Panasonic KX-T7665AL Manuale utente

rights reserved. Unauthorized copying and

distribution is a violation of law.

KX-T7665AL

KX-T7665X

(for Australia, Asia, Middle Near East, Africa and Latin

America)

Digital Proprietary Telephone

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.

ORDER NO. KMS0307792C3

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 SPECIFICATIONS 5

4 LOCATION OF CONTROLS 5

5 CONNECTION 6

6 DISASSEMBLY INSTRUCTIONS 7

7 HOW TO REPLACE A FLAT PACKAGE IC 8

7.1. PREPARATION 8

7.2. PROCEDURE 8

7.3. REMOVING SOLDER FROM BETWEEN PINS 8

8 TROUBLESHOOTING GUIDE 9

8.1. NO OPERATION 9

8.2. LCD DOES NOT OPERATE 10

8.3. HANDSET DOES NOT WORK 11

8.4. SPEAKER-PHONE TROUBLE 12

8.5. DXDP-DPT DOES NOT WORK 13

9 BLOCK DIAGRAM 14

10 CIRCUIT OPERATIONS 15

10.1. KEY INPUT CONTROL CIRCUIT 15

10.2. LCD CONTROL CIRCUIT 16

10.3. LED CIRCUIT 17

10.4. RESET CIRCUIT 18

10.5. POWER SUPPLY CIRCUIT 18

10.6. DATA COMMUNICATION 19

10.7. DXDP COMMUNICATION 20

10.8. ANALOG CIRCUIT 21

11 IC DATA 23

11.1. IC2 23

11.2. IC6 25

12 TERMINAL GUIDE OF ICs, TRANSISTORS AND DIODES 26

13 CABINET AND ELECTRICAL PARTS LOCATION 27

14 ACCESSORIES AND PACKING MATERIALS 28

15 REPLACEMENT PARTS LIST 29

15.1. CABINET AND ELECTRICAL PARTS 29

15.2. ACCESSORIES AND PACKING MATERIALS 29

15.3. MAIN BOARD PARTS 29

16 FOR THE SCHEMATIC DIAGRAM 31

17 SCHEMATIC DIAGRAM 32

18 WAVEFORM 34

19 PRINTED CIRCUIT BOARD (MAIN BOARD) 37

19.1. COMPONENT VIEW 37

19.2. BOTTOM VIEW 38

CONTENTS

Page Page

KX-T7665AL / KX-T7665X

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 although, with some precautions, standard Pb solder can also be used.

Caution

PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with

temperature control and adjust it to 700° ± 20° F, (370° ± 10°C). In case of using high temperature soldering iron, please

be careful not to heat too long.

PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).

If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible

and be sure that any remaining is melted prior to applying the Pb solder.

When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See 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 gauges are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

KX-T7665AL / KX-T7665X

1.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED

PbF is stamped to show that Pb free solder is used. (See the figure below.)

