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Panasonic KX-T7453 User Manual

Panasonic KX-T7453
57 pages
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ORDER NO. KMS0104563C1
F5
DIGITAL PROPRIETARY TELEPHONE
KX-T7453 / KX-T7453B
White Version
Black Version
(for U.S.A.)
SPECIFICATIONS
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Panasonic KX-T7453 Specifications

General IconGeneral
DisplayLCD
SpeakerphoneYes
Caller IDYes
Hold FeatureYes
Headset JackYes
Speed DialYes
Ring TonesMultiple
Volume ControlYes
MountingDesk or Wall
CompatibilityPanasonic KX-T series

Summary

SPECIFICATIONS

Station Loop Limit

Specifies the limit for the station loop.

Cabling Method

Details the cabling method used.

Jacks

Lists the types of jacks available.

Display

Describes the display capabilities.

Dimensions

Provides the physical dimensions of the unit.

Weight

States the weight of the unit.

CAUTION

FOR SERVICE TECHNICIANS

LED Exchange Notes

Important considerations for exchanging LEDs on the Dial P.C. Board.

Hook Switch Light Sensitivity

Notes on hook switch operation sensitivity to light and precautions.

LOCATION OF CONTROLS

DISASSEMBLY INSTRUCTIONS

HOW TO REMOVE THE LOWER CABINET

Step-by-step guide to remove the lower cabinet.

HOW TO REMOVE THE HOOK BUTTON

Procedure for removing the hook button.

HOW TO REMOVE THE SWITCH AND MAIN BOARDS

Procedure for removing the switch and main boards.

HOW TO REMOVE THE LCD BOARD

Procedure for removing the LCD board.

IC DATA

IC1

Pin configuration and data for IC1.

BLOCK DIAGRAM

CIRCUIT OPERATIONS

KEY INPUT CONTROL CIRCUIT

Operation of the key input control circuit.

LCD CONTROL CIRCUIT

Operation of the LCD control circuit.

LED CIRCUIT

Operation of the LED circuit.

DATA COMMUNICATION CIRCUIT

Function of the data communication circuit.

RESET CIRCUIT

Operation of the reset circuit.

TONE GENERATION CIRCUIT

Function of the tone generation circuit.

JOG DIAL CIRCUIT

Operation of the jog dial circuit.

HOOK SWITCH CIRCUIT

Operation of the hook switch circuit.

HANDSET CIRCUIT

Transmission and reception signal paths for handset.

SP-PHONE CIRCUIT

Transmission and reception signal paths for speakerphone.

TROUBLESHOOTING GUIDE

NO OPERATION.

Troubleshooting steps for no operation issues.

THE LCD DOES NOT OPERATE.

Troubleshooting steps for LCD not operating.

THE ELECTRONIC VOLUME OF THE SPEAKER-PHONE DOES NOT WORK.

Troubleshooting steps for speaker-phone volume issues.

THE ELECTRONIC VOLUME OF THE HANDSET DOES NOT WORK.

Troubleshooting steps for handset volume issues.

SPEAKER-PHONE TROUBLE.

Troubleshooting steps for speaker-phone issues.

TONE DIAL TROUBLE.

Troubleshooting steps for tone dial issues.

HANDSET TROUBLE.

Troubleshooting steps for handset issues.

HOW TO REPLACE THE FLAT PACKAGE IC

PREPARATION

Preparation steps for replacing flat package ICs.

FLAT PACKAGE IC REMOVE PROCEDURE

Procedure to remove flat package ICs.

FLAT PACKAGE IC INSTALLATION PROCEDURE

Procedure for installing flat package ICs.

BRIDGE MODIFICATION PROCEDURE

Procedure for bridge modification.

WAVEFORM

CABINET AND ELECTRICAL PARTS LOCATION

REPLACEMENT PARTS LIST

CABINET AND ELECTRICAL PARTS

ACCESSORIES AND PACKING MATERIALS

MAIN BOARD PARTS

LCD BOARD PARTS

SWITCH BOARD PARTS

PRINTED CIRCUIT BOARD

SCHEMATIC DIAGRAM

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