Panasonic UF 8100 YC User Manual

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3 Troubleshooting
3.1. Error Codes (For Copier)
The self-diagnostic functions detect troubles in the important components of the copier. When trouble 
occurs, the machine stops.
Note:
Some Codes are not used in the UF-7000/7100/8000/8100 and are reserved for future use.
3.1.1. User Error Codes (U Code)
Note:
Uxx and a message will appear on the Panel Display.
User Error Codes (U Code) Table
Code Item Check Points
U01 CLOSE FRONT COVER 1. Front Cover is open.
2. Front Cover Sensor is disconnected.
3. Front Cover Sensor is defective.
4. LVPS connector is disconnected.
5. LVPS is defective.
6. Engine PCB is defective.
U13 TONER IS RUNNING LOW
or 
OUT OF TONER1. Toner Cartridge is incorrectly installed.
2. Low Toner.
3. Toner Sensor is disconnected.
4. Toner Sensor is defective.
5. Engine PCB connector is disconnected. 
6. Engine PCB is defective.
U16 NO CARTRIDGE 1. No Toner Cartridge.
U20 CLOSE ADF COVER 1. ADF Cover is open.
2. ADF is not installed correctly.
3. ADF Cover Sensor is disconnected. 
4. ADF Cover Sensor is defective.
5. LVPS connector is disconnected.
6. LVPS is defective.
U90 REPLACE BATTERY  Backup Battery is wearing out.
U20 
U90
U13 / U16
U01
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3.1.1.1.Low Toner Messages / Operation
The Toner Cartridge Yield is approximately 5,000 pages using Letter or A4 size paper and 5% Black 
coverage, however, the maximum yield will not exceed 6,000 pages.
The machine controls the printer to maintain good print quality by controlling the Bias Voltage with the Low 
Toner Sensor and the Print Counter.
There are three Toner warning LCD Displays:
LCD 1: [TONER IS RUNNING LOW: U13]
Low Toner sensor detects Low Toner or the machine has printed 5,500 pages.
Preparing a new cartridge for replacement is recommended.
LCD 2: [WARNING TONER LOW LESS THAN 50 PAGES]
450 pages have been printed since the LCD 1 appeared.
Replacement with the new cartridge is recommended.
LCD 3: [OUT OF TONER: U13]
50 pages have been printed after LCD 2 appeared or 6,000 pages have been printed.
Replace with the new cartridge.
When replacing with a New Cartridge, perform the steps below to reset the Print Counter.
1. Press FUNCTION key.
2. Press 7 and 8 keys.
3. Press SET key.
4. Press 5 to enter 05 TONER REPLACEMENT? PRESS SET TO SELECT.
5. Press SET key, then TONER REPLACEMENT? 1:Yes 2:No.
6. Press 1 key to reset the Print Counter.
7. Press STOP key to return to the Standby mode.
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3.1.2. Jam Error Codes (J Code)
Section Jam Location
AADF
B Paper Transport / Exit Area
C Paper Entry Area
Jam Error Codes (J Codes) Table
Code Contents Section
J00 The Registration Sensor did not detect paper within a predetermined time after paper 
started feeding. (Sheet Bypass)
C J01 The Registration Sensor did not detect paper within a predetermined time after the 
Paper Feed Roller started rotating. (1st Feeder Unit)
J02 The Registration Sensor does not detect paper within a predetermined time after the 
Paper Feed Roller started rotating. (2nd Feeder Unit)
J43 Paper Jam in the Registration Sensor or Paper Path Sensor.
B, C
J44 Paper Jam in the Paper Exit / ADU Paper Jam Sensor.
J71 Original was longer than 78.7 in (2m).
(Information Code 031 or 032 is printed on the Transaction Journal instead.)
A J72 Read Point Sensor does not go ON within 10 seconds after the original starts feeding.
(Information Code 030 is printed on the Transaction Journal instead.)
J74 The Exit Sensor does not go ON within a predetermined time after the Sensor is 
activated.
J75 The Exit Sensor does not go OFF within a predetermined time after the Sensor is 
activated.
J80 The Automatic Duplex Unit (ADU) Entrance Sensor does not detect paper within a 
predetermined time. 
C J82 The ADU Exit Sensor does not detect paper within a predetermined time after ADU 
Middle Sensor is activated.
J83 The ADU Entrance Sensor keeps detecting paper after a predetermined time has 
lapsed. 
J92 The Original was pulled out when feeding an original.
