Panasonic KX-TS2350CAB User manual

© 2006 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TS2350CAB
KX-TS2350CAC
KX-TS2350CAH
KX-TS2350CAR
KX-TS2350CAW
Integrated Telephone System
Black Version
Blue Version
Gray Version
Red Version
White Version
(for Kazakhstan)
(for Uzbekistan)
Telephone Equipment
ORDER NO. KM40608170CE

1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 3
1.1. Suggested PbF Solder 3
1.2. How to Recognize that Pb Free Solder is Used 4
2 FOR SERVICE TECHNICIANS 5
3 OPERATING INSTRUCTIONS 6
3.1. Location of Controls 6
3.2. Connection 6
3.3. Troubleshooting 6
4 DISASSEMBLY INSTRUCTIONS 7
5 TROUBLESHOOTING GUIDE 8
5.1. Service Hints 8
5.2. Pulse Dialing Problems 8
5.3. Problems With the Handset 9
5.4. Tone Dialing Problems 9
5.5. Problems With Ringer 10
5.6. How to Check IC1 (Scanning to the key) 11
6 BLOCK DIAGRAM 12
7 CIRCUIT OPERATIONS 13
7.1. Telephone Line Interface and Pulse Dial Circuit 13
7.2. Tone Dial Circuit 13
7.3. Power Circuit and Redial Back-up Circuit 14
8 OPTION JUMPER TABLE 15
9 CPU DATA 16
10 CABINET AND ELECTRICAL PARTS LOCATION 17
11 ACCESSORY AND PACKING MATERIALS 18
12 TERMINAL GUIDE OF ICs TRANSISTORS AND DIODES 19
13 REPLACEMENT PARTS LIST 20
13.1. Base Unit 20
13.2. Accessories and Packing Materials 21
14 FOR SCHEMATIC DIAGRAM (SCHEMATIC DIAGRAM) 23
15 SCHEMATIC DIAGRAM 24
16 CIRCUIT BOARD 27
16.1. Main (Component View) 27
16.2. Main (Flow Solder Side View) 28
16.3. Operation (Flow Solder Side View) 29
Note:
Because section 3 of this manual is an extract from the operating instructions for this model, it is subject to change without notice.
You can download and refer to the original operating instructions on TSN Server for further information.
CONTENTS
Page Page
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

1 ABOUT LEAD FREE SOLDER (PbF: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that
contains lead.
We will use PbF Solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder.
Caution
• • •
• PbF solder has a melting point that is 50°F ~70°F (30°C ~ 40°C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700°F ± 20°F (370°C ± 10°C).
• • •
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• • •
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F (600°C).
• • •
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See the figure below).
1.1. Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the
manufacturer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

1.2. How to Recognize that Pb Free Solder is Used
(Example: Main P.C.B.)
IC2
13
1
14
85
IC1 28
CN1
123456789101112
PbF
Marked
(Component View)
Note:
The location of the “PbF”mark is subject to change without notice.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

2 FOR SERVICE TECHNICIANS
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1.Cover the plastic parts boxes with aluminum foil.
2.Ground the soldering irons.
3.Use a conductive mat on the worktable.
4.Do not touch IC or LSI pins with bare fingers.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

3 OPERATING INSTRUCTIONS
3.1. Location of Controls
3.2. Connection
3.3. Troubleshooting
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

4 DISASSEMBLY INSTRUCTIONS
Shown in Fig —.To remove —.Remove —.
1Cabinet Cover Screws (2.6 ×10).............. (A) ×5
2P.C. Boards Remove the P.C.Boards
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

5 TROUBLESHOOTING GUIDE
5.1. Service Hints
SYMPTOM CURE
No Tone Dialing Check IC1, Q2, Q1, C22 and VR1.
Dead Check IC1, Q2, Q1 and D17.
Rings, no dial tone, no pulse or tone dial Check Q1, Q2, D17, Q3 and IC1.
No rings Check C1, R2 and IC2.
No volume Handset Check IC1, VR1, C15 and C22.
Buttons stick under upper cabinet assembly. From key board Adjust the setting of buttons.
No pulse dial Check Q1, Q2 and IC1.
5.2. Pulse Dialing Problems
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

