Panasonic KX-HT82480 / KX-HT82470 / KX-HT82460 Service Manual ▷ View online
13
KX-HT82480/82470/82460 Series
4.2.1.5.
Bell Signal Detection
During on-hook period, transmitting the bell signal to the AC loop in the CR series circuits detects the current by Photo Coupler, and
it determines the presence of a bell signal.
CPU board software performs the operation for recognition and determination of a pattern of bell signals.
it determines the presence of a bell signal.
CPU board software performs the operation for recognition and determination of a pattern of bell signals.
Bell loop path:
1. Ring
R902 PC900 C906 R906 Tip
2. Tip
R906 C906 PC901 R902 Ring
4.2.1.6.
End-Call Signal Detection
End call is detected by the photo coupler at part of making DC loop. PC900 (PC901) 4-pin is High level during a call.
On the other hand, at end-call, PC900(PC901) 4-pin changes from High to Low level.
PC100(PC901) 4-pin (BELLDET/REVDET) is connected to DSP GPIO, and CPU will monitor this signal via DSP and detects end
call.
On the other hand, at end-call, PC900(PC901) 4-pin changes from High to Low level.
PC100(PC901) 4-pin (BELLDET/REVDET) is connected to DSP GPIO, and CPU will monitor this signal via DSP and detects end
call.
+
-
+
-
+
-
REVDET[0]
DP[0]
*RL900A
NC
1
2
3
4
*D904A
NC
2
1
R930A
C926A
IC909A
3
2
1
R944A
D910A
+3.3V_DE56_2
C930A
C935A
C901A
+3.3V_DE56_2
VH1
DG
+3.3V_DE56_2
+3.3V_DE56_2
IC909A
5
6
7
R943A
PC900A
1
23
4
VH1
C904A
C924A
DG
R936A
C921A
C933A
DG
PC903A
1
2
3
4
R920A
C908A
+3.3V_DE56_2
*R901A
+3.3V_DE56_2
R946A
Q900A
C906A
*C905A
*C907A
D908A
3
1
2
4
DG
PC902A
1
3
4
6
*C912A
T900A
3
1
6
4
5
*D902A
*D906A
R981A
VH1
R980A
DG
C960A
*ZNR900A
*C937A
*R908A
*R932A
*C916A
*R938A
*C918A
*R954A
*C928A
*R906A
*R904A
*R948A
*R922A
*R916A
*R934A
*R940A
PC901A
1
2
3
4
*C910A
*Q904A
*R900A
R902A
22
R914A
R918A
R924A
R926A
R928A
680
R950A
R956A
REVDET
BELLDET
BELL DET
REVDET
+
-
+
-
+
-
REVDET[0]
DP[0]
*RL900A
NC
1
2
3
4
*D904A
NC
2
1
R930A
C926A
IC909A
3
2
1
R944A
D910A
+3.3V_DE56_2
C930A
C935A
C901A
+3.3V_DE56_2
VH1
DG
+3.3V_DE56_2
+3.3V_DE56_2
IC909A
5
6
7
R943A
PC900A
1
23
4
VH1
C904A
C924A
DG
R936A
C921A
C933A
DG
PC903A
1
2
3
4
R920A
C908A
+3.3V_DE56_2
*R901A
+3.3V_DE56_2
R946A
Q900A
C906A
*C905A
*C907A
D908A
3
1
2
4
DG
PC902A
1
3
4
6
*C912A
T900A
3
1
6
4
5
*D902A
*D906A
R981A
VH1
R980A
DG
C960A
*ZNR900A
*C937A
*R908A
*R932A
*C916A
*R938A
*C918A
*R954A
*C928A
*R906A
*R904A
*R948A
*R922A
*R916A
*R934A
*R940A
PC901A
1
2
3
4
*C910A
*Q904A
*R900A
R902A
22
R914A
R918A
R924A
R926A
R928A
680
R950A
R956A
REVDET
BELLDET
14
KX-HT82480/82470/82460 Series
4.2.1.7.
Polarity Reversal Detection
Configured by the photo couplers (PC900/901) that enable to detect each current in Tip
Ring, Ring Tip direction.
PC901 is used in common as the bell detection photo coupler. Using software, it stores the current direction (the detected photo
coupler) at acquiring line and recognizes the action by changing of the current direction (the detected photo coupler changes).
coupler) at acquiring line and recognizes the action by changing of the current direction (the detected photo coupler changes).
When the current flows in the direction of Ring to Tip, PC900 4-pin (BELLDET) is Low and PC901 4-pin (REVDET) is High.
1. Ring
R902 PC900 D908 Q900(C-E) Q904(C-E) R920 D904 Tip
When the current direction (polarity) is reversed from Tip to Ring, PC900 4-pin (BELLDET) is High and PC901 4-pin (REVDET)
turns to Low level. It recognizes the action by changing of the current direction (the detected photo cpupler changes).
turns to Low level. It recognizes the action by changing of the current direction (the detected photo cpupler changes).