A J93 The Original remained in the ADF.
J94The ADF does not go off after the predetermined time.
Unexpected Jam timing (i.e. Original is too short, etc.)
A
B
C
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•Sensor and Switch Location
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3.1.3. Mechanical Error Codes (E Code)
E1: Optical Unit Error
Code Function Check Points
E1- 22 Polygon Motor Synchronization 1. Engine PCB connector is disconnected. 
2. Engine PCB is defective.
3. Laser Unit is defective.
4. LVPS connectors is disconnected. 
5. LVPS is defective.
6. SC PCB is defective.
E2: Lift DC Motor Error
Code Function Check Points
E2 Not Applicable -
E3: Development System Error
Code Function Check Points
E3- 20 Main Motor Rotation 1. Drive Mechanism is defective.
2. Main Motor connector is disconnected.
3. Main Motor is defective.
4. Engine PCB connector is disconnected. 
5. Engine PCB is defective.
6. LVPS is defective.
E4: Fuser Unit Error
Code Function Check Points
E4- 01 Fuser Warm-up Temperature 1. Fuser Thermistor is dirty. 
2. Thermistor position is incorrect. 
3. Fuser temperature is low.
4. Thermistor is defective. 
5. Fuser Lamp connector is disconnected. 
6. Fuser Thermostat is defective.
7. Fuser Lamp is defective. 
8. Engine PCB connector is disconnected. 
9. Engine PCB is defective.
E4- 10 Exhaust Fan Motor Rotation 
(Fuser Unit Side) 1. Exhaust Fan connector is disconnected.
2. Exhaust Fan is defective. 
3. LVPS connector is disconnected.
4. LVPS is defective.
5. Engine PCB is defective.
E5: System Error
Code Function Check Points
E5- 11 Printer Engine Communication 
Abnormal1. SC/Engine PCB connector is disconnected.
2. SC/Engine PCB is defective.
E5- 12 Main CPU/SDR Interface Error 1. SC/SDR PCB connector is disconnected.
2. SC/SDR PCB is defective.
E5- 19 Scanner Line Synchronization 1.SC/SDR PCB connector is disconnected.
2. SC/SDR PCB is defective.
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Note:
These error codes will appear only when the optional accessories are installed. E5- 40 Sort Memory Abnormal 1. Sort Memory defective.
2. SC PCB connector is disconnected.
3. SC PCB defective.
E7: Optional Unit Error
Code Function Check Points
E7- 90 Hardware Key Abnormal 1. Incorrect Hardware Key is installed.
2. Hardware Key is defective.
E13: Low Toner or Out of Toner
Code Function Check Points
E13 TONER IS RUNNING LOW
or 
OUT OF TONER1. Toner Cartridge is incorrectly installed.
2. Out of Toner.
3. Low Toner Sensor is disconnected.
4. Low Toner Sensor is defective.
5. Engine PCB connector is disconnected. 
6. Engine PCB is defective. E5: System Error
Code Function Check Points
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3.2. Information Code Table (For Facsimile)
Fax Information Codes
Code Mode Phase Description of Problem Cause
001 RCV
COPYC, D Leading edge of the recording 
paper fails to reach the Timing 
Sensor. (1st Tray)Recording paper jam.
Timing Sensor abnormal.
002 RCV
COPYC, D Leading edge of the recording 
paper fails to reach the Timing 
Sensor. (2nd Tray)Recording paper jam.
Timing Sensor abnormal.
007 RCV
COPYC, D 1. Leading edge of the recording 
paper fails to reach the Paper 
Exit Sensor.
2. Recording paper has not 
completely passed the Paper 
Exit Sensor.Recording paper jam.
Paper Exit Sensor abnormal.
008 Paper Tray is opened while paper 
is feeding.Paper Tray is opened.
010 RCV
COPYB, C No recording paper.  No recording paper or paper is not set 
properly.
No Paper Sensor is defective.
011 STANDBY B, C Paper Tray is not installed 
properly.Connector is not installed properly.
012 RCV C, D The length of the received 
document is over 2 m.Transmitter Document Jam.
017 Incorrect paper size loaded in the 
Paper Tray.Paper size is incorrect.
030 XMT B Read Point Sensor does not go 
ON within 10 seconds after the 
document starts feeding.Document is not set properly.
Defective Read Point Sensor.
031 XMT
COPYC Transmitting document was longer
than 2 meter (or 78.7 in).The document may jam.
Defective Read Point Sensor.
