Panasonic KX-TG1283BXS User manual

© 2007 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation o law.
KX-TG1283BXS
KX-TG1283BXT
KX-TCA122CXS
KX-TCA122CXT
KX-TCA121CXS
KX-TCA121CXT
Digital Cordless Answering System
Silver Version
Titanium Black Version
( or Middle Near East and A rica)
Telephone Equipment
ORDER NO. KM40701268CE

1 ABOUT LEAD F EE SOLDE (PbF: Pb free) 4
1.1. Suggested PbF Solder 4
2 FO SE VICE TECHNICIANS 5
3 CAUTION 5
4 OPE ATING INST UCTIONS 6
4.1. To Use the Unit in the Event o a Power Failure 6
4.2. Battery 6
4.3. Location o Controls 9
4.4. Connections 10
4.5. Guide to Settings 11
4.6. Registering a Handset to a Base Unit 13
4.7. Copying Phonebook Entries 14
4.8. For Service Hint 14
5 DISASSEMBLY INST UCTIONS 15
5.1. Base Unit 15
5.2. Handset 16
5.3. Charger Unit 17
6 HOW TO EPLACE THE HANDSET LCD 18
7 T OUBLESHOOTING FLOWCHA T 19
7.1. Check Power 20
7.2. Check Battery Charge 21
7.3. Check Link 22
7.4. Check Handset Transmission 26
7.5. Check Handset Reception 26
7.6. Check Caller ID 26
7.7. Check Base Speakerphone Transmission 26
7.8. Check Base Speakerphone Reception 26
7.9. Bell Reception 27
7.10. Check TAM Operation 27
8 T OUBLESHOOTING BY SYMPTOM (BASE UNIT AND
CHA GE UNIT) 28
8.1. Check Point (Base Unit) 28
8.2. The Setting Method o JIG (Base Unit) 33
8.3. Adjustment Standard (Base Unit) 35
8.4. Check Point (Charger Unit) 36
8.5. Adjustment Standard (Charger Unit) 36
9 T OUBLESHOOTING BY SYMPTOM (HANDSET) 37
9.1. Check Point (Handset) 37
9.2. Troubleshooting or Speakerphone (Handset) 40
9.3. The Setting Method o JIG (Handset) 41
9.4. Adjustment Standard (Handset) 43
10 THINGS TO DO AFTE EPLACING IC 44
10.1. Base Unit 44
10.2. Handset 44
11 F SPECIFICATION 45
11.1. Base Unit 45
11.2. Handset 45
12 HOW TO CHECK THE SPEAKE O ECEIVE 46
13 F EQUENCY TABLE (MHz) 46
14 BLOCK DIAG AM (BASE UNIT) 47
15 CI CUIT OPE ATION (BASE UNIT) 48
15.1. Outline 48
15.2. Power Supply Circuit 49
15.3. Telephone Line Inter ace 50
15.4. Transmitter/Receiver 50
15.5. Pulse Dialling 50
16 BLOCK DIAG AM (HANDSET) 51
17 CI CUIT OPE ATION (HANDSET) 52
17.1. Outline 52
17.2. Power Supply Circuit/Reset Circuit 52
17.3. Charge Circuit 52
17.4. Battery Low/Power Down Detector 52
17.5. Speakerphone 52
18 CI CUIT OPE ATION (CHA GE UNIT) 53
18.1. Power Supply Circuit 53
19 SIGNAL OUTE 54
20 CPU DATA (BASE UNIT) 56
20.1. IC4 (BBIC) 56
21 CPU DATA (HANDSET) 59
21.1. IC1 (BBIC) 59
22 ENGINEE ING MODE 61
22.1. Base Unit 61
22.2. Handset 64
22.3. Copying Phonebook Items when Repairing 67
Note:
Because section 4 o this manual is an extract rom the operating instructions or 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-TG1283BXS / KX-TG1283B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

