Panasonic KX-NS500 / KX-NS520 / KX-NS500RU / KX-NS520RU Service Manual / Supplement ▷ View online
41
3.3.2.
Bottom View
CPU BOARD Bottom View
R210
R222
R223
R801
R802
R804
R805
R806
R807
R808
R421
R809
R422
R616
R423
R617
R425
R426
R427
R428
R810
R429
R811
R812
R237
R813
R620
R814
R239
R621
R815
R816
R623
R817
R430
R431
R626
R434
R436 R437
R438 R439
R822
R823
R440
R441
R442
C213
C408
C410
R647
R648
R649
C801
R456
C802
C804
C806
C613
R650
C614
C615
C616
R658
R659
R660
R660
LF801
R661
LF802
R662
LF803
R663
LF804
R664
R471
R665
R472
R666
R667
R473
R668
R474
R669
C630
R284
C631
R285
R479
C632
C633
R288
C635
R289
C636
R480
C639
R481
R482
R483
R485
R486
R487
C640
R488
C641
R489
C642
C643
C645
C646
C647
C648
C649
R495
R496
R497
C650
R498
C651
C652
C653
C654
D401
C655
X451
C657
C658
C659
C471
C666
C472
C667
C668
C669
D801
D802
D803
C670
D804
C671
D805
C672
D806
C673
D807
C674
D808
C675
C676
IC402
C677
IC403
IC604
C686
C687
C688
C689
IC801
IC802
C690
C691
T801
C692
T802
C693
L532
L533
R101
R103
R104
L538
R106
R107
R108
R108
R109
R301
R302
R303
R110
R111
R305
R112
R306
R308
R311
R312
R1002
R317
R319
R514
R320
R515
R1012
R517
R518
R324
R900
R519
R325
R901
R1015
R902
R903
R904
R1018
CN501
R329
R905
R906
R907
R330
C101
R331
C102
R332
R1022
C103
R333
R1023
C104
R334
R1024
C105
R529
R335
R1025
C106
R336
R337
C108
R338
C109
R339
C301
R531
C302
C303
C110
C304
R534
R340
C111
R535
R341
C112
R342
C113
R343
C114
R344
C115
R345
R346
R347
R348
R349
C504
R540
C505
C506
R350
R351
R352
R353
R354
C125
R355
C126
C127
R357
C128
R358
R359
C708
C709
C323
R360
R554
C325
R362
C326
C327
C710
R559
C711
C712
C713
R368
C714
R369
C715
C716
C717
R560
C718
R561
C719
R562
R370
R564
R371
R372
C336
R566
R373
C337
R567
R374
C720
R375
C721
C339
C722
R377
C723
C724
R378
C725
R379
C726
C727
R570
C728
C340
C729
C341
R572
C342
R575
C348
C730
C731
RXD_1
C732
C733
R388
C734
R389
C735
C736
C737
C738
C351
C739
R390
R395
R396
R397
C749
D301
D303
C750
C754
C755
Q602
L401
L402
IC301
IC302
T302
IC504
L801
TXD_1
L802
L803
L804
L805
L806
TP_DG7
R207R208
R209
R1026
R1031
R1032
R1034
R1035
R1036
R1038
R1038
R1041
R1042
R1043
R1044
R1045
1
2
8
7
7
1
8
14
1
3
4
5
1
7
8
2
41
40
80
1
1
DIP
REF1
42
4 Exploded View and Replacement Parts List
Changed from Original Service Manual as section 15.1.
4.1.
IC Date
4.1.1.
