Panasonic KX-TG2240BXS User manual

© 2003 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TG2240BXS
KX-TGA228BXS
Digital Cordless Phone
Silver Version
(for Asia, Middle Near East and Other areas)
Telephone Equipment
ORDER NO. KM40309201C3

1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 4
1.1. Suggested PbF Solder 4
1.2. How to recognize that Pb Free solder is used 5
2 FOR SERVICE TECHNICIANS 6
3 CAUTION 6
4 BATTERY 7
4.1. Installing the Battery in the Handset 7
4.2. Battery Charge 7
4.3. Battery Recharge 7
4.4. Battery Strength 7
4.5. Battery Replacement 8
4.6. Battery information 8
5 LOCATION OF CONTROLS 9
5.1. Base Unit 9
5.2. Handset 10
6 DISPLAY 11
6.1. Troubleshooting 11
7 SETTINGS 14
7.1. Connections 14
7.2. Dialing Mode (Handset) 14
7.3. Line Mode (Handset) 15
7.4. Voice Enhancer Technology 15
7.5. Direct Commands 16
8 OPERATIONS 17
8.1. Making Calls 17
8.2. Answering Calls 20
8.3. FLASH Button 21
8.4. Dial Lock (use either Handset or Base Unit) 22
8.5. Phone Book (Handset) 24
9 DISASSEMBLY INSTRUCTIONS 28
10 ASSEMBLY INSTRUCTIONS 30
10.1. Fix the LCD to P.C. Board (Handset) 30
11 TROUBLESHOOTING GUIDE 31
11.1. Check Power 32
11.2. Check Sp-phone Transmission 32
11.3. Check Sp-phone Reception 33
11.4. Check Battery Charge 34
11.5. Check Link 34
11.6. Check the RF Unit 35
11.7. Check Handset Transmission 40
11.8. Check Handset Reception 40
11.9. Check Caller ID 40
12 TEST MODE 41
12.1. Test mode flow chart for Base Unit 41
12.2. Test mode flow chart for Handset 42
12.3. X201 Check 43
12.4. Adjustment Battery Low Detector Voltage 43
12.5. Base Unit Reference Drawing 44
12.6. Handset Reference Drawing 45
12.7. Frequency Table 46
13 DESCRIPTION 47
13.1. Frequency 47
13.2. Time Division Duplex (TDD) operation 47
13.3. Signal Flowchart in the Whole System 48
14 EXPLANATION OF BBIC (Base Band IC) DATA
COMMUNICATION 49
14.1. Calling 49
14.2. To Terminate Communication 49
14.3. Ringing 49
14.4. Ports for Transmitting and Receiving of Data 49
15 BLOCK DIAGRAM (BASE UNIT) 50
16 CIRCUIT OPERATION (BASE UNIT) 51
16.1. DSP (Digital Speech/Signal Processing: IC201) 51
16.2. Flash Memory (IC300) 51
16.3. Power Supply Circuit 52
16.4. Reset Circuit 53
16.5. Locator/Intercom Mode 54
16.6. Telephone Line Interface 54
16.7. Auto Disconnect Circuit 55
16.8. Parallel Connection Detect Circuit 55
16.9. Calling Line Identification (Caller ID) 56
17 BLOCK DIAGRAM (HANDSET) 57
18 CIRCUIT OPERATION (HANDSET) 58
18.1. Construction 58
18.2. Power Supply Circuit 58
18.3. Reset Circuit 59
18.4. Charge Circuit 60
18.5. Ringer and Handset SP-Phone 60
18.6. Sending Signal 60
18.7. Reception Signal 61
19 SIGNAL ROUTE 62
20 CPU DATA (BASE UNIT) 63
20.1. IC201 63
21 CPU DATA (HANDSET) 64
CONTENTS
Page Page
2
KX-TG2240BXS / KX-TGA228BXS

