Panasonic KX-TG2480BXS User manual

© 2005 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation o law.
KX-TG2480BXS
KX-TGA248BXS
Digital Cordless Phone
Silver Version
( or Asia, Middle Near East and Other Areas)
Telephone Equipment
ORDER NO. KM40509863CE

1 ABOUT LEAD F EE SOLDE (PbF: Pb free) 4
1.1. Suggested PbF Solder 4
1.2. How to recognize that Pb Free solder is used 5
2 FO SE VICE TECHNICIANS 5
3 CAUTION 5
4 OPE ATING INST UCTIONS 6
4.1. Battery 6
4.2. Location o Controls 8
4.3. Displays 9
4.4. Settings 10
4.5. Troubleshooting 16
5 DISASSEMBLY INST UCTIONS 19
5.1. Base Unit 19
5.2. Handset 20
6 ASSEMBLY INST UCTIONS 21
6.1. Fix the LCD to P.C. Board (Handset) 21
7 T OUBLESHOOTING GUIDE 22
7.1. Check Battery Charge 22
7.2. Check Link 23
7.3. Check the RF Part 24
7.4. Check Handset Transmission 28
7.5. Check Handset Reception 28
7.6. Check Caller ID 28
8 ADJUSTMENT AND TEST MODE 29
8.1. Test Mode Flow Chart or Base Unit 29
8.2. Test Mode Flow Chart or Handset 33
8.3. X801 (Base Unit), X201 (Handset) Check 37
8.4. Adjust Battery Low Detector Voltage (Handset) 37
8.5. Base Unit Re erence Drawing 38
8.6. Handset Re erence Drawing 40
8.7. Frequency Table 41
8.8. How to Clear User Setting (Handset Only) 42
9 DESC IPTION 43
9.1. Frequency 43
9.2. FHSS (Frequency Hopping Spread Spectrum) 43
9.3. Signal Flowchart in the Whole System 45
10 EXPLANATION OF LINK DATA COMMUNICATION 46
10.1. Calling 46
10.2. To Terminate Communication 46
10.3. Ringing 46
11 BLOCK DIAG AM (BASE UNIT_MAIN) 47
12 BLOCK DIAG AM (BASE UNIT_ F PA T) 48
13 CI CUIT OPE ATION (BASE UNIT_MAIN) 49
13.1. DSP (Digital Speech/Signal Processing: IC501) 49
13.2. EEPROM (IC700) 50
13.3. Power Supply Circuit 50
13.4. Reset Circuit 52
13.5. Telephone Line Inter ace 53
13.6. Auto Disconnect Circuit 55
13.7. Parallel Connection Detect Circuit 56
13.8. Calling Line Identi ication (Caller ID) 57
13.9. 2.4GHz Mod/Demod Circuit (Base Unit RF Part) 58
14 BLOCK DIAG AM (HANDSET_MAIN) 59
15 BLOCK DIAG AM (HANDSET_ F PA T) 60
16 CI CUIT OPE ATION (HANDSET) 61
16.1. Construction 61
16.2. Power Supply Circuit 62
16.3. Charge Circuit 63
16.4. Ringer and Handset SP-Phone 63
16.5. Sending Signal 64
16.6. Reception Signal 64
16.7. 2.4GHz Mod/Demod Circuit (Handset RF Part) 65
17 SIGNAL OUTE 66
18 CPU DATA (BASE UNIT) 67
18.1. IC501 67
19 CPU DATA (HANDSET) 68
19.1. IC201 68
20 EXPLANATION OF IC TE MINALS ( F UNIT) 69
20.1. IC901 69
21 HOW TO EPLACE A FLAT PACKAGE IC 70
21.1. PREPARATION 70
21.2. FLAT PACKAGE IC REMOVAL PROCEDURE 70
21.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 71
21.4. BRIDGE MODIFICATION PROCEDURE 71
Note:
Because CONTENTS 4 is the extract rom the Operating Instructions o this model, it is subject to change without notice. You can
download and re er to the original Operating Instructions on TSN Server or urther in ormation.
CONTENTS
Page Page
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KX-TG2480BXS / KX-TGA248BXS

22 CABINET AND ELECT ICAL PA TS (BASE UNIT) 72
23 CABINET AND ELECT ICAL PA TS (HANDSET) 73
24 ACCESSO IES AND PACKING MATE IALS 74
25 TE MINAL GUIDE OF THE ICs, T ANSISTO S AND DIODES
75
25.1. Base Unit 75
25.2. Handset 75
26 EPLACEMENT PA TS LIST 76
26.1. Base Unit 76
26.2. Handset 79
26.3. Accessories and Packing Materials 81
27 FO SCHEMATIC DIAG AM 83
27.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 83
27.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 83
28 SCHEMATIC DIAG AM (BASE UNIT) 84
29 SCHEMATIC DIAG AM (HANDSET) 86
30 SCHEMATIC DIAG AM ( F PA T) 88
31 CI CUIT BOA D (BASE UNIT) 89
31.1. Component View 89
31.2. Flow Solder Side View 90
32 CI CUIT BOA D (HANDSET) 91
32.1. Component View 91
32.2. Flow Solder Side View 92
33 CI CUIT BOA D ( F PA T) 93
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KX-TG2480BXS / KX-TGA248BXS

