Panasonic KX-TS2388RUB Manual de usuario

Unauthorized copying and distribution is a violation

of law.

ORDER NO. KM41010283CE

Telephone Equipment

Model No. KX-TS2388RUB

KX-TS2388RUW

KX-TS2388CAB

KX-TS2388CAW

KX-TS2388UAB

KX-TS2388UAW

Integrated Telephone System

B: Black Version

W: White Version

(for Russia, Central Asia and Ukraine)

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general

public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting

to service a product. Products powered by electricity should be serviced or repaired only by experienced professional

technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone

else could result in serious injury or death.

IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by

in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that

these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.

Do not modify the original design without permission of manufacturer.

IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING

If lead free solder was used in the manufacture of this product, the printed circuit boards will be marked PbF.

Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.

When this mark does appear, please read and follow the special instructions described in this manual on the

use of PbF and how it might be permissible to use Pb solder during service and repair work.

LWhen you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.

LThe illustrations in this Service Manual may vary slightly from the actual product.

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

TABLE OF CONTENTS

PAGE PAGE

1 Safety Precautions----------------------------------------------- 4

1.1. For Service Technicians --------------------------------- 4

2 Warning -------------------------------------------------------------- 4

2.1. Battery Caution--------------------------------------------- 4

2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4

2.3. Discarding of P. C. Board-------------------------------- 5

3 Specifications ----------------------------------------------------- 6

4 Technical Descriptions ----------------------------------------- 7

4.1. Block Diagram---------------------------------------------- 7

4.2. Circuit Operation------------------------------------------- 8

5 Location of Controls and Components ------------------12

6 Installation Instructions ---------------------------------------12

7 Operating Instructions-----------------------------------------12

7.1. For Service Hint-------------------------------------------12

8 Troubleshooting Guide ----------------------------------------13

8.1. Service Hints-----------------------------------------------13

8.2. Pulse Dialing Problems ---------------------------------13

8.3. Tone Dialing Problems ----------------------------------14

8.4. No Ringing Sound When Ring Signal is Input ----14

9 Disassembly and Assembly Instructions ---------------15

9.1. Disassembly Instructions -------------------------------15

9.2. Assembly Instruction-------------------------------------17

10 Miscellaneous ----------------------------------------------------21

10.1. IC Block diagram -----------------------------------------21

10.2. How to Replace the Flat Package IC ----------------25

10.3. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------27

11 Schematic Diagram ---------------------------------------------28

11.1. For Schematic Diagram---------------------------------28

11.2. Schematic Diagram (Main)-----------------------------30

11.3. Schematic Diagram (Operation) ----------------------32

12 Printed Circuit Board-------------------------------------------35

12.1. Circuit Board (Main)--------------------------------------35

12.2. Circuit Board (Operation) -------------------------------37

13 Exploded View and Replacement Parts List -----------39

13.1. Cabinet and Electrical Parts ---------------------------39

13.2. Accessories -----------------------------------------------40

13.3. Replacement Part List-----------------------------------41

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

1 Safety Precautions

1.1. For Service Technicians

•Repair service shall be provided in accordance with repair technology information such as service manual so as to pre-

vent fires, injury or electric shock, which can be caused by improper repair work.

1. When repair services are provided, neither the products nor their parts or members shall be remodeled.

2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.

3. FASTON terminals shall be plugged straight in and unplugged straight out.

•ICs and LSIs are vulnerable to static electricity.

When repairing, the following precautions will help prevent recurring malfunctions.

1. Cover plastic parts boxes with aluminum foil.

2. Ground the soldering irons.

3. Use a conductive mat on worktable.

4. Do not grasp IC or LSI pins with bare fingers.

2Warning

2.1. Battery Caution

1. Danger of explosion if battery is incorrectly replaced.

2. Replace only with the same or equivalent type recommended by the manufacturer.

3. Dispose of used batteries according to the manufacturer's Instructions.

2.2. 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 con-

tains 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 tem-

perature 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).

component

solder

remove all of the

excess solder

slice view

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

2.2.1. 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 manufac

turer's specific instructions for the melting points of their products and any precautions for using their product with other materi-

als. 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.

2.3. Discarding of P. C. Board

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

0.3mm X 100g 0.6mm X 100g 1.0mm X 100g

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

3 Specifications

Note:

• Design and specifications are subject to change without notice.

Power Source: From telephone line

From 3 AA (LR6, R6, UM-3) batteries

Memory Capacity: 50 Caller ID memory, 50 Directory memory.

Redial: The unit redials the last dialed number

Microphone: Electret condenser microphone

Input Jack: Telephone Line

Approx. 93 mm x 172 mm x 220 mmDimensions (H x W x D):

Mass (weight): Approx. 550

Operating Enviroment: 0 oC - 40 oC, 20 % - 80 % relative air humidity (dry)

Speaker Unit: Unit: 5.7cm (2.5") PM magnetic type 32

Handset: 3 cm (113/16") PM dynamic type 150

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

4 Technical Descriptions

4.1. Block Diagram

1R5D,3D1CP1

MIC (2AP)

6D,4D1CI

D601

Q107 Q101, Q103 D101 T

IC601

Handset/Headset

MIC

Q108

IC201, Q201

D302

Q110

D301

IC871 IC302

IC831 1AP PCB D505

IC861

IC651

4.5V

2AP PCB IC501, Q501, Q502 Battery

LCD

KX-TS880 / TS2388 Series : BLOCK DIAGRAM

Q422

Q401, Q402, Q403

IC801

MICON

Ringer indication LED

LED1 (Small PCB)

