2
DHK1
DHK2
DHK3
DHK4
DCN1
DCN2
DCN3
DCN4
OGMSW1
OGMSW2
TONE1 TONE2
IORD
BGM
DISA CARD
CONNECTOR
DOORPHONE CARD
CONNECTOR
CROSS POINT
INT PAGING
AMPLIFIER
INT
B/N
TONE
LOW PASS
FILTER
8 x 16 CROSS POINT
4 x 8

(h)
(i)
(j)
(1) (2)(3)(4)(5) (6) (8) (9)(7)
(10)(11)(12)(13)(14)(15)(16) (17) (18)(19) (20)
2/4
KX-TA308 MAIN BOARD NO.3 (2/4)
(21)(22) (23) (24) (25) (26)
(27)
(28)
R905
220K
C905
0.0033
C904
0.1
R951
27K
C903
0.047
R901
100K
R902
100K
R903
100K
IC900
TONEAMP
5
6
7
R159
100K
C130
0.1
X101
3.58M
Q502
+12V
Q503
+12V
Q504
+12V
+12V
C502
0.022
C122
0.1
R160
100K
D401
IC400
BGMAMP
5
67
D400
R402
6.8K
C404 OPEN
R404 33K
Q400
+12V
R408
47K
+5V
R409
470
R410
470
IC502
(4*8)CROSSPOINT
28 VDD
12 CS
14 VSS
15 VEE
22 RST
4NC 5NC
NC
18 19 NC
7
X0
9
X1
11
X2
13
X3
21 STR
16 AY0
17 AY1
20 AY2
8AX0
10 AX1
6
DATA
3
Y0
2
Y1
1
Y2 Y3
27 26
Y4
25
Y5
24
Y6
23
Y7
R532
47K
R533
47K
R534
47K
C114
0.1
C131
0.1
C132
0.022
R193
100K
C133
0.1
C135
0.1
R192
100K
C116
0.1
C400
1
C401
1
IC204
43
5
IC114
34
5
IC114
89
6
IC401
BGMIC
21
3
CN11
EXTJACK
CN9
PAGJACK
IC402
12
13
IC402
43
5
IC402
98
6
IC402
11 10
12
R952
47K
+12V
C405
0.1
J114
0
J115
OPEN
J118OPEN
R157
0
STD3
3.58MHz
SD3
ACK3
SD4
ACK4
STD4
BGM
VMDTMF2
VMDTMF1
620Hz
350Hz
DTMFG
SD1
STD1
ACK1
STD2
SD2
ACK2
19INT4
23PAGIN
18BGM
17TONE2
16TONE1
15DTMFG
VAG
VAG VAG
VAG
R403
150K
J119
R401
6.8K
VAG
VAG
R405
2.2K
+5V
C134
0.022
C146
0.022
IC121
DTMFR4(DISA)
INPUT 1
NC 2
PD 3
OSCO 4
OSCI 5
6
NC 7
Vss
SD
9ACK
10 STD
11 EST
12 NC
13 Vdd
14
LOAD
8
IC120
DTMFR3R(DISA)
INPUT 1
NC 2
PD 3
OSCO 4
OSCI 5
6
NC 7
Vss
SD
9ACK
10 STD
11 EST
12 NC
13 Vdd
14
LOAD
8
+5V
+5V
IC104
DTMFR2
INPUT 1
NC 2
PD 3
OSCO 4
OSCI 5
6
NC 7
Vss
SD
9ACK
10 STD
11 EST
12 NC
13 Vdd
14
LOAD
8
C402
1
VAG
+5V
IC105
DTMFR1
INPUT 1
NC 2
PD 3
OSCO 4
OSCI 5
6
NC 7
Vss
SD
9ACK
10 STD
11 EST
12 NC
13 Vdd
14
LOAD
8
C403
1
C145
0.022
C406
0.1
C407
0.01
D405
D406
L402
L401
J402
J401
C408
0.22
R412
1K
R954
OPEN
R955
OPEN
A1
A0
A6
A5
A4
INT4
VMDTMF2
VMDTMF2
620Hz
350Hz
VMDTMF1
VMDTMF1
EXTPAGINGSW
STD1
ACK1
SD1
STD2
ACK2
SD2
ACK3
STD3
ACK4
STD4
SD3
SD4
DTMFR1
IOWR
PAGIN
BGM
TONE2
TONE1
BGMSW
D0
CS(4*8)2
RESET
TONE1
TONE2
DTMFG
3.58MHz
BGM
BGM
L:INTBGM
