Panasonic KX-TCD450 Series

Panasonic KX-TCD450 Series

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23 CIRCUIT OPERATION (CHARGER UNIT)

23.1. Power Supply Circuit

The power supply is as shown.

63

KX-TCD450RUM / KX-A145RUM / KX-TCD450RUT / KX-A145RUT

Table of Contents

Default Chapter2
- Table of Contents2
1 ABOUT LEAD FREE SOLDER (Pbf: Pb Free)4
- Suggested Pbf Solder4
- How to Recognize that Pb Free Solder Is Used5
2 For Service Technicians7
3 Caution7
4 Battery8
- Battery Installation8
- Battery Charge8
- Battery Life9
- Replacing the Batteries9
5 Location of Controls10
- Base Unit10
- Handset10
6 Settings11
- Connection11
- Symbols Used in this Service Manual11
- PIN Code12
- Reset14
- Key Lock15
- Recall Feature15
- Dialling Pause for PBX Line/Long Distance Service Users15
- Call Restriction16
- Cancelling Call Restricted Handset(S)16
- Call BAR On/Off (Call Prohibition On/Off)16
- Selecting the Display Language17
- Select Dialling Mode (Tone/Pulse)17
- Select Flash Timing17
- Automatic Route Selection18
- Summary of Programmable Functions19
7 Display20
- Handset Display20
- Before Requesting Help (Troubleshooting)21
8 Operations22
- Power On/Off22
- Making a Call22
- Answering a Call22
- Setting the Clock/Date22
- Phonebook23
9 Disassembly Instructions31
- Base Unit31
- Handset32
- Charger Unit33
10 Assembly Instructions34
- Warning When Constructing the Base Unit34
11 Troubleshooting Guide35
- Check Power36
- Check Battery Charge37
- Check Link38
- Check Handset Transmission40
- Check Handset Reception40
- Check Caller ID40
- Bell Reception41
12 Check Procedure (Base Unit)42
- Preparation42
- PC Setting42
13 Check Procedure (Handset)43
- Preparation43
- PC Setting43
14 Adjustments (Base Unit and Charger Unit)44
- Adjustment (Base Unit)44
- Adjustment Standard (Base Unit)48
- Adjustment (Charger Unit)50
- Adjustment Standard (Charger Unit)50
15 Adjustments (Handset)51
- Adjustment51
- Adjustment Standard (Handset)54
16 Rf Specification55
- Base Unit55
- Handset55
17 How to Check the Handset Speaker55
18 FREQUENCY TABLE (Mhz)56
19 Block Diagram (Base Unit)57
20 Circuit Operation (Base Unit)58
- Outline58
- Power Supply Circuit59
- Telephone Line Interface60
- Transmitter/Receiver60
- Pulse Dialing60
21 Block Diagram (Handset)61
22 Circuit Operation (Handset)62

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