5.3. Problems With the Handset
5.4. Tone Dialing Problems
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

5.5. Problems With Ringer
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

5.6. How to Check IC1 (Scanning to the key)
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

6 BLOCK DIAGRAM
MELODY
SEQUENCER
LINE ADAPTATION
POWER EXTRACTION
DC MASK
CONTROL
LOGIC
TONE
GENERATOR
RING
FREQUENCY
DISCRIMINATION OSC
RAM MUTE
DIALLER
LINE
CURRENT
SENSE
SOFT CLIP
AGC
VDD
LI CI LS RI STB AGND LED
VDD
VSS MO FCI
HS/DP LLC OSC MFL MODE C1 C2 C3 C4
R1 R2 R3 R4
M2 M1
RO
CS
IC1
KEY PAD
R9
sv1
AGND
3.58 ADL
RS
R
T
Q1
Q2
D23
R55
R103
S3
L H OFF
D24
R14
IC2
R2
C1
Q8
Q3
R
inger
D2 C34
D17
C22
HS Speaker
HS MIC
R10 C5
C9
R5 R6
KX-TS2350 BLOCK DIAGRAM
R102
58
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW
12

7 CIRCUIT OPERATIONS
7.1. Telephone Line Interface and Pulse Dial Circuit
When the hook switch SW1 is ON (off-hook), the circuit is closed, and current is supplied to the base of Q2 via the diode bridge
D17 and Q2 is On →Q1 is ON (OFF-HOOK condition).
Q1 and Q2 are the dial pulse generating circuits, and are driven by the DIALER (IC1), when the DIALER Pin 10 of IC1 is LOW →
Q2 is OFF and Q1 is OFF (break). If port Pin 10 is HIGH →Q2 is ON →Q1 is ON (make).
7.2. Tone Dial Circuit
Function:
The tone dialing circuit consists of a DTMF (Dual Tone Multi Frequency) signal generator (outputted from Pin 25 of the IC1) for
tone dialing, and also a circuit for outputting the signal to line.
The DTMF circuit identifies inputs from the 12 keys (1, 2, 3, 4, 5, 6, 7, 8, 9, 0, and #) by means of a total of seven frequencies,
that is four low frequencies (Low group) and three high frequencies (High group).
Circuit Description:
When a dial key is pressed, a DTMF signal is output from Pin 25 of IC1 as an analog synthetic wave.
The signal flow to the line is as follows.
Pin25ofIC1→Q3 →R9 →Q1 →Tel Line.
The DTMF signal is sent to the line via the following path. Q3 is an amplifier which is used to output the signal to line.
Shown below is the signal flow used to output the DTMF signal from the handset as a monitor tone when a dial key is pressed.
Pin 3 of IC1 →VR1 →C15 →Handset Speaker.
The signal combination and frequency corresponding to each dial key is shown on the next page.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

7.3. Power Circuit and Redial Back-up Circuit
Function:
This set is powered from the line. When it is an OFF-HOOK status, Tel Line →D17 →Q1 →R9 →Pin 27 of IC1 (to become
the power supply for IC1 speech network).
The voltage from the line is turned into a constant voltage by D2 and then supplied to the IC1, reset circuit.
Through Tel Line →R1 →R3 →D17 →R14 to become the power supply for IC1, and the redial Back-up will be done.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

8 OPTION JUMPER TABLE
Note:
Refer to Main (Flow Solder Side View) (P.28)
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

9 CPU DATA
(IC1)
Clock frequency: 3.58MHz
Operating range: 13~100mA
1VSS 28
LS 1
MFL 2
RO 3
VDD 4
AGND 5
STB 6
CI 7
MO 8
LLC 9
VSS VSS
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
VSS 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
17
18
19
20
21
22
23
24
25
VSS V
SS
EMC ground connection
26
27
28
C2
C1
R4
R3
R2
R1
FCI
LED
M1
M2
CS
V
SS
LI
RI
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.
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.
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.
This input is used for power extraction and line current sending.
This is the input for the receive signal.
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

