Panasonic KX-TCD445BXS User manual

© 2004 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TCD445BXS
KX-TCD445BXT
KX-TCD445BXF
KX-A144BXS
KX-A144BXT
KX-A144BXF
Digital Cordless Answering System
New Silver Version
Titanium Black Version
Metallic Blue Version
(for Asia, Middle Near East and Other areas)
Telephone Equipment
ORDER NO. KM40406482C3

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 7
3 CAUTION 7
4 BATTERY 8
4.1. Battery Installation 8
4.2. Battery Charge 8
4.3. Battery Life 9
4.4. Replacing the Batteries 9
5 LOCATION OF CONTROLS 10
5.1. Base Unit 10
5.2. Handset 10
6 SETTINGS 11
6.1. Connections 11
6.2. Ringer Volume 12
6.3. PIN Code 13
6.4. Reset 14
6.5. Key Lock 15
6.6. R button to use the flash feature 15
6.7. Pause button for PBX (line/long distance service users) 15
6.8. Setting Call Restriction 16
6.9. Cancelling a Restricted Number 16
6.10. Setting Call BAR 16
6.11. Selecting the Display Language 17
6.12. Setting Dialling Mode (Tone/Pulse) 17
6.13. Setting Flash Time 17
7 DISPLAY 18
7.1. Handset Display 18
7.2. Caller ID Display 18
7.3. Before Requesting Help (Troubleshooting) 20
8 OPERATIONS 22
8.1. Turning the Power On/Off 22
8.2. Setting the Time and Date 22
8.3. Redialling 22
8.4. Phonebook 23
8.5. Registering a Handset to a Base Unit 25
8.6. Selecting a Base Unit 26
8.7. Answering System 27
9 DISASSEMBLY INSTRUCTIONS 30
9.1. Base Unit 30
9.2. Handset 31
9.3. Charger Unit 32
10 ASSEMBLY INSTRUCTIONS 33
10.1. Warning When Constructing the Base Unit 33
10.2. Processing of Ringer/Charge Terminal Lead 34
11 TROUBLESHOOTING GUIDE 35
11.1. Check Power 36
11.2. Check Battery Charge 37
11.3. Check Link 38
11.4. Check Handset Transmission 40
11.5. Check Handset Reception 40
11.6. Check Caller ID 40
11.7. TAM Voice Prompt Problems 41
11.8. Bell Reception 42
12 CHECK PROCEDURE (BASE UNIT) 43
12.1. Preparation 43
12.2. PC Setting 43
12.3. TAM Voice Prompt Download 44
13 CHECK PROCEDURE (HANDSET) 45
13.1. Preparation 45
13.2. PC Setting 45
14 ADJUSTMENTS (BASE UNIT AND CHARGER UNIT) 46
14.1. Adjustment (Base Unit) 46
14.2. Adjustment Standard (Base Unit) 49
14.3. Adjustment (Charger Unit) 51
14.4. Adjustment Standard (Charger Unit) 51
15 ADJUSTMENTS (HANDSET) 52
15.1. Adjustment (Handset) 52
15.2. Adjustment Standard (Handset) 55
16 RF SPECIFICATION 56
16.1. Base Unit 56
Note:
Because CONTENTS 4 to 8 are the extracts from the Operating Instructions of this model, they are subject to change without
notice. Please refer to the original Operating Instructions for further information.
CONTENTS
Page Page
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

16.2. Handset 56
17 HOW TO CHECK THE HANDSET SPEAKER OR RECEIVER 56
18 FREQUENCY TABLE (MHz) 57
19 BLOCK DIAGRAM (BASE UNIT) 58
20 CIRCUIT OPERATION (BASE UNIT) 59
20.1. Outline 59
20.2. Power Supply Circuit 60
20.3. Telephone Line Interface 61
20.4. Transmitter/Receiver 61
20.5. Pulse Dialling 61
21 BLOCK DIAGRAM (HANDSET) 62
22 CIRCUIT OPERATION (HANDSET) 63
22.1. Outline 63
22.2. Power Supply Circuit/Reset Circuit 63
22.3. Charge Circuit 63
22.4. Battery Low/Power Down Detector 63
22.5. Speakerphone 63
23 CIRCUIT OPERATION (CHARGER UNIT) 64
23.1. Power Supply Circuit 64
24 SIGNAL ROUTE 65
25 CPU DATA (BASE UNIT) 66
25.1. IC8 (BBIC) 66
26 CPU DATA (HANDSET) 69
26.1. IC1 (BBIC) 69
27 EEPROM LAYOUT (BASE UNIT) 71
27.1. Scope 71
27.2. Introduction 71
27.3. EEPROM Layout 71
28 EEPROM LAYOUT (HANDSET) 75
28.1. Scope 75
28.2. Introduction 75
28.3. EEPROM contents 75
29 HOW TO REPLACE FLAT PACKAGE IC 78
29.1. Preparation 78
29.2. Procedure 78
29.3. Modification Procedure of Bridge 78
30 CABINET AND ELECTRICAL PARTS LOCATION (BASE UNIT)
79
31 CABINET AND ELECTRICAL PARTS LOCATION (HANDSET)
80
32 CABINET AND ELECTRICAL PARTS LOCATION (CHARGER
UNIT) 81
33 ACCESSORIES AND PACKING MATERIALS 82
33.1. KX-TCD445BXS/BXT/BXF 82
33.2. KX-A144BXS/BXT/BXF 83
34 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES
84
34.1. Base Unit 84
34.2. Handset 84
34.3. Charger Unit 84
35 REPLACEMENT PARTS LIST 85
35.1. Base Unit 85
35.2. Handset 87
35.3. Charger Unit 88
35.4. Accessories and Packing Materials 88
35.5. Fixtures and Tools 88
36 FOR SCHEMATIC DIAGRAM 89
36.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 89
36.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 89
36.3. Charger Unit (SCHEMATIC DIAGRAM (CHARGER UNIT))
89
37 SCHEMATIC DIAGRAM (BASE UNIT) 90
38 SCHEMATIC DIAGRAM (HANDSET) 92
39 SCHEMATIC DIAGRAM (CHARGER UNIT) 94
40 CIRCUIT BOARD (BASE UNIT) 95
40.1. Component View 95
40.2. Flow Solder Side View 96
41 CIRCUIT BOARD (HANDSET) 97
41.1. Component View 97
41.2. Flow Solder Side View 98
42 CIRCUIT BOARD (CHARGER UNIT) 99
42.1. Component View 99
42.2. Flow Solder Side View 99
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

