Panasonic KX-NT553RU-B / KX-NT556RU-B Service Manual ▷ View online
73
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
12.6.6.
No.(23(2))
(23) PC port TX/RX (1000Base) (2)
Between pin8 and pin9 of IC301
74
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
13 Printed Circuit Board
13.1. Main Board
13.1.1.
Component View
KX-NT553
58/KX-NT55658 MAIN BOARD
COMPONENT VIEW
BL-1N
BL-1P
T1SSCLK
BL-2N
BL-2P
F301
CL501
DG2
CL502
CL503
CL504
DG4
DG6
SPM
SPP
F700
ST0
ST1
ST2
ST3
Q301
TCK
L104
L105
L106
L108
TDI
L303
TDO
L305
L306
L308
L502
L310
L507
L509
L510
L704
JK102
MICM
MICP
R102
R103
GPIO0
R104
GPIO1
R105
JK301
GPIO2
R106
JK302
GPIO3
R107
OPE-GND
GPIO4
R108
GPIO5
R109
GPIO6
R303
R304
R110
R305
R111
R306
R112
R308
R114
R309
R115
R116
R117
R501
R119
R502
R503
R310
JK700
R504
R311
R505
R506
R507
R314
R120
R509
R123
R703
R127
R510
R512
R513
R708
R514
R321
R515
R516
R324
R131
R519
R326
CN501
R712
CN502
R713
CN505
CN506
R522
R523
R331
C101
R332
C102
R333
C103
R335
C105
R336
C106
C109
R530
R531
C301
C302
R532
R727
C303
R533
C304
R534
C305
R342
C112
R536
R537
R343
C113
R538
C308
R345
R539
R346
C116
C117
C118
C119
C502
TMS
C310
R541
R542
C312
R543
C313
R544
C120
C315
R351
C509
R352
C122
R547
R353
C317
C318
C125
C126
C127
C510
C705
X501
C129
X502
C707
R550
R551
C322
R552
C324
C325
C519
R556
C327
C133
R558
C134
C135
C712
C713
C137
C138
C139
C718
R560
R561
C332
C526
C333
C527
C528
C140
C335
C529
C141
R566
C336
C142
C337
C338
C144
C145
R569
DCIN1
C531
C149
C532
DCIN3
C533
C534
C340
C535
C341
CL615
C536
R572
C343
R573
C344
C150
C345
C539
R576
C346
C347
C348
R579
C349
C732
C541
C542
C543
C544
C350
R581
C351
C545
R582
C352
C546
R583
C548
R584
C549
R585
D101
R586
C356
D102
C357
C358
C359
R589
D106
D107
C550
D108
C551
D109
C552
C360
D301
C361
D302
C362
C556
D303
C363
C557
C364
C558
C365
C559
C366
C172
C367
C368
C751
C369
C176
C561
D501
D502
D503
C370
C371
C372
C373
C374
C180
C375
C181
C376
C377
C378
C184
C379
C762
C763
C764
C765
C766
C767
C380
C769
IC301
C381
C382
IC302
C383
C384
T301
C385
T302
C386
C193
C770
C388
C194
C771
C389
C772
C773
C774
C580
C775
C581
IC501
IC502
C390
C391
C392
C393
C588
C394
C589
C395
C590
C591
C592
IC706
TRST
T1SSCLK
TDO
TCK
TMS
TDI
TRST
ST0
ST1
ST1
ST2
ST3
1
128
1
32
65
15
33
1
1
15
1
NT553
NT556
1
1 2
96
97
1
12
12
1
24
24
12
1
8
1
8
NT551
F301
1.0A
F700
3.0A
PNLB2256ZA-GW
A9
A1
R1
R8
P9
REF-2
/DIP
1
14
25MHz
12MHz
USB-P
USB-M
USB-V+
USB-G
2
5
NT551
NT553
NT556
DG
DG
DG
DCIN1
13
13
DCIN1
75
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
13.1.2.