22.4. How to Clear User Setting 69
23 HOW TO EPLACE THE FLAT PACKAGE IC 70
23.1. Preparation 70
23.2. How to Remove the IC 70
23.3. How to Install the IC 71
23.4. How to Remove a Solder Bridge 71
24 CABINET AND ELECT ICAL PA TS (BASE UNIT) 72
25 CABINET AND ELECT ICAL PA TS (HANDSET) 73
26 CABINET AND ELECT ICAL PA TS (CHA GE UNIT) 74
27 ACCESSO IES AND PACKING MATE IALS 75
27.1. KX-TG1283BXS/BXT 75
27.2. KX-TCA121CXS/CXT 76
28 TE MINAL GUIDE OF THE ICs, T ANSISTO S AND DIODES
77
28.1. Base Unit 77
28.2. Handset 77
28.3. Charger Unit 78
29 EPLACEMENT PA TS LIST 79
29.1. Base Unit 79
29.2. Handset 82
29.3. Charger Unit 83
29.4. Accessories and Packing Materials 84
29.5. Screws 84
29.6. Fixtures and Tools 84
30 FO SCHEMATIC DIAG AM 85
30.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT_MAIN))
85
30.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 85
30.3. Charger Unit (SCHEMATIC DIAGRAM (CHARGER UNIT))
85
31 SCHEMATIC DIAG AM (BASE UNIT_MAIN) 86
32 SCHEMATIC DIAG AM (BASE UNIT_OPE ATION) 88
33 SCHEMATIC DIAG AM (HANDSET) 90
34 SCHEMATIC DIAG AM (CHA GE UNIT) 92
35 CI CUIT BOA D (BASE UNIT_MAIN) 93
35.1. Component View 93
35.2. Flow Solder Side View 94
36 CI CUIT BOA D (BASE UNIT_OPE ATION) 95
36.1. Component View 95
36.2. Flow Solder Side View 96
37 CI CUIT BOA D (HANDSET) 97
37.1. Component View 97
37.2. Flow Solder Side View 98
38 CI CUIT BOA D (CHA GE UNIT) 99
38.1. Component View 99
38.2. Flow Solder Side View 99
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

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).
• • •
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB or too long time in order to prevent solder splash or damage to the PCB.
• • •
• PbF solder will tend to splash i it is heated much higher than its melting point, approximately 1100°F (600°C).
• • •
• 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-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

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 and ground them.
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-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4 OPE ATING INST UCTIONS
4.1. To Use the Unit in the Event of a Power Failure
The included battery box unctions as an emergency power source or Panasonic cordless phones in the event o a power ailure.
4.2. Battery
4.2.1. Battery Installation for Battery Box
This battery box can provide 6 V o emergency power supplied by standard 4 alkaline batteries o AA (LR6) size.
Important:
• • •
• Use alkaline batteries. Operating time when using non-alkaline batteries will be dramatically shortened.
• • •
• Do not use rechargeable batteries or battery box.
Battery caution for battery box
• • •
• The batteries should be used correctly, otherwise the battery box may be damaged due to battery leakage.
• • •
• Do not mix old, new or di erent types o batteries.
• • •
• Do not charge, short-circuit, disassemble, or heat the batteries.
• • •
• Do not dispose o batteries in a ire.
• • •
• Do not use rechargeable batteries, such as nickel-cadmium (Ni-Cd) or nickel-metal hydride (Ni-MH) batteries.
• • •
• It is recommended that batteries are replaced annually.
• • •
• It is recommended that batteries are replaced a ter a power outage.
• • •
• Operating time may be shortened depending on usage conditions, ambient temperature, and battery quality.
Battery life for battery box
During a power ailure, the ollowing per ormance will be available.
Alkaline batteries
Operation Operating Time
While in use (talking) 6 hours max.
While not in use (standby) 13 hours max.
Note:
• • •
• The operating time depends on the type o batteries.
• • •
• Do not charge the handset in the event o a power ailure. Operating time will be shortened.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.2.2. Battery Installation for handset
4.2.3. Battery Charge
Place the handset on the base unit or charger for about 7 hours before initial use.
When charging, the battery icon is shown as ollows. When the batteries are ully charged, remains on the display.
Note:
• • •
• It is normal or the handset to eel warm during charging.
• • •
• It takes 7 hours to ully charge the batteries, however, you can use the handset be ore the batteries are ully charged.
• • •
• Clean the charge contacts o the handset and base unit with a so t, dry cloth, otherwise the batteries may not charge
properly. Clean i the unit is exposed to grease, dust or high humidity.
• • •
• When lashes, recharge the handset batteries. will continue to lash until the batteries have been charged or at
least 15 minutes.
• • •
• I the handset is turned o , it will be turned on automatically when it is placed on the base unit.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.2.4. Battery Life
A ter your Panasonic batteries are ully charged, you can expect the ollowing per ormance:
Ni-MH batteries (700 mAh)
Operation Operating Time
While in use (talking) 20 hours max.
While not in use (standby) 170 hours max.
Note:
• • •
• Actual battery per ormance depends on a combination o how o ten the handset is in use (talking) and how o ten it is not
in use (standby).
• • •
• Battery operating time may be shortened over time depending on usage conditions and ambient temperature.
4.2.5. Battery eplacement
I lashes even a ter the handset batteries have been charged or 7 hours, the batteries must be replaced.
Important:
• • •
• We recommend the use o Panasonic rechargeable Ni-MH batteries HHR-4EPT. I you install non-rechargeable batteries
and start charging, the batteries may leak electrolyte.
• • •
• Do not mix old and new batteries.
• • •
• Wipe the battery ends ( ,) with a dry cloth.
• • •
• When installing the batteries, avoid touching the battery ends ( ,) or the unit contacts.
1. Press the notch on the handset cover irmly and slide it in the direction o the arrow.
2. Remove the old batteries positive ( ) end irst and install the new ones.
See For Service Hint (P.14)
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.3. Location of Controls
4.3.1. Base Unit
4.3.2. Handset
Note:
• • •
• Up to 3 menu items can be displayed at a time. To select a menu item not shown on the current page, scroll up or down
by pressing the navigator key, or , respectively.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.4. Connections
4.4.1. Base Unit
When the AC adaptor is connected, a short beep will be heard. I it is not heard, check the connections.
Important:
• • •
• Use only the AC adaptor PQLV19BXY and telephone line cord supplied with this unit.
Note:
• • •
• A ter connection, you must charge the batteries to make or answer calls with the handset.
• • •
• Never install telephone wiring during a lightning storm.
• • •
• The AC adaptor must remain connected at all times. (It is normal or the adaptor to eel warm during use.)
• • •
• The AC adaptor should be connected to a vertically oriented or loor-mounted AC outlet. Do not connect the AC adaptor to
a ceiling-mounted AC outlet, as the weight o the adaptor may cause it to become disconnected.
4.4.2. Charger Unit
Important:
• • •
• Use only the AC adaptor PQLV200BXY.
Note:
• • •
• The AC adaptor must remain connected at all times (It is normal or the adaptor to eel warm during use).
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.5. Guide to Settings
For your re erence, a chart o all items which can be customised or the base unit and the handset is printed below.
• • •
• These items are customised using the handset.
• • •
• When customising the base unit and the handset, the current item or setting is indicated .
4.5.1. Base Unit Settings
• • •
• These items are customised using the handset.
*1 The item will not be reset when pressing , , and key o the handset. Re er to How to Clear User Setting (P.69).
*2 I you orget your PIN, see For Service Hint (P.14).
Note:
• • •
• Up to 3 menu items can be displayed at a time. To select a menu item not shown on the current page, scroll up or down
by pressing the navigator key, or , respectively.
4.5.2. Answering System Settings
I the base unit is reset to its de ault settings, the ollowing answering system related settings will be reset.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.5.3. Handset Settings
*1 The item will not be reset when pressing , , and keys. Re er to How to Clear User Setting (P.69).
*2 The item will not be reset when pressing , , and keys. Re er to How to Clear User Setting (P.69).
*3 The items are not shown on the display.
*4 I you orget your PIN, see For Service Hint (P.14).
*5 Here, only the case that a handset is registered to a maximum o 4 Base units is mentioned.
Note:
• • •
• Up to 3 menu items can be displayed at a time. To select a menu item not shown on the current page, scroll up or down
by pressing the navigator key, or , respectively.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.6. egistering a Handset to a Base Unit
4.6.1. Cancelling a Handset
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.6.2. Cancelling a Base Unit
4.7. Copying Phonebook Entries
4.7.1. Copying Handset Phonebook Entries to Other Handset
4.7.2. Copying Handset Phonebook Entries to the Shared Phonebook
4.8. For Service Hint
Items Contents
Battery You could use other rechargeable batteries sold in a market, but the unit is not guaranteed to work properly.
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.
PIN Code I you orget Base Unit or Handset PIN code, press *, 7, 0, 0, 0 as a PIN code. This is called “super password”
and is e ective when you have orgotten the PIN code.
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

