Read Panasonic KX-UT248RU / KX-UT248RU-B (serv.man3) Service Manual online
2
KX-UT248RU/KX-UT248RU-B
TABLE OF CONTENTS
PAGE
PAGE
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
2.2. Discarding of P. C. Board --------------------------------4
3 Specifications ------------------------------------------------------5
4 Technical Descriptions------------------------------------------6
4 Technical Descriptions------------------------------------------6
4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operations ------------------------------------------7
4.2. Circuit Operations ------------------------------------------7
4.2.1. LCD / BACKLIGHT Circuit --------------------------7
4.2.2. Reset Circuit --------------------------------------------7
4.2.3. Ethernet Circuit ----------------------------------------8
4.2.4. Analog Circuit ------------------------------------------9
4.2.5. ASIC (IC204) ----------------------------------------- 12
4.2.6. Key Circuit--------------------------------------------- 13
4.2.7. LED Circuit -------------------------------------------- 14
4.2.8. EHS Circuit-------------------------------------------- 15
4.2.9. Power Supply Circuit ------------------------------- 16
4.2.2. Reset Circuit --------------------------------------------7
4.2.3. Ethernet Circuit ----------------------------------------8
4.2.4. Analog Circuit ------------------------------------------9
4.2.5. ASIC (IC204) ----------------------------------------- 12
4.2.6. Key Circuit--------------------------------------------- 13
4.2.7. LED Circuit -------------------------------------------- 14
4.2.8. EHS Circuit-------------------------------------------- 15
4.2.9. Power Supply Circuit ------------------------------- 16
5 Location of Controls and Components------------------ 19
5.1. Name and Locations ------------------------------------ 19
6 Installation Instructions--------------------------------------- 21
6.1. Connections ----------------------------------------------- 21
7 Test Mode---------------------------------------------------------- 23
7.1. Peer to Peer Test Mode -------------------------------- 23
7.1.1. Preparation-------------------------------------------- 23
7.1.2. Connection for Test --------------------------------- 24
7.1.3. Communication Test -------------------------------- 24
7.1.4. Quit peer to peer Test mode ---------------------- 24
7.1.2. Connection for Test --------------------------------- 24
7.1.3. Communication Test -------------------------------- 24
7.1.4. Quit peer to peer Test mode ---------------------- 24
7.2. KEYs and LEDs Test mode---------------------------- 25
7.2.1. Preparation-------------------------------------------- 25
7.2.2. KEYs and LEDs Test ------------------------------- 25
7.2.3. Quit KEYs and LEDs Test mode----------------- 25
7.2.2. KEYs and LEDs Test ------------------------------- 25
7.2.3. Quit KEYs and LEDs Test mode----------------- 25
8 Service Mode ----------------------------------------------------- 26
8.1. Factory Setting-------------------------------------------- 26
8.1.1. How to Clear User Setting ------------------------ 26
8.2. How to Change MAC Address Label---------------- 26
8.2.1. Replacing Main P.C.B. ----------------------------- 26
8.2.2. Attaching MAC Address Label ------------------- 27
8.2.2. Attaching MAC Address Label ------------------- 27
9 Troubleshooting Guide---------------------------------------- 28
9.1. No Operation ---------------------------------------------- 28
9.1.1. Power ON Error-------------------------------------- 28
9.1.2. Power Supply : AC adaptor ----------------------- 28
9.1.3. Power Supply : PoE -------------------------------- 29
9.1.2. Power Supply : AC adaptor ----------------------- 28
9.1.3. Power Supply : PoE -------------------------------- 29
9.2. LCD Does Not work ------------------------------------- 38
9.3. ASIC Does Not work ------------------------------------ 39
9.3. ASIC Does Not work ------------------------------------ 39
9.3.1. ASIC Data Error ------------------------------------- 39
9.4. Handset Does Not work -------------------------------- 40
9.4.1. Receive ------------------------------------------------ 40
9.4.2. Send ---------------------------------------------------- 40
9.4.2. Send ---------------------------------------------------- 40
9.5. Headset Does Not work -------------------------------- 41
9.5.1. Receive ------------------------------------------------ 41
9.5.2. Send ---------------------------------------------------- 41
9.5.2. Send ---------------------------------------------------- 41
9.6. Speaker-Phone Does Not work----------------------- 42
9.6.1. Receive ------------------------------------------------ 42
9.6.2. Send ---------------------------------------------------- 43
9.6.2. Send ---------------------------------------------------- 43
9.7. Ethernet Does Not work -------------------------------- 44
9.7.1. ETHERNET Data Error ---------------------------- 44
9.7.2. LAN port----------------------------------------------- 45
9.7.3. PC port ------------------------------------------------ 45
9.7.3. PC port ------------------------------------------------ 45
9.8. LED Does Not Light------------------------------------- 46
9.9. EHS Does Not work------------------------------------- 47
9.9. EHS Does Not work------------------------------------- 47
