Panasonic KX-DT321UA Service Manual ▷ View online
29
KX-DT321UA/KX-DT321UA-B
(j)
(k)
(m)
(n)
(p)
(q)
(r)
(s)
(t)
(u)
(v)
(w)
(x)
(y)
(z)
(A)
(B)
(C)
(D)
(E)
(F)
(14)
(15)
(16)
1/4
2/4
3/4
4/4
KX-DT321
UA
/KX-DT321
U
A
-B :
MAIN BO
ARD (4/4)
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
ADR5
INTN
REN
WEN
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
ADR0
ADR1
ADR2
ADR3
ADR4
D3.3V
D3.3V
C406
12P
Q31
1
2
3
4
5
Q32
1
2
3
4
5
Q34
1
6
2
4
3
5
Q35
1
6
2
4
3
5
Q33
1
6
2
4
3
5
OP0/DR
27
CLM5
8
CLM4
9
CLM3
10
CLM2
11
CLM1
12
CLM0
13
NRDW3
14
NRDW2
15
NRDW1
16
NRDW0
18
45
CK8M/16M
57
DB7
58
DB6
59
DB5
60
DB4
61
DB3
62
DB2
63
DB1
64
DB0
50
ADR5
51
ADR4
52
ADR3
53
ADR2
54
ADR1
55
ADR0
4
WEN
3
REN
6
INTN
42
RESET
41
SCAN
43
SCANE
29
TEST
5
WAITN
40
MMODE
A3.3V
AG
IC1
1
CREG
2
ENB
3
RT
4
GND
5
IN
6
VBIAS
7
OUT
8
VCC
DG
D3.3V
C6
Z0.1
C9
Z0.01
DG
V1
C2
Z0.1
50V
D2
C5
220P
DG
AG
C3
Z0.1
DG
C7
6.3V100
LED13
CO1
LED9
CO5
LED10
CO4
LED6
CO8
LED11
CO3
LED7
CO7
LED12
CO2
LED8
CO6
LED5
SP-Phone
LED2
MUTE
LED3
STORE
LED4
MESSAGE_R
LED1
INT
DG
DG
DG
DG
DG
IC7
1
VOUT
2
VIN
3
NC
4
VSS
DG
C407
Z0.1
C1
50V33
L5
330u
C4
Z0.1
Q4
E
C
B
RA3
1k
1
34
5
6
7
8
C13
NC
C14
NC
AG
DG
D3.3V
A3.3V
L6
0
L7
0
C8
10V470
J1
R7
1.2K
R313
27
R312
8
2
R9
3.3
[2125]
R6
2.7K
R304
1k
R300
1k
R306
1
50
R1
220K
R310
120
R5
22K
R2
6.8K
R129
5.6K
R3
10K
R309
220
R307
220
R308
56
R407
47k
R403
180
R311
56
GG
G
R
R
GG
R
R
R
R
G
R
G
R
GG
R
R
R
G
R
R
2
30
KX-DT321UA/KX-DT321UA-B
10.2. Waveform
(3) Pin45 of IC2 8.196MHz
(1) Pin42 of IC2 and PIN8 of IC6
(5) Pin4 to 6 of CN5
(4) Pin36 of IC2 Communication waveform
(2) Pin48 of IC2 16.384MHz
(6) Pin3 and 6 of IC3
PCM interface waveform between IC3 and IC2
D3.3V
Pin42 of IC2 and Pin8 of IC6
send data to PBX
receive data from PBX
Pin36 of IC2
CN5 pin4
CN5 pin6
CN5 pin5
CN5 pin3
Pin2 of IC3
Pin1 of IC3
Pin6 of IC3
Pin3 of IC3
31
KX-DT321UA/KX-DT321UA-B
(7) Pin8 and 10 of IC4
PCM interface waveform between IC4 and IC3
(8) Pin31 of IC2
Pin7 of IC4
Pin9 of IC4
Pin8 of IC4
Pin10 of IC4
send data
to DPT of DXDP
to DPT of DXDP
receive data
from DPT of DXDP
from DPT of DXDP
32
KX-DT321UA/KX-DT321UA-B
11 Printed Circuit Board
11.1. Main Board
11.1.1. Component View
DG
R108
R109
R110
R111
R307
R308
R133
C105
C106
C114
C115
C116
C547
C548
DA2
PSUP1702Z -A
A
PbF
8
7
14
1
1
2
6
5
5
1
1
2
R600
R604
HS-MIC
R619
R620
R621
R622
R623
R624
R624
C600
H
HD/HD-AG
L
RA2
C623
H-DXDP
D1
JK1
JK2
JK3
JK4
R306
R309
R311
R312
R313
L1
L2
L3
L4
HS-SP
R138
R139
C110
C112
C113
C117
C118
C119
C120
Q3
HD-SP
Q5
Q6
C545
C546
C549
T1
T2
Q601
L-DXDP
CN4
CN5
CN6
C10
C11
C12
HD-MIC
IC10
PSUP1702Z -B
PbF
A
R130
R132
C109
C111
DA1
R104
1
4
5
8
R607
C609
R100
R131
C102
C103
C104
IC5
Q1
R608
R609
R605
G1
R601
R602
C602
R610
R611
C605
V1
C607
C606
IC7
IC6
49
48
33
32
17
16
1
64
R400 R401
R403
C401
C403
C404
C405
C406
C407
R101
R105
R106
R107
IC2
C551
X1
17
16
1
64
32
33
49
C400
R102
R103
C100
C101
C550
D3.3V
D5V
C601
H-SW
C603
C604
L5
IC8
D61
D62
D63
1
5
C1
C3
1
4
5
8
C9
D2
IC1
R5
C5
C6
C7
C8
R310
L6
L7
R512
C506
C514
C528
R6
R7
R9
C13
C14
1
2
AG
C2
C4
MIC3
R506
R511
AG2
Q4
R1
R2
R3
C541
C543
CN2
R407
IC22
Q34
Q35
Q52
R300 R304
R504
R507
R522
R531
R532
R533
R534
C507
C511
C512
C515
C517
C519 C520
C530
C531
1
4
5
8
1
1
15
16
R402
R406
C402
RA1
RA3
Q31
Q32
Q33
R115
R117
R119
R129
R513
R514
R516
R517
R518
PN9
R530
IC4
C502
C508
C516
C522
C529
SPN
SPP
CN1
C608
IC3
C518
C523
C542
1
8
9
16
1
RA4
C521
A3.3V
R509
R510
C509
30
C513
R500
C559
R501
8
1
5
IC9
C534
C526
Q51
R527
C525
C556 C557
R528
C544 C500
R606
CN3
SP1
SP2
MIC1
MIC2
R502
R520
R524
R525
R529
C501
C510
L52
L53
L54
C532
C533
C538
C539
C552
C553
C554
C555
C558
1
8
C621
R503
R521
R523
R526
C503
C504
AG1
L51
C527
C535
C536
C537
C540
IC11
KX-DT321
UA/KX-DT321UA-B : Component View
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