Panasonic KX-WT115CE Service Manual

ORDER NO. KMS1010787CE

DECT Portable Station

Model No. KX-WT115CE

(for Europe)

KX-WT115CE

TABLE OF CONTENTS

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

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

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

2.1. About Lead Free Solder (PbF: Pb free) --------------4

2.1.1. Suggested PbF Solder -------------------------------5

2.1.2. Information for Users on Collection and Disposal of Old Equipment and used Batteries -------------------------------------------------5

2.2. Battery Caution ---------------------------------------------5

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

3 Specifications ------------------------------------------------------6 4 Technical Descriptions------------------------------------------7

4.1. Block Diagram (Handset) --------------------------------7

4.2. Block Diagram (Handset_RF Part) --------------------8

4.3. Circuit Operation (Handset) -----------------------------9

4.3.1. Outline----------------------------------------------------9

4.3.2. Power Supply Circuit/Reset Circuit ---------------9

4.3.3. Charge Circuit ---------------------------------------- 10

4.3.4. Battery Low/Power Down Detector ------------- 10

4.3.5. Speakerphone---------------------------------------- 10

4.4. Circuit Operation (Charger Unit) --------------------- 11

4.5. Signal Route----------------------------------------------- 12

5 Location of Controls and Components------------------ 13

5.1. Handset----------------------------------------------------- 13

6 Installation Instructions---------------------------------------14

6.1. Charger Connection ------------------------------------- 14

6.2. Battery ------------------------------------------------------ 14

6.2.1. Battery Installation ---------------------------------- 14

6.2.2. Charging the Battery-------------------------------- 14

7 Operating Instructions ---------------------------------------- 15

7.1. Soft Keys --------------------------------------------------- 15

7.2. Handset Setting Menu Layout ------------------------ 15

7.3. Key Lock---------------------------------------------------- 16

7.4. Selecting the Display Language---------------------- 16

7.5. Display ------------------------------------------------------ 17

7.6. Operation Outline ---------------------------------------- 18

7.7. Main Menu ------------------------------------------------- 18

7.8. Character Mode Table ---------------------------------- 19

7.9. For Service Hint ------------------------------------------ 19

8 Service Mode -----------------------------------------------------20

8.1. Key Operation--------------------------------------------- 20

8.2. Service Registration ------------------------------------- 22

8.3. How to Clear User Setting (Handset Only) -------- 24

8.4. Deregistering only Handset---------------------------- 24

9 Troubleshooting Guide---------------------------------------- 25

9.1. Troubleshooting Flowchart----------------------------- 25

9.1.1. Check Power ----------------------------------------- 25

9.1.2. Check Battery Charge------------------------------ 26

9.1.3. Check Link -------------------------------------------- 27

9.1.4. Check the RF part----------------------------------- 29

9.1.5. Check Handset Transmission -------------------- 30

9.1.6. Check Handset Reception ------------------------ 30

9.2. Troubleshooting by Symptom (Charger Unit) ----- 31

9.2.1. Check Point (Charger Unit) ----------------------- 31

9.3. Troubleshooting by Symptom (Handset) ----------- 31

9.3.1. Check Point (Handset) ----------------------------- 31

PAG E PAG E

10 Disassembly and Assembly Instructions -------------- 34

10.1. Disassembly Instructions ------------------------------ 34

10.1.1. Handset ----------------------------------------------- 34

10.1.2. Charger Unit------------------------------------------ 35

10.2. How to Replace the Handset LCD ------------------ 36

11 Measurements and Adjustments-------------------------- 37

11.1. Equipment Required ------------------------------------ 37

11.2. The Setting Method of JIG ---------------------------- 37

11.2.1. Connections (Handset) ---------------------------- 37

11.2.2. How to execute Test command------------------ 38

11.2.3. Commands ------------------------------------------- 38

11.2.4. Download Manual----------------------------------- 39

11.3. Adjustment Standard (Charger Unit)---------------- 43

11.3.1. Bottom View ------------------------------------------ 43

11.4. Adjustment Standard (Handset) --------------------- 44

11.4.1. Component View ------------------------------------ 44

11.5. Things to Do after Replacing X'tal------------------- 45

11.5.1. How to download the data ------------------------ 45

