KX-MB1900RUB, KX-MB1900RUW - Panasonic Fax Service Manual (repair manual). Page 2

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KX-MB1900RUB/KX-MB1900RUW
TABLE OF CONTENTS
PAGE
PAGE
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 ---------------------------------------6
1.4.1. Precautions to Prevent Damage from
Static Electricity ----------------------------------------6
2 Warning --------------------------------------------------------------7
2.1. About Lead Free Solder (PbF: Pb free) --------------7
2.1.1. Suggested PbF Solder -------------------------------7
2.2. Discarding of P. C. Board --------------------------------8
2.3. Insulation Resistance Test -------------------------------8
2.4. Battery Caution ---------------------------------------------8
2.5. Laser Beam And Fuser Unit Section ------------------8
2.6. Note for Repairing------------------------------------------9
3 Specifications ---------------------------------------------------- 10
4 General/Introduction ------------------------------------------- 10
4.1. Optional Accessories------------------------------------ 10
4.2. Translation Lists ------------------------------------------ 11
4.2.1. Error Message (Display)--------------------------- 11
5 Features ------------------------------------------------------------ 12
5.1. General Features----------------------------------------- 12
5.2. Hardware Requirements for Multi-Function
Software ---------------------------------------------------- 12
6 Technical Descriptions---------------------------------------- 13
6.1. Connection Diagram------------------------------------- 13
6.2. General Block Diagram--------------------------------- 14
6.3. Main Board Section-------------------------------------- 16
6.3.1. Data Flow---------------------------------------------- 16
6.3.2. RTC Backup Circuit--------------------------------- 24
6.4. CIS Control Section-------------------------------------- 25
6.5. Motor Drive Section-------------------------------------- 26
6.5.1. Engine Motor Control Circuit --------------------- 26
6.5.2. Scanner Motor Drive Circuit ---------------------- 27
6.6. Timing chart and wave form of scanner
motors------------------------------------------------------- 30
6.6.1. Normal 1-2 phase excitation (half step)-------- 30
6.6.2. Flat torque 1-2 phase excitation (half step) --- 31
6.6.3. W1-2 phase excitation (Quarter step) ---------- 32
6.6.4. Drive mode of FB------------------------------------ 33
6.7. FAN Motor Section--------------------------------------- 33
6.7.1. General ------------------------------------------------ 33
6.7.2. Circuit Diagram of FAN ---------------------------- 34
6.7.3. Fan Control ------------------------------------------- 34
6.7.4. Control table ------------------------------------------ 35
6.7.5. Waveform---------------------------------------------- 35
6.8. Solenoid Driver Section -------------------------------- 36
6.9. LSU (Laser Scanning Unit) Section ----------------- 37
6.10. Sensors and Switches Section ----------------------- 39
6.10.1. Drum Detection  ------------------------------------- 40
6.10.2. Pickup Sensor---------------------------------------- 40
6.10.3. Exit Sensor-------------------------------------------- 41
6.10.4. Home Sensor----------------------------------------- 41
6.10.5. Registration & Manual Paper Sensor ---------- 42
6.10.6. Print Timing Sensor --------------------------------- 42
6.10.7. Top Cover Sensor ----------------------------------- 43
6.10.8. Toner Sensor.... “Toner Empty”, “Toner
Low”, “Change Drum”------------------------------ 44
6.11. Operation Board Section ------------------------------ 47
6.12. LCD Section----------------------------------------------- 47
6.13. HVPS (High Voltage Power Supply) Section ----- 49
6.13.1. HVPS Specification--------------------------------- 49
6.13.2. CHG-BIAS (Charge BIAS)/GRID/ UNIT------- 49
6.13.3. DEV DC BIAS UNIT-------------------------------- 50
6.13.4. DEV AC BIAS UNIT -------------------------------- 50
6.13.5. TRA (+) BIAS (Transfer (+) BIAS)/TRA (-)
BIAS (Transfer (-) BIAS) UNIT------------------- 50
6.14. Heat Lamp Control Circuit----------------------------- 51
6.15. Main Board Section ------------------------------------- 56
6.16. Power Supply Board Section ------------------------- 59
6.17. Mechanical Operation ---------------------------------- 60
6.17.1. Printing ------------------------------------------------ 60
7 Location of Controls and Components ----------------- 61
7.1. Overview --------------------------------------------------- 61
7.1.1. Front view--------------------------------------------- 61
7.1.2. Rear view --------------------------------------------- 61
7.2. Control Panel --------------------------------------------- 61
8 Installation Instructions -------------------------------------- 62
8.1. Installation ------------------------------------------------- 62
8.1.1. Installation Space ----------------------------------- 62
8.1.2. OUTPUT TRAY-------------------------------------- 63
8.1.3.  RECORDING PAPER----------------------------- 64
8.1.4. Documents the Unit Can Send ------------------ 68
8.1.5. Toner Cartridge and the Drum Cartridge------ 69
8.1.6. Connecting to a computer ------------------------ 73
8.1.7.  Installing Multi-Function Station ---------------- 73
8.2. Connections----------------------------------------------- 75
9 Test Mode --------------------------------------------------------- 76
9.1. Test Functions -------------------------------------------- 76
9.1.1. Button Code Table ---------------------------------- 77
9.1.2. Print Test Pattern------------------------------------ 78
10 Service Mode----------------------------------------------------- 79
10.1. Programming and Lists--------------------------------- 79
10.1.1. Operation --------------------------------------------- 79
10.1.2. Operation Flow -------------------------------------- 79
10.1.3. Service Function Table ---------------------------- 80
10.1.4. Memory Clear Specification ---------------------- 80
10.2. User Mode (The list below is an example of
the SYSTEM SETUP LIST the unit prints out.) -- 81
10.3. History (Example of a printed out list) -------------- 82
10.3.1. Descriptions of The History Report------------- 83
11 Troubleshooting Guide --------------------------------------- 84
11.1. User Recoverable Errors ------------------------------ 84
11.2. Troubleshooting Details -------------------------------- 86
11.2.1. Outline ------------------------------------------------- 86
11.2.2. Starting Troubleshooting -------------------------- 86
11.2.3. Initialization ------------------------------------------- 87
11.2.4. Simple Check List----------------------------------- 88
11.2.5. Simplified Troubleshooting Guide--------------- 89
11.2.6. CALL SERVICE Troubleshooting Guide ------ 92
11.2.7. Print ---------------------------------------------------- 99
11.2.8. Recording Paper Feed ---------------------------105
11.2.9. Initializing Error ------------------------------------- 113
11.2.10. Operation Panel Section ------------------------- 114
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