Panasonic KX-T2378JXW User manual

© 2002 Kyushu Matsushita Electric Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-T2378JXW
Intergrated Telephone System
White Version
(for Asia, Middle Near East and Other Areas)
Telephone Equipment
ORDER NO. KM40112760C3

1 LOCATION OF CONTROLS 4
2 DISPLAY 5
3 CONNECTION 6
3.1. Connecting the Handset 6
3.2. Connecting the Telephone Line Cord 6
3.3. Connecting a Communication Device 7
4 SETTINGS 8
4.1. Selecting the Dialing Mode 8
4.2. Time Adjustment 9
4.3. Setting the LCD Contrast 10
4.4. Selecting the Ringer Volume 10
5 SPECIAL FEATURES 11
5.1. FLASH Button 11
5.2. Selecting the Flash Time 11
5.3. Setting the Pin Code 12
5.4. Dial Lock 13
5.5. Call Restriction 14
5.6. How to Release the Establishment of Dial Lock 15
6 DISASSEMBLY INSTRUCTIONS 16
7 TROUBLE SHOOTING GUIDE 17
7.1. Service Hints 17
7.2. Pulse Dialing Problems 17
7.3. Tone Dialing Problems (Handset) 18
7.4. No Ringing Sound When Ring Signal is Input. 18
7.5. In Use LED is Not On 19
7.6. When the both lines are held in the Conference mode;
Line LED are not Green 19
7.7. Does Not Hold 20
8 BLOCK DIAGRAM 21
9 CIRCUIT OPERATION 22
9.1. Reset Circuit 22
9.2. Telephone Line Interface 23
9.3. Ringer Circuit 23
9.4. Tone Detect 23
9.5. In Use Detector Circuit 24
9.6. Hold Circuit 25
9.7. Speakerphone Circuit 26
10 HOW TO SET THE FLASH TIME AND REDIAL TIME 27
10.1. Flash Time 27
10.2. Redial Time 27
11 IC BLOCK DIAGRAM 28
11.1. IC801 28
11.2. Speakerphone IC Data (IC601) 29
11.3. Ringer IC Data (IC1, IC22) 30
12 MODULE BLOCK DIAGRAM 31
12.1. LCD MODULE BLOCK 31
12.2. CONNECTOR PIN ASSIGNMENT 31
13 HOW TO REPLACE FLAT PACKAGE IC 32
13.1. Preparation 32
13.2. Procedure 32
13.3. Modification Procedure of Bridge 32
14 CABINET AND ELECTRICAL PARTS LOCATION 33
15 ACCESSORIES AND PACKING MATERIALS 34
16 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES
35
17 REPLACEMENT PARTS LIST 36
17.1. Base Unit 36
17.2. ACCESSORIES AND PACKING MATERIALS 40
18 FOR SCHEMATIC DIAGRAM (SCHEMATIC DIAGRAM (BASE
UNIT)) 41
19 SCHEMATIC DIAGRAM (BASE UNIT) 42
19.1. Main (Suffix A) 42
19.2. Main (Suffix B) 46
19.3. Operation 50
CONTENTS
Page Page
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KX-T2378JXW

20 CIRCUIT BOARD (BASE UNIT) 51
20.1. Component View (Main (Suffix A)) 51
20.2. Flow Solder Side View (Main (Suffix A)) 52
20.3. Component View (Main (Suffix B)) 53
20.4. Flow Solder Side View (Main (Suffix B)) 54
20.5. Component View (Operation) 55
20.6. Flow Solder Side View (Operation) 56
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KX-T2378JXW

1 LOCATION OF CONTROLS
4
KX-T2378JXW

2 DISPLAY
5
KX-T2378JXW

3 CONNECTION
3.1. Connecting the Handset
Connect the handset as shown below.
•• Use only a Panasonic Handset for the KX-T2378JXW.
3.2. Connecting the Telephone Line Cord
Connect the telephone line cord(s) to the unit as follows.
To connect a two-line telephone jack
To connect two single-line telephone jacks
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KX-T2378JXW

If you use the unit only as a single-line telephone
3.3. Connecting a Communication Device
After connecting the telephone line cord to a two-line telephone jack, you can connect a communication device (computer,
modem, fax, answering machine, etc.) through this unit using the LINE2/DATA jack.
•• If the LINE2/DATA indicator lights red, the communication device is in use. Use LINE1 to make or answer other calls. Otherwise
the communication device may not operate properly.
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4 SETTINGS
4.1. Selecting the Dialing Mode
You can select the dialing mode by programming. If you have touch tone service, set to "Tone". If rotary or pulse service is used,
set to "Pulse". Your phone comes from the factory set to "Tone".
Make sure that a call is not put on hold.
8
KX-T2378JXW