041 STANDBY
RCV
COPYB, C, D Out of Toner. No toner.
Defective Low Toner Sensor.
043 STANDBY
RCV
COPYB, C, D Low Toner. Toner is getting low.
Defective Low Toner Sensor.
045 STANDBY - No Toner Cartridge. Toner Cartridge has not been installed.
Defective Toner Cartridge Sensor.
060 - A Printer Cover is open. Cover is not firmly closed.
Connectors are not firmly connected.
061 - A ADF Door is open. Door is not firmly closed.
Connectors are not firmly connected.
302 XMT
RCVB, C, D No response of 2nd G3 PCB. 2nd G3 PCB is defective.
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400 XMT B T1 timer (35 ± 5 sec.) elapsed 
without detecting 300 bps signal.Incorrect number was dialed and the 
START button was pushed.
Telephone line was disconnected while 
dialing.
SC PCB or FXB PCB are defective.
Receiver is defective. (It may only be 
transmitting CED)
401 XMT B DCN was returned from receiver 
while transmitter is waiting for CFR 
or FTT.Your machines ID Number is not 
programmed.
Possible incompatibility or incorrect 
Password.
402 XMT B DCN was returned from receiver 
while transmitter is waiting for 
NSF/DIS.Receiver working in non-ITU mode only. 
(Possible incompatibility)
403 RCV
(Polling)B Transmitter had no polling 
function.POLLED=ON (polling XMT ready) is 
not set at the transmitter. 
Document to be transmitted is not 
placed at the transmitter.
404 XMT B Transmitter sent NSS (or DCS) 
followed by TCF three times, but 
the receiver did not respond. (CFR 
or FTT is usually returned)Receiver is defective. (Modem)
SC PCB or FXB PCB are defective.
Receiver disconnects line during first 
NSS (or DCS) is transmitted.
405 XMT B Transmitter received FTT after it 
transmitted TCF at 2400bps.
Received RTN after 
communicating at 2400 bps.Line quality is poor. (TCF is damaged 
due to line noise)
Receiver is defective. (Modem, etc.) 
SC PCB or FXB PCB are defective.
406 RCV
(Password 
Comm.)B XMT-Password mismatched.
RCV-Password mismatched.
Selective RCV incomplete.XMT, RCV password does not match.
Last 4 digits of TSI does not match with
the last 4 digits of ONE-TOUCH, ABBR
telephone number.
407 XMT D Transmitter received no response 
after it transmitted post message, 
such as EOP, MPS, EOM, etc...or 
received DCN.Receiver is defective. (No paper, paper 
jamming, etc.) 
Receiver ceased receiving because of 
excessive error. (Line quality is poor) 
SC PCB or FXB PCB are defective.
408 XMT D Transmitter received RTN after it 
transmitted EOP, MPS, or EOM.Receiver receives data with error. (Line 
quality is poor) 
Receiver is defective. (Modem, etc.)
SC PCB or FXB PCB are defective.
409 XMT D Transmitter receives PIN after it 
transmitted a post message, such 
as EOP, MPS, EOM, etc.Receiver receives data with error due to 
poor line quality, and receiving operator 
requests voice contact.
Receiver is defective. (Modem, etc.)
SC PCB or FXB PCB are defective.
410 RCV D Received DCN while waiting for 
post command. (EOP, MPS, EOM, 
etc.)Interface or line is faulty.
Transmitter is defective.
411 RCV
(Polling)B Received DCN after transmitting 
NSC.Transmitter is not ready for polling  
communication. 
Password does not match between 
transmitter and receiver. Fax Information Codes
Code Mode Phase Description of Problem Cause
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412 G3 RX B, D No response within 12 seconds in 
NSS/DCS/MPS wait state. (After 
transmitting FTT)Transmitter is defective.
SC PCB is defective.
414 RCV
(Polling)B No response received after 
transmitting 3rd NSC.Password does not match between 
transmitter and receiver.
Transmitter is defective. (No original, 
document jam, etc.)
415 XMT
(Polling)B Remote side attempted to receive 
message from your machine in 
polling communication.Inform the remote side that your 
machine does not have the polling 
transmission feature.
416 RCV D Receiver did not detect post 
command, such as EOP, MPS, 
EOM, etc.Transmitter is defective.
Line quality is poor. (RTC signal is 
distorted due to line noise)
SC PCB or FXB PCB are defective.
417 RCV C Receiver returned RTN in 
response to post message.Line quality is poor. (There are 
excessive errors in received data)
SC PCB or FXB PCB are defective.