2. Tip
D904 R920 Q904(C-E) Q900(C-E) D908 PC901 R901 Ring
4.2.1.8.
2W-4W Conversion
This circuit converts 4W-voice signal inside PBX and 2W-voice signal on SLT line side. It is configured by Op-Amp in HIC and BN
(Balance Network) in CODEC. It determines the return loss of voice and the frequency characteristic, and it can match with sorts of
impedance by changing the programs of CODEC.
(Balance Network) in CODEC. It determines the return loss of voice and the frequency characteristic, and it can match with sorts of
impedance by changing the programs of CODEC.
BELL DET
REV DET
+
-
+
-
+
-
REVDET[0]
DP[0]
*RL900A
NC
1
2
3
4
*D904A
NC
2
1
R930A
C926A
IC909A
3
2
1
R944A
D910A
+3.3V_DE56_2
C930A
C935A
C901A
+3.3V_DE56_2
VH1
DG
+3.3V_DE56_2
+3.3V_DE56_2
IC909A
5
6
7
R943A
PC900A
1
23
4
VH1
C904A
C924A
DG
R936A
C921A
C933A
DG
PC903A
1
2
3
4
R920A
C908A
+3.3V_DE56_2
*R901A
+3.3V_DE56_2
R946A
Q900A
C906A
*C905A
*C907A
D908A
3
1
2
4
DG
PC902A
1
3
4
6
*C912A
T900A
3
1
6
4
5
*D902A
*D906A
R981A
VH1
R980A
DG
C960A
*ZNR900A
*C937A
*R908A
*R932A
*C916A
*R938A
*C918A
*R954A
*C928A
*R906A
*R904A
*R948A
*R922A
*R916A
*R934A
*R940A
PC901A
1
2
3
4
*C910A
*Q904A
*R900A
R902A
22
R914A
R918A
R924A
R926A
R928A
680
R950A
R956A
REVDET
BELLDET
Pattern 1
BELL DET
REVDET
Pattern 2
OFF HOOK
REVERSE
OFF HOOK
REVERSE
+
-
+
-
SIGN6843
C926A
IC909A
3
2
1
R944A
C930A
C935A
VH1
DG
IC909A
5
6
7
R943A
VH1
C924A
IC909A
4
VEE
8
VCC
R936A
C921A
C933A
+15V
R946A
*C912A
T900A
3
1
6
4
5
R981A
VH1
R980A
DG
C960A
*C937A
*R932A
*C916A
*R938A
*C918A
*R954A
*C928A
*R948A
*R934A
*R940A
R950A
R956A
From DSP
To DSP
15
KX-HT82480/82470/82460 Series
4.2.1.9.
Surge Protection
4.2.1.10. CID Detection
CID signal is connected to DSP via AC coupling condensers (C942/C943) and detected by DSP.
Function
Specification
FSK Detection
Compliance Standards
ITU-T V.23 (1200bps)
Bell202 (1200bps)
Bell202 (1200bps)
Alart Signal Detection (2130/2750Hz Dual Tone)
DTMF Detection
(697/770/852/941Hz)/(1209/1336/1477/1633Hz)
Stutter Tone Detection 315 - 640Hz (for USA only)
C901A
FG
AL900A
SFG
SFG
R901
D912A
2
1
D911A
2
1
D901A
12
D900A
12
S1
1
2
S2
1
2
*CF900A
+
-
+
-
-
+
-
SIGN6843
REVDET[0]
SIGN7069
DP[0]
BELL[0]
*RL900A
1
2
3
4
C913
*D904A
2
1
R930A
C926A
IC909A
3
2
1
R944A
D910A
+3.3V_DE56_2
C930A
C942A
C935A
C901A
R961B
+3.3V_DE56_2
C908
VH1
R962B
R967A
C912
DG
+3.3V_DE56_2
C950A
DG
C958B
DG
+3.3V_DE56_2
IC909A
5
6
7
DG
R943A
DG
C943B
R909
PC900A
1
23
4
VH1
DG
C904A
C924A
C950B
DG
IC909A
4
VEE
8
VCC
C943A
R911
1
2
3
45
6
7
8
R936A
+3.3V_DE56_1
DG
C921A
C933A
2
1
DG
+15V
DG
DG
+3.3V_
DE56_1
DG
R962A
DG
DG
VH2
C942B
DG
DG
DG
PC903A
1
2
3
4
R920A
DG
C908A
C958A
+3.3V_DE56_2
*R901A
R961A
C952B
+3.3V_DE56_2
R946A
C952A
Q900A
79
S
CL/UCFG1
80
S
DA/UCFG2
81
T
XD/UCFG3
82
3/RXD/CLKE
83
1/SYNCWIN
84
GND5
85
DCIN3/PDN
86
D
CIN1/IBAT
87
VREF
88
MIP
89
MIN
90
C
IN2/MPWR
91
LIN1
92
GNDA
93
HSMIN
94
HSMIP
95
VCCA
96
LIN0
97
LOUT0
76
CAN_OUT3
77
C
A0/BANK0
78
W
M1/BANK2
98
H
SSPOUTP
99
VCCPA
100
SPOUTN
C906A
*C905A
*C907A
D908A
3
1
2
4
TP 13.824MHz
DG
PC902A
1
3
4
6
*C912A
T900A
3
1
6
4
5
*D902A
*D906A
R976B
R977A
R976A
R977B
R981A
VH1
R980A
DG
C960A
*ZNR900A
*C937A
*R908A
*R932A
*C916A
*R938A
*C918A
*R954A
*C928A
*R906A
*R904A
*R948A
C910
*R922A
*R916A
*R934A
*R940A
PC901A
1
2
3
4
C946A
C947A
C946B
C947B
R970A
R971A
R970B
R971B
*C910A
*Q904A
*R900A
R902A
R914A
R918A
R924A
R926A
R928A
R966A
R966B
R967B
R974A
R974B
R975A
R975B
R908
R910
R913
R914
R915
R916
R950A
R956A
Place on solder side
CID Detection
16
KX-HT82480/82470/82460 Series
4.2.2.