9.10. BT module Does Not work ---------------------------- 48
10 Disassmbly and Assembly Instructions ---------------- 49
10.1. Remove Main Board and Ope Board--------------- 49
10.2. Remove and Assembly for LCD -------------------- 51
10.3. Installation of MAIN PCB ASSY---------------------- 52
10.2. Remove and Assembly for LCD -------------------- 51
10.3. Installation of MAIN PCB ASSY---------------------- 52
11 Maintenance------------------------------------------------------ 53
11.1. Terminal Guide of the ICs Transistors and
Diodes ------------------------------------------------------ 53
11.1.1. Main Board ------------------------------------------- 53
11.1.2. Ope Board -------------------------------------------- 54
11.1.2. Ope Board -------------------------------------------- 54
11.2. How To Replace a Flat Package IC----------------- 55
11.2.1. Preparation ------------------------------------------- 55
11.2.2. Removal Procedure -------------------------------- 55
11.2.3. Procedure--------------------------------------------- 55
11.2.4. Removing Solder From Between Pins--------- 55
11.2.2. Removal Procedure -------------------------------- 55
11.2.3. Procedure--------------------------------------------- 55
11.2.4. Removing Solder From Between Pins--------- 55
12 Schematic Diagram -------------------------------------------- 56
12.1. Main Board No.1----------------------------------------- 56
12.2. Main Board No.2----------------------------------------- 60
12.3. Main Board No.3----------------------------------------- 62
12.4. Main Board No.4----------------------------------------- 64
12.5. Ope Board------------------------------------------------- 66
12.6. Back Light Board ---------------------------------------- 68
12.7. Waveform-------------------------------------------------- 69
12.2. Main Board No.2----------------------------------------- 60
12.3. Main Board No.3----------------------------------------- 62
12.4. Main Board No.4----------------------------------------- 64
12.5. Ope Board------------------------------------------------- 66
12.6. Back Light Board ---------------------------------------- 68
12.7. Waveform-------------------------------------------------- 69
12.7.1. No.(1)-(6)---------------------------------------------- 69
12.7.2. No.(7)-(12) ------------------------------------------- 70
12.7.3. No.(13)-(16) ------------------------------------------ 71
12.7.4. No.(17)-(20) ------------------------------------------ 72
12.7.5. No.(21)-(25) ------------------------------------------ 73
12.7.6. No.(26)-(28) ------------------------------------------ 74
12.7.2. No.(7)-(12) ------------------------------------------- 70
12.7.3. No.(13)-(16) ------------------------------------------ 71
12.7.4. No.(17)-(20) ------------------------------------------ 72
12.7.5. No.(21)-(25) ------------------------------------------ 73
12.7.6. No.(26)-(28) ------------------------------------------ 74
13 Printed Circuit Board------------------------------------------ 75
13.1. Main Board ------------------------------------------------ 75
13.1.1. Component View------------------------------------ 75
13.1.2. Bottom View------------------------------------------ 76
13.1.2. Bottom View------------------------------------------ 76
13.2. Ope Board------------------------------------------------- 77
13.2.1. Component View------------------------------------ 77
13.2.2. Bottom View------------------------------------------ 78
13.2.2. Bottom View------------------------------------------ 78
13.3. Back Light Board----------------------------------------- 79
13.3.1. Component View------------------------------------ 79
14 Appendix Information of Schematic Diagram -------- 80
15 Exploded View and Replacement Parts List----------- 81
15 Exploded View and Replacement Parts List----------- 81
15.1. IC Data ----------------------------------------------------- 81
15.1.1. IC503--------------------------------------------------- 81
15.1.2. IC204--------------------------------------------------- 86
15.1.3. IC401--------------------------------------------------- 87
15.1.4. IC103--------------------------------------------------- 90
15.1.2. IC204--------------------------------------------------- 86
15.1.3. IC401--------------------------------------------------- 87
15.1.4. IC103--------------------------------------------------- 90
15.2. Cabinet and Electric Parts----------------------------- 92
15.3. Accessories and Packing Materials----------------- 93
15.4. Replacement Parts List -------------------------------- 94
15.3. Accessories and Packing Materials----------------- 93
15.4. Replacement Parts List -------------------------------- 94
15.4.1. Cabinet and Electrical Parts---------------------- 94
15.4.2. Accessories and Packing Materials ------------ 94
15.4.3. Main Board Parts ----------------------------------- 95
15.4.4. OPE Board Parts------------------------------------ 99
15.4.5. Back Light Board-----------------------------------101
15.4.2. Accessories and Packing Materials ------------ 94
15.4.3. Main Board Parts ----------------------------------- 95
15.4.4. OPE Board Parts------------------------------------ 99
15.4.5. Back Light Board-----------------------------------101
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