6.5.5. SIMPLIFIED TROUBLESHOOTING GUIDE
6.5.5.1. PRINTING
No.
Symptom
Cause
Countermeasure
1
GHOST IMAGE (P.97)
Failed drum unit
Replace drum unit
Failed transfer unit
Check the transfer roller and spring
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Failed fuser unit
Check the heat roller and the pressuizedr roller and the spring
and the heat lamp and the thermistor
Failed the power supply board
Go to POWER SUPPLY BOARD SECTION (P.155)
Too thick or too thin recording paper
Use the recording paper from 16lb to 24lb
2
DARK OR WHITE
VERTICAL LINE (P.98)
Dirty the lower glass or the reflecting mirror
Clean the lower glass and the reflecting mirror
Dust on the path of the laser beam
Clean the path of the laser beam
Dust on the developer roller
Replace drum unit
Failed the heat roller or the pressuizedr roller
Check the heat roller and the pressurized roller
Failed LSU
Go to LSU SECTION (P.147)
3
DARK OR WHITE
HORIZONTAL LINE (P.99)
Failed drum unit
Replace drum unit
Failed the gear
Check the gear
Failed the engine motor
Go to ENGINE MOTOR (P.144)
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Scratch on the OPC drum
Replace drum unit
Static electricity on the documents (when
copying)
Check the connection between the parts around CIS and earth
4
DIRTY OR HALF
DARKNESS
BACKGROUND (P.100)
Failed drum unit
Replace drum unit
Life of drum unit is over
Replace drum unit
Dirty the pickup roller and the regist roller and
the feed roller and the eject roller and the heat
roller and the pressure roller
Clean the pickup roller and the regist roller and the feed roller
and the eject roller and the heat roller and the pressure roller
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Dirty the recording paper path
Clean the recording paper path
5
BLACK PRINT (P.101)
Failed drum unit
Replace drum unit
Failed LSU
Go to LSU SECTION (P.147)
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Failed the digital board
Check the digital board
Failed CIS (when copying)
Go to CIS (Contact Image Sensor) SECTION (P.148)
6
LIGHT PRINT (P.102)
Short toner
Supply toner
Failed drum unit
Replace drum unit
Life of drum unit is over
Replace drum unit
Dirty the lower glass or the reflecting mirror
Clean the lower glass and the reflecting mirror
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
7
BLACK DENSITY IS
LIGHT OR UNEVEN.
(P.103)
Short toner
Supply toner
Failed drum unit
Replace drum unit
Life of drum unit is over
Replace drum unit
Dirty the lower glass or the reflecting mirror
Clean the lower glass and the reflecting mirror
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
8
BLANK PRINT (P.104)
Failed drum unit
Replace drum unit
Failed LSU
Go to LSU SECTION (P.147)
Failed the high-voltage terminal
Check the high-voltage terminal
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Failed the digital board
Check the digital board
Failed CIS (when copying)
Go to CIS (Contact Image Sensor) SECTION (P.148)
9
BLACK OR WHITE POINT
(P.104)
Failed the developer roller (27mm pitch)
Replace drum unit
Failed the OPC drum (75mm pitch)
Replace drum unit
Failed the heat roller (50mm pitch)
Check the heat roller
Failed the charge blush
Replace drum unit
Failed the high voltage power supply board
Go to HIGH VOLTAGE SECTION (P.150)
Too thick or too thin recording paper
Use the recording paper from 16lb to 24lb
88
KX-FLB758RU
Summary of Contents for KX-FLB758RU
Page 6: ...1 3 TRANSLATION LISTS 1 3 1 HELP FUNCTION 1 3 2 LCD MESSAGES 6 KX FLB758RU ...
Page 7: ...1 3 3 REPORTS 7 KX FLB758RU ...
Page 15: ...3 1 3 CONTROL PANEL 15 KX FLB758RU ...
Page 23: ...3 4 8 SETTING YOUR LOGO The logo can be your company division or name 23 KX FLB758RU ...
Page 43: ...5 5 HOW TO REMOVE THE PAPER TRAY DOCUMENT COVER AND PAPER GUIDE 43 KX FLB758RU ...
