Panasonic KX-TG1233BXT User manual

© 2006 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-TG1233BXS
KX-TG1233BXT
KX-TCA122CXS
KX-TCA122CXT
KX-TCA121CXS
KX-TCA121CXT
Digital Cordless Answering System
Silver Version
Titanium Black Version
(for Middle Near East and Africa)
Telephone Equipment
ORDER NO. KM40612258CE

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 5
3 CAUTION 5
4 OPERATING INSTRUCTIONS 6
4.1. Battery 6
4.2. Location of Controls 8
4.3. Connections 9
4.4. Guide to Settings 10
4.5. Registering a Handset to a Base Unit 12
4.6. Copying Phonebook Entries 13
4.7. For Service Hint 13
5 DISASSEMBLY INSTRUCTIONS 14
5.1. Base Unit 14
5.2. Handset 15
5.3. Charger Unit 16
6 HOW TO REPLACE THE HANDSET LCD 17
7 TROUBLESHOOTING FLOWCHART 18
7.1. Check Power 19
7.2. Check Battery Charge 20
7.3. Check Link 21
7.4. Check Handset Transmission 25
7.5. Check Handset Reception 25
7.6. Check Caller ID 25
7.7. Check Base Speakerphone Transmission 25
7.8. Check Base Speakerphone Reception 25
7.9. Bell Reception 26
7.10. Check TAM Operation 26
8 TROUBLESHOOTING BY SYMPTOM (BASE UNIT AND
CHARGER UNIT) 27
8.1. Check Point (Base Unit) 27
8.2. The Setting Method of JIG (Base Unit) 32
8.3. Adjustment Standard (Base Unit) 34
8.4. Check Point (Charger Unit) 35
8.5. Adjustment Standard (Charger Unit) 35
9 TROUBLESHOOTING BY SYMPTOM (HANDSET) 36
9.1. Check Point (Handset) 36
9.2. Troubleshooting for Speakerphone (Handset) 39
9.3. The Setting Method of JIG (Handset) 40
9.4. Adjustment Standard (Handset) 42
10 THINGS TO DO AFTER REPLACING IC 43
10.1. Base Unit 43
10.2. Handset 43
11 RF SPECIFICATION 44
11.1. Base Unit 44
11.2. Handset 44
12 HOW TO CHECK THE SPEAKER OR RECEIVER 45
13 FREQUENCY TABLE (MHz) 45
14 BLOCK DIAGRAM (BASE UNIT) 46
15 CIRCUIT OPERATION (BASE UNIT) 47
15.1. Outline 47
15.2. Power Supply Circuit 48
15.3. Telephone Line Interface 49
15.4. Transmitter/Receiver 49
15.5. Pulse Dialling 49
16 BLOCK DIAGRAM (HANDSET) 50
17 CIRCUIT OPERATION (HANDSET) 51
17.1. Outline 51
17.2. Power Supply Circuit/Reset Circuit 51
17.3. Charge Circuit 51
17.4. Battery Low/Power Down Detector 51
17.5. Speakerphone 51
18 CIRCUIT OPERATION (CHARGER UNIT) 52
18.1. Power Supply Circuit 52
19 SIGNAL ROUTE 53
20 CPU DATA (BASE UNIT) 55
20.1. IC4 (BBIC) 55
21 CPU DATA (HANDSET) 58
21.1. IC1 (BBIC) 58
22 ENGINEERING MODE 60
22.1. Base Unit 60
22.2. Handset 63
22.3. Copying Phonebook Items When Repairing 66
Note:
Because section 4 of this manual is an extract from the operating instructions for this model, it is subject to change without notice.
You can download and refer to the original operating instructions on TSN Server for further information.
CONTENTS
Page Page
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