H:EXTBGM
DTMF RECEIVE
DISA1
DISA2
CROSS POINT
VOICE MAIL
INTEGRATION LOW PASS FILTER
4+8
NORMALY
DTMF RECEIVER 2
DTMF RECEIVER 1
EXT MUSIC
JACK
EXT PAGING
JACK
0V
0V
5V
3.58MHz

(a)
(b)
(c)
(d)
(e)
(f)
(g)
(29)
(30) (32)
(33) (34)(35) (37)(38)
(39)
(40) (44) (45) (42)(41) (46)(47)(48)(49)(50) (52) (54)(51) (53) (55) (56)(57)(58)(59)(60)(61)(62)
(43)
(31)
KX-TA308 MAIN BOARD NO.3 (3/4)
(36)
3/4
IC106
DECORDER
A
1
B
2
C
3
G1
6
VDD 16
G8
G2A
4
G2B
5
Y0 15
Y1 14
Y2 13
Y3 12
Y4 11
Y5 10
Y6 9
Y7 7
C104
0.022
+5V
C148
0.022
+5VS
R112
1M
R115
150
X100
24MHz
C112
15P
C101
15P
R161
47K
R162
47K
+5VS
+5VS
R151
470 D104
+5V
R149
180K
R148
20K
C121
0.082
C120
0.082
R147 390K
IC112
5
67
R146
33K
R145
47K C107
50V3.3 IC101
ROM(2M)
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
OE24
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
CE
22
VCC
32
GND
16
A8 27
A9 26
A10 23
A11 25
A12 4
A13 28
A14 29
A15 3
A16 2
PRG
31
A17
30 VPP
1
Q105
R141
4.7K
R143
68K
R142 22K
R140
1K
IC115
56
D100
20V
+24V
+5V
+5VS
R139
18K
+5VS
SW1
IC115
98
IC115
11 10
IC115
13 12
IC115
12
IC115
34
C109
2.2
R144
27K
C108
0.1
+5V
TP60
(TESTPOINT)
IC110
CLOCKIC
1CE
2
SCLK
3
SIO
4VSS 5
INTR
6
OCSOUT
7
OSCIN
8
VDD
X103 32.789MHz
C12820P
D101
D404
R411
680
+5V
D102
J104
OPEN
C137
0.022
IC123
+5B
1
24
C15033
R181 39
R182 39
R183 39
R184 39
R185 39
R186 39
R187 39
R188 39
R189 39
R190 39
R191 39
R180 39
IC111
RESETIC
3
1
2
R199 39
R198 39
R197 39
BATT
C15133
IC112
3
21
Q133
IC102
RAM(1M)
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
OE
24
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 12
VCC
32
GND
16
A8 27
A9 26
A10 23
A11 25
A12 4
A13 28
A14 3
A15 31
A16 2
S2
30
NC
1
WE
29 S1 22
IC124
24
R953
10K
CN1
4 +6V
7 BELL
1 ACDOWN
6 FRQ
2 +24V
3AG
5AG
+5V
+24V
R51 39
R52 39
R53 39
R54 39
R55 39
R56 39
R57 39
R58 39
+5VS
D103
C100
0.047F
J103
OPEN
+24V
IC103
1
VCC
2
GND
3
OUT
+12V
C157
33
C158
0.1
R80 39
R81 39
R82 39
C129
0.022
BELL
CS(COG/A)
J113
CN2
1AG
2AG
9 BELL
20 A0
19 A1
22 A2
21 A3
24 A4
23 A5
26 A6
28 IORD
25 IOWR
27 RESET
17 D0
18 D1
15 D2
16 D3
13 D4
14 D5
11 D6
12 D7
30 CS(CALL2)
35 CS(EXP308G/A)
36 CS(8*16)2
33 CS(4*8)3
34 CS(EXP08G/A)
31 CS(8*16)3
32 CS(4*8)4