JOHN SMITH

1234567890

RINGER

INUSE / EXHOOK

Line

ON/OFF

Handset Receiving

Amp

EEPROM

128K

TIPIN

Sidetone

Bridge

RESET

BATTLOW

Reset IC

2.7V

Handset

Sending

Amp

Keyboard

Switch

RINGIN

Battery Low

Detector

Regulator

3.3 V

FSK / DTMF Circuit

Wakeup Circuit

WAKE UP

Dummy Ringer

Circuit

SP-Phone

Circuit

Expander

I/O IC

DRIN

DTMF

Dial Tone

Detect

Ex-Hook

Detect

TONE_DET

In Use

Detect

PGAIN2

RING_DET

D801

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

4.2. Circuit Operation

4.2.1. Bell Detector Circuit

When the bell signal is input from LINE to T/R (when the telephone rings), the signal is output at the speaker via the following

path :

T/R R1/C1 D1/LED1 (small PCB) D3/D4 IC1 (pin8) IC1 (pin5) PC1 C5 SW2 (R7/R8/R9)T1 Speaker

4.2.2. Dummy Ringer Circuit

When {AOH}button is pressed during incoming call (Caller ID AOH mode), dummy ring function will be activated.

The bell signal from LINE stops and Caller ID is received.

Set will keep on ringing by the dummy ring function until the handset is picked up / speakerphone is on.

The dummy ring signal is generated from IC801 via the following path :

(Speakerphone will be activated during dummy ring)

IC801 (pin 89)R901 Q2 SW2 ( R11/R12/R13 ) C8 R615 C616 IC601 (pin 19) IC601 (pin 15)C618 

Speaker

4.2.3. Telephone Line Interface

4.2.3.1. Circuit operation

•On hook

Q101 is OFF, on-hook condition where DC loop is disconnected and voice signal flow is cut.

•Off hook

During Off-Hook, pin 1_3 of SW101 and Q101 is ON, providing an off-hook condition (active DC current flow through the circuit)

and the following is the signal flow :

T POS101 L101 D101(+) Q101 R180 Q107 R119 D103 D101(-) L102 R

•Receiving signal flows:

LINE Q101 R180 C109 C401 R401 L412 L401 Q401 C404 R405 R417 L405 C405 L406

Q402 C408 R413 L409 Q403 C410 VR401 SP (handset)

•Transmission signal flows:

MIC (handset) C422 VR402 R423 C425 L421 R430 Q422 R429 C429 L107 Q107 Q101 

R180 LINE

•Pulse Dial

A pulse signal switches repeatedly between high and low logic is output from IC801 (pin 73), on and off the line loop, generating

the pulse dial signal.

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

4.2.4. Speakerphone Circuit

4.2.4.1. Function

The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when the

unit is used in the hands -free mode.

4.2.4.2. Circuit Operation

The speakerphone can only provide a one-way communication path.

In other words, it can either transmit an outgoing signal or receive an incoming signal at a given time, but cannot do both simul-

taneously. Therefore, a switching circuit is necessary to control the flow of the outgoing and incoming signals.

This switching circuit is contained in IC601 and consists of a Voice Detector, TX Attenuator, RX Attenuator, Comparator and

Attenuator Control. The circuit analyzes whether the TX(transmit) or the RX(receive) signal is louder, and then it processed the

signals such that the louder signal is given precedence.

The Voice Detector provides a DC input to the Attenuator Control corresponding to the TX signal.

The Comparator receives a TX and a RX signal, and supplies a DC input to the Attenuator Control corresponding to the RX sig-

nal.

The Attenuator Control provides a control signal to the TX and the RX attenuator to switch the appropriate signals on and off.

The Attenuator Control also detects the level of the volume control to automatically adjust for changing ambient conditions.

1. Transmission signal path:

The input signal from the microphone is sent through the circuit via the following path: MIC Pin 9 of IC601 Pin 10 of

IC601 Pin 3 of IC601 Pin 4 of IC601 R601 C602 L107 Q107 Tel line.

2. Reception signal path:

Signals receive from the telephone line are outputted at the speaker via the following path: Tel line Q107 Q401 C404

R600 C603 Pin 27 of IC601 Pin 26 of IC601 Pin 19 of IC601 Pin 15 of IC601 Speaker.

3. Transmission/Reception switching

The comparison result between TX and RX outputs as a DC level of Pin 25 of IC601. TX level is high ...... Pin 25 = Pin 21 -

6mV RX level is high ...... Pin 25 = Pin 21 - 150mVComparator output is connected to the attenuator control inside of IC601.

4. Voice detector

The output of the mic amp (Pin 10 of IC601) is supplied to Pin 13 of IC601 as a control signal for the voice detector.

5. Attenuator control

The attenuator control detects the setting of the volume control through Pin 24 of IC601 to automatically adjust for changing

ambient conditions.

KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW

4.2.5. Initializing Circuit

4.2.5.1. Function

This circuit is used to initialize the CPU when the batteries are installed.

4.2.5.2. Circuit Operation

When the batteries is inserted into the unit, then the voltage is regulated by IC302 and power is supplied to the CPU. The set

can operate in the circuit voltage diagram.

Regulator

(1AP PCB)

Reset Circuit

(2AP PCB)

IC302

VIN

GND

VOUT

STBY

C301

Battery 4.5V

C302

C304

C303

D301

C864

IC861

VOUT

VCC

GND

Q862

VCC

R863

R862

R833

R864

C862

Stop

Reset

Vcc

IC801 (105)

3.3V

IC801 (81)

IC801 (50)

Reset

CPU Reset

Stop

2.7 V

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