ASIC1
Pin No
ASIC Pin Name
IO
Function
A8
LD_IO0
I/O
Data Bus
A1
LD_IO1
I/O
Data Bus
B82
LD_IO2
I/O
Data Bus
A84
LD_IO3
I/O
Data Bus
A85
LD_IO4
I/O
Data Bus
A86
LD_IO5
I/O
Data Bus
A79
LD_IO6
I/O
Data Bus
B83
LD_IO7
I/O
Data Bus
B20
GPIO0_0
I/O
general porpose IO
B14
GPIO0_1
I/O
general porpose IO
A41
GPIO1_0
I/O
general porpose IO
B36
GPIO1_1
I/O
general porpose IO
B11
NIRQ_O0
O
Interupt signal
B15
NIRQ_O1
O
Interupt signal
B12
NIRQ_O2
O
Interupt signal
A80
NWAIT_O
O
CPU wait
A36
nOE_ABUS
Tri-O
Address bus output enable
A38
nOE_DBUS
Tri-O
Data bus output enable
A51
DBUS_DIR
O
Bus direction signal
A81
NCS1_I
I
Chip select 1
B79
NCS2_I
I
Chip select 2
B80
NRD_I
I
Read signal
A83
NWR_I
I
Write signal
B59
LAC_I0
I
Address bus
A64
LAC_I1
I
Address bus
A67
LAC_I2
I
Address bus
B68
LAB_I00
I
Address bus
A72
LAB_I01
I
Address bus
A71
LAB_I02
I
Address bus
B62
LAB_I03
I
Address bus
A66
LAB_I04
I
Address bus
A70
LAB_I05
I
Address bus
B65
LAB_I06
I
Address bus
B61
LAB_I07
I
Address bus
A65
LAB_I08
I
Address bus
B69
LAB_I09
I
Address bus
B66
LAB_I10
I
Address bus
A68
LAB_I11
I
Address bus
B63
LAB_I12
I
Address bus
B64
LAB_I13
I
Address bus
A58
NCS_BASE_O
O
Chip select
B2
NCS_DSP_O0
O
Chip select
A2
NCS_DSP_O1
O
Chip select
A7
NCS_SRM_O
O
Chip select
A15
nOE_RST
O
reset controll
A13
NRST_EXT_O0
O
Extension #0 reset
A14
NRST_EXT_O1
O
Extension #1 reset
B8
NRST_EXT_O2
O
Extension #2 reset
A12
NRST_EXT_O3
O
Extension #3 reset
A9
NRST_EXT_O4
O
Extension #4 reset
A21
LED_O0
O
LED Controll #0
B19
LED_O1
O
LED Controll #1
B21
LED_O2
O
LED Controll #2
A22
LED_O3
O
LED Controll #3
B78
CARDID_I0
I
card ID
A82
CARDID_I1
I
card ID
B75
CARDID_I2
I
card ID
B77
CARDID_I3
I
card ID
43
A23
EXPID_I0
I
Expansion ID
B22
EXPID_I1
I
Expansion ID
A3
DSPID_I3
I
DSP ID
B3
DSPID_I2
I
DSP ID
A87
DSPID_I1
I
DSP ID
A88
DSPID_I0
I
DSP ID
A46
RMTDET_I
I
Remote Card detect
B17
SHUT_STT_I
I
LED shutdown mode indicator
A52
NETREF_I0
I
NETREF from EXP card
A27
NETREF_I1
I
NETREF from EXP card
B32
NETREF_I2
I
NETREF from EXP card
A30
NETREF_I3
I
NETREF from EXP card
B28
NETREF_I4
I
NETREF from EXP card
A34
NIRQ_EXT_I0
I
IRQ from BASE card
A39
NIRQ_EXT_I1
I
IRQ from BASE card
B10
NIRQ_EXT_I2
I
IRQ from BASE card
B1
NIRQ_EXT_I3
I
nDSP_INT#0
B84
NIRQ_EXT_I4
I
nDSP_INT#1
A45
NWAIT_BASE_I
I
CPU BUS wait from BASE CARD
B26
DHW_CPU
O
DOWN high way to CPU
A26
UHW_CPU
I
Up Highway to CPU
B33
DHW_RMT
O
DOWN high way to Remote
A33
UHW_RMT
I
Up Highway to Remote
B6
UHW_DSP0
I
Up highway to DSP
A10
DHW_DSP0
O
Down highway to DSP
B7
UHW_DSP1
I
Up highway to DSP
A11
DHW_DSP1
O
Down highway to DSP
B57
DHW_BASE0
O
DOWN high way to BASE CARD
A62
DHW_BASE1
O
DOWN high way to BASE CARD
B58
DHW_BASE2
O
