Panasonic KX-DT543RU / KX-DT546RU Service Manual / Supplement ▷ View online
21
2.10. EHS Does Not Work
2.10.1.
EHS (Plantronics) Does Not Work
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts: R181,IC171,R177,Q170,R175,
D171,D172,JK302,
and Jumper chip
and Jumper chip
NO
Mesure the EHSDET voltage at Pin 7 of IC150.
Is it 0V?
Is it 0V?
YES
Related parts: R185,IC173,R170,R171,R172
D170,C170,C171,and Jumper chip
NO
Measure the EHSTX signal between Pin 3 and Pin
4
of JK302.
See the communication waveform.
4
of JK302.
See the communication waveform.
Refer to the waveform (18).
YES
Related parts: R182,Q172,R180,IC172,
R176,Q171,R173,R174,
and Jumper chip
and Jumper chip
NO
Measure the EHSRX signal Pin 8 of IC150.
See the communication waveform.
See the communication waveform.
Refer to the waveform (19).
YES
Related parts: IC150,JK302
NO
Confirm the EHS communication.
Can you use the EHS?
Can you use the EHS?
YES
END
Note: Additional reference : See Table-4
22
2.10.2.
EHS (Jabra) Does Not Work
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts: R181,IC171,R177,Q170,R175,
D171,D172,JK302,
and Jumper chip
and Jumper chip
NO
Mesure the EHSDET voltage at Pin 7 of IC150.
Is it 0V?
Is it 0V?
YES
Related parts: [Main PCB] R453,IC410
[Ope PCB] R184,Q173,Q174,
R202,R203,R178,IC170,JK302,
CN160 and Jumper chip
Flat Cable (Between Main PCB and Ope PCB)
NO
YES
Related parts: R183,R182,Q172,R180,IC172,
R176,Q171,R170,R171,R172,
R173,R174,C170,C171,D170,
and Jumper chip
R173,R174,C170,C171,D170,
and Jumper chip
NO
Measure the JABRA_URX signal at Pin 10 of
CN160.
See the communication waveform.
CN160.
See the communication waveform.
Refer to the waveform (21).
YES
Related parts: IC150,JK302
NO
Confirm the EHS communication.
Can you use the EHS?
Can you use the EHS?
YES
END
Measure the JABRA_URX signal at Pin 10 of IC410
on Main PCB.
See the communication waveform.
on Main PCB.
See the communication waveform.
Refer to the waveform (21).
YES
NO
Related parts: [Main PCB] R454,CN400
[Ope PCB] CN160, and Jumper chip
Flat Cable (between Main PCB and Ope PCB)
Note: Additional reference : See Table-4
Measure the JABRA_UTX signal between Pin 1
and
and
Pin 4 of JK302.
See the communication waveform.
Refer to the waveform (20).
23
3 Schematic Diagram
Changed from Original Service Manual as section 11.1.
3.1.
Main No.1
(1)
(2)
(3)
(4)
(2)
(3)
(4)
(5)
(6)
(7)
(7)
(8)
(9)
(10)
(10)
(11)
(12)
KX-DT543/KX-DT546 MAIN BOARD NO.1 (1/2)
(4) Clock (IC300:ASIC1) 16.384MHz
(8) IC300(ASIC1) - IC410(DCX81) signal (Reset)
(9) IC300(ASIC1) -IC410(DCX81) signal (SPI2)
(10) IC300(ASIC1) - IC410(DCX81) signal (PCM)
(11) DPT - PBX signal (Receiving signals)
(16) DXDP signal (Receiving signals)
C
E
B
A
D
F
3
2
4
DG
DG
DG
SPI2_DO
PCM_RXD
PCM_TXD
PCM_FSYNC
SPI2_DI