29 CS(DINT)
6 +5V
7 +5V
8 +5V
3 +24V
4 +24V
5 +24V
+12V +12V
+12V
CN12
1 4M
2 N
3
2M
R152
100/1W
J300
A10
A12
A13
A15
A14
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A11
RTCCS
RTCCLK
RTCDATA
DHK1,DHK2,DHK3,DHK4,DCN1,DCN2,DCN3,DCN4,DOPN1,DOPN2,DOPN3,DOPN4,BUSY1,BUSY2,DRLY1,DRLY2
CS(EXTG/A)
LEDSW
A17
A19
A0 A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
D7
D6
D5
D4
D3
D0
D1
D2
D0,D1,D2,D3,D4,D5,D6,D7
A0
A1
A2
A3
A6
A5
A4
A15
D0
CS(8*16)1
CS(4*8)1
CS(CALL1)
CS(COG/A)
RESET
CS(MODEM)
CS(4*8)2
CS(8*16)1,CS(4*8)1,CS(4*8)2,CS(DISADTMF)
RTCCS,RTCCLK,RTCDATA
ACDOWN
IOWR
RESET
+5VB
BELL
CS(CALL2)
A16
IORD
A18
MAIN-POWER
CONNECTOR
H:LED ON
L:LED OFF
512K:OPEN
1M :0
CLOCK
LOW PASS FILTER
BELL SIGNAL PULSE
DC POWER DOWN DETECT
CIRCUIT
CPU CLOCK
RESET
CIRCUIT
I/O CS DECORDER
24MHz
LED
CONTROL
WAVE
ROM
5V
0V 5V
0V
5V
0V
5V
0V
5V
0V
5V
RAM
0V
+12VREGULATOR LITHIUM
BATTERY 3V
4M/2M
CONTROL SW
32MHz
5V
0V
0V AT RESET
NOMALY 5V

(h)
(i)
(j)
(29)
(30) (37)(38) (39) (45) (54)(55) (56)(57)(58)(59)(60)(61)(62)(32)(33) (34)(35)(31) (36)
4/4
KX-TA308 MAIN BOARD NO.3 (4/4)
(40) (44) (42)(41) (46)(47)(48)(49)(50) (52)(51) (53)
(43)
IC108
1D
3
2D
4
3D
7
4D
8
5D
13
6D
14
7D
17
8D
18
OE
1
8Q 19
7Q 16
6Q 15
5Q 12
4Q 9
3Q 6
2Q 5
1Q
2
E
11
VCC
20
GND
10
IC100
CPU(V55)
120
OPEN
119
DEX
118
RAS
117
IORD
116
IOWR
115
RD
114
WRL
113
WRH
112
ASTB
111
IC(L)
110
D8/D16
109
GND
108
VDD
107
A23
106
A22
105
A21
104
A20
103
A19
102
A18
101
A17
100
A16
99 A15
98 A14
97 A13
96 A12
85
AD1
84
AD0
83
IC(H)
82
GND
81
VDD
80
TCE1
79
TCE0
78
DMAAK1
77
DMAAK0
76
RS232CDSR
75
RS232CDTR
74
VDD
73
P77
72
P76
71
P75
70
P74
69
P73
68
P72
67
P71
66
P70
65
GND
64
AVDD
63
AVREF
62
CODE3
61
CODE2
55 RTCCLK
54 RTCCS
53 GND
52 DRLY2
51 DRLY1
50 BUSY2
49 BUSY1
48 DOPN4
47 DOPN3
46 DOPN2
45 DOPN1
44 VDD
43 P36
42 MODEMRXD
41 MODEMTXD
40 P33
39 P32
38 RS232CRXD
37 RS232CTXD
36 25Hz
35 440Hz
34 TEST
33 LEDSW
32 BGMSW
31 EXTPAG
30
INTP5
29
INTP4
28
ACDOWN
27
RTC
26
INTP1
25
DCPDWN
24
P10
23
GND
22
DCN4
21
DCN3
20
DCN2
19
DCN1
18
DHK4
17
DHK3
16
DHK2
15
DHK1
14
REFRQ
13
GND
12
X2
11
X1
10
VDD
9
WDTOUT
8
RESET
7
CLKOUT
6
POLL
95 A11
94 A10
93 A9
92 A8
91 AD7 60 CODE1
59 DEFAULT
58 AVSS