22.4. How to Clear User Setting 68
23 HOW TO REPLACE THE FLAT PACKAGE IC 69
23.1. Preparation 69
23.2. How to Remove the IC 69
23.3. How to Install the IC 70
23.4. How to Remove a Solder Bridge 70
24 CABINET AND ELECTRICAL PARTS (BASE UNIT) 71
25 CABINET AND ELECTRICAL PARTS (HANDSET) 72
26 CABINET AND ELECTRICAL PARTS (CHARGER UNIT) 73
27 ACCESSORIES AND PACKING MATERIALS 74
27.1. KX-TG1233BXS/BXT 74
27.2. KX-TCA121CXS/CXT 75
28 TERMINAL GUIDE OF THE ICs, TRANSISTORS AND DIODES
76
28.1. Base Unit 76
28.2. Handset 76
28.3. Charger Unit 77
29 REPLACEMENT PARTS LIST 78
29.1. Base Unit 78
29.2. Handset 81
29.3. Charger Unit 82
29.4. Accessories and Packing Materials 83
29.5. Fixtures and Tools 83
30 FOR SCHEMATIC DIAGRAM 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 DIAGRAM (BASE UNIT_MAIN) 86
32 SCHEMATIC DIAGRAM (BASE UNIT_OPERATION) 88
33 SCHEMATIC DIAGRAM (HANDSET) 90
34 SCHEMATIC DIAGRAM (CHARGER UNIT) 92
35 CIRCUIT BOARD (BASE UNIT_MAIN) 93
35.1. Component View 93
35.2. Flow Solder Side View 94
36 CIRCUIT BOARD (BASE UNIT_OPERATION) 95
36.1. Component View 95
36.2. Flow Solder Side View 96
37 CIRCUIT BOARD (HANDSET) 97
37.1. Component View 97
37.2. Flow Solder Side View 98
38 CIRCUIT BOARD (CHARGER UNIT) 99
38.1. Component View 99
38.2. Flow Solder Side View 99
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

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).
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if 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 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-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

1.2. How to recognize that Pb Free solder is used
(Example: Handset P.C.B.)
C66
A201
ANT
R59
C54 C55
C45
R54
R55
C46 C47
R62
Q5 Q9
J3
TP22
CHG CHG
TP23
J2
UTX URX
J4
C58
C97
C102
C68 C37 C91
R85
C6
C19
R19
R82
C82
SP_TEST1
REV_TEST1
REV_TEST2
SP_TEST2
C60
C59
C123
C64
C61 C65
C44 C62
CLK
C63
D1
R93
C119
R6
R47 R46 R86
R25 R29
C10
C101
C107
C108
C111 C112
F1
J1
C3
R1
R83
R43 C98
L9
L7
L6
C95
C78 C79
VDD3
D7
D6
D9
Q8
D10
C40
R5
L5
L4
R74
C80
R36
C76
C16
C92
R80
C13
C83
C69 C70
C81
C86 C15
R35 R67 R66
C14 R34 C75
C38 C77
R61
R71
R40
R39
R64
D5
D8
D4
R60
JTAG
R97
R63
VDD1
VDD2POWER
R91
C93
C41
C4
C94
C22
C72
R15
R57
R96
C116
C117
C122
C113
C24
R68
C100
C20
C7
R21 R20
BAT GND
C57
C1
C53
CN6
C51
C50
C48C49
C67
B
17
26
10
1
C84
R75
PbF
IC1
IC3
IC2
X1
C21
R90
C18
C96
R92
R72
C99
C23
R87
R7
C114
R94
C120
C115
C71
R89
R88
C39
R26
C90
C103
R38
R37
C17
C109
C87
C12
L1
R12
R81
C118
C104
C5
C8
Q4
Q11
Q2
Q3
Q10
Q1
Q7
PQUP11278Z
1
1
1
8
8
4
4
5
5
20
80
61
60 41
21
40
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 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 fingers.
3 CAUTION
1. Danger of explosion if battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manufacturer.
3. Dispose of used batteries according to the manufacture’s Instructions.
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4 OPERATING INSTRUCTIONS
4.1. Battery
4.1.1. Battery Installation
4.1.2. 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 follows. When the batteries are fully charged, remains on the display.
Note:
• It is normal for the handset to feel warm during charging.
• It takes 7 hours to fully charge the batteries, however, you can use the handset before the batteries are fully charged.
• 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.
• When flashes, recharge the handset batteries. will continue to flash until the batteries have been charged for at
least 15 minutes.
• If the handset is turned off, it will be turned on automatically when it is placed on the base unit.
• The handset display may show “Please Wait...” when the handset is placed on the charger if it is not registered to a base
unit.
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.1.3. Battery Life
After your Panasonic batteries are fully charged, you can expect the following performance:
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 performance depends on a combination of how often the handset is in use (talking) and how often it is not
in use (standby).
• Battery operating time may be shortened over time depending on usage conditions and ambient temperature.
4.1.4. Battery Replacement
If flashes even after the handset batteries have been charged for 7 hours, the batteries must be replaced.
Important:
• We recommend the use of Panasonic rechargeable Ni-MH batteries HHR-4EPT. If 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 firmly and slide it in the direction of the arrow.
2. Remove the old batteries positive ( ) end first and install the new ones.
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.2. Location of Controls
4.2.1. Base Unit
4.2.2. 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-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.3. Connections
4.3.1. Base Unit
When the AC adaptor is connected, a short beep will be heard. If it is not heard, check the connections.
Important:
• Use only the AC adaptor PQLV19BXY and telephone line cord supplied with this unit.
Note:
• After 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 for the adaptor to feel warm during use.)
• The AC adaptor should be connected to a vertically oriented or floor-mounted AC outlet. Do not connect the AC adaptor to
a ceiling-mounted AC outlet, as the weight of the adaptor may cause it to become disconnected.
4.3.2. Charger Unit
Important:
• Use only the AC adaptor PQLV200BXY.
Note:
• The AC adaptor must remain connected at all times (It is normal for the adaptor to feel warm during use).
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.4. Guide to Settings
For your reference, a chart of all items which can be customised for 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 .
4.4.1. Base Unit Settings
• These items are customised using the handset.
*1 The item will not be reset when pressing , , and key of the handset. Refer to How to Clear User Setting (P.68).
*2 If you forget your PIN, see For Service Hint (P.13).
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.
4.4.2. Answering System Settings
If the base unit is reset to its default settings, the following answering system related settings will be reset.
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.4.3. Handset Settings
*1 The item will not be reset when pressing , , and keys. Refer to How to Clear User Setting (P.68).
*2 The item will not be reset when pressing , , and keys. Refer to How to Clear User Setting (P.68).
*3 The items are not shown on the display.
*4 If you forget your PIN, see For Service Hint (P.13).
*5 Here, only the case that a handset is registered to a maximum of 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.
11
KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.5. Registering a Handset to a Base Unit
4.5.1. Cancelling a Handset
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

