Panasonic KX-TS2350RUJ / KX-TS2350RUS / KX-TS2350RUT Service Manual ▷ View online
21
KX-TS2350RUJ/KX-TS2350RUS/KX-TS2350RUT
12 Printed Circuit Board
12.1. Circuit Board (Main)
12.1.1. Component View
D16
3
1
6
2
5
4
POS1
R7
R53
JJ2
JJ7
BLACK
RED
GREEN
YELLOW
C6
C20
R46
JJ6
C38
JACK1
D15
C9
L3
JP1
1
JP12
JP13
C22
C34
Q7
Q8
Q2
E C B
E C B
E C B
G D S
E C B
Q3
Q1
JJ3
JJ4
JJ5
JP29
IC2
JP3
R9
1432
D13
D24
D22
FL
T2
R2
FL
T1
1
3
S1
S2
41
S3
D8
C29
C1
1
VR1
VR2
JACK3
C15
C26
D9
PQUP1
1224Y
D10
D1
1
1
14
85
C102
IC1
28
C1
YELLOW
GREEN
JP27
JJ8
JJ1
JJ9
CN1
12
3
4
5
6
7
8
9
1
0
1
1
1
2
X1
SA1
C16
C17
D23
D2
PbF
KX-TS2350 CIRCUIT BOARD (Main) Component View
*
B
22
KX-TS2350RUJ/KX-TS2350RUS/KX-TS2350RUT
12.1.2. Flow Solder Side View
*: Refer to Option Jumper Table (P.16)
KX-TS2350 CIRCUIT BOARD (Main) Flow Solder Side View
{
{
{
{
R25
R19
R5
R6
C5
R31
C5
R31
R14
R54
R55
R4
R101
R102
R104
R103
R104
R103
R105
R28
RI+
R18
R8
TP1
TP6
R22
R23
C31
R52
R24
JP19
JP18
JP17
JP17
JP14
JP23
JP15
JP16
JP15
JP16
JP24
JP20
JP21
JP22
JP21
JP22
JP25
R37
R32
R32
R43
R38
R26
R26
RING
R3
R1
R47
JP26
JP28
JP28
R29
R20
C27
C13
C19
C12
C27
C13
C19
C12
C18
C23
R51
R21
C24
C103
C21
S
P+
SP
-
SP-
MC
-
12
3
9
1
28
25
R10
R106
VSS
FL
T1
15
A
5
1
1
4
8
5
SP
+
M
C-
MC
+
MC
+
C30
C3
G
Y
TP4
TIP
TP3
TP5
D17
TP2
FL
T2
VDD
BLA
CK
RI-
RED
1
1
3
4
RINGER1
for PULSE*
for
T
ONE*
for Ringer
for Flash*
PbF
23
KX-TS2350RUJ/KX-TS2350RUS/KX-TS2350RUT
12.2. Circuit Board (Operation)
12.2.1. Flow Solder Side View
1
1
2
3
10
4
CN1
V+
V-
FLASH
REDIAL
PbF
5
6
7
8
9
0
#
KX-TS2350 CIRCUIT BOARD (Operation) Flow Solder Side View
24
KX-TS2350RUJ/KX-TS2350RUS/KX-TS2350RUT
13 Appendix Information of Schematic Diagram
13.1. CPU Data
IC1: N5BCBZ000003
Clock frequency: 3.58 MHz
Operating range: 13~100 mA
Clock frequency: 3.58 MHz
Operating range: 13~100 mA
1
VSS
28
LS 1
MFL 2
R
O
3
V
DD
4
A
GND
5
STB 6
CI 7
MO 8
LLC 9
V
SS
V
SS
HS/DP 10
OSC 11
MODE 12
C4 13
C3 14
C2 15
C1 16
R4 17
R3 18
R2 19
R1 20
FCI 21
LED 22
M1 23
M2 24
CS 25
V
SS
26
LI 27
RI 28
U4
U5
C1
C2 C3
C5 C4
C6
Pin
No.
Symbol
Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LS
MFL
RO
V
DD
A
GND
STB
CI
MO
LLC
HS/DP
OSC
MODE
C4
C3
Line Current Sense Input
MF Level Setting
Receive Output
Positive Voltage Supply
Analogue Ground
Side Tone Balance Input
Complex Impedance Pin
Melody Output
Line Loss Compensation
Hook Switch Input and Dial Pulse Output
Oscillator Input
Signalling Mode Select Input
Keyboard Column
Keyboard Column
15
16
16
17
18
19
20
21
22
23
24
25
VSS
V
SS
EMC ground connection
26
27
28
C2
C1
C1
R4
R3
R2
R1
FCI
LED
M1
M2
CS
V
SS
LI
RI
Keyboard Column
Keyboard Column
Keyboard Column
Keyboard Row
Keyboard Row
Keyboard Row
Keyboard Row
Frequency Comparator Input
LED Output Driver
Microphone Input
Microphone Input
Current Shunt Control Output
Negative Power Supply
Line Input
Receive Input
Description
This is the input for sending the line current.
A voltage divider connected from this pin to A GND and VSS can be used to set the DTMF level.
This is the output for driving a dynamic earpiece with an impedance of 140 to 300
This is the supply pin for the circuit.
This is the analog(ue) ground for the amplifiers.
This is the input for side tone cancellation.
For complex impedance a capacitor should be connected to this pin.
PDM output of the melody generator for tone ringing. Hi-Z when not active.
Select pin for line loss compensation.
LLC = AGND: 20-50 mA LLC = VDD: 45-75 mA LLC = VSS: none.
LLC = AGND: 20-50 mA LLC = VDD: 45-75 mA LLC = VSS: none.
This is an I/O that is pulled high by the hook switch when off-hook and an open
drain pulls it low during break periods of pulse dialing and flash.
drain pulls it low during break periods of pulse dialing and flash.
Pin for ceramic resonator (3.58 MHz).
Row 6 MF only, 82/82 ms
Mode pin
Function
Row 2
mode, 10 pps, 40/60 ms
During temporary MF : 82/160 ms
(see key arrangement in Schematic Diagram) the scanning to the key.
(see key arrangement in Schematic Diagram) the scanning to the key.
This is a Schmitt trigger input for ring frequency discrimination. Disabled during off-hook.
Output for driving an LED that will be flashing when in Programme.
Differential inputs for the microphone (electric).
This N-channel open drain output controls the external high power shunt transistor
for the modulation of the line voltage and for shorting the line during make period
of pulse dialing.
for the modulation of the line voltage and for shorting the line during make period
of pulse dialing.
This input is used for power extraction and line current sending.
This is the input for the receive signal.
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