57 VDD
56 RTCDATA
90
AD6
89
AD5
88
AD4
87
AD3
86
AD2
5
READY
4
HLDRQ
3
HLDAK
2
BUSLOCK
1
VDD
R107 39
R122 39
C106
0.022
+5V
R13010K
R131 10K R132 10K
+5VS
+5VS
R104
10K
R10610K
R10510K
+5VS
+5V
C105
0.022
IC107
DECORDER
A
1
B
2
C
3
G1
6
VDD 16
G8
G2A
4
G2B
5
Y0 15
Y1 14
Y2 13
Y3 12
Y4 11
Y5 10
Y6 9
Y7 7
+5VS
+5VS
+5VS
+5VS
L103
L101
L104
L102
4.7
C127
4.7
C126
4.7µF
C124
4.7µF
C123
+5V
R153
39
R154
39
R155
39
R156
39
R109 39
R111 39
R113 39
R114 39
R116 39
R117 39
R118 39
R119 39
R120 39
R121 39
R123 39
R124 39
R125 39
R126 39
R127 39
R128 39
R129 39
R136 10K
R13739
R138 10K
R163
47K
R164
10K
CN7
7 RST
6 DSR
4 DTR
2 RS232CRXD
3 RS232CTXD
5AG
8NC
1NC
9NC
IC123
5
3
+5VB
C117
0.022
IC112
8
4
C119
0.022
+24V
IC115
14
7
C140
0.022
+5V
IC114
14
7
C141
0.022
+12V
IC113
8
4
+12V
C143
0.022
+12V
IC900
8
4
C142
0.022
R170 39
R171 39
R172 39
R173 39
R175 39
R174 39
R176 39
R177 39
R178 39
R179 39
+12V
IC400
8
4
C144
0.022
IC117 RS232C
4C2+
5C2- 6
V-
2
V+
16
VDD
15 GND
3C1-
1C1+
89
11 14
1312
10 7
J110 J111 J112
R194 47K
R195 47K
R196 47K
+5VS
SW2
21
3
IC400
VAG
3
2
1
+12V
R150
2.7K
D105 6.2L
VAG
C155 100
R14 10K
R15 10K
R16 10K
IC122
2 1
4
R134 39
R133 39
+5V
+24V
R60 39
R61 39
R83 39
R84 39
R85 39
R86 39
R87 39
R88 39
IC402
14
7
+12V
C149
0.022
+5VS
C118
0.022
IC122
5
3
C115
0.022
+5V
IC124
5
3
D3
D2
D6
D0
D5
D7
D1
D4
IORD
IOWR
A0
CS(EXTG/A)
A3
RESET
A1
A2
CN5
10 NC
11 NC
12 NC
13 NC
43 A4
48 A5
44 CS(MODEM)
46 CS(CALL1)
39 A0
42 A1
24 A2
45 A3
25 D0
26 D1
27 D2
28 D3
29 D4
30 D5
31 D6
32 D7
37 IORD
38 IOWR
40 RESET
47 MODEMRXD
49 MODEMTXD
50 MODEMINT
22 +5V
23 +24V
35 AG
36 AG
R66 47K
R64 47K
R62 47K
R67 47K
R65 47K
R69 47K
R63 47K
R68 47K
+5VS
R108 39
L110
L111
L112
L114
L113
L115
L116
L117
L118
L119
L120
L121
L122
R420
39
R421
39
R422
39
R423
39
J120 J121
A10
A11
A12
A13
A14
A15
A17
A19
A11
A10
A13
A15
A14
A12
A16
A9
A8
A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15,A16,A17,A18,A19
CS(EXTG/A)
D0
D1
D2
D3
D5
D4
D6
DSR
RS232CRXD
RS232CTXD
A2
A3
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
D0
D0,D1,D2,D3,D4,D5,D6,D7
A1
A0
D0,D1,D2,D3,D4,D5,D6,D7
DTR
D7
IOWR
IOWR
RESET
RESET
MODEMTXD
DCN4 DCN3 DCN2 DCN1
DHK4 DHK3 DHK2 DHK1