11.6. RF Specification------------------------------------------ 45

11.6.1. Handset ----------------------------------------------- 45

11.7. How to Check the Handset Speaker or Receiver---------------------------------------------------- 46

11.8. Frequency Table (MHz) -------------------------------- 46

12 Miscellaneous --------------------------------------------------- 47

12.1. How To Replace a Flat Package IC----------------- 47

12.1.1. Preparation ------------------------------------------- 47

12.1.2. Removal Procedure -------------------------------- 47

12.1.3. Procedure --------------------------------------------- 47

12.1.4. Removing Solder From Between Pins--------- 47

12.2. How to Replace the LLP (Leadless Leadframe Package) IC and IC ground plate-------------------- 48

12.2.1. Preparation ------------------------------------------- 48

12.2.2. Caution ------------------------------------------------ 48

12.2.3. How to Remove the IC ---------------------------- 48

12.2.4. How to Install the IC-------------------------------- 48

12.2.5. How to Remove a Solder Bridge (Doesn't apply to IC ground plate.) ------------------------- 49

12.3. How to Replace the Shield Case -------------------- 50

12.3.1. Preparation ------------------------------------------- 50

12.3.2. Caution ------------------------------------------------ 50

12.3.3. How to Remove the Shield Case --------------- 50

12.3.4. How to Install the Shield Case------------------- 50

12.4. Terminal Guide of the ICs, Transistors and Diodes ------------------------------------------------------ 51

12.4.1. Handset ----------------------------------------------- 51

13 Schematic Diagram -------------------------------------------- 51

13.1. For Schematic Diagram -------------------------------- 51

13.1.1. Handset (Schematic Diagram (Handset_Main)) ------------------------------------ 51

13.1.2. Charger Unit (Schematic Diagram (Charger Unit))--------------------------------------- 51

13.2. Schematic Diagram (Handset_Main) --------------- 52

13.3. Schematic Diagram (Handset_LED)---------------- 54

13.4. Schematic Diagram (Charger Unit) ---------------- 54

14 Printed Circuit Board---------------------------------------- --55

14.1. Circuit Board (Handset_Main)---------------------- --55

14.1.1. Component View---------------------------------- --55

14.1.2. Bottom View---------------------------------------- --56

14.2. Circuit Board (Handset_LED) ---------------------- --57

14.3. Circuit Board (Charger Unit) ------------------------ --58

14.3.1. Component View---------------------------------- --58

14.3.2. Bottom View---------------------------------------- --58

15 Exploded View and Replacement Parts List -------- --59

15.1. Cabinet and Electrical Parts (Handset) ---------- --59

15.2. Cabinet and Electrical Parts (Charger Unit) ---- --60

15.3. Accessories and Packing Materials--------------- --61

15.4. Replacement Parts List ------------------------------ --62

15.4.1. Handset --------------------------------------------- --62

15.4.2. Charger Unit --------------------------------------- --64

15.4.3. Accessories and Packing Materials ---------- --64

15.4.4. Fixtures and Tools -------------------------------- --64

KX-WT115CE

1 Safety Precautions

1. Before servicing, unplug the AC power cord to prevent an electric shock.

2. When replacing parts, use only the manufacturer's recommended components.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent the customer from being exposed to shock hazards.

1.1. For Service Technicians

• Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent 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. 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).

KX-WT115CE

2.1.1. 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.

2.1.2. Information for Users on Collection and Disposal of Old Equipment and used Batteries

2.2. 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.

2.3. 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.

KX-WT115CE

3 Specifications

Handset Charger Unit

Standard: DECT= (Digital Enhanced Cordless Telecommunications)

GAP= (Generic Access Profile) Power Source: Rechargeable Ni-MH battery AC Adaptor Number of Channels: 120 Duplex Channels Frequency Range: 1.88GHz to 1.9GHz Duplex Procedure: TDMA (Time Division Multiple Access) Battery Life, Handset (if batteries are fully charged): Stand-by: Up to 150 hours (Ni-MH)

Talk: Up to 8 hours (NR-Off), 7 hours (NR-On) Channel Spacing: 1728kHz Bit rate Spacing: 1152kbit/s Operating Conditions: 5~40 °C, 20~80% relative air humidity (dry) Modulation: GFSK= (Gaussian Frequency Shift Keying) RF Transmission Power: approx. 250mW Voice Coding: ADPCM 32 kbit/s Operation Range: Up to 300 m outdoors, Up to 50 m indoors Dimensions (D x W x L): 48 mm x 33 mm x 160 mm 85 mm x 72 mm x 52 mm Weight: approx. 130g approx. 60g

