Read Panasonic KX-TDA100DUP (serv.man3) Service Manual Supplement online
10
KX-TDA100DUP
1.4.2.7.
Hook Detection
The SLIC/CODEC(IC300A-W) provides a programmable off-hook detection mechanism.
The off-hook detection scheme provides two unique thresholds to allow hysteresis, and also includes a programmable debounce fil-
ter to eliminate false detection.
The off-hook detection scheme provides two unique thresholds to allow hysteresis, and also includes a programmable debounce fil-
ter to eliminate false detection.
1.4.2.8.
Ring Trip Feature
During ringing, the ring current is permanently sensed by the SLIC/CODEC(IC300A-W).
When the handset of a ringing telephone is picked up, the current is compared against the programmed ring trip threshold.
If it is above the programmed ring trip threshold, the ringing signal automatically stop and move to the off-hook status.
When the handset of a ringing telephone is picked up, the current is compared against the programmed ring trip threshold.
If it is above the programmed ring trip threshold, the ringing signal automatically stop and move to the off-hook status.
1.4.2.9.
Surge Protection
Thyristor is installed between T or R and FG protect from extraneous surge.
TA
RA
DG
CLK
FH
UHW
DHW
nC_CS0
DIN[0]
DCLK[0]
DOUT[0]
+3.3V
+3.3V
C316A
DG
C300A
C313A
C317A
DG
CN201
2
DIAG_T
RL201A
NC
6
7
5
CN201
3
DIAG_R
RL201A
3
2
4
C313B
DG
C302A
C303A
C302B
C303B
C318A
R300A
R320A
VBATa
J300A
DG
DG
+40V
R310A
J301A
R308A
R309A
R308B
R309B
D305A
C304A
DG
D304A
FG
C305A
C321A
C310A
R315A
R316A
C309A
L300A
DG
DG
R314A
D301A
1
2
C308A
L301A
+40V
DG
Q300A
S
1 2 3
G
4
D
5 6 7 8
J699
Q301A
S
D
G
CN200
26
1
C307A
IC300A
TIPa
1
N/C2 2
SRINGDCa
5
SRINGACa
6
STIPACa
7
STIPDCa
8
SVBATa
11
SVDC 12
FSYNC 15
SDITHRU 16
PCLK 17
DTX 18
DRX 19
SDCHa
20
SDCLa
21
DCDRVa
22
DCFFa
23
DCFFb
24
VDDD 28
VDDREG
29
CSB 30
SCLK 31
SDO 32
SDI 33
STIPDCb
38
STIPACb
39
SRINGACb
40
SRINGDCb
41
VDDA 44
N/C49 49
N/C56 56
RINGa
59
R321A
R319A
R318A
R313A
R306A
R306B
R307A
R307B
RL200A
9
10
8
RL200A
4
3
5
R317A
R260A
R261A
A
To ASIC
To PLD
m
b
m
b
b
m
m
b
SDCL
SDCH
DCDRV
TIP
RING
On-hook
Off-hook
TA
RA
DG
CLK
FH
UHW
DHW
nC_CS0
DIN[0]
DCLK[0]
DOUT[0]
+3.3V
+3.3V
C316A
DG
C300A
C313A
C317A
DG
CN201
2
DIAG_T
RL201A
NC
6
7
5
CN201
3
DIAG_R
RL201A
3
2
4
C313B
DG
C302A
C303A
C302B
C303B
C318A
R300A
R320A
VBATa
J300A
DG
DG
+40V
R310A
J301A
R308A
R309A
R308B
R309B
D305A
C304A
DG
D304A
FG
C305A
C321A
C310A
R315A
R316A
C309A
L300A
DG
DG
R314A
D301A
1
2
C308A
L301A
+40V
DG
Q300A
S
1 2 3
G
4
D
5 6 7 8
J699
Q301A
S
D
G
CN200
26
1
C307A
IC300A
TIPa
1
N/C2 2
SRINGDCa
5
SRINGACa
6
STIPACa
7
STIPDCa
8
SVBATa
11
SVDC 12
FSYNC 15
SDITHRU 16
PCLK 17
DTX 18
DRX 19
SDCHa
20
SDCLa
21
DCDRVa
22
DCFFa
23
DCFFb
24
VDDD 28
VDDREG
29
CSB 30
SCLK 31
SDO 32
SDI 33
STIPDCb
38
STIPACb
39
SRINGACb
40
SRINGDCb
41
VDDA 44
N/C49 49
N/C56 56
RINGa
59
R321A
R319A
R318A
R313A
R306A
R306B
R307A
R307B
RL200A
9
10
8
RL200A
4
3
5
R317A
R260A
R261A
A
To ASIC
To PLD
m
b
m
b
b
m
m
b
SDCL
SDCH
DCDRV
TIP
RING
Ringing
Off-hook
TA
RA
CN201
2
DIAG_T
RL201A
6
7
5
CN201
3
DIAG_R
RL201A
3
2
4
C302A
C303A
J300A
DG
DG
R308A
R309A
D305A
C304A
DG
D304A
FG
C305A
C321A
CN200
26
1
IC300A
TIPa
1
SRINGDCa
5
SRINGACa
6
STIPACa
7
STIPDCa
8
SDCHa
20
SDCLa
21
DCDRVa
22
RINGa
59
R319A
R318A
R306A
R307A
RL200A
9
10
8
RL200A
4
3
5
R260A
R261A
m
b
m
b
b
m
m
b
Click on the first or last page to see other KX-TDA100DUP (serv.man3) service manuals if exist.