4.2. Time Adjustment
You can select AM/PM or 24-hour clock by programming.
Make sure that a call is not put on hold.
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KX-T2378JXW

4.3. Setting the LCD Contrast
You can select the LCD contrast level from 1 to 4 by programming. Your phone comes from the factory set to 3.
Make sure that a call is not put on hold.
4.4. Selecting the Ringer Volume
You can select the ringer volume of each line to HIGH, LOW or OFF. Your phone comes from the factory set to HIGH.
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KX-T2378JXW

5 SPECIAL FEATURES
5.1. FLASH Button
5.2. Selecting the Flash Time
The flash time depends on your telephone exchange or host PBX. You can select the following flash times: "80, 90, 100, 110,
200, 250, 300, 400, 600, 700 ms (milliseconds)". Your phone comes from the factory set to "600 ms".
Make sure that a call is not put on hold.
•• If you are connected via a PBX, a longer flash time may be necessary to use PBX functions (transferring a call, etc.). Consult
your PBX installer for the correct setting.
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KX-T2378JXW

5.3. Setting the Pin Code
A 4-digit PIN Code (Personal Identification Number) prevents unauthorized persons from using your unit. The PIN Code is
required for the dial lock and call restriction to be set or canceled. The factory preset PIN code is "1111".
Make sure that a call is not put on hold.
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5.4. Dial Lock
You can prevent others from making a call to any number except the one pre-programmed in the memory of the EMERGENCY
button. Once you locked the dialing buttons, even emergency numbers cannot be dialed. Only incoming calls are accepted until
the dial lock is canceled.
Before using this feature, we recommend storing an emergency number in the memory of the EMERGENCY button. Even if the
dialing buttons are locked, the number stored in the button can be dialed.
•• If you choose not to program emergency numbers, but plan to use the dial lock, any number programmed into the
EMERGENCY button can be accessed.
5.4.1. To Set the Dial Lock
5.4.2. To Cancel the Dial Lock
Follow steps 1 through 3 above again.
•• ““ will disappear, and the unit will return to the standby mode.
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5.5. Call Restriction
You can prevent the unit from dialing phone numbers beginning with specified digit(s) (1 digit or 2 digits). Phone numbers with
the restricted leading digits cannot be dialed out.
5.5.1. To Set the Call Restriction
Make sure that a call is not put on hold.
•• If your unit is connected to a PBX, this function may not operate. Contact your PBX supplier for more information.
5.5.2. To Cancel the Call Restriction
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KX-T2378JXW

5.6. How to Release the Establishment of Dial Lock
After this procedure, you will be able to establish a new password.
How to release the establishment of dial lock.
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KX-T2378JXW

6 DISASSEMBLY INSTRUCTIONS
Shown in Fig —. To remove —. Remove —.
1Lower Cabinet Screws (2.6 × 12).................................(A) × 5
2Main P. C. Board The Main P.C. Board
Battery Box The Battery Box
3Operational P.C. Board Screws (2.6 × 8)....................................(B) × 5
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KX-T2378JXW

7 TROUBLE SHOOTING GUIDE
7.1. Service Hints
SYMPTOM CURE
Dead Check IC801, X801, X802
Can’t hear the voice from handset. Check Q109, Q405, Q406.
No voice transmit. Check Q421, Q424, Q108.
Can’t tone dial. Check IC801, R445, R444, R443, C436.
Can’t pulse dial Check Q101, Q103, Q104.
Can’t auto redial Check IC201, Q201.
No rings. Check D1, IC1 and SW1 (Line1), D21, IC22 and SW21 (Line 2).
can’t speak with the speakerphone. Check IC601.
Can’t hold. Check SW510, Q501, Q551.
Can’t speak with the handset. Check handset jack
Can’t speak with the headset. Check headset jack
Can’t change the volume for speakerphone. Check IC801, IC601
Can’t change the volume for handset. Check IC801, Q405
No volume handset or speakerphone. Check IC801, Q108, Q401.
7.2. Pulse Dialing Problems
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7.3. Tone Dialing Problems (Handset)
7.4. No Ringing Sound When Ring Signal is Input.
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KX-T2378JXW

7.5. In Use LED is Not On
7.6. When the both lines are held in the Conference mode; Line LED are
not Green
19
KX-T2378JXW

7.7. Does Not Hold
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KX-T2378JXW