KX-FC968RU - Panasonic Fax Service Manual (repair manual). Page 2

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1 Safety Precautions -----------------------------------------------5

1.1. For Service Technicians ----------------------------------5
1.2. AC Caution---------------------------------------------------5
1.3. Personal Safety Precautions ----------------------------6

1.3.1. Moving Sections of the Unit-------------------------6
1.3.2. Live Electrical Sections ------------------------------6

1.4. Service Precautions ---------------------------------------7

1.4.1. Precautions to Prevent Damage from

Static Electricity ----------------------------------------7

2 Warning --------------------------------------------------------------8

2.1. About Lead Free Solder (PbF: Pb free) --------------8

2.1.1. Suggested PbF Solder -------------------------------8

2.2. Discarding of P. C. Board --------------------------------8
2.3. Insulation Resistance Test -------------------------------9
2.4. Battery Caution ---------------------------------------------9

3 Specifications ---------------------------------------------------- 10

3.1. Base Unit --------------------------------------------------- 10
3.2. Cordless Handset ---------------------------------------- 11

4 General/Introduction ------------------------------------------- 12

4.1. Optional Accessories------------------------------------ 12
4.2. Translation Lists ------------------------------------------ 13

4.2.1. Base Unit ---------------------------------------------- 13
4.2.2. Cordless Handset ----------------------------------- 13

5 Features ------------------------------------------------------------ 14
6 Technical Descriptions---------------------------------------- 15

6.1. Connection Diagram------------------------------------- 15
6.2. General Block --------------------------------------------- 16

6.2.1. General Block Diagram ---------------------------- 17

6.3. Control (Facsimile) Section---------------------------- 18

6.3.1. ASIC (IC10) ------------------------------------------- 18
6.3.2. Flash Memory (IC16) ------------------------------- 18
6.3.3. Dynamic RAM (IC17)------------------------------- 18
6.3.4. Reset Circuit (Watch Dog Timer) ---------------- 19
6.3.5. Supervision Circuit for the Terminal Head

Temperature ------------------------------------------ 20

6.4. Facsimile Section ---------------------------------------- 21

6.4.1. Image Data Flow During Facsimile

Operation ---------------------------------------------- 21

6.4.2. Block Diagram---------------------------------------- 22
6.4.3. Thermal Head ---------------------------------------- 23
6.4.4. Scanning Block -------------------------------------- 25
6.4.5. Stepping Motor Drive Circuit---------------------- 26

6.5. Sensor and Switches------------------------------------ 28

6.5.1. Document Top Sensor (SW338)----------------- 29
6.5.2. Document Set Sensor (SW339) ----------------- 29
6.5.3. Cover Open Sensor / Paper Sensor

(SW102) ----------------------------------------------- 30

6.5.4. Jam Sensor (SW101) ------------------------------ 30
6.5.5. Cutter Position Sensor ----------------------------- 31
6.5.6. Motor Position Sensor------------------------------ 31

6.6. Modem Section ------------------------------------------- 32

6.6.1. Function------------------------------------------------ 32
6.6.2. Modem Circuit Operation-------------------------- 38

6.7. NCU Section----------------------------------------------- 39

6.7.1. General ------------------------------------------------ 39
6.7.2. Bell Detection Circuit  ------------------------------ 39
6.7.3. On/Off Hook Circuit --------------------------------- 39
6.7.4. Pulse Dial Circuit ------------------------------------ 39

6.7.5. Line Amplifier and Side Tone Circuit ----------- 39
6.7.6. Calling Line Identification Circuit

(RUSSIAN) ------------------------------------------- 40

6.7.7. Calling Line Identification Circuit (Western) -- 40

6.8. ITS (Integrated Telephone System) and

Monitor Section ------------------------------------------ 42

6.8.1. Speakerphone Circuit ------------------------------ 42

6.9. Transmitter / Receiver (Cordless) ------------------- 42

6.9.1. Transmitter Block ----------------------------------- 42
6.9.2. Receiver Block--------------------------------------- 42

6.10. Operation Board Section ------------------------------ 43

6.11. LCD Section----------------------------------------------- 44

6.12. Power Supply Board Section ------------------------- 45
6.13. Cordless Handset---------------------------------------- 48

6.13.1. Block Diagram --------------------------------------- 48
6.13.2. Circuit Operation (Cordless Handset) --------- 49
6.13.3. Circuit Operation (Charger Unit) ---------------- 50

7 Location of Controls and Components ----------------- 51

7.1. Overview --------------------------------------------------- 51

7.1.1. Base Unit---------------------------------------------- 51
7.1.2. Cordless Handset----------------------------------- 51

7.2. Control Panel --------------------------------------------- 52

7.2.1. Base Unit---------------------------------------------- 52
7.2.2. Cordless Handset----------------------------------- 52

8 Installation Instructions -------------------------------------- 54

8.1. Installation Space ---------------------------------------- 54
8.2. Connections----------------------------------------------- 54

8.2.1. Base Unit---------------------------------------------- 54

8.3. Battery Charge ------------------------------------------- 55
8.4. Recording Paper ----------------------------------------- 56
8.5. Documents the Unit can send ------------------------ 57
8.6. Battery Installation/Replacement -------------------- 58

9 Operating Instructions---------------------------------------- 58

9.1. Setting Your Logo---------------------------------------- 58
9.2. Cordless Handset Programming--------------------- 59

9.2.1. Cordless Handset Features ---------------------- 59

9.3. Registering a Cordless Handset to a Base

Unit ---------------------------------------------------------- 60

9.3.1. Cancelling a Cordless Handset ----------------- 60

9.4. For Service Hint ------------------------------------------ 61

10 Test Mode --------------------------------------------------------- 62

10.1. Facsimile Section---------------------------------------- 62

10.1.1. Button Code Table ---------------------------------- 63
10.1.2. Print Test Pattern------------------------------------ 63

11 Service Mode----------------------------------------------------- 64

11.1. Base Unit -------------------------------------------------- 64

11.1.1. Programming and Lists---------------------------- 64

11.2. Cordless Handset---------------------------------------- 68
11.3. The Example of the Printed List --------------------- 70

11.3.1. User Mode  ------------------------------------------- 70
11.3.2. Service Mode Settings ---------------------------- 71
11.3.3. History ------------------------------------------------- 72

11.4. Descriptions of the History Report ------------------ 73

12 Troubleshooting Guide --------------------------------------- 74

12.1. Troubleshooting Summary ---------------------------- 74

12.1.1. Precautions------------------------------------------- 74

12.2. Error Messages-Display ------------------------------- 75

12.2.1. Base Unit---------------------------------------------- 75