R521

R516

C107

R112 R116

R114

C108

R115

R109 C102

R104

R106

R107

R108

R110

C105

C104

C103

R100

R111

C106

C114

R129

R119

R402 R303

R310 R306

R309

R311

R305

R302

R301

R304

R300

L1 C605

R611

D62

D61 C604

D63

C603

R308

R307

R406

C401

R517

R113

R103

C404

C405 R400

C101

R105

A6 B6

B5 E2 E1 IC6

F4 F2

R407

IC2

C400

C403

X1 B4

JK1

C110

R114

C118

C112

101

Q33 Q34 Q35

Q31

Q32

R519

R520

A4 PN9

33 48

R401

C402

C407

R102

C100

R101 C406 R403

IC7

R132

C113 C109

C116

C115

R130

32 49

C607

C606

10 1

CN5

R601

C602 R602

R604

R603 R600 C601C600

IC8

D5V

R607

IC5

R609

R608

C609

E3 JK2

R610

33 48

32 49

CN3

21 CN2

R200

C205

PSUP1439Z-A

PbF

R135

C120

D3V Q5

R139 R138

R133

R137

C204

JK3

AG1

SP1

SPN

SPP

Q52

Q51

R504

IC4

IC3

Q23

C203

R206

R209

IC1

R208

R204

Q22

R207

Q21

C201 R202

L21

C504

C518

R514

R511

C528

R513

R518

MIC2

AG2

GNDC516

R510

C509

C511

C512 R509

C508

C507

R512

C514 R507C519

C502

R508

C513

R605

C608

R606

R503

C503

C510

C521

A3V

MIC1

C500

C501

R527

C525

R522

R523

C527

C517

R500

R501

R502

R505

C520

C524

C522 R525

R142

R140

R119

R205 R203

R524

C202

C200

R136

R134

D21

R131

C111

R201

R117

C117

R515

R526

C505

R506

C506

C515

C526

C523

RU CNGen

GRA

L51

L52

CN1

PSUP1439Z-B

PbF

D44

D43

Marked PbF

KX-T7665AL / KX-T7665X : MAIN BOARD

KX-T7665AL / KX-T7665X

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.

3 SPECIFICATIONS

Station Loop Limit: 90 ohms

Calling Method: 2 pair wire

Jacks: Handset Jack, TEL Jack

Dimensions: Low Angle:

High Angle: 213 (D)mm ×177 (W)mm ×107 (H)mm

201 (D)mm ×177 (W)mm ×127 (H)mm

Weight: 0.7 kg

Design and specifications are subject to change without notice.

4 LOCATION OF CONTROLS

KX-T7665AL / KX-T7665X

5 CONNECTION

Caution:

The availability of D-XDP function depends on the software version of the connected Business Telephone System.

Consult your dealer for more details about D-XDP.

KX-T7665AL / KX-T7665X

6 DISASSEMBLY INSTRUCTIONS

1. Remove the Stand.

2. Remove 5 Screws (A).

3. Remove the Cabinet Cover.

4. Remove the Connector from the Main Board.

5. Remove 2 Screws (A).

6. Remove the Main Board and the LCD from the Cabinet Body.

KX-T7665AL / KX-T7665X

7.1. PREPARATION

PbF (: Pb free) Solder

Soldering Iron

Tip Temperature of 700°F±20°F (370°C±10°C)

Note: We recommend a 30 to 40 Watt soldering iron. An

expert may be able to use a 60 to 80 Watt iron where

someone with less experience could overheat and damage

the PCB foil.

Flux

Recommended Flux: Specific Gravity →0.82.

Type →RMA (lower residue, non-cleaning type)

Note: See ABOUT LEAD FREE SOLDER (PbF: Pb free)

(P.3).

7.2. PROCEDURE

1.Tack the flat pack IC to the PCB by temporarily soldering

two diagonally opposite pins in the correct positions on the

PCB.

Be certain each pin is located over the

correct pad on the PCB.

2.Apply flux to all of the pins on the IC.

3.Being careful to not unsolder the tack points, slide the

soldering iron along the tips of the pins while feeding

enough solder to the tip so that it flows under the pins as

they are heated.

7.3. REMOVING SOLDER FROM

BETWEEN PINS

1.Add a small amount of solder to the bridged pins.

2.With a hot iron, use a sweeping motion along the flat part of

the pin to draw the solder from between the adjacent pads.

7 HOW TO REPLACE A FLAT PACKAGE IC

KX-T7665AL / KX-T7665X

8 TROUBLESHOOTING GUIDE

8.1. NO OPERATION

Note:

Refer to (1)~(4) of WAVEFORM (P.34) for waveform.

KX-T7665AL / KX-T7665X

8.2. LCD DOES NOT OPERATE

Note:

Refer to (5)ofWAVEFORM(P.34) for waveform.

KX-T7665AL / KX-T7665X

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