RTCCS
RTCCLK
RTCDATA
DOPN1
DOPN2
DOPN3
DOPN4
BUSY1
BUSY2
DRLY1
DRLY2
CS(DISADTMF)
A5
A4
CS(EXP308G/A)
CS(8*16)2
CS(4*8)3
CS(EXP08G/A)
CS(8*16)3
CS(4*8)4
CS(DINT)
D7 D6 D5 D4 D3 D2 D1 D0
A18
IORD
IORD
A7
A6
A5
A4
A3
A2
A1
A0
MODEMINT
MODEMRXD
ADDRESS
LATCH CALLER ID CARD
CONNECTOR
I/O CS DECORDER
DOOR PHONE
CONTROL PORT
CPU
5V
0V 5V
0V
RS232C
DRIVER/
RECEIVER IC
FILTER
VAG
6V
5V
0V
5V
0V
5V
0V
ADDRESS LATCH
SYSTEM
CLEAR SW
DOOR PHONE
DOOR OPENER
CONTROL PORT

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
KX-TA308 DOORPHONE/DOOR-OPENER CARD (1/2)
R9A
10K
R1A
10K
C4A
0.033
D3A
R11A
47K
C9A
10µ
IC2A
1
2
34
8
Q5A
Q4A
CN3
2T
3R
R5A
10K
R6A
1.8K
IC1A
5
6
7
C6A
0.1
+24V
C10A 0.0015
R10A 330K
R2A
2.2K
R20A
0
Q2A
C11A
0.022
Q3A
C7A 330P
+24V
L1A
0
R3A
2.2K
R13A
1K
C8A
1µ
+24V
Q1A
R12A
56K
C12A
0.022
D2A
+24V
IC1A
12
3
4
8
R16A
100
L2A
0
R19A
10K
R7A
100
Q7A
ZNR1A
R4A 220K
T1A
4
6
3
2
1
D4A
R8A
1150
Q4C
L2C
0IC1C
12
3
4
8
R10C 330K
R11C
47K
R9C
10K
CN4
2
T
3
R
R1C
10K
Q2C
Q7C
C11C
0.022
R19C 10K
IC2C
1
2
34
8
R6C
1.8K
T1C
4
6
3
2
1
R4C 220K
R13C
1K
D3C
R2C
2.2K
R8C
1150
L1C
0
+24V
C9C
10µ
Q5C
Q1C
R12C
56K
R5C 10K
R20C
0
C6C
0.1 IC1C
5
6
7
D2C
+24V
R3C
2.2K
C4C 0.033
D4C
C7C 330P
R16C
100
R7C
100
+24V
C12C
0.022
C8C
1µ
+24V
C10C 0.0015
ZNR1C
Q3C
VAGVAG
VAG
VAG
VAGVAG
VAG
VAG
C5A
47
C5C
47
R14A
10K
R14C
10K
DOOR 1 DOOR
DOOR HOOK DETECT
ON HOOK=0V
OFF HOOK=5V
DOOR CONNECT DETECT NOT CONNECT=0V
RECEIVE
AMPLIFIER
CONVERT SW
DOOR 2
0
5
POWER SW
COMMUNICATE=5V
CONNECT=5V
COMMUNICATE
SEND AMPLIFIER
NOT COMMUNICATE=0V

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
KX-TA308 DOORPHONE/DOOR-OPENER CARD (2/2)
R15A
3.9K
C14A
1µ
+24V
C133
VAG
R15C
3.9K
VAG
C14C
1µ
Q8A
CN2
4
3
C13B
100V 0.1
Q8B
R17A
1/4W 150
R17B
1/4W 150
D5B
CN2
2
1
D5A
C13A
100V 0.1
CN1
11 BUSY1
26 DOOR1
19 DCN1
23 DHK1
22 DHK2
18 DCN2
9 DRLY1
10 BUSY2
25 DOOR2
17 DCN3
21 DHK3
20 DHK4
16 DCN4
8 DRLY2
15 DOPN1
14 DOPN2
13 DOPN3
12 DOPN4
6 +24V
7 +24V
4VAG
5VAG
24 DOORCARD
2AG
3AG
1NC
R22B
1/4W 470
+24V
R22A
1/4W 470
+24V
VAG
C333
IC2A
5
67
IC2C
5
67
RL2B
1
32 4
RL2A
1
32 4
DOOR
OPENER 1
DOOR OPENER SW
DOOR OPENER
OFF=0V
ON=5V
0
5
OPEN
DOOR
OPENER 2
0
5CONNECT

