Read Panasonic KX-DT521RU Service Manual Supplement 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
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