1 ABOUT LEAD F EE SOLDE (PbF: Pb free)
Note:
In the in ormation below, Pb, the symbol or lead in the periodic table o elements, will re er to standard solder or solder that
contains lead.
We will use PbF solder when discussing the lead ree solder used in our manu acturing process which is made rom Tin (Sn),
Silver (Ag), and Copper (Cu).
This model, and others like it, manu actured using lead ree solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type o solder although, with some precautions, standard Pb solder can also be used.
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). In case o using high temperature soldering iron, please
be care ul not to heat too long.
• • •
• PbF solder will tend to splash i it is heated much higher than its melting point, approximately 1100°F (600°C).
• • •
• I you must use Pb solder on a PCB manu actured using PbF solder, remove as much o 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 or excess which may low onto the
opposite side (See the igure below).
1.1. Suggested PbF Solder
There are several types o PbF solder available commercially. While this product is manu actured 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
manu acturer’s speci ic instructions or the melting points o their products and any precautions or using their product with other
materials.
The ollowing lead ree (PbF) solder wire sizes are recommended or service o this product: 0.3mm, 0.6mm and 1.0mm.
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KX-TG2480BXS / KX-TGA248BXS

1.2. How to recognize that Pb Free solder is used
(Example: Handset P.C.B.)
IC901 IC201
IC202
PbF
Marked
(Component View)
Note:
The location o the “PbF” mark is subject to change without notice.
2 FO SE VICE 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 oil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch IC or LSI pins with bare ingers.
3 CAUTION
1. Danger o explosion i battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manu acturer.
3. Dispose o used batteries according to the manu acture’s Instructions.
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KX-TG2480BXS / KX-TGA248BXS

4 OPE ATING INST UCTIONS
4.1. Battery
4.1.1. Battery Installation
4.1.2. Battery Charge
4.1.3. echarging the Battery
Note for service:
The battery strength may not be indicated correctly i the battery is disconnected and connected again, even a ter it is ully
charged. In that case, by recharging the battery as mentioned above, you will get a correct indication o the battery strength.
4.1.4. Battery Strength
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KX-TG2480BXS / KX-TGA248BXS

4.1.5. Battery eplacement
4.1.6. Battery Performance
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KX-TG2480BXS / KX-TGA248BXS

4.2. Location of Controls
4.2.1. Base unit
4.2.2. Handset
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KX-TG2480BXS / KX-TGA248BXS

4.3. Displays
4.3.1. Handset Display Items
4.3.2. Troubleshooting (Handset LCD)
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KX-TG2480BXS / KX-TGA248BXS

4.4. Settings
4.4.1. Connections
4.4.1.1. Connecting the AC Adaptor
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KX-TG2480BXS / KX-TGA248BXS

4.4.1.2. Connecting the Telephone Line Cord
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KX-TG2480BXS / KX-TGA248BXS

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KX-TG2480BXS / KX-TGA248BXS

4.4.2. Guide to Handset Programming
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KX-TG2480BXS / KX-TGA248BXS

4.4.3. Dial Lock
For Service Hint:
**: I the current password is orgotten, enter “726276642” and you will be able to go to the next step.
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KX-TG2480BXS / KX-TGA248BXS

4.4.4. Direct Commands
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KX-TG2480BXS / KX-TGA248BXS

4.5. Troubleshooting
If the handset display shows error messages, see “Troubleshooting (Handset LCD) (P.9)” for the Cause & solution.
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KX-TG2480BXS / KX-TGA248BXS

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KX-TG2480BXS / KX-TGA248BXS

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KX-TG2480BXS / KX-TGA248BXS

5 DISASSEMBLY INST UCTIONS
5.1. Base Unit
Shown in Fig.- To Remove Remove
1Cabinet Cover Screws (2.6 × 14).........(A) × 5
2Main P.C. Board Tape and Solder
Screws (2.6 × 8)...........(B) × 5
Main P.C. Board
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KX-TG2480BXS / KX-TGA248BXS

5.2. Handset
Shown in Fig.- To Remove Remove
3Cabinet Cover Screws (2.6 × 12)........(C) × 2
4Follow the procedure.
5Main P.C. Board Tape and Solder
6Screw (2.6 × 12)..........(D) × 1
Screws (2.6 × 9)..........(E) × 2
Charge Terminals
Main P.C. Board
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KX-TG2480BXS / KX-TGA248BXS