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 Tapes and Solders
3Main P.C.Board Cable
Main P.C.Board
Cabinet Body Screws (2.6 × 14)..........(B) × 6
4Operational P.C.Board Clear Grille
Screws (2.6 × 8).............(C ) × 4
Operational P.C.Board
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

5.2. Handset
Shown in Fig.- To Remove Remove
5Cabinet Cover Screws (2 × 10)..........(D) × 2
6Follow the procedure.
7Main P.C.Board Screw (2 × 10)............(E ) × 1
Screws (2 × 10)..........(F) × 2
Tapes and Solders
Main P.C.Board
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

5.3. Charger Unit
Shown in Fig.- To Remove Remove
8Cabinet Cover Screws (2.6 × 10)..........(G) × 2
9Main P.C.Board Solders
Main P.C.Board
17
KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

6 HOW TO EPLACE THE HANDSET LCD
18
KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

Cross eference:
Check Power (P.20)
Bell eception (P.27)
Check Battery Charge (P.21)
Check Link (P.22)
Check Handset Transmission (P.26)
Check Handset eception (P.26)
SIGNAL OUTE (P.54)
Check Caller ID (P.26)
Check Base Speakerphone Transmission (P.26)
Check Base Speakerphone eception (P.26)
Check TAM Operation (P.27)
7 T OUBLESHOOTING FLOWCHA T
Flow Chart
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

7.1. Check Power
7.1.1. Base Unit
Is the AC Adaptor inserted into AC outlet? (Check AC Adaptor’s speci ication.)
Cross eference:
Power Supply Circuit (P.49)
7.1.2. Handset
Cross eference:
Power Supply Circuit/ eset Circuit (P.52)
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KX-TG1283BXS / KX-TG1283BXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT