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CHAPTER VI.
ERROR INDICATION AND TROUBLESHOOTING
CONTENTS
1.
ERROR INDICATION .................................................................................... 1.1 Equipment Errors ................................................................................... [ 1 ] Error messages on the LCD ....................................................... [ 2 ] Error codes shown in the "MACHINE ERROR XX" message ..... 1.2 Communications Errors ..........................................................................
VI-1 VI-1 VI-1 VI-3 VI-4
2.
TROUBLESHOOTING ...................................................................................
VI-11
2.1 Introduction ............................................................................................. VI-11 2.2 Precautions ............................................................................................. VI-11 2.3 Checking prior to Troubleshooting ......................................................... 2.4 Troubleshooting Procedures .................................................................. [ 1 ] Control panel related ................................................................... [ 2 ] Telephone related ....................................................................... [ 3 ] Communications related ............................................................. [ 4 ] Paper/document feeding related ................................................. [ 5 ] Print-image related ...................................................................... VI-11 VI-12 VI-12 VI-12 VI-13 VI-13 VI-14
1. ERROR INDICATION
To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile equipment incorporates the self-diagnostic functions which display error messages for equipment errors and communications errors. For the communications errors, the equipment also prints out the transmission verification report and the communications list.
1.1
Equipment Errors
If an equipment error occurs, the facsimile equipment emits an audible alarm (continuous beeping) for approximately 4 seconds and shows the error message on the LCD. For the error messages, see [ 1 ] below. As one of the error messages, "MACHINE ERROR XX" includes an error code which indicates the detailed error causes listed in [ 2 ]. To display an error code for the other latest error message, make the equipment enter the maintenance mode and press 8 and 2 keys (for details, refer to Chapter V, Section 3.9).
[1]
Error messages on the LCD Messages on the LCD PAPER ROLL EMPTY Probable Cause The paper empty (PE) sensor detects that no recording paper is present. The recording paper failed to return to the printing position after it had been cut. The cover sensor detects that the control panel ASSY is not closed.
s
PRINTER JAM
COVER OPEN
DOCUMENT JAM
Document jam
(1) The document length exceeds the limitation (400 or 90 cm) registered by firmware switch WSW16. (Refer to Chapter V, Section 3.5.) (Both the document front and rear sensors stay ON even after the document has been fed by the registered length.) (2) The document rear sensor detects no trailing edge of a document after the document has been fed by 400 cm. (The document rear sensor stays ON even after the document has been fed when the document front and rear sensors were OFF and ON, respectively.)
VI 1
Messages on the LCD DOCUMENT JAM
s
Probable Cause Document loading error
(1) The document rear sensor detects no leading edge of a document within 10 seconds from the start of document loading operation. (The document rear sensor stays OFF even after the document has been fed when the document front sensor was ON.) (2) The loaded document is too short. (Since the document is shorter than the distance between the document front and rear sensors, the document front sensor is turned OFF before the document rear sensor is turned ON.) CUTTER JAM The upper rotary blade of the automatic cutter failed to return to the home position within the specified time after cutting the recording paper. In the scanning compensation data list printed by the maintenance-mode function No. 05, less than fifty percent of the white level data is faulty. In the scanning compensation data list printed by the maintenance-mode function No. 05, fifty percent or more of the white level data is faulty. The thermistor in the recording head caused a heat error. "XX" indicates an error code. Refer to Section [ 2 ] on the next page.
CLEAN UP SCANNER
SCANNER ERROR
PRINTER FAULT MACHINE ERROR XX
If only an alarm beep is heard without any message on the LCD when the equipment is powered up, the ROM or RAM will be defective.