4 Technical Descriptions

IC1

IC3

MIP MIN

HSSPOUTP

LOUT

BELL_LED

HSMIP

HEADSET_DET

SPOUTP SPOUTN

CKM//STM

CKM/STM

BBIC

RESET

CHG_CTL

CHG_DET

WP, CLK, DATA

KEYSTOROBE_A~E

KEYIN_1~5

CHARGE

MIC

Receiver

Headset Jack

CN4

LED

Monitor SP

LCD

CHARGE PUMP

IC4

KEYS

RF part

ANT1

13.824 MHz

EEPROM

VBAT

BATTERY

LED (LCD)

RSTN

(BELL)

VBAT

4.0V VBAT

RXn

RXp

RXON

TXp TXn

TXON

KX-WT115CE BLOCK DIAGRAM (Handset

)

KEY_LED

CP_OFF

LED

(KEY)

4.1. Block Diagram (Handset)

KX-WT115CE

4.2. Block Diagram (Handset_RF Part)

TXp

TXn

ANT

TXON

DA801

RXON

RXp

RXn

KX-WT115CE BLOCK DIAGRAM (Handset_RF Part)

4.3. Circuit Operation (Handset)

4.3.1. Outline

Handset consists of the following ICs as shown in Block Diagram (Handset) (P.7).

• DECT BBIC (Base Band IC): IC1

- All data signals (forming/analyzing ACK or CMD signal)

- All interfaces (ex: Key, Detector Circuit, Charge, EEPROM, LCD)

• EEPROM: IC3

- Setting data is stored. (e.g. ID, user setting)

4.3.2. Power Supply Circuit/Reset Circuit

Circuit Operation:

When power on the Handset, the voltage is as follows; BATTERY(2.2 V ~ 2.6 V: BATT+) → F1 → BBC1 (IC1) 10 pin The Reset signal generates IC1 (54 pin) and 1.8 V.

KX-WT115CE

4.3.3. Charge Circuit

Circuit Operation:

When charging the handset on the Charger Unit, the charge current is as follows; DC+pin of J1(+) → F1 → R1 → CHARGE+pad → CHARGE+(Handset) → Q4 → D7→ F1 → BATTERY+... Battery... BATTERY- → R45 → GND → CHARGE-(Handset)→ CHARGE-pad → DC-pin of J1(-) In this way, the BBIC on Handset detects the fact that the battery is charged. The charge current is controlled by switching Q9 of Handset.

4.3.4. Battery Low/Power Down Detector

Circuit Operation:

“Battery Low” and “Power Down” are detected by BBIC which check the voltage from battery. The detected voltage is as follows;

• Battery Low Battery voltage: V(Batt) 2.35 V ± 50 mV

The BBIC detects this level and " " starts flashing.

• Power Down Battery voltage: V(Batt) 2.0 V ± 50 mV The BBIC detects this level and power down.

4.3.5. Speakerphone

The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.

KX-WT115CE

4.4. Circuit Operation (Charger Unit)

Charge control is executed at handset side so that the operation when using charger is also controlled by handset. Refer to Circuit Operation (Handset) (P.9)

The route for this is as follows: DC+pin of J1(+) → F1 → R1 → CHARGE+pad → Handset → CHARGE-pad → DC-pin of J1(-).

KX-WT115CE

4.5. Signal Route

RF part signal route

5 Location of Controls and Components

5.1. Handset

KX-WT115CE

6 Installation Instructions

6.1. Charger Connection

Connect the AC adaptor to the charger.

• The AC adaptor should be connected to a vertically oriented or floor-mounted AC outlet. Do not connect the AC adaptor to a ceiling-mounted AC outlet, as the weight of the adaptor may cause it to become disconnected.

• Fasten the AC adaptor cord to the cord holder.

• Use only the included Panasonic AC adaptor.

6.2. Battery

6.2.1. Battery Installation

Open the battery cover, insert the batteries, and close the cover as indicated below.

6.2.2. Charging the Battery

At the time of shipment, the batteries are not charged. Please charge the batteries for about 7 hours before using the handset for the first time.

• When the batteries are fully charged, the charge indicator goes off and "Fully charged" is displayed.

• It is normal for the handset and charger to feel warm while the batteries are charging.

• Keep devices sensitive to magnetic fields away from the charger.

• Use only the included charger.

KX-WT115CE

7 Operating Instructions

7.1. Soft Keys

Icons and information shown on the display will vary depending on the context. To select an item shown on the display, press the corresponding soft key.

7.2. Handset Setting Menu Layout

KX-WT115CE

7.3. Key Lock

You can lock all keys while the handset is in standby mode.

7.4. Selecting the Display Language

Icons and information shown on the display will vary depending on the context. To select an item shown on the display, press the corresponding soft key.