Page 44: ...5 6 HOW TO REMOVE THE PRINTER COVER 44 KX FLB758RU ...
Page 45: ...5 7 HOW TO REMOVE THE PICK UP ROLLER ASS Y 45 KX FLB758RU ...
Page 49: ...5 14 HOW TO REMOVE THE REGISTRATION ROLLER 5 15 HOW TO REMOVE THE H V P S 49 KX FLB758RU ...
Page 51: ...5 18 HOW TO REMOVE THE MOTOR BLOCK 51 KX FLB758RU ...
Page 52: ...5 19 HOW TO REMOVE THE WHITE SHEET 52 KX FLB758RU ...
Page 53: ...5 20 HOW TO REMOVE THE DOCUMENT GUIDE 5 21 HOW TO REMOVE THE ADF RELAY BOARD 53 KX FLB758RU ...
Page 54: ...5 22 HOW TO REMOVE THE FEED ROLLER AND ADF SEPARATION ROLLER 54 KX FLB758RU ...
Page 55: ...5 23 HOW TO REMOVE THE TOP COVER AND CONVEYOR BLOCK 55 KX FLB758RU ...
Page 57: ...5 26 HOW TO REMOVE THE TRANSFER ROLLER 57 KX FLB758RU ...
Page 58: ...5 27 HOW TO REMOVE THE OPERATION BOARD 58 KX FLB758RU ...
Page 59: ...5 28 HOW TO REMOVE THE SCANNER GLASS UNIT AND CIS 59 KX FLB758RU ...
Page 61: ...5 31 NOTES FOR ASSEMBLING 5 31 1 PINCH ROLLER SPRING 5 31 2 FAN MOTOR 61 KX FLB758RU ...
Page 62: ...5 31 3 SCANNER GLASS ASS Y 62 KX FLB758RU ...
Page 63: ...5 31 4 FCC DIGITAL BOARD 63 KX FLB758RU ...
Page 64: ...5 32 INSTALLATION POSITION OF THE LEAD 64 KX FLB758RU ...
Page 65: ...65 KX FLB758RU ...
Page 66: ...66 KX FLB758RU ...
Page 67: ...67 KX FLB758RU ...
Page 68: ...68 KX FLB758RU ...
Page 76: ...1 NO 01 2 NO 07 3 NO 03 4 NO 09 6 3 3 PRINT TEST PATTERN 76 KX FLB758RU ...
Page 102: ...6 5 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 150 102 KX FLB758RU ...
Page 104: ...6 5 7 8 BLANK PRINT 6 5 7 9 BLACK OR WHITE POINT 104 KX FLB758RU ...
Page 106: ...6 5 8 3 SKEW 106 KX FLB758RU ...
Page 111: ...CROSS REFERENCE MOTOR SECTION P 144 111 KX FLB758RU ...
Page 112: ...6 5 9 2 1 ADF 6 5 9 2 SKEW 112 KX FLB758RU ...
Page 124: ...124 KX FLB758RU ...
Page 126: ...Note If the problem remains see the following Countermeasure flow chart 126 KX FLB758RU ...
Page 127: ...CROSS REFERENCE TEST FUNCTIONS P 74 127 KX FLB758RU ...
Page 128: ...CROSS REFERENCE TEST FUNCTIONS P 74 128 KX FLB758RU ...
Page 129: ...CROSS REFERENCE TEST FUNCTIONS P 74 129 KX FLB758RU ...
Page 130: ...CROSS REFERENCE TEST FUNCTIONS P 74 130 KX FLB758RU ...
Page 131: ...131 KX FLB758RU ...
Page 132: ...132 KX FLB758RU ...
Page 133: ...CROSS REFERENCE TEST FUNCTIONS P 74 133 KX FLB758RU ...
Page 134: ...6 5 11 5 CHECK THE STATUS OF THE DIGITAL BOARD 134 KX FLB758RU ...
Page 136: ...CROSS REFERENCE CHECK THE STATUS OF THE DIGITAL BOARD P 134 136 KX FLB758RU ...
Page 144: ...6 5 13 6 MOTOR SECTION 6 5 13 6 1 ENGINE MOTOR 144 KX FLB758RU ...
