Panasonic KX-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS Service Manual ▷ View online
KX-TCD420RUM
KX-TCD420RUS
KX-A142RUM
KX-A142RUS
Digital Cordless Answering System
Metalic Gray Version
Silver Version
(for Russia)
Silver Version
(for Russia)
Telephone Equipment
ORDER NO. KM40306120C3
1 ABOUT LEAD FREE SOLDER (PbF: Pb free)
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1.1. Suggested PbF Solder
4
1.2. Howto recognize that Pb Free solder is used
5
2 FOR SERVICE TECHNICIANS
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3 CAUTION
7
4 BATTERY
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4.1. Battery Installation
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4.2. Battery Charge
8
4.3. Battery Life
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4.4. Replacing the Batteries
9
5 LOCATION OF CONTROLS
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5.1. Base Unit
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5.2. Handset
10
6 SETTINGS
11
6.1. Connection
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6.2. Symbols Used in This Service Manual
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6.3. PIN Code
12
6.4. Reset
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6.5. Key Lock
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6.6. Recall Feature
15
6.7. Dialling Pause for PBX line/long distance service users 15
6.8. Call Restriction
6.8. Call Restriction
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6.9. Cancelling Call Restricted Handset(s)
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6.10. Call BAR On/Off (Call Prohibition On/Off)
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6.11. Selecting the Display Language
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6.12. Select Dialling Mode (Tone/Pulse)
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6.13. Select Flash Timing
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6.14. Automatic Route Selection
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6.15. Summary of Programmable Functions
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7 DISPLAY
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7.1. Handset Display
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7.2. Before Requesting Help (Troubleshooting)
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8 OPERATIONS
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8.1. Power On/Off
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8.2. Making a Call
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8.3. Answering a Call
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8.4. Setting the Clock/Date
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8.5. Phonebook
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9 DISASSEMBLY INSTRUCTIONS
28
9.1. Base Unit
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9.2. Handset
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9.3. Charger Unit
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10 ASSEMBLY INSTRUCTIONS
31
10.1. Warning When Constructing the Base Unit
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11 TROUBLESHOOTING GUIDE
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11.1. Check Power
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11.2. Check Battery Charge
34
11.3. Check Link
35
11.4. Check Handset Transmission
37
11.5. Check Handset Reception
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11.6. Check Caller ID
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11.7. TAM Voice Prompt Problems
38
11.8. Bell Reception
39
12 CHECK PROCEDURE (BASE UNIT)
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12.1. Preparation
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12.2. PC Setting
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12.3. TAM Voice Prompt Download
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13 CHECK PROCEDURE (HANDSET)
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13.1. Preparation
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13.2. PC Setting
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14 ADJUSTMENTS (BASE UNIT AND CHARGER UNIT)
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14.1. Adjustment (Base Unit)
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14.2. Adjustment Standard (Base Unit)
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14.3. Adjustment (Charger Unit)
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14.4. Adjustment Standard (Charger Unit)
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15 ADJUSTMENTS (HANDSET)
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15.1. Adjustment
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15.2. Adjustment Standard (Handset)
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16 RF SPECIFICATION
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16.1. Base Unit
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16.2. Handset
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17 HOW TO CHECK THE HANDSET SPEAKER
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18 FREQUENCY TABLE (MHz)
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19 BLOCK DIAGRAM (BASE UNIT)
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20 CIRCUIT OPERATION (BASE UNIT)
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20.1. Outline
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20.2. Power Supply Circuit
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20.3. Telephone Line Interface
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20.4. Transmitter/Receiver
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20.5. Pulse Dialing
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CONTENTS
Page
Page
2
KX-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS
21 BLOCK DIAGRAM (HANDSET)
59
22 CIRCUIT OPERATION (HANDSET)
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22.1. Outline
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22.2. Power Supply Circuit/Reset Circuit
60
22.3. Charge Circuit
60
22.4. Battery Low/Power Down Detector
60
23 CIRCUIT OPERATION (CHARGER UNIT)
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23.1. Power Supply Circuit
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24 SIGNAL ROUTE
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25 CPU DATA (BASE UNIT)
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25.1. IC8 (BBIC)
62
26 CPU DATA (HANDSET)
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26.1. IC1 (BBIC)
65
27 EEPROM LAYOUT (BASE UNIT)
67
27.1. Scope
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27.2. Introduction
67
27.3. EEPROM Layout
67
28 EEPROM LAYOUT (HANDSET)
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28.1. Scope
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28.2. Introduction
71
28.3. EEPROM contents
71
29 HOW TO REPLACE FLAT PACKAGE IC
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29.1. Preparation
74
29.2. Procedure
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29.3. Modification Procedure of Bridge
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30 CABINET AND ELECTRICAL PARTS LOCATION (BASE UNIT)
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31 CABINET AND ELECTRICAL PARTS LOCATION (HANDSET) 76
32 CABINET AND ELECTRICAL PARTS LOCATION (CHARGER
UNIT)
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33 ACCESSORIES AND PACKING MATERIALS
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33.1. KX-TCD420RUM/RUS
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33.2. KX-A142RUM/RUS
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34 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES
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34.1. Base Unit
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34.2. Handset
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34.3. Charger Unit
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35 REPLACEMENT PARTS LIST
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35.1. Base Unit
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35.2. Handset
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35.3. Charger Unit
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35.4. Accessories and Packing Materials
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35.5. Fixtures and Tools
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35.6. Memo
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36 SCHEMATIC DIAGRAM (BASE UNIT)
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37 SCHEMATIC DIAGRAM (HANDSET)
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38 SCHEMATIC DIAGRAM (CHARGER UNIT)
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39 CIRCUIT BOARD (BASE UNIT)
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39.1. Component View
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39.2. FlowSolder Side View
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40 CIRCUIT BOARD (HANDSET)
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40.1. Component View
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40.2. FlowSolder Side View
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41 CIRCUIT BOARD (CHARGER UNIT)
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41.1. Component View
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41.2. FlowSolder Side View
95
3
KX-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS
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.
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.
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.
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).
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 manufac
turers 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.
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufac
turers 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-TCD420RUM / KX-TCD420RUS / KX-A142RUM / KX-A142RUS
