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Panasonic KX-TCD420BXM

Panasonic KX-TCD420BXM
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ORDER NO. KM40308169C8
Telephone Equipment
KX-TCD420BXM / KX-A142EXM / KX-TCD420BXS / KX-
A142EXS
Digital Cordless Answering System
Metalic Gray Version
Silver Version
(for Asia, Eastern Europe and Other areas)
SPECIFICATIONS
1
www.freeservicemanuals.info
1/2/2015
Digitized in Heiloo, Holland
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Panasonic KX-TCD420BXM Specifications

General IconGeneral
Number of Handsets1
Caller IDYes
DisplayLCD
Battery TypeNi-MH
Talk TimeUp to 10 hours
Remote AccessYes
Call ScreeningYes
TypeAnswering Machine
Phonebook Capacity50 entries
SpeakerphoneYes
Power SourceAC adapter

Summary

SPECIFICATIONS

WARNING

Warning about unauthorized copying and distribution being a violation of law.

1. ABOUT LEAD FREE SOLDER (PbF: Pb free)

2. FOR SERVICE TECHNICIANS

3. CAUTION

Caution regarding battery replacement and disposal.

4. BATTERY

6. SETTINGS

6.3.3. Reset Base Unit PIN to Default (0000)

Procedure to reset the base unit PIN to default.

7. DISPLAY

7.2. Before Requesting Help (Troubleshooting)

Steps to take before contacting customer support for issues.

11. TROUBLESHOOTING GUIDE

11.1. Check Power

Procedure to check the base unit's power supply.

11.1.2. Handset

Procedure to check the handset's power supply.

11.2.2. Handset

Procedure to check the handset's battery charge circuit.

11.3.2. Handset

Procedure to check the handset link.

11.2. Check Battery Charge

Procedure to check the base unit's battery charge circuit.

11.2.3. Charger Unit

Procedure to check the charger unit's power supply.

11.4. Check Handset Transmission

How to check the handset's transmission.

11.3. Check Link

Procedure to check the link between base unit and handset.

11.5. Check Handset Reception

How to check the handset's reception.

12. CHECK PROCEDURE (BASE UNIT)

13. CHECK PROCEDURE (HANDSET)

14. ADJUSTMENTS (BASE UNIT AND CHARGER UNIT)

14.1. Adjustment (Base Unit)

Adjustment procedures for the base unit after part replacement.

2.65 V Supply Confirmation

Confirming the 2.65V supply voltage.

Hookswitch Check with DC Characteristics

Checking hookswitch operation and DC characteristics.

Modulatoin Check and Adjustment

Checking and adjusting modulation parameters.

Receive Audio Check and Adjustment

Checking and adjusting receive audio levels.

Transmit Audio Check and Adjustment

Checking and adjusting transmit audio levels.

14.3. Adjustment (Charger Unit)

Adjustment procedure for the charger unit.

DTMF Generator Confirmation

Confirming the DTMF generator output.

Charging Check

Checking the charging circuit operation.

14.4. Adjustment Standard (Charger Unit)

Standard procedures for connecting equipment for charger unit adjustments.

BBIC Clock Adjustment

Adjusting the BBIC clock frequency.

14.2. Adjustment Standard (Base Unit)

15. ADJUSTMENTS (HANDSET)

4.0 V Supply Confirmation

Confirming the 4.0V supply voltage on the handset.

Timing Confirmation

Confirming timing accuracy on the handset.

15.1. Adjustment

Adjustment procedures for the handset after part replacement.

Battery Monitor Confirmation

Confirming battery monitor function.

Modulatoin Check and Adjusment

Checking and adjusting modulation on the handset.

Transmit Audio Check and Confirmation

Checking and confirming transmit audio on the handset.

VBACK Status Confirmation

Confirming the VBACK status voltage on the handset.

Frequency Offset Confirmation

Confirming frequency offset on the handset.

RSSI Level Confirmation

Confirming RSSI level on the handset.

Battery low Confirmation

Confirming battery low indication.

BBIC Confirmation

Confirming the BBIC checksum on the handset.

Sensitivity Receiver Confirmation

Confirming receiver sensitivity on the handset.

BBIC Clock Adjusment

Adjusting the BBIC clock on the handset.

Receive Audio Check and Confirmation

Checking and confirming receive audio on the handset.

Transmitted Power Confirmation

Confirming transmitted power on the handset.

Charge Detection (OFF) Confirmation

Confirming charge detection status.

16. RF SPECIFICATION

17. HOW TO CHECK THE HANDSET SPEAKER

29. HOW TO REPLACE FLAT PACKAGE IC

35. REPLACEMENT PARTS LIST

36. SCHEMATIC DIAGRAM (BASE UNIT)

37. SCHEMATIC DIAGRAM (HANDSET)

38. SCHEMATIC DIAGRAM (CHARGER UNIT)

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