Panasonic KX-DT521RU Service Manual / Supplement ▷ View online
21
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)
(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
KX-DT521 MAIN BOARD NO.1 (1/2)
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
C382
7p
C383
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
25
GPIO4
26
PVRL
27
PDR
28
PVRH
29
NC2
30
VDD2
31
VSS4
32
PDX1
33
PDX0
34
GPIO5
35
GPIO6
36
GPIO7
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
RSTN
2
OSR
3
OEP0
4
OEP1
5
OSYNC
6
VSS1
7
OCLK
8
OSX
9
SPITX
10
SPIRX
11
SPICLK
12
SPICS
22
(1)
(2)
(3)
(4)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
KX-DT521 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
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
C557 0.1u 16
C556
0.1u
50
3.3V
L222
NC
L220
NC
L221
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
C533
8200p
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
C552
0.015u 16
C554
100p
R538
28k
R537
620k
R556
750k
L303
L304
Q331
1
B1
2
E
3
B2
5
C1
4
C2
DG
JK301
1
2
3
4
5
Q330
R552
100k
C550
220u
50
R345
470
R346
4.7
R347
4.7
R541
10k
R547
30.9k
C589
NC
R554
7.5k
R542
NC
R545
NC
R546
NC
C558
100u
16
D300
1
2
3
4
L309
220u
23
Changed from Original Service Manual as section 11.2.
3.2.
Main No.2
(2) Clock (IC401:Flash) 103.68MHz
(13) Clock (LCD) SPI_CLK
(14) LCD - IC410(DCX81) signal (Reset)
(15) LCD - IC410(DCX81) signal (Communication)
(3) IC401(Flash)
- IC410(DCX81) signal (Communication)
(1) Clock (IC410:DCX81) 13.824MHz
C
E
B
A
D
F
3
2
4
5
DQ2
DQ1
S#
DQ3
DQ0
C
S#
DQ2
DQ1
DQ3
C
DQ0
VCC33
AGND
DG
SPP
HEADSETMIC
VCC33
PCM_TXD
DG
VCC33
MICP
VCCA33
DG
LCD_BL
C454
10u
SPI2_DO
SPI2_CLK
VCC33
C443
10u
SPI2_DI
VDD12
C404
10u
DG
C406
10u
C428
NC
DG
DG
AGND
SDA
DG
HSMICINP
MICBIAS
DG
SPI2_CS
DG
DG
HSSPOUTP
VCC33
SCL
RESET
DG
MICN
HSMICINN
PCM_FSYNC
C455
10u
SPN
IC410
83
TDI
84
TCK
85
TMS
86
RTCK
87
GPIO10
88
GPIO11/SPIM_DI
89
GPIO12/SPIM_DO
90
GPIO13/SPIM_CLK
91
GPIO14/SPIM_CS
92
VDD3
93
VCC4
94
GPIO15
95
GPIO16
96
GPIO18
97
GPIO19
98
GPIO20
99
GPIO22/XD7
100
GPIO23/XD6
101
GPIO24/XD5
102
GPIO25/XD4
103
QCSN1/EXGPIO0
104
QCSN0
105
DQ3
106
QVCC
107
DQ1
108
QSCLK
1
DQ2
2
DQ0
3
GPIO26/XD3
4
GPIO27/XD2
5
VCC1
6
XD1/EXGPIO9
7
XD0/EXGPIO10
8
XOEN/EXGPIO6
9
XWEN/EXGPIO7
10
XA0/EXGPIO8
11
XCSN3/EXGPIO5
12
VDD_DPU_DAIF
13
PLL2VSSA
14
PLL2VDDA
15
PLL1VDDA
16
PLL1VSSA
17
VDD1
18
COREOUT
19
VBAT
20
DOUBCAP2N
21
DOUBCAP2P
22
DOUBCAP1N
23
DOUBCAP1P
24
DOUT3V0
25
DOUT4V5
26
DOUT2V5/DCIN0/LIN0
27
LEDSINK2/DCIN1
28
DCIN2
29
DCIN3/LIN1
30
LEDSINK1/PWM1
31
VREF
32
VCCA
33
MIN
34
MIP
35
HSMIN
36
HSMIP
37
MPWR
38
SPOUTP
39
VCCPA
40
SPOUTN
41
HSSPOUTP
42
LOUT
43
PWM0
44
DCINS
45
XOUT
46
XIN
47
VDD_APU
48
VBAT_APU
49
VDD_IF
50
VCC_FE_IF
51
VCC_PA
52
BAL_OUT2
53
BAL_OUT1
55
ANT1
56
GND_RF
57
ANT2
58
TEST
59
RX_SW
60
LNA_INN
61
LNA_INP
62
ATST_N
63
ATST_P/EXT_LNA
64
RSTN
65
VCC_VCO
66
GPIO17/[ON/OFF]
67
VDD2
68
GPIO0/I2C_SCL
69
GPIO1/I2C_SDA
70
GPIO2/TDM_TXD
71
GPIO3/TDM_RXD
72
GPIO4/TDM_FSYNC
73
VCC2
74
GPIO5/TDM_SCLK
75
GPIO6
76
GPIO7
77
GPIO8
78
GPIO9
79
VCC3