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
KX-TA308 CALLER ID CARD (1/2)
D3A
R2A
220K
C4A
470P
D4A
R7A56K
D2A
R5A
56K
+5V
C5A
0.1
R1A
220K
R6A
1.5M
C3A
470P
+5V
D1A
IC1A
CALL ID IC
IN+
IN-
GS
VRef
CAP
TRIGin
TRIGRC
TRIGout
MODE
OSCin
OSCout
VSS
13
14
15
16
17
18
19
20
21
22
23
24
R17A
10K
R5B
56K
C3B
470P
R6B
1.5M
R2B
220K
R1B
220K
C4B
470P
C5B0.1
R17B
10K
R7B
56K
IC1B
CALL ID IC
IN+
IN-
GS
VRef
CAP
TRIGin
TRIGRC
TRIGout
MODE
OSCin
OSCout
VSS
13
14
15
16
17
18
19
20
21
22
23
St/GT
24
VDD
R5C
56K
C3C
470P
R6C
1.5M
R2C
220K
R1C
220K
C4C
470P
C5C 0.1
R17C
10K
R7C
56K
IC1C
CALL ID IC
IN+
IN-
GS
VRef
CAP
TRIGin
TRIGRC
TRIGout
MODE
OSCin
OSCout
VSS 13
14
15
16
17
18
19
20
21
22
23
24
+5V
C14
0.022
R8A 390K
R9A
10K D6A
C6A
0.047
+5V
C6B
0.047
+5V
R8B 390K
D6B
R9B
10K
C6C
0.047
+5V
R8C390K
D6C
R9C
10K
R10A
82K
R11A
82K
X1
3.58M
+5V
D5A
R4A
330K
R3A
470K
C9A
0.22
D2B D1B
+5V
D3B D4B
+5V
R10B
82K
R11B
82K
D2C D1C
+5V
D3C D4C
+5V
R10C
82K
R11C
82K
R4B
330K
C9B 0.22
R4C
330K
C9C
0.22
D5B
+5V
R3B
470K
D5C
+5V
R3C
470K
R19A
100K
R19B
100K
R19C
100K
IC11
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
P34
P35
P36
P37
P40
P41
P42
P43
P44
P45
P46
P47
55
56
57
58
59
60
61
64
2
12
23
63
68
69
70
71
72
74
75
76
33
73
3
22
62
43
P00
P01
P02
P03
P04
P05
P06
P07
77
78
79
80
66
65
67
1
31
32
34
35
52
42
CN1
2T1
1R1
3
T1
CN1
6
4
8
CN1
7
9
5
15
14
16
19
18
17
R28B 47K R29B 47K R30B 47K R31B 47K R27B 47K
R26B
47K
+5V
R27C 47K
R26C
47K
R31C 47K R30C 47K R28C 47K R29C 47K
R27C 47K R28C 47K R30C 47K
R26C
47K
R31C 47K R29C 47K
+5V
+5V
C57A 2200P C56A 2200P R62A 24K R50A 24K
R62B 24K C56B 2200P C57B 2200P R50B 24K
C57C 2200P R50C 24K R62C 24K C56C 2200P
C53A
0.068
R57A
10K
C52A
0.068
IC17A
5
6
7
IC17A
3
2
1
R58A
18K
+5V
R59A
10K
R56A
5.6K
C51A
3300P
R54A
390K
R55A
2.2K
R53A
220K
D50AR52A
4.7K
C50A
0.22
Q50A
R51A
100K
+5V
R50A
0
R53B
220K
R50B
0
C51B
3300P
R58B
18K
R54B
390K C53B
0.068
+5V
C52B
0.068 R57B
10K
R52B
4.7K
Q50B
R59B
10K
R56B
5.6K
C50B
0.22
R55B
2.2K
R51B
100K
D50B
+5V
IC17B
3
2
1
IC17B
5
6
7
R53C
220K
R50C
0
C51C
3300P
R58C
18K
R54C
390K C53C
0.068
+5V
C52C
0.068 R57C
10K
R52C
4.7K
Q50C
R59C
10K
R56C
5.6K
C50C
0.22
R55C
2.2K
R51AC
100K
D50C
+5V