DOWN high way to BASE CARD
A63
DHW_BASE3
O
DOWN high way to BASE CARD
A69
DHW_BASE4
O
DOWN high way to BASE CARD
A61
UHW_BASE0
I
UP high way to BASE CARD
A60
UHW_BASE1
I
UP high way to BASE CARD
A59
UHW_BASE2
I
UP high way to BASE CARD
B56
UHW_BASE3
I
UP high way to BASE CARD
B34
UHW_BASE4
I
UP high way to BASE CARD
A53
HWCLK0
O
Highway clock signal
B48
HWCLK1
O
Highway clock signal
A40
HWCLK2
O
Highway clock signal
B38
HWCLK3
O
Highway clock signal
A35
HWCLK4
O
Highway clock signal
A54
HWCLK5
O
Highway clock signal
B49
HWCLK6
O
Highway clock signal
B23
HWCLK7
O
Highway clock signal
A42
HWCLK8
O
Highway clock signal
B5
HWCLK9
O
Highway clock signal
A56
FSYNC0
O
Highway Frame sync
A55
FSYNC1
O
Highway Frame sync
B50
FSYNC2
O
Highway Frame sync
B52
FSYNC3
O
Highway Frame sync
A57
FSYNC4
O
Highway Frame sync
B54
FSYNC5
O
Highway Frame sync
B53
FSYNC6
O
Highway Frame sync
B29
FSYNC7
O
Highway Frame sync
B40
FSYNC8
O
Highway Frame sync
A20
FSYNC9
O
Highway Frame sync
A29
MC_FH_O
O
Frame sync signal
A32
MC_DHW_O0
O
DOWN High Way to EXP card
A28
MC_DHW_O1
O
DOWN High Way to EXP card
B27
MC_DHW_O2
O
DOWN High Way to EXP card
B31
MC_DHW_O3
O
DOWN High Way to EXP card
A25
MC_UHW_I0
I
UP High Way from EXP card
B24
MC_UHW_I1
I
UP High Way from EXP card
A24
MC_UHW_I2
I
UP High Way from EXP card
A31
MC_UHW_I3
I
UP High Way from EXP card
A48
PT_TXA_O0
O
Proprietary Phone control
Pin No
ASIC Pin Name
IO
Function
44
B44
PT_TXA_O1
O
Proprietary Phone control
B37
PT_TXB_O0
O
Proprietary Phone control
A37
PT_TXB_O1
O
Proprietary Phone control
B47
PT_RXA_O0
I
Proprietary Phone control
A50
PT_RXA_O1
I
Proprietary Phone control
B45
PT_RXB_O0
I
Proprietary Phone control
A49
PT_RXB_O1
I
Proprietary Phone control
B72
MOH_SCK_O
O
High Way clock to EXP card
B70
MOH_nCS_O
O
High Way select to EXP card
A75
MOH_nWP_O
O
SROM write protect
A76
MOH_nRST_O
O
SROM reset
A73
MOH_DO
O
SROM data out
A74
MOH_DI
I
SROM data in
A47
CLK25MOUT
O
25MHz Clock
A5
CK50M
I
50MHz clock
A16
CK24M
I
24MHz clock
B74
CK16M_I
I
16MHz clock
A19
NRST_I
I
reset signal input
A78
MSSEL
I
ASIC Mode select signal
A18
nBUSOE_CONT
I
Bus output enable
A44
TEST0
I
B43
TEST1
I
A43
TEST2
I
B42
STS_LEDR
I
LED Controller
A4
MDSEL1
I
ASIC Mode select signal
A6
MDSEL0
I
ASIC Mode select signal
B41
STS_LEDG
I
LED Controller
B4
VDDIO
VCC
B9
VDDIO
VCC
B25
VDDIO
VCC
B30
VDDIO
VCC
B55
VDDIO
VCC
B60
VDDIO
VCC
B71
VDDIO
VCC
B81
VDDIO
VCC
B13
VDDCORE
VCC
B18
VDDCORE
VCC
B35
VDDCORE
VCC
B39
VDDCORE
VCC
B46
VDDCORE
VCC
B51
VDDCORE
VCC
B67
VDDCORE
VCC
B76
VDDCORE
VCC
B16
PLLVDD2
VCC
A77
PLLVDD1
VCC
A17
PLLVSS2
GND
B73
PLLVSS1
GND
B85
VSS
GND
Pin No
ASIC Pin Name
IO
Function
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