Page 145: ...6 5 13 6 2 ADF MOTOR 145 KX FLB758RU ...
Page 146: ...6 5 13 6 3 CR MOTOR 146 KX FLB758RU ...
Page 147: ...6 5 13 7 LSU SECTION CROSS REFERENCE LSU Laser Scanning Unit SECTION P 183 147 KX FLB758RU ...
Page 148: ...6 5 14 CIS Contact Image Sensor SECTION CROSS REFERENCE TEST FUNCTIONS P 74 148 KX FLB758RU ...
Page 150: ...6 5 16 HIGH VOLTAGE SECTION 150 KX FLB758RU ...
Page 151: ...151 KX FLB758RU ...
Page 152: ...152 KX FLB758RU ...
Page 153: ...153 KX FLB758RU ...
Page 156: ...6 5 17 2 TROUBLESHOOTING FLOW CHART 156 KX FLB758RU ...
Page 158: ...6 6 PROBLEMS WITH PC SOFTWARE 6 6 1 GENERAL 158 KX FLB758RU ...
Page 159: ...6 6 2 SCAN 159 KX FLB758RU ...
Page 160: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 7 1 1 CONNECTION DIAGRAM 1 160 KX FLB758RU ...
Page 161: ...7 1 2 CONNECTION DIAGRAM 2 161 KX FLB758RU ...
Page 162: ...7 1 3 POWER SUPPLY FLOW 162 KX FLB758RU ...
Page 164: ...164 KX FLB758RU ...
Page 175: ...7 5 1 2 ENGINE MOTOR DRIVE CIRCUIT 175 KX FLB758RU ...
Page 183: ...7 8 LSU Laser Scanning Unit SECTION 183 KX FLB758RU ...
Page 184: ...184 KX FLB758RU ...
Page 212: ...8 1 9 TIMING CHART When Printing Two Sheets of Paper BASIC 212 KX FLB758RU ...
Page 213: ...8 1 10 Timing Chart Initializing Short 8 1 11 Timing Chart Initializing Long 213 KX FLB758RU ...
Page 215: ...8 2 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 215 KX FLB758RU ...
Page 216: ...216 KX FLB758RU ...
Page 219: ...8 4 1 NG EXAMPLE 219 KX FLB758RU ...
Page 220: ...8 4 2 ASIC IC604 PIN LAYOUT 220 KX FLB758RU ...
Page 226: ...226 KX FLB758RU ...
Page 232: ...8 8 TEST CHART 8 8 1 ITU T No 1 TEST CHART 232 KX FLB758RU ...
Page 233: ...8 8 2 ITU T No 2 TEST CHART 233 KX FLB758RU ...
Page 234: ...9 FIXTURES AND TOOLS 234 KX FLB758RU ...
Page 235: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTON 235 KX FLB758RU ...
Page 236: ...10 2 DOCUMENT TRAY BLOCK AND UPPER ADF SECTION 236 KX FLB758RU ...
Page 237: ...10 3 CONVERYOR BLOCK SECTION 237 KX FLB758RU ...
Page 238: ...10 4 LOWER ADF SECTION 238 KX FLB758RU ...
Page 239: ...10 5 UPPER PRINTER COVER SECTION 239 KX FLB758RU ...
Page 240: ...10 6 LOWER PRINTER SECTION 240 KX FLB758RU ...
Page 241: ...10 7 UPPER MAIN CABINET SECTION 241 KX FLB758RU ...
Page 242: ...10 8 LOWER MAIN CABINET SECTION 242 KX FLB758RU ...
Page 243: ...10 9 FUSER SECTION 243 KX FLB758RU ...
Page 244: ...10 10 MAIN FRAME SECTION 244 KX FLB758RU ...
Page 245: ...10 11 MOTOR SECTION 245 KX FLB758RU ...
Page 246: ...10 12 ACTUAL SIZE OF SCREWS AND WASHER 246 KX FLB758RU ...
Page 247: ...11 ACCESSORIES AND PACKING MATERIALS 247 KX FLB758RU ...
Page 292: ...292 KX FLB758RU HI Q KXFLB758RU ...