IC17C
3
2
1
IC17C
5
6
7
C55A
3300P
R60A
220K
C55B
3300P
R60B
220K
C55C
3300P
R60C
220K
COL1
COL2
COL3
COL4
ROW1
ROW2
ROW3
ROW4
CALLSTDA
CALLSTDC
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
CALLSTDB
FSKB
FSKC
FSKA
IC
PWDN
FSKen
DCLK
DATA
DR
CD
INT
StD
ESt
St/GT
VDD
T3
R3
T3
PAY2
PAY1
PAY3
DIAL3
DIAL2
DIAL1
IC
PWDN
FSKen
DCLK
DATA
DR
CD
INT
StD
ESt
St/GT
VDD
T2
P50
P51
P52
P53
P54
P55
P56
P57
VSS
VSS
VSS
VSS
D0
D1
D2
D3
D4
D5
D6
D7
VDD
VDD
NC
NC
NC
NC
A0
A1
A2
A3
RD
WR
CS
RST
P60
P61
P62
P63
VSS
VSS
13
14
15
16
17
18
19
20
21
24
25
26
27
28
29
30
36
37
38
39
40
41
44
45
46
47
48
49
50
51
53
54
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
IC
PWDN
FSKen
DCLK
DATA
DR
CD
INT
StD
ESt
T2
R2
CALL ID IC
CALL ID IC
CALL ID IC
3.58 MHz
INCOMIG CALL ID DATA
(FSK)
STB1
STB2
G/A
DTMF
GENERATOR
CONTROL
ADDRESS
DATA
0
5
0
5

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
KX-TA308 CALLER ID CARD (2/2)
X2
4.9152M
R18
1M
C15
18P
C10
18P
HC139
IC7
2
G1
3
+5V
+24V
C44 33
C18A0.1
Q41
R41
47K
+12V
Q40
R42
47K
Q42
R40
47K
IC10
89
6
IC10
10 11
12
IC10
12
13
IC14
VDD 7 VSS 1
18
4
5
6
17
16
15
14
11
C40
0.1
R43
4.7K
C30
0.022
+5V
C43 33
R47
2.7K
D40
12V
C46
47
Q43
+12V
R46
47K
C41
0.0082
C42
0.0015
R45
12K R44 0
IC15
3
21
C11
0.022
IC15
8
4
6
5
+12V
R3247K R3347K R3447K R3547K R3647K R3747K R3847K R3947K
IC3A
DSR2
CTS2
RCVDT2
DTR2
RCVDT1
DTR1
RTS1
TRNDT1
GND
VCC
CLK
RCVCLK2
TRNCLK2
RCVCLK1
TRNCLK1
DSR1
CTS1
RTS2
TRNDT2
IC3C
DSR2
CTS2
RCVDT2
DTR2
RCVDT1
DTR1
RTS1
TRNDT1
GND
47
VCC
40
CLK
33
RCVCLK2
TRNCLK2
RCVCLK1
TRNCLK1
DSR1
CTS1
RTS2
TRNDT2
C8C
0.022
+5V
C8A
0.022
+5V
R14A47K
R13A47K
R14B47K
R13C
47K
R14C
47K
R14D
47K R15D
47K
R13B47K
R13D
47K
IC16
12
IC16
34
IC16
14
7
11
13
5
9
+5V
C13
0.022
IC7
16
8
13
14
15
+5V
C7
0.022
R12
47K
+5V
R16
47K
C61
0.1
CN1
25 D0
26 D1
27 D2
28 D3
29 D4
30 D5
31 D6
32 D7
40 RESET
37 IORD
38 IOWR
39 A0
42 A1
24 A2
45 A3
43 A4
48 A5
46 CS(CALL)
CN1
41 CO3(CO8)
47 MODEMRXD
34 CO2(CO7)
49 MODEMTXD
33 CO1(CO6)
44 CS(MODEM)
50 MODEMINT
10 OPEN
11 OPEN
12 OPEN
13 OPEN
22 +5V
23 +24V
20 CALLIDCARD
21 PAYTONECARD
35 AG
36 AG
+12V
C12
0.022
IC10
14
7
5
J1
+5V
+5V
C54A
0.022
IC17A
8
4
+5V
C54B
0.022
IC17B
8
4
+5V