Bottom View
REF-1
RS
TU
VW
XY
Z
1
2
3
4
5
6
7
8
9
AB
CD
EF
GH
I
DG
DCIN
L2SW
+1.0V
DDR-1.8V
+1
2V
DG1
+3.3V
HE
AD
SE
T-
OU
T
PWR-RST
DCIN1-1
Po
E-
AN
Po
E-
AP
Po
E-
BN
Po
E-
BP
BK
LT
1N
BK
LT
1P
BKLT2N
BKLT2P
I C 1 0 1
+5V
IC701
IC
70
4
+1.2V
+1.8V
SP
-M
SP
-P
MI
C-
M
DG
DG
PNLB2256ZA-GW
USB-GND
USB-P
USB-M
USB-V+
HEADSET-IN
MI
C-
P
C200
C201
C202
C203
C204
C205
C206
C209
C400
C401
C402
C403
C404
C405
C406
C407
C216
C410
CL301
CL302
DG3
CL505
CL506
CL507
CL508
CL705
CL321
CL322
CL323
Q101
Q102
L101
L102
L103
L107
L109
L301
L302
L304
L110
L307
L309
L115
L501
L503
L504
L311
JOINT101
L505
L312
L506
L313
JOINT103
L508
L314
L701
L702
L703
L706
L710
R101
R302
R307
R113
R118
R312
R313
R508
R315
R121
R122
R316
R317
R700
R318
R124
R701
R319
R125
R702
R126
R128
R704
R705
R511
R129
R706
R707
R320
R709
R323
R517
R130
R518
R132
R133
R327
R134
R710
R711
R714
R520
R521
R716
R717
R524
R718
R719
R525
R526
R527
R334
R528
C104
R529
C107
C108
R338
R720
R723
R724
R726
R728
R340
C110
R729
C111
R535
C306
C307
R344
C114
C115
R730
R348
R731
R349
C501
R732
R733
C503
R734
R540
C504
R735
C505
C506
C507
R350
C508
R738
C121
R545
R546
C123
C124
R354
R548
R549
R355
C701
R356
C702
R357
C703
C128
C704
R358
R740
R359
C511
C512
C706
C513
C708
C514
C321
C709
C515
PoE-AN
C516
C323
R553
C517
PoE-AP
R360
R554
C518
C130
R361
R555
R362
R363
R557
R364
C710
R365
R559
C711
C136
C520
C714
C715
C521
C716
C522
C717
C523
C330
C524
C719
C525
PoE-BN
R562
R563
PoE-BP
R564
R565
C143
R567
C720
R568
C339
C721
C722
C146
C723
C724
C530
C725
C726
C727
C728
R570
C729
R571
C342
C537
R574
C538
R575
C151
C152
R577
C153
R578
C730
C154
C731
C155
C156
C733
C157
C734
C158
C540
C735
C159
C736
C737
R580
C738
C739
C547
C353
C354
C160
C161
C162
C163
D103
R587
C164
C740
D104
R588
C741
C166
C742
C743
C167
C744
C745
C169
C746
C747
C748
C749
D304
D305
C171
D306
D307
D308
C174
C750
D309
C752
C753
C177
C754
C178
C560
C755
C179
C756
C562
C757
C563
C758
D310
C759
D311
C565
D312
C566
D313
C567
D314
C568
D315
IC101
D316
C182
D317
C183
C760
D318
C761
D319
C185
C186
C187
C188
D705
C189
C572
D707
C768
D320
D321
C575
D322
D323
C577
D324
C578
C190
C191
C192
C387
C195
C196
C197
C198
C199
C582
C583
C584
IC504
C585
C586
C396
C397
C398
IC701
C399
IC702
IC703
25
48
1
24
CL-SPM
CL-SPP
CL-MICM
KX-NT553
58/KX-NT55658 MAIN BOARD
BOTTOM VIEW
C2
04
C205
C206
L110
R101
R128
R728
R548
R549
C146
C153
C1
95
R726
R7
30