80
USBDM/GPI28
81
USBDP/GPI29
109
GND
54
TX_SW
82
TDO
PCM_SCLK
PCM_RXD
LCD_PWR
URX
UTX
DG
R413
1M
R412
47
R411
47k
R410
47k
INTN
R416
47k
DG
R424
47k
R423
47k
DG
DG
DG
DG
DG
JRC_A
JI_A
JM_A
JC_A
JO_A
DG
AGND
U2_A
U1_A
DG_A
D460
LED+
LED-
TP_LED+
C460
22u
L460
LCD_BL
C462
1u
6.3
TP_LED-
C466
1u
25
C464
NC
C463
NC
DG
CN460
1
ESD-VSS
2
SCL
3
SDA
4
A0
5
/RES
6
/CS
7
VDD1
8
VD1
9
VSS
10
VDDA
11
VM
12
VO
13
XVO
14
VG
15
ESD-VSS
C467
1u
6.3
DG
VCC33
C461
NC
LCD_PWR
C465
NC
STRAP
DG
CN400
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AGND
3.3V
SCL
SDA
CK4M
V1.8
UTX
URX
HEADSETMIC
HEADSP
R418
10k
R419
NC
R420
NC
R422
NC
DG
R421
NC
R404
4.7k
R403
NC
R400
NC
R401
NC
R402
NC
ST3
ST2
ST1
ST0
SPI_CS0
LCD_RST
LCD_RST
LCD_A0
SPI_DO
SPI_CLK
C411 0.1u
C405
0.1u
C400
0.1u
C402 0.1u
C410 0.1u
C407
0.1u
C418 0.1u
C419 0.1u
C420
0.1u
C423
1u
C424
0.1u
C425
0.1u
C453
10u
C412 0.1u
C422
0.1u
C426
0.1u
C431
0.1u
C432
0.1u
C433
0.1u
0.1u
R238
390
R427
10
R453 NC
R454 NC
DG
VCC33
R415
NC
R417
NC
X410
13.824M
R425
47k
Q460
L410
22u
C413
10u
DG
DG
R426
10k
VCC33
R428
47k
DG
R470
NC
R471
NC
VCC33
R472
47k
VCC33
C559
10p
50
VCC33
C421
22u
DG
VCC33
C430
1u
DG
VCC33
C427 2.2u 10
VCC33
VCC33
DG
DG
VCCA33
VCC33
DG
DG
C560
0.1u
C562 2.2u
C450 0.1u
C451 NC
C561 0.1u
4.5V
1.2V
HESMIN
HESSPOUT
CL1
C490
NC
C491
NC
DG
DG
DG
R563
10
C568
0.1u
DG
IC401
1
*CS
2
DO/IO1
6
CLK
7
*HOLD/
*RESET/IO3
3
*WP/IO2
8
VCC
4
GND
5
DI/IO0
3.3V
C571
10u
6.3
R566
330
AGND
AGND
AGND
AGND
AGND
MICBIAS
R567
NC
DG
C574
NC
C575 22u
6.3
DG
L461
L462
R569
2.2k
C576 1000p
C577 1000p
C578
NC
C579
NC
R570
12k
C580
0.47u
6.3
HEADSP
R405
33
R406
33
R407
33
R408
3
3
R409
33
R441
470
R434
1k
R436
1k
R439
270
R440
270
R438
1k
R455
1k
R456
1k
R466
R464
C581 1000p 50
C582
NC
C583 NC
DG
C584
NC
DG
C416
0.1u
C442
150p
R465
1
C414
1u
C415
1u
R452 1k
DG
C440 22p
C441 22p
R435
330
R463
220
ASIC_INT
ASIC_RST
SCL
SDA
CK4M
R559
NC
R558
NC
R467
NC
IC470
1
VSS
2
VDD
3
CD
4
OUT
VCC33
DG
C468
0.1u
16
DG
R474
1k
VCC33
R473
47k
C469
4700p
50
DG
C429 0.01u
16
RSTN
KX-DT521 MAIN BOARD NO.2 (1/2)
24
KX-DT521 MAIN BOARD NO.2 (2/2)
6
8
7
A
B
C
D
E
F
AGND
DG
AGND
AGND
AGND
AGND
MICP
SPP
AGND
HSMICINN
AGND
SP2
MIP
AGND
SPN
HSMICINP
MIC1
DG
HSSPOUTP
AGND
AGND
AGND
MICBIAS
AGND
AGND
SP1
SPP
AGND
MICBIAS
SPN
AGND
MIC2
MICN
AGND
AGND
AGND
C500 1000p 50
C501 0.01u 16
C504 1000p 50
C503 NC
C507 NC
C502 330p
C506 330p
C515
NC
C516 NC
C517 NC
R517
220
R518
220
R519
2.2k
R520
2.2k
C521 100p
NC
C522 100p
NC
C523 NC
C524 NC
C526
NC
C527
NC
C528 NC
C530 33p 50
C531
NC
C532 NC
C534
NC
C535
NC
C537 NC
C538
NC
R534
2.2k
R535
2.2k
R532
220
R533
220
C536
NC
DG
DG
DG
DG
G
D
G
D
DG
DG
DG
D500
NC
D501
NC
D530 NC
D531
NC
D515
NC
D516
NC
D517
NC
HSMIP
HSMIN
HSSPOUT
C585
NC
C586
NC
C587
NC
C588 NC
DG
VCCA33
DG
VCC33
L463
L464
L465
R564
330
C570
10u
6.3
C518 220p
C513
0.1u
50
C514
0.1u
50
R515
3.3k
R516
3.3k
R565
330
C569
10u
6.3
C540
0.1u
50
C541
0.1u
50
R530
3.3k
R531
3.3k
C525 3300p
C519
22u
6.3
C520
22u
6.3
DG
R574
NC
JK501
1
2
3
4
5
MIN
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