418 RCV C Receiver transmitted PIN in 
response to PRI-Q from 
transmitter. (Transmitting operator 
requests voice contact)Line quality is poor. (There are 
excessive errors in received data)
SC PCB or FXB PCB are defective.
420 RCV B T1 timer (35 sec.) elapsed without 
detecting 300 bps signal.Incorrect incoming call type (voice). 
(Non-facsimile communication)
Transmitter is defective.
SC PCB or FXB PCB are defective.
421 RCV B Busy Tone is detected after 
sending NSF Signal.Remote station disconnected the line.
Wrong number is dialed.
422 XMT B Content of NSF (or DIS) or NSC 
(or DTC) was invalid.There is an incompatibility.
427 G3 
RCVB DCN received to NSF/CSI/DIS 
transmitted.The interface is incompatible.
434 XMT or RCV B CD (response from Modem) did 
not turn OFF within 180 sec. after 
receiver detected FLAG signal.Remote unit is defective.
SC PCB or FXB PCB are defective.
436 G3 RX C DCN received after transmitting 
FTT.Transmitter is defective or incompatible.
Line quality is poor.
456 RCV B Received relay transfer request or 
confidential document to distribute 
to an end receiving station or all 
confidential mailboxes are used.
457 RELAY XMT 
CONF. XMT/
POLLB Remote unit does not have 
Relayed XMT or Confidential 
Comm. capability.
459 RCV C Failed training in Phase C. Line quality is poor. (Training signal is 
distorted due to line noise)
SC PCB or FXB PCB are defective.
490 RCV C Sum of error lines exceeded the 
limit (Function Parameter No. 70) 
of 64 lines.Line quality is poor.
SC PCB or FXB PCB are defective. Fax Information Codes
Code Mode Phase Description of Problem Cause
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494 RCV C Interval between two EOLs was 
more than 10 sec. when receiver 
received message data.Transmitter is defective.
Line quality is poor. (EOL is damaged 
due to line noise)
SC PCB or FXB PCB are defective.
495 XMT 
RCVC During reception, CD turned OFF 
or continued ON for long time. 
During communication, lost loop - 
current.Line is disconnected.
Transmitter is defective.
SC PCB or FXB PCB are defective.
496 XMT C CS of modem is not able to turn 
ON.FXB PCB is defective.
501 XMT/
RCV(V.34)B Remote unit does not have 
compatible Modem.
502 XMT/
RCV(V.34)B, C, D During reception, CD turned OFF 
or continued ON for long time. 
During communication, lost loop - 
current.Line is disconnected.
Transmitter is defective.
SC PCB or FXB PCB are defective.
503 XMT/
RCV(V.34)B, C, D CS of modem is not able to turn 
ON during training.FXB PCB is defective.
Line is disconnected.
504 RCV/V.34
(Polling)B Polling is rejected from the remote 
station.No polling original is set.
505 XMT/V.34
(Polling)B Polling XMT is rejected. No polling original is set.
540 XMT ECM B No response after transmitting 3rd 
CTC or DCN received.Incompatible interface.
541 XMT ECM D No response after transmitting 3rd 
EOR or received DCN.Line is faulty.
FXB PCB abnormal.
542 XMT ECM D No response to the 3rd RR 
transmitted or received DCN.Remote unit is abnormal.
543 XMT ECM D T5 timer (60 sec.) elapsed without 
MCF.Remote unit is abnormal.
544 XMT ECM D Stopped Transmission after EOR 
Transmission.Line is faulty.
FXB PCB abnormal.
550 RCV ECM C Timer between frames in phase C 
has elapsed.Defective remote station.
554 RCV ECM D Transmitted ERR after receiving 
EOR.Line is faulty.
555 RCV ECM D Transmitted PIN after receiving 
EOR.Line is faulty and Operator Call 
requested by RX side.
570 RCV B Password or machine code did not 
match during remote diagnostic 
communication.
571 XMT B Remote unit did not have the 
remote diagnostic function.
580 XMT B Sub-address transmission to a unit 
that has their DIS bit 49 (NSF bit 
155) OFF.Sub-address transmission to a unit that 
has no Sub-address function.
581 XMT B Sub-address Password 
transmission to a unit that has their 
DIS bit 50 (NSF bit 156) OFF.Sub-address transmission to a unit that 
has no Sub-address function. Fax Information Codes
Code Mode Phase Description of Problem Cause
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