C54C
0.022
IC17C
8
4
COL1
COL2
COL3
COL4
ROW1
ROW2
ROW3
ROW4
D0,D1,D2,D3,D4,D5,D6,D7
IORD,IOWR,RESET
IORD
IOWR
RESET
A0,A1,A2,A3 D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
RESET
IORD
IOWR
DB3
DB2
DB1
DB0
R
TRNRDY2
TRNEMP1
SYNC/BRX1
RCVRDY1
W
DB7
DB6
DB5
DB4
TRNRDY1
RST
CS1
CS2
RSLCT0
RSLCT1
RCVRDY2
SYNC/BRX2
TRNEMP2
NC
COL1
COL2
COL3
ROW1
ROW2
ROW3
ROW4
COL4
OSCO
TONE
CD
XMIT
MUTE
OSCI
NC
a
NC 10
20
19
2
12
9
13
8
3
23
20
13
26
46
37
36
32
27
15
39
5
35
30
25
22 45 44
42
41
9
17
31
29
10
6
4
3
2
1
28
34
7
12
8
11
16
18
21
D7
D6
D5
D4
D3
D2
D1
D0
A0
A1
IOWR
IORD
RESET
23
20
13
26
46
37
36
32
47
40
33
27
15
39
5
35
30
25
22 45 44
42
41
9
17
31
29
10
6
4
3
2
1
28
34
7
12
8
11
16
18
21
DB3
DB2
DB1
DB0
R
TRNRDY2
TRNEMP1
SYNC/BRX1
RCVRDY1
W
DB7
DB6
DB5
DB4
TRNRDY1
RST
CS1
CS2
RSLCT0
RSLCT1
RCVRDY2
SYNC/BRX2
TRNEMP2 SELA
SELB
Y0
Y1
Y2
Y3
4
5
6
7
D1
D2
D3
D4
D5
D6
D7
D0
A0
A1
IOWR
IORD
RESET
SERIAL-PARALLEL CONVERT
DTMF GENERATOR
DTMF AMPLIFIER
CO SELECTOR
SERIAL-PARALLEL
CONVERT IC
4.9152MHz

1
2
3
4
D
1
C
B
D
A
FG
D
A
B
C
D1
Q1
BEA2
D15
T1
BEA101
D101
C109
BEA1
1
3
9
11
LIVE
FG
NITTEURAL
F1 L1
NTC1
NTC2
PC2
Q31
D4
IC1
R9
C11
C17
R8
R5
R14 D6
PC1
C7
Q150
PC1
C110
R112
Q101
R17
47 D3
D5
Z1
Z2
R31R32
C31
R35 R34 R33 D33 D32
R38R36
C15 R7
C10
C14
R10
R16
C13
D34
C16
C12
R15
100K
D31
C1 R1
C5
C8
R21
C101
C102
D102
C104
R120VR102
C103
R121
R303
R307
C301
C303
R302
D301
R22R23
R13
R11
PC2
R151
R152
R150
R116
R110
R114
R113
D111
R111
VR101
R153
AL1
CN104
IC101
L101
BEA103
IC301
CN101
R304
R301
CN102
R305
C302 R306
IC304
26V
AC
Detect
GND
5.8V
GND
SIGNAL-
IN
SIGNAL-
OUT
IFB OVP VCC VO GND CLM CT RT SS
+VIN VEE OUT VCC
+VIN VEE OUT VCC
1
2
3
4
5
6
7
KX-TA308 POWER SUPPLY BOARD
16µs
17V 5.4V
1.9V
AC DOWN DETECTION
(SECONDARY)
AC DOWN
DETECTION
(PRIMARY)
FEED BACK CIRCUIT RINGING AMPLIFIER CIRCUIT
CONTROL
VOLTAGE
DETECTION
VOLTAGE
DETECTION
REGULATOR
POWER
AMPLIFIER
BUFFER
16µs
20Hz
10V
20Hz
240V
20Hz
24V
16µs
310V
INRUSH CURRENT PROTECTION
SWITCHING
MOS FET
LINE FILTER
SURGE ABSORBER

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14.1NOOPERATION(CHECKPOWER
SUPPLYBOARD,MAIN BOARD)
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