KX-A406CE, KX-A406UK, KX-A406AL - Panasonic PBX Service Manual (repair manual). Page 2

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1 Safety Precautions -----------------------------------------------3

1.1. For Service Technicians ----------------------------------3

2 Warning --------------------------------------------------------------3

2.1. About Lead Free Solder (PbF: Pb free) --------------3

2.1.1. Suggested PbF Solder -------------------------------4
2.1.2. Information for Users on Collection and

Disposal of Old Equipment and used
Batteries -------------------------------------------------4

2.2. Discarding of P. C. Board --------------------------------4

3 Specifications ------------------------------------------------------5
4 Technical Descriptions------------------------------------------6

4.1. Block Diagram (Main) -------------------------------------6
4.2. Block Diagram (RF Part) ---------------------------------6
4.3. Circuit Operation -------------------------------------------7

4.3.1. BBIC (Base Band IC: IC501) -----------------------7
4.3.2. EEPROM (IC611) -------------------------------------7
4.3.3. Power Supply Circuit ---------------------------------8
4.3.4. RF Signal Route ---------------------------------------8

5 Location of Controls and Components--------------------9
6 Installation Instructions-----------------------------------------9

6.1. Registering a Repeater -----------------------------------9
6.2. Deregistering a Repeater --------------------------------9

7 Troubleshooting Guide---------------------------------------- 10

7.1. Flow Chart ------------------------------------------------- 10

7.1.1. Flow Chart--------------------------------------------- 10
7.1.2. Check Table for repeater operation ------------- 11

7.2. Check Power ---------------------------------------------- 12
7.3. Check Link ------------------------------------------------- 13
7.4. Check the RF part---------------------------------------- 14

8 Disassembly and Assembly Instructions --------------- 15

8.1. Disassembly Instructions------------------------------- 15

9 Measurements and Adjustments -------------------------- 16

9.1. Equipment Required------------------------------------- 16
9.2. The Setting Method of JIG ----------------------------- 16

9.2.1. Connections ------------------------------------------ 16
9.2.2. Commands -------------------------------------------- 17

9.3. Adjustment Standard  ----------------------------------- 18

9.3.1. Bottom View ------------------------------------------ 18

9.4. Clock adjustment after crystal replacement ------- 19
9.5. Frequency Table------------------------------------------ 19

10 Miscellaneous ---------------------------------------------------- 20

10.1. How to Replace the Flat Package IC --------------- 20

10.1.1. Preparation-------------------------------------------- 20
10.1.2. How to Remove the IC ----------------------------- 20
10.1.3. How to Install the IC -------------------------------- 20
10.1.4. How to Remove a Solder Bridge ---------------- 20

10.2. How to Replace the LLP (Leadless Leadframe

Package) IC and IC ground plate -------------------- 21

10.2.1. Preparation-------------------------------------------- 21
10.2.2. Caution------------------------------------------------- 21
10.2.3. How to Remove the IC ----------------------------- 21
10.2.4. How to Install the IC -------------------------------- 21
10.2.5. How to Remove a Solder Bridge (Doesn't

apply to IC ground plate.) ------------------------- 22

10.3. Terminal Guide of the ICs, Transistors and

Diodes------------------------------------------------------- 23

11 Schematic Diagram--------------------------------------------- 24

11.1. For Schematic Diagram -------------------------------- 24

11.2. Schematic Diagram  ------------------------------------ 25

12 Printed Circuit Board------------------------------------------ 26

12.1. Component View----------------------------------------- 26
12.2. Bottom View----------------------------------------------- 26

13 Exploded View and Replacement Parts List----------- 27

13.1. Cabinet and Electrical Parts -------------------------- 27
13.2. Accessories and Packing Materials ----------------- 28
13.3. Replacement Parts List -------------------------------- 29

13.3.1. Cabinet and Electrical Parts  --------------------- 29
13.3.2. Accessories and Packing Materials ------------ 29
13.3.3. Main P.C. Board Parts ----------------------------- 29
13.3.4. Fixtures and Tools ---------------------------------- 30