10 CABINET AND ELECTRICAL PARTS LOCATION
17
KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

11 ACCESSORY AND PACKING MATERIALS
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

12 TERMINAL GUIDE OF ICs TRANSISTORS AND DIODES
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW

1.RTL (Retention Time Limited)
Note:
The marking (RTL) indicates that the Retention Time is
limited for this item.
After the discontinuation of this assembly in production,
the item will continue to be available for a specific period
of time. The retention period of availability is dependant
on the type of assembly, and in accordance with the
laws governing part and product retention. After the end
of this period, the assembly will no longer be available.
2.Important safety notice
Components identified by the mark indicates special
characteristics important for safety. When replacing any of
these components, only use specified manufacture’s parts.
3.The S mark means the part is one of some identical parts.
For that reason, it may be different from the installed part.
4.ISO code (Example: ABS-94HB) of the remarks column
shows quality of the material and a flame resisting grade
about plastics.
5.RESISTORS & CAPACITORS
Unless otherwise specified;
All resistors are in ohms (Ω) K=1000Ω, M=1000kΩ
All capacitors are in MICRO FARADS (µF)P=µµF
*Type & Wattage of Resistor
13.1. Base Unit
13.1.1. Cabinet and Electrical Parts
Ref.
No.
Part No. Part Name & Description Remarks
1PQBH10033Z2 BUTTON, HOOK (for KX-
TS2350CAB)
ABS-HB
1PQBH10033Z8 BUTTON, HOOK (for KX-
TS2350CAC)
ABS-HB
1PQBH10033Z9 BUTTON, HOOK (for KX-
TS2350CAH)
ABS-HB
1PQBH10033Z3 BUTTON, HOOK (for KX-
TS2350CAR)
ABS-HB
1PQBH10033Z1 BUTTON, HOOK (for KX-
TS2350CAW)
ABS-HB
2PQKM10610Z2 CABINET BODY (for KX-
TS2350CAB)
PS-HB
Ref.
No.
Part No. Part Name & Description Remarks
2PQKM10610Z4 CABINET BODY (for KX-
TS2350CAC)
PS-HB
2PQKM10610Z5 CABINET BODY (for KX-
TS2350CAH)
PS-HB
2PQKM10610Z3 CABINET BODY (for KX-
TS2350CAR)
PS-HB
2PQKM10610Z1 CABINET BODY (for KX-
TS2350CAW)
PS-HB
3L0DDFD000002 BUZZER
4PQSX10248Y KEYBOARD SWITCH, 16 KEY (for
KX-TS2350CAB/CAC/CAR)
4PQSX10248X KEYBOARD SWITCH, 16 KEY (for
KX-TS2350CAH)
4PQSX10248Z KEYBOARD SWITCH, 16 KEY (for
KX-TS2350CAW)
5PQKF10600X2 CABINET COVER (for KX-
TS2350CAB)
PS-HB
5PQKF10600X4 CABINET COVER (for KX-
TS2350CAC)
PS-HB
5PQKF10600X3 CABINET COVER (for KX-
TS2350CAH)
PS-HB
5PQKF10600X5 CABINET COVER (for KX-
TS2350CAR)
PS-HB
5PQKF10600X1 CABINET COVER (for KX-
TS2350CAW)
PS-HB
6PQHA10018Y RUBBER PARTS, FOOT CUSHION
7PQKL10058Z2 STAND, WALL MOUNT (for KX-
TS2350CAB)
PS-HB
7PQKL10058Z4 STAND, WALL MOUNT (for KX-
TS2350CAC)
PS-HB
7PQKL10058Z5 STAND, WALL MOUNT (for KX-
TS2350CAH)
PS-HB
7PQKL10058Z3 STAND, WALL MOUNT (for KX-
TS2350CAR)
PS-HB
7PQKL10058Z1 STAND, WALL MOUNT (for KX-
TS2350CAW)
PS-HB
8PQHA10025Z RUBBER PARTS, FOOT CUSHION
9PQGT19126Z NAME PLATE (for KX-TS2350CAB)
9PQGT19309Z NAME PLATE (for KX-TS2350CAC)
9PQGT19311Z NAME PLATE (for KX-TS2350CAH)
9PQGT19310Z NAME PLATE (for KX-TS2350CAR)
9PQGT19125Z NAME PLATE (for KX-TS2350CAW)
13.1.2. Main P.C.Board Parts
Ref.
No.
Part No. Part Name & Description Remarks
PCB1 PQWP1S2350CA MAIN P.C.BOARD ASS´Y (RTL)
(ICs)
IC1 N5BCBZ000001 IC
IC2 C1CA00000290 IC
(TRANSISTORS)
Q1 B1ACGP000007 TRANSISTOR(SI)
Q2 PQVT2N6517CA TRANSISTOR(SI) S
Q3 PQVTKSB564AC TRANSISTOR(SI) S
Q7 PQVT2N6517CA TRANSISTOR(SI) S
Q8 B1CEGF000004 TRANSISTOR(SI)
(DIODES)
D2 MA4051 DIODE(SI) S
D8 B0EAAD000001 DIODE(SI)
D9 B0EAAD000001 DIODE(SI)
D13 MA4100 DIODE(SI) S
D17 B0EDER000009 DIODE(SI)
D23 B0EAAD000001 DIODE(SI)
D24 B0EAAD000001 DIODE(SI)
(JACKS AND CONNECTOR)
JACK1 PQJJ1T029Z JACK, MODULAR
JACK3 PQJJ1T030Z JACK, HANDSET
CN1 WBX10SS4AALM CONNECTOR S
(SWITCHES)
S1 PQSH2B105Z PUSH SWITCH, HOOK S
S2 K0D112B00131 SLIDE SWITCH S
S3 K0D113B00082 SLIDE SWITCH
(RESISTORS)
13 REPLACEMENT PARTS LIST
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KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW