KX-MB283RU, KX-MB783RU - Panasonic Fax Service Manual (repair manual). Page 2

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1 Safety Precautions -----------------------------------------------4

1.1. FOR SERVICE TECHNICIANS ------------------------4
1.2. AC CAUTION -----------------------------------------------4
1.3. PERSONAL SAFETY PRECAUTIONS --------------5
1.4. SERVICE PRECAUTIONS ------------------------------5

2 Warning --------------------------------------------------------------6

2.1. ABOUT LEAD FREE SOLDER (PbF: Pb free) -----6
2.2. Discarding of P. C. Board --------------------------------7
2.3. INSULATION RESISTANCE TEST--------------------7
2.4. BATTERY CAUTION --------------------------------------7
2.5. LASER BEAM AND FUSER UNIT SECTION ------7

3 Specifications ------------------------------------------------------8
4 General/Introduction ---------------------------------------------9

4.1. OPTIONAL ACCESSORIES ----------------------------9
4.2. TRANSLATION LISTS ------------------------------------9
4.3. ERROR MESSAGE ------------------------------------- 10

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
6.4. NCU SECTION (KX-MB783RU ONLY)------------- 28
6.5. ITS (Integrated telephone System) and

MONITOR SECTION (KX-MB783RU ONLY) ----- 29

6.6. CIS CONTROL SECTION ----------------------------- 30
6.7. MOTOR DRIVE SECTION----------------------------- 31
6.8. TIMING CHART AND WAVE FORM OF

SCANNER MOTORS ----------------------------------- 35

6.9. FAN MOTOR SECTION -------------------------------- 38

6.10. SOLENOID DRIVER SECTION ---------------------- 40

6.11. LSU (Laser Scanning Unit) SECTION -------------- 41

6.12. SENSORS AND SWITCHES SECTION ----------- 43
6.13. OPERATION BOARD SECTION--------------------- 51
6.14. LCD SECTION-------------------------------------------- 53
6.15. HVPS (High Voltage Power Supply)

SECTION--------------------------------------------------- 54

6.16. HEAT LAMP CONTROL CIRCUIT------------------- 56
6.17. Main Board Section-------------------------------------- 61
6.18. POWER SUPPLY BOARD SECTION -------------- 64
6.19. Mechanical Operation----------------------------------- 65

7 Location of Controls and Components------------------ 67

7.1. OVERVIEW------------------------------------------------ 67
7.2. CONTROL PANEL--------------------------------------- 68

8 Installation Instructions--------------------------------------- 69

8.1. INSTALLATION ------------------------------------------- 69
8.2. CONNECTIONS------------------------------------------ 80

9 Operating Instructions ---------------------------------------- 82

9.1.  YOUR LOGO (KX-MB783RU ONLY) -------------- 82

10 Test Mode---------------------------------------------------------- 84

10.1. TEST FUNCTIONS -------------------------------------- 84

11 Service Mode ----------------------------------------------------- 88

11.1. PROGRAMMING AND LISTS ------------------------ 88
11.2. USER MODE (The list below is an example of

the SYSTEM SETUP LIST the unit prints out.)--- 92

11.3. SERVICE MODE SETTINGS (Example of a

printed out list)-------------------------------------------- 94

11.4. HISTORY -------------------------------------------------- 95

12 Troubleshooting Guide --------------------------------------- 98

12.1. USER RECOVERABLE ERRORS ------------------ 98
12.2. REMOTE PROGRAMMING (KX-MB783RU

ONLY) -----------------------------------------------------100

12.3. TROUBLESHOOTING DETAILS -------------------107
12.4. DOCUMENT JAMS (AUTO DOCUMENT

FEEDER) -------------------------------------------------189

12.5. RECORDING PAPER JAM --------------------------191

13 Service Fixture & Tools-------------------------------------- 199
14 Disassembly and Assembly Instructions -------------200

14.1. ADF SECTION ------------------------------------------201
14.2. REMOVE ADF SECTION (1)------------------------202
14.3. REMOVE ADF SECTION  ---------------------------203
14.4. REMOVE TOP COVER SECTION-----------------204
14.5. REMOVE SCANNER GLASS SECTION---------205
14.6. REMOVE OPERATION PANEL SECTION ------206
14.7. LEFT SIDE SECTION ---------------------------------207
14.8. REMOVE MAIN BOARD -----------------------------207
14.9. REMOVE GEAR CHASSIS SECTION------------208

14.10. REMOVE PAPER FEED ROLLER -----------------209

14.11. RIGHT SIDE SECTION -------------------------------209

14.12. REMOVE RIGHT SIDE COVER SECTION------210
14.13. LOWER SIDE CABINET SECTION --------------- 211
14.14. REMOVE RIGHT CASSETTE GUIDE ------------212
14.15. REMOVE PICK UP BOARD -------------------------212
14.16. REMOVE HIGH VOLTAGE POWER BOARD--- 213
14.17. REMOVE PICK UP ROLLER UNIT----------------214
14.18. REMOVE LOW VOLTAGE POWER BOARD --- 215
14.19. REMOVE FUSER UNIT-------------------------------216
14.20. Installation Position of The Lead-------------------- 217

15 Maintenance-----------------------------------------------------223

15.1. MAINTENANCE ITEMS AND COMPONENT

LOCATIONS ---------------------------------------------223

15.2. MAINTENANCE-----------------------------------------225
15.3. PRINTING OPERATION PRINCIPLE -------------230
15.4. TERMINAL GUIDE OF THE ICs

TRANSISTORS AND DIODES---------------------- 235

15.5. HOW TO REPLACE THE FLAT PACKAGE IC -237
15.6. MAIN BOARD SECTION -----------------------------239
15.7. TEST CHART--------------------------------------------241

16 Schematic Diagram -------------------------------------------243

16.1. For Schematic Diagram-------------------------------243
16.2. KX-MB283RU MAIN BOARD------------------------245
16.3. KX-MB783RU MAIN BOARD------------------------255
16.4. OPERATION BOARD ---------------------------------265
16.5. SENSOR BOARD -------------------------------------- 266
16.6. HIGH VOLTAGE POWER SUPPLY BOARD ---- 268
16.7. LOW VOLTAGE POWER SUPPLY BOARD----- 269
16.8. HOOK SWITCH BOARD (KX-MB783RU

ONLY) -----------------------------------------------------270

17 Printed Circuit Board-----------------------------------------271

17.1. MAIN BOARD -------------------------------------------271
17.2. OPERATION BOARD ---------------------------------273
17.3. SENSOR BOARD -------------------------------------- 275
17.4. HIGH VOLTAGE POWER SUPPLY BOARD ---- 278