Panasonic KX-NS0290CE Service Manual ▷ View online
13
KX-NS0290CE
4.3.1.9.
EXT-CID Transmission
14
KX-NS0290CE
4.4.
Outline of Reset System
A reset to devices(IC501 and IC602) in this card is dominant in a reset from the main frame (MPR), and normally it is only available
for software command reset or hardware reset using RESET IC(IC801).
Shows the reset schematic diagram.
for software command reset or hardware reset using RESET IC(IC801).
Shows the reset schematic diagram.
4.5.
Power Supply
This card is supplied +15V power through the SMT connector (CN3) from the power supply unit.
The +15V power supply generates +3.3V via DC/DC converter, and they are fed as the power of circuit in the card.
Shows the system diagram of the power supply.
The +15V power supply generates +3.3V via DC/DC converter, and they are fed as the power of circuit in the card.
Shows the system diagram of the power supply.
• Protection of 3.3V output
The protection circuit consists of an output short protection and an overvoltage protection.
When an output of power supply is short, IC807 works to stop the output as the output short protection.
When +3.3V output become overvoltage caused by IC807 short (5-6pin), it is detected by D804.
When an output of power supply is short, IC807 works to stop the output as the output short protection.
When +3.3V output become overvoltage caused by IC807 short (5-6pin), it is detected by D804.
Q802
G
D
S
R804
47k
R807
33k
+15V
C802
D804
PGD
R803
2.2k
R805
1k
R810
10k
R801
47k
R802
10k
IC807
1
BST
2
GND
3
FB
4
EN
5
IN
6
SW
C818
0.01u
50
D805
R823
49.9k
R824
16.2k
C811
10u
6.3
C810
10u
6.3
C807
150u
25
C805
10u
25
C816
0.01u
50
C819
15p
50
+15V
D801
D802
Q801
1
2
3
4
5
6
+15V_F
L803
10u
L802
10u
F801
125V
3
R832
NC
C812
0.1u
50
NC
C806
0.1u
50
C817
0.1u
50
R822
100k
R835
5.6
C820
330p
15
KX-NS0290CE
• +80V/-55V Converter
Circuit configuration of -55V converter is same as +80V.
In event of an over current in the 15V input line, due to a short circuit in the MOSFET Q704/Q705 switches, power supply is shut
down.
In event of an over current in the 15V input line, due to a short circuit in the MOSFET Q704/Q705 switches, power supply is shut
down.
4.6.
Local Highway Interface
Packs 2.048, 4.096, 8.192 MHz highway (Max.64 timeslot). (voice communication bus in the circuit board)
The PCM data of arbitrary streams 0-15 (128 timeslot / 1 stream) on the CT bus can switch to the arbitrary local highway (64
timeslot) by the local TSW.
The timeslot configuration example of the local highway is shown below.
The PCM data of arbitrary streams 0-15 (128 timeslot / 1 stream) on the CT bus can switch to the arbitrary local highway (64
timeslot) by the local TSW.
The timeslot configuration example of the local highway is shown below.
TS No.
PCM data
TS No.
PCM data
96
PRI30/BRI/LCOT#1
112
PRI23#16/PRI30#16
97
PRI23#1/PRI30/BRI/LCOT#2
113
PRI23#17/PRI30#17
98
PRI23#2/PRI30/BRI/(LCOT)#3
114
PRI23#18/PRI30#18
99
PRI23#3/PRI30/BRI/(LCOT)#4
115
PRI23#19/PRI30#19
100
PRI23#4/PRI30/BRI/(LCOT)#5
116
PRI23#20/PRI30#20
101
PRI23#5/PRI30/BRI/(LCOT)#6
117
PRI23#21/PRI30#21
102
PRI23#6/PRI30/BRI/(LCOT)#7
118
PRI23#22/PRI30#22
103
PRI23#7/PRI30/BRI/(LCOT)#8
119
PRI23#23/PRI30#23
104
PRI23#8/PRI30#9
120
PRI23#24/PRI30#24
105
PRI23#9/PRI30#10
121
PRI30#25
106
PRI23#10/PRI30#11
122
PRI30#26
107
PRI23#11/PRI30#12
123
PRI30#27
108
PRI23#12/PRI30#13
124
PRI30#28
109
PRI23#13/PRI30#14
125
PRI30#29
110
PRI23#14/PRI30#15
126
PRI30#30
111
PRI23#15
127
FAX#0
16
KX-NS0290CE
5 Location of Controls and Components
5.1.
Names and Locations
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