21.1. IC201 64
22 EXPLANATION OF RF UNIT TERMINALS 65
22.1. IC801 65
23 HOW TO REPLACE A FLAT PACKAGE IC 66
23.1. Preparation 66
23.2. Procedure 66
23.3. Removing Solder from Between Pins 66
24 CABINET AND ELECTRICAL PARTS (BASE UNIT) 67
25 CABINET AND ELECTRICAL PARTS (HANDSET) 68
26 ACCESSORIES AND PACKING MATERIALS 69
27 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES
70
27.1. Base Unit 70
27.2. Handset 70
28 REPLACEMENT PARTS LIST 71
28.1. Base Unit 71
28.2. Handset 73
28.3. Accessories and Packing Materials 75
29 FOR SCHEMATIC DIAGRAM 76
29.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 76
29.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 76
29.3. Memo 77
30 SCHEMATIC DIAGRAM (BASE UNIT) 78
30.1. Main 78
30.2. Operation 80
30.3. Memo 81
31 SCHEMATIC DIAGRAM (HANDSET) 82
32 CIRCUIT BOARD (BASE UNIT) 84
32.1. Main 84
32.2. Operation 86
33 CIRCUIT BOARD (HANDSET) 88
33.1. Main 88
3
KX-TG2240BXS / KX-TGA228BXS

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 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°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 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 manufac
turer’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: 0.3mm, 0.6mm and 1.0mm.
4
KX-TG2240BXS / KX-TGA228BXS

1.2.1. Base Unit
1.2.1.2. Operation
PbF
MIC
Marked
(Component View)
PbF
3112 45
ANS
LED903 ANS
LED903
VM
LED900
INUSE
R905
C902 LED901
SP
R904 R900
C901 R902 R903 C900 R901
REP
LCD900
REC CHK MSG1 MSG2
ERS MEMO
RDL
FLS
MUTE
SP
HLD
2
1
5
6
87
GND
29
VCC
18
15 16 17 21 23 26
25
28
30
27 19
202224
4
0
130
118
ICOM
CN900 CN901
6791113
1210814
#
9
MIC
UPDOWN
MICP
MICM
3
SKIP
STOP
LED904 CIQ
Marked
(Flow Solder Side View)
1.2. How to recognize that Pb Free solder is used
1.2.1.1. Main
18
1
1
30
PbF
IC201
CN101 CN100
30 51
50
1
Marked
(Component View)
Note:
The location of the “PbF” mark is subject to change without notice.
Note:
The location of the “PbF” mark is subject to change without notice.
5
KX-TG2240BXS / KX-TGA228BXS

1.2.2. Handset
IC801
IC201
PbF
ANTANTG
Marked
(Component View)
Note:
The location of the “PbF” mark is subject to change without notice.
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 CAUTION
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommendenced by the
manufacturer.
Dispose of used batteries according to the manufacture’s Instructions.
6
KX-TG2240BXS / KX-TGA228BXS

4 BATTERY
4.1. Installing the Battery in the Handset
4.2. Battery Charge
4.3. Battery Recharge
Note for Service:
The battery strength may not be indicated correctly if the battery is disconnected and connected again, even after it is fully
charged.
In that case, by recharging the battery as mentioned above, you will get a correct indication of the battery strength.
4.4. Battery Strength
7
KX-TG2240BXS / KX-TGA228BXS

4.5. Battery Replacement
4.6. Battery information
8
KX-TG2240BXS / KX-TGA228BXS

5 LOCATION OF CONTROLS
5.1. Base Unit
9
KX-TG2240BXS / KX-TGA228BXS

5.2. Handset
10
KX-TG2240BXS / KX-TGA228BXS

6 DISPLAY
6.1. Troubleshooting
11
KX-TG2240BXS / KX-TGA228BXS

12
KX-TG2240BXS / KX-TGA228BXS

13
KX-TG2240BXS / KX-TGA228BXS

7 SETTINGS
7.1. Connections
7.2. Dialing Mode (Handset)
14
KX-TG2240BXS / KX-TGA228BXS

7.3. Line Mode (Handset)
7.4. Voice Enhancer Technology
15
KX-TG2240BXS / KX-TGA228BXS

7.5. Direct Commands
Note:
*1: Refer to Voice Enhancer Technology (P.15).
16
KX-TG2240BXS / KX-TGA228BXS

8 OPERATIONS
8.1. Making Calls
8.1.1. Using the Handset
17
KX-TG2240BXS / KX-TGA228BXS

18
KX-TG2240BXS / KX-TGA228BXS

8.1.2. Using the Base Unit
19
KX-TG2240BXS / KX-TGA228BXS

8.2. Answering Calls
8.2.1. Base Unit
8.2.2. Handset
20
KX-TG2240BXS / KX-TGA228BXS