C7
01
C702
C7
06
C7
11
C7
17
C7
46
C759
C5
77
L3
07
L3
09
L701
R7
29
L301
L3
02
L115
R710
R714
R731
C708
C715
C7
21
C724
C729
C730
C731
C747
C7
57
C760
L7
03
IC703
Q1
02
L1
01
L3
04
C716
C7
27
C7
33
D7
05
L1
02
L1
03
L107
L109
L5
03
C108
C124
C152
C1
55
R587
R588
C4
01
C4
04
L5
05
L710
R719
R3
54
R3
55
R3
57
R3
59
C7
48
C7
49
C7
50
C754
C7
58
C761
C3
96
C3
97
L5
01
L5
08
C578
C400
C402
C4
03
C405
C406
C407
L3
11
L3
12
R356
R3
58
R3
60
D3
20
D321
D3
22
D323
D324
C3
87
C398
L3
13
L3
14
R3
61
C756
C399
L702
IC504
CL_VDD18V
DG1
HEADSET-OUT
HEADSET-IN
DCIN1_1
CL_VDD12V
L7
06
+3.3V
DG5
BKLT2N
BKLT2P
+5V
L2SW-1V
BKLT1N
BKLT1P
IC704
CL-MICP
DDR-1.8V
IC
70
2
DDR-1.8V
MIC-P
-MIC-M
+12V
L2SW+1.0V
PWR-RST
+5V
+3.3V
+1.2V
+1.8V
76
KX-NT553RU/KX-NT553RU-B/KX-NT556RU/KX-NT556RU-B
13.2. Operation Board
13.2.1.
Component View
KX-NT553
58/KX-NT55658 OPERATION BOARD
COMPONENT VIEW
R221
R228
R230
R231
C207
C217
R253
C218
C221
C223
C224
D206
D244
D244
D245
D247
D256
J262
L210
L212
R254
Q202
R201
2
5
1
4
3
R210
R223
C205
C226
IC202
IC203
D246
J236
J259
J265
J274
Q203
L208
L209
R208
J276
J201
R220
IC201
Q213
R204
R205
R207
R209
Q214
R260
E
R222
R226
REDIAL
IC204
J272
Q201
J275
C206
AG_PAD
*0
45
8
FLASH/RECALL
7
PAUSE
123
123
6
456
SOFT1L
SOFT1R
SOFT2L
SOFT2R
MESSAGE
SOFT3L
SOFT3R
9
8
79
ENTER
LEFT
DOWN
D250
D251
D252
D253
CANCEL
AUTOANS/MUTE
SOFT4L
SOFT4R
RIGHT
UP
AUTODIAL/STORE
SP-PHONE
FWD/DND
D234
INT'COM
D254
HOLD
TRANSFER
CONF
J286
J288
J289
J251
J202
NEXTPAGE
D215
D219
D223
D227
J218
J219
CO1
CO2
CO3
CO4
J290
D211
D218
D222
D226
D230
D233
CO5
CO6
CO7
CO8
CO9
J260
J261
J211
J216
J220
J230
J234
J291
J297
J296
J292
J221
J215
SELF LCD
FPC
FPC
J281
J283
J249
J258
J210
J227
J232
J233
J282
J287
J293
J294
J264
J285
J284
J245
J266
J203
D210
D214
D248
D249
CO10
CO11
CO12
SELF LCD
Backlight
Backlight
HOOK_SW
PNLB2273ZC-IG
MAIN LCD
Backlight
Backlight
R241
R242
R243 R244
REF
D235
D236
D237
D238
D241
D242
J238
J240
J242
J244
J246
J248
J250
J252
RA201
R217
RA204
Q209
Q210
CN205
C201
C202
C204
R245
R246
D239
D240
J243
J253
J254
J269
J273
Q204
Q206
Q208
L211
R203
R216
C211
C245
D255
Q205
L213
R261
E
E
C203
C213
C241
C243
C244
IC205
J255
Q207
J205
R213
R214 R215
R257
R258
RA202
R259
11
12
22
1
44
23
E
R255
R202
J206
R212
R256
J295
1
14
33
J204
E
E
E
J256
#
*0
#
IC205 pin1
(ASIC Clock)
(ASIC Clock)
ASIC
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