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°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 the 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 sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

1.2. How to recognize that Pb Free solder is used
1.2.1. Base Unit PCB
PbF
IC7
IC8
IC9
144
109
108
1
16 17
32
1
11
37
36
28
18
73 72
Marked
IC4 1
45
8
(Component View)
TP13
TP15
TP8
TP7
TP11
TP106
TP9
TP1
2
4
1
5
6
TP4
TP2
TP3
TP10
TP6
TP202
TP201 TP5
GND MODE SCL
SDA
VDD
J105J102J104J103J101
CHARGE
CHARGE
PbF
Marked
(Flow Solder Side View)
Note:
The locations of the “PbF” mark are subject to change without notice.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

1.2.3. Charger Unit PCB
1.2.2. Handset PCB
PbF
IC1
11 18
281
IC3
100
1
8081
50
51
31
30
Marked
IC2
5
8
4
1
(Component View)
Marked
1
PROG
PbF
BOOK
UP
POWER
CAN
DOWN
RIGHT
REDIAL
LEFT
1
2
36
5
7
0
#
R4
9
8
INT
MIC
TALK 36
CN2
LED101
LED107
LED108
SP_
LED104
LED106
LED105
LED102 LED103
(Flow Solder Side View)
Note:
The locations of the “PbF” mark are subject to change without notice.
(ComponentView) (Flow Solder SideView)
PbF
D1
J1
Marked
PbF
R1 R2
TP4
TP1
TP2
TP3
Marked
Note:
The locations of the “PbF” mark are subject to change without notice.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

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 recommended by the
manufacturer.
Dispose of used batteries according to the manufacture’s Instructions.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

4 BATTERY
4.1. Battery Installation
1. Insert the batteries negative (-) terminal first.
2. Close the battery cover.
Note:
• Use only rechargeable HHR-4EPT (Ni-MH)/P-4NPT (Ni-Cd) batteries.
4.2. Battery Charge
Place the handset on the base unit for about 7 hours before initial use.
When the batteries are fully charged, flashes. When charging, the battery icon is shown as follows.
Note:
• Clean the charge contacts of the handset and base unit with a soft, dry cloth, otherwise the batteries may not charge
properly. Clean if the unit is exposed to grease, dust or high humidity.
• If the handset is turned off, it will be turned on automatically when it is placed on the base unit.
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.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

4.3. Battery Life
After your Panasonic batteries are fully charged, you can expect the following performance:
Note:
• The included batteries are Ni-MH batteries.
• Battery operating time may be shortened depending on usage conditions and ambient temperature.
4.4. Replacing the Batteries
If flashes even when the handset batteries have been fully charged, both batteries must be replaced.
Important:
• Please use only the Panasonic batteries HHR-4EPT (Ni-MH)/P-4NPT (Ni-Cd).
• Use only rechargeable batteries. If you install non-rechargeable batteries and start charging, the batteries may leak
electrolyte.
• Do not mix old and new batteries.
• Use only 2 nickel metal hydride (Ni-MH) batteries or 2 nickel cadmium (Ni-Cd) batteries. Do not mix battery types.
• Ensure that the correct battery type is selected.
1. Press the notch on the cover firmly and slide it in the direction of the arrow.
2. Remove the batteries positive (+) terminal first. Replace both batteries.
Note for Service:
• When Ni-Cd batteries are fitted with the setting in ,icon might disappear and stop
charging even if the handset is on the cradle for avoiding overcharge.
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /

5 LOCATION OF CONTROLS
5.1. Base Unit
5.2. Handset
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KX-TCD445BXS / KX-TCD445BXT / KX-TCD445BXF / KX-A144BXS / KX-A144BXT / KX-A144BXF /