4.5.2. Cancelling a Base Unit
4.6. Copying Phonebook Entries
4.6.1. Copying Handset Phonebook Entries to Other Handset
4.6.2. Copying Handset Phonebook Entries to the Shared Phonebook
4.7. 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 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.
PIN Code If you forget Base Unit or Handset PIN code, press *, 7, 0, 0, 0 as a PIN code. This is called “super password”
and is effective when you have forgotten the PIN code.
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

5 DISASSEMBLY INSTRUCTIONS
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
14
KX-TG1233BXS / KX-TG1233B XT / 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
15
KX-TG1233BXS / KX-TG1233B XT / 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
16
KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

6 HOW TO REPLACE THE HANDSET LCD
17
KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

Cross Reference:
Check Power (P.19)
Bell Reception (P.26)
Check Battery Charge (P.20)
Check Link (P.21)
Check Handset Transmission (P.25)
Check Handset Reception (P.25)
SIGNAL ROUTE (P.53)
Check Base Speakerphone Transmission (P.25)
Check Base Speakerphone Reception (P.25)
Check TAM Operation (P.26)
7 TROUBLESHOOTING FLOWCHART
Flow Chart
18
KX-TG1233BXS / KX-TG1233B XT / 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 specification.)
Cross Reference:
Power Supply Circuit (P.48)
7.1.2. Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.51)
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT

7.2. Check Battery Charge
7.2.1. Base Unit
Cross Reference:
Charge Circuit (P.51)
7.2.2. Handset
Cross Reference:
Check Power (P.19)
Charge Circuit (P.51)
7.2.3. Charger Unit
Cross Reference:
Charge Circuit (P.51)
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KX-TG1233BXS / KX-TG1233B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT