KX-NT700RU - Panasonic PBX Service Manual (repair manual). Page 2

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

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

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

2.1. Battery Caution ---------------------------------------------3
2.2. Caution--------------------------------------------------------3
2.3. About Lead Free Solder (PbF: Pb free) --------------3

2.3.1. Suggested PbF Solder -------------------------------4

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

3 Specifications ------------------------------------------------------5

3.1. General Descriptions--------------------------------------5

4 Technical Descriptions------------------------------------------6

4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operations ------------------------------------------7

4.2.1. Power Supply Circuit ---------------------------------7
4.2.2. Reset Circuit --------------------------------------------8
4.2.3. Ethernet Circuit ----------------------------------------8
4.2.4. TELEPHONE LINE -----------------------------------9
4.2.5. Key Input Control Circuit (PANEL BOARD)--- 11
4.2.6. SIGNAL ROUTE------------------------------------- 12

5 Location of Controls and Components------------------ 20

5.1. Main View -------------------------------------------------- 20
5.2. Control Panel---------------------------------------------- 21

6 Installation Instructions--------------------------------------- 22

6.1. Basic Connections --------------------------------------- 22

7 Troubleshooting Guide---------------------------------------- 23

7.1. Troubleshooting Flowchart----------------------------- 23
7.2. Maintenance Mode -------------------------------------- 25

7.2.1. Display Test ------------------------------------------- 25
7.2.2. Key Test------------------------------------------------ 29
7.2.3. Hardware Test---------------------------------------- 30
7.2.4. Beamforming Test ----------------------------------- 31
7.2.5. Mic Line Test------------------------------------------ 32

7.3. Port Output------------------------------------------------- 34
7.4. No Operation ---------------------------------------------- 35

7.4.1. Power Supply: AC adaptor------------------------ 35
7.4.2. Power Supply: PoE Hub --------------------------- 35

7.5. LCD Trouble ----------------------------------------------- 37
7.6. Speaker and Microphone Trouble-------------------- 38

7.6.1. SP Phone Reception (from LAN, TEL, or

Audio to Speaker) ----------------------------------- 38

7.6.2. SP Phone Transmission (form MIC to

LAN, TEL, or Audio) -------------------------------- 38

7.7. LAN port Trouble ----------------------------------------- 41
7.8. USB port Trouble----------------------------------------- 42
7.9. SD CARD Trouble --------------------------------------- 42

7.10. TEL Line Trouble ----------------------------------------- 43

7.10.1. No Dial Tone ------------------------------------------ 43
7.10.2. No Ringing Tone ------------------------------------- 43
7.10.3. Cannot send DTMF DIALING -------------------- 44

7.11. External Microphone Trouble ------------------------- 45

7.11.1. EXT MIC1 Transmission--------------------------- 45
7.11.2. EXT MIC2 Transmission--------------------------- 45

8 Disassembly Instructions ------------------------------------ 46

8.1. Disassembly Instructions------------------------------- 46

8.1.1. How To Remove Cabinet Cover. [No.1]

(Procedures No.1)----------------------------------- 46

8.1.2. How To Remove Main Board. [No.2]

(Procedures No.1ÆNo.2) ------------------------- 46

8.1.3. How To Remove Panel Board. [No.3]

(Procedures No.1ÆNo.2ÆNo.3) --------------- 47

8.1.4. How To Remove Speaker. [No.4]

(Procedures No.1ÆNo.2ÆNo.3ÆNo.4)  ----- 48

8.1.5. How To Remove Mic. [No.5] (Procedures

No.1ÆNo.5) ------------------------------------------ 48

8.1.6. How To Remove LED LENS. [No.6]

(Procedures No.1ÆNo.2ÆNo.6) --------------- 49

9 Maintenance------------------------------------------------------ 50

9.1. Terminal Guide of ICS, Transistors and

Diodes ------------------------------------------------------ 50

9.2. How To Replace a Flat Package IC----------------- 51

9.2.1. Preparation ------------------------------------------- 51
9.2.2. Removal Procedure -------------------------------- 51
9.2.3. Procedure--------------------------------------------- 52
9.2.4. Removing Solder From Between Pins--------- 52

10 Schematic Diagram -------------------------------------------- 53

10.1. Block Diagram -------------------------------------------- 53
10.2. Schematic Diagram ------------------------------------- 54

10.2.1. Main Board ------------------------------------------- 54
10.2.2. Panel Board ------------------------------------------ 72

10.3. Waveform-------------------------------------------------- 74

11 Printed Circuit Board------------------------------------------ 79

11.1. Main Board ------------------------------------------------ 79

11.1.1. Component View------------------------------------ 79
11.1.2. Flow Solder Side View----------------------------- 80

11.2. Panel Board----------------------------------------------- 81

11.2.1. Component View------------------------------------ 81
11.2.2. Flow Solder Side View----------------------------- 81

12 Appendix Information of Schematic Diagram -------- 82
13 Exploded View and Replacement Parts List----------- 83

13.1. Cabinet and Electric Parts----------------------------- 83
13.2. Accessories and Packing Materials----------------- 84
13.3. Replacement Parts List -------------------------------- 85

13.3.1. Cabinet and Electrical Parts---------------------- 85
13.3.2. Accessories and Packing Materials ------------ 85
13.3.3. Main Board Parts ----------------------------------- 85
13.3.4. Panel Board Parts ---------------------------------- 95