PCM_SCLK
SPI2_CS
SPI2_CLK
RESET
CK4M
VCC33
PEP1
PSYNC
DG
INTN
DG
R324 820
R323
1M
GPIO3
GPIO4
C323 0.1u
C324
0.1u
C326 0.1u
C327 1000p
C328
1000p
C329
1000p
C362 0.01u 16
X301
16.384M
C566
NC
AGND
DG
R561
NC
PG
DG
R562
NC
0
3
3
Rk
1
C563
NC
C564
NC
C565
NC
C567
NC
k
1
2
3
3
R
k
1
1
3
3
R
0
7
2
3
3
3
R
C572
NC
C573
NC
C383
7p
C382
7p
R334
R571
NC
R572
NC
R573
NC
AGND
DG
IC300
13
CK4M
14
VSS2
15
GPIO0
16
VSS3
17
GPIO1
18
GPIO2
19
VDD1
20
GPIO3
21
DVRL
22
DDR
23
DVRH
24
NC1
5
2
4
O
I
P
G
6
2
L
R
V
P
7
2
R
D
P
8
2
H
R
V
P
9
2
2
C
N
0
3
2
D
D
V
1
3
4
S
S
V
2
3
1
X
D
P
3
3
0
X
D
P
4
3
5
O
I
P
G
5
3
6
O
I
P
G
6
3
7
O
I
P
G
37
VSS5
38
OSI
39
OSO
40
VSS6
41
INTN
42
VSS7
43
VDD3
44
NC3
45
STEST0
46
STEST1
47
DDX0
48
DDX1
1
N
T
S
R
2
R
S
O
3
0
P
E
O
4
1
P
E
O
5
C
N
Y
S
O
6
1
S
S
V
7
K
L
C
O
8
X
S
O
9
X
T
I
P
S
0
1
X
R
I
P
S
1
1
K
L
C
I
P
S
2
1
S
C
I
P
S
24
(1)
(2)
(3)
(4)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
KX-DT543/KX-DT546 MAIN BOARD NO.1 (2/2)
(11) DPT - PBX signal (Receiving signals)
(12) DPT - PBX signal (Transmitting signals)
(12) DPT - PBX signal (Transmitting signals)
(12) DPT - PBX signal (Transmitting signals)
(12) DPT - PBX signal (Transmitting signals)
(16) DXDP signal (Receiving signals)
(17) DXDP signal (Transmitting signals)
(17) DXDP signal (Transmitting signals)
(17) DXDP signal (Transmitting signals)
(17) DXDP signal (Transmitting signals)
+
!A
-
!A
6
5
8
7
A
B
C
D
E
F
JK300
1
2
3
4
5
JK301
1
2
3
4
5
L301
L302
T300
1
2
4
5
6
7
10
9
8
DG
R301
270
R302
22
R303
22
D301
1
2
3
VDD33
VDD33
DG
VDD33
VDD33
DG
R309
1.2k
R310
120
R311
1.8k
DG
DG
Q303
Q304
1
E1
2
B1
3
C2
4
E2
5
B2
6
C1
C303
1000p 50
C302
1000p
50
VCC33
VDD33
VCCA33
C301
NC
L
H
T
R
H-D
L-D
C305
1u
10
C304
1u
10
R306
8.2k
R307
5.6k
R308
12k
C306 0.1u 10
C310 0.1u 10
C311 0.1u 10
Q301
1
E1
2
B1
3
C2
4
E2
5
B2
6
C1
R319
8.2k
R320
5.6k
R305
1.8k
R304
1.8k
C312
1000p
C313
1000p
C307
1000p
C308
1000p
C325 1u
10
R322
5.6
DG
DG
R542
NC
R545
NC
DG
C557 0.1u 16
R546
NC
C556
0.1u
50
3.3V
L222
NC
L220
NC
D315
C551 0.1u 50
3.3V
DG
R321
27
PG
PG
C309
1u
50
PG
PG
PG
C332 1u 50
C331
1u
50
R342
560
R343
330
VDD33
DG
DG
DG
C330 0.1u 10
R340
100
R341
100
R312
1.2k
R313
1.2k
Q332
1
E1
2
B1
3
C2
4
E2
5
B2
6
C1
DG
C337
1u
50
R348
330
R349
560
DG
VDD33
DG
C333
0.1u
10
DG
C334
NC
VDD33
VDD33
C335 0.1u 10
DG
C336 0.1u 10
DG
DG
R350
4.7k
R351
4.7k
R352
15k
R353
5.6k
R354
6.8k
R355
10k
DG
R537
620k
R556
750k
C552
0.015u 16
C533
8200p
R538
28k
C554
100p
IC510
1
BOOT
2
VIN
3
EN
4
SS/TR
5
RT/CLK
6
PWRGD
7
VSENSE
8
COMP
9
GND1
10
PH
11
GND2
D532
D533
L303
L304
Q331
1
B1
2
E
3
B2
5
C1
4
C2
Q330
R554
7.5k
R552
100k
C550
220u
50
R345
470
R346
4.7
R347
4.7
R541
10k
R547
30.9k
L221
NC
D300
1
2
3
4
C558
100u
16
C589
NC
L309
220u
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