Panasonic KX FLB758RU User Manual

							6.5.5.4. Others
No.SymptomCauseCountermeasure
1Cannot print legal sizeNot selected the legal modeSelect the legal mode in the user programming mode
2´CHECK DRUM´on the
LCDNo connection between the drum unit and the
whole unitReplace the drum unit or the terminal of whole unit
Failed the drum sensorGo to DRUM SENSOR....” CHECK DRUM”(P.189)
3´CHANGE DRUM ´on the
LCDThe toner sensor cannot detect the drum unitReplace the toner sensor lever or check the analog board
Dust between the drum unit and the toner
sensor (especially metals)Remove the dust
4´OUT OF PAPER ´on the
LCDFailed the paper sensor leverReplace the paper sensor lever
Failed the paper sensorGo to PAPER SENSOR..... “OUT OF PAPER” (P.191)
5´COVER OPEN´on the
LCDFailed the top cover open switch leverReplace the top cover open switch lever
Failed the top cover open switchGo to TOP COVER OPEN SWITCH....” COVER OPEN”
(P.189)
6CALL SERVICE 1´ on the
LCDThe polygon motor of LSU is unusuallyCheck the connector and LSU and the digital board
7CALL SERVICE 2´ on the
LCDThe laser of LSU is unusuallyCheck the connector and LSU and the digital board
8CALL SERVICE 3´ on the
LCDThe fuser temperature is unusuallyCheck the connector and the fuser and the thermistor and the
digital board
9CALL SERVICE 4´ on the
LCDThe fan motor is unusuallyCheck the connector and the fan motor and the digital board
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							6.5.6. CALL SERVICE TROUBLESHOOTING GUIDE
Call Servic e related error is most frequent.Call Service 1 ----- Polygo n doesn ’t rotate......... Refer to LSU (Laser Scanning Unit) SECTION (P.183).
 
     · 
  
  First, listen to the sound. If rotation sound isn ´t heard, check 24V line, POLON signal and POLCLK signal. If even a little of
sound is heard, check XREADY signal.
Call Service 2 ----- Laser isn ´t output.......... Refer to LSU (Laser Scanning Unit) SECTION (P.183)
 
  
  · 
  
  This can be judged only by referring to signal. Check 5V line, LDEN and VIDEO.
Call Service 3 ----- Detection of fixing temperature.......... Refer to HEAT LAMP CONTROL CIRCUIT(P.199)
 
  
  · 
  
  The most possible reason is that connector isn ´t engaged firmly. And comparator (IC611) on the digital PCB might be
broken because of static electricity. There are 2 kinds of temperature errors, “low temperature error ”, which means that low
voltage is input to the comparator and “high temperature error ”, which means that high voltage is input to the comparator.
 
  
  · 
  
  *Service mode *655 tells the detection number and 3 latest temperatures of the thermistor. The detection point of the Call
Service 3 and the thermistor temperature is displayed. Maximum 3 latest temperatures are displayed showing the newest
on the left. [AABB CCDD EEFF] AA, CC and EE show the detection points and BB, DD and FF show their temperature
detection points.
00: means that CALL SERVICE 3 has not been appeared.
01: means that it did not reach 85 °C within 11 seconds since the heater was turned ON.
03: means that it did not reach the secondary stabilizing temperature (180° C) within 30 seconds from 85°C.
04: means that it became T2-55d eg (125 °C or below) after T2; the secondary stabilizing temperature (180 °C). (The heater
has burnt out.)
05: means that it became over 247 °C.
06: means that during printing the SHORT of the thermistor (AD:0FF HEX) was detected.
Call Service 4 ----- Rotation of Fan.......... Refer to FAN MOTOR SECTION(P.180)
 
     · 
  
  Connector isn ’t inserted firmly, dust is caught in and the fan is broken.
* As for Call Services 1, 2 and 4, turn the power OFF then ON to restart.

Once “CALL SERVICE3” is displayed, the unit does not disappear until the Factory Setup or Service Function #529 is executed.
Therefore Service Function #529 should be executed before the confirmation, and #529 should be done after the countermeasure.
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							6.5.6.1. CALL SERVICE 1
CALL SERVICE 1 means that the polygon motor inside the LSU does not rotate.
The rotation of the polygon motor is detected by IC610-90pin (XREADY).
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							6.5.6.2. CALL SERVICE 2
CALL SERVICE 2 means that the synchro nous signal out of the LSU cannot be detected.
The synchro nous signal out of the LSU is detected by IC 610-89pin. (XHSYNC)
Note:As for the Pulse waveform of the above flow chart, see the timing chart.
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							6.5.6.3. CALL SERVICE 3
CALL SERVICE 3 means that the temperature of the fuser does not rise up to or exceed a constant temperature.
The temperature is monitored with the thermistor inside the fuser and detected with the voltage input into IC 604-Y6pin.
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							6.5.6.4. CALL SERVICE 4
CALL SERVICE 4 means that the FAN does not run or the running of the FAN cannot be detected normally.
The running of the FAN is detected by IC 610-93pin. CALL SERVICE 4 is displayed when it detects NG five times continuously.
After reparing, copy five times.If“CALL SERVI CE 4 “is displayed, check again.
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							6.5.7. PRINT
6.5.7.1. GHOST IMAGE
CROSS REFER ENCE:HIGH VOLTAGE SECTION (P.150)
POWE R SUPPL Y BOARD SECTION (P.155)
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							6.5.7.2. DARK OR WHITE VERTICAL LINE
Note:W hen wiping the lower glass, reflecting mirror and LSU lens, use a dry and soft cloth.
CROSS REFER ENCE: LSU SECTION (P.147)
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							6.5.7.3. DARK OR WHITE HORIZONTAL LINE
CROSS REFER ENCE:HIGH VOLTAGE SECTION (P.150)
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							6.5.7.4. DIRTY OR HALF DARKNE SS BACKGROUND
CROSS REFER ENCE:HIGH VOLTAGE SECTION (P.150)
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