SLC8 Block
SLC8 block is responsible for supporting up to 8 ports Standard Telephone Line interface with Caller ID funcion.
This circuit has line inteface front end and SLIC device which is controlled by CPU via SPI-BUS.
This circuit has line inteface front end and SLIC device which is controlled by CPU via SPI-BUS.
4.2.2.1.
PLD
A PLD (Programable Logic device) is equipped on KX-HT82470 (SLC8 Option Card), and this device has several interfacing func-
tions as below.
tions as below.
4.2.2.2.
CODEC Function
Integrated SLIC device is installed on board. The analogue features such as BN, frequency characteristic, volume level, sidetone
are configured via SPI interface SCLK, DOUT, DIN, CS_SPI signals. Also, it converts A/D to D/A, and 4-line-analogue signal to
PCM code in G.711 format.
are configured via SPI interface SCLK, DOUT, DIN, CS_SPI signals. Also, it converts A/D to D/A, and 4-line-analogue signal to
PCM code in G.711 format.
Function
Specification
SLIC
Number of Support Channel
2ch/device
Number of Devices
4
CPU Interface
Interface
SPI-BUS
Bus Clock
4.096MHz
Device Select Logic
DEV_SEL[2:0]
Interrupt Control
SLIC Interrupt
Up to 4
TDM Interface
TDM TS
16bit x 32TS
TDM Clock
4.096MHz
Clock Slave
Clock Slave
TDM -IF
CPLD
DuSLIC#1
FXS Interface Analog Circuit
FXS Interface Analog Circuit
RJ11
JK700 - A
JK700 - A
RJ11
JK700 - B
JK700 - B
DuSLIC#2
FXS Interface Analog Circuit
FXS Interface Analog Circuit
RJ11
JK700 - C
JK700 - C
RJ11
JK700 - D
JK700 - D
DuSLIC#3
FXS Interface Analog Circuit
FXS Interface Analog Circuit
RJ11
JK700 - E
JK700 - E
RJ11
JK700 - F
JK700 - F
DuSLIC#4
FXS Interface Analog Circuit
FXS Interface Analog Circuit
RJ11
JK700 - G
JK700 - G
RJ11
JK700 - H
JK700 - H
SPI-IF
TDM -IF
SPI-IF
SPI-IF
TDM -IF
SPI-IF
TDM -IF
SPI-IF
SPI-IF
SPI
-I
F
TDM
-I
F
Control(Reset/
Int)
nRESET_OUT
SPI -IF
TDM -IF
Option SLC8 Card
C730A
R711A
R714A
+3.3V_SLIC
DG
R719A
4.7k
DHW1
R718A
DG
DG
DG
C723A
C719A
nINT_IN0
DOUT0
nRESET_OUT0
DG
DG
SCLK0
CS_SPI00
R717A
DIN0
+1.5V
DG
C733A
C746A
C745A
IC700A
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
76
76
77
77
78
78
79
79
80
80
81
81
82
82
83
83
84
84
1
1
2
2
12
12
13
13
14
14
23
23
24
24
34
34
35
35
36
36
45
45
46
46
56
56
57
57
58
58
74
74
75
75
85
85
86
86
87
87
15
15
37
37
59
59
88
88
89
89
16
16
17
17
18
18
19
19
20
20
21
21
22
22
38
38
39
39
40
40
41
41
42
42
43
43
44
44
60
60
61
61
62
62
63
63
64
64
65
65
66
66
67
67
68
68
69
69
70
70
71
71
72
72
73
73
SPI Interface
SP
I Interface
Click on the first or last page to see other KX-HT82480 / KX-HT82470 / KX-HT82460 service manuals if exist.