VI 2
[2]
Error codes shown in the "MACHINE ERROR XX" message
Error Code xx (Hex.) 82 87 ( 89 8A ( 8B ( A1 ( A2 ( A3 ( A4 A5 A6 A7 A8 A9 AB AC B1 ( B9 ( BA ( BB ( BC ( BD ( BE D1 D2 D3 D4 D5 D6 E1 ( E4 ( E5 E6 E8 ( EA F3 F5 FF Recording paper feeding error. Fails to complete the sequence of recording operation. Cutter jam. ) Wrong or weak contact of the recording head connectors. Recording head overheat. ) Recording paper cover opened. ) Document too long to scan. ) Document not detected by the document rear sensor. ) 50% or more faulty of white level data. ) Faulty operation of DMA0 during scanning. Faulty operation of DMA1 during scanning. One-line feeding time-out error. One-line scanning time-out error. Abnormal scanning reference voltage. Document feed-in amount measuring error. Less than 50% faulty of white level data. CODEC LSI error. Light emission intensity error of the LED array. ) Scanning error: The left-hand black reference line which is marked on the document pressure bar for scanning width setting is not detected.) Scanning error: The right-hand black reference line which is marked on the document pressure bar for scanning width setting is not detected.) Scanning error: Reduction miss) Scanning error: Enlargement miss) Abnormal clamp BWM value) The MODEM setup bit sticks to High. CTS stays OFF or ON if the MODEM RTS is turned ON or OFF, respectively. Bit B1A of the MODEM stays OFF. Bit RX of the MODEM stays OFF. The MODEM fails to complete the command transmission sequence. No MODEM interrupt for 60 seconds. Microprocessor (MPU) error on the control panel PCB. Out of recording paper. ) Recording paper set error. ) Write error in E2PROM. Data scanning error during transmission. Document removed at phase B.) Voice message recording or playing-back not started. EOL not found in page memory transmission mode. Interface error of page memory command.
Error factor
Error codes in parentheses do not appear in the "MACHINE ERROR XX", since those errors are displayed as messages described in "[ 1 ] Error messages on the LCD." Those error codes appear in the communications error list if an equipment error occurs during communications. Refer to Section 1.2, (13).
VI 3
1.2
Communications Errors
If a communications error occurs, the facsimile equipment (1) emits an audible alarm (intermittent beeping) for approximately 4 seconds, (2) displays the corresponding error message, and (3) prints out the transmission verification report if the equipment is in sending operation.
VI 4
s
Definition of Error Codes on the Communications List
(1) Calling Code 1 10 11 11 11 11 11 11 11 Code 2 08 01 02 03 05 06 07 10 Wrong number called. No dial tone detected before start of dialing. Busy tone detected before dialing. 2nd dial tone not detected. No loop current detected. * Busy tone detected after dialing or called. No response from the remote station in sending. No tone detected after dialing. Causes
17
07
No response from the calling station in receiving.
* Available in Germany and Austria only.
(2) Command reception Code 1 20 20 20 20 20 20 20 20 20 20 20 20 Code 2 01 02 03 04 05 06 07 08 09 0A 0B 0C Causes Unable to detect a flag field. Carrier was OFF for 200 ms or longer. Abort detected ("1" in succession for 7 bits or more). Overrun detected. A frame for 3 seconds or more received. CRC error in answer back. Undefined command received. Invalid command received. Command ignored once for document setting or for dumping-out at turn-around transmission. T5 time-out error CRP received. EOR and NULL received.
VI 5
(3) Compatibility [checking the NSF and DIS] Code 1 32 32 Code 2 01 02 Causes Remote terminal only with V.29 capability in 2400 or 4800 bps transmission. Remote terminal not ready for polling.
32 32 32 32 32
10 11 12 13 14
Remote terminal not equipped with password function or its password switch OFF. Remote terminal not equipped with or not ready for confidential mail box function. Remote terminal not equipped with or not ready for relay broadcasting function. No confidential mail in the remote terminal. The available memory space of the remote terminal is less than that required for reception of the confidential or relay broadcasting instruction.
VI 6
(4) Instructions received from the remote terminal [checking the NSC, DTC, NSS, and DCS] Code 1 40 40 Code 2 02 03 Causes Illegal coding system requested. Illegal recording width requested.
40 40 40
05 06 07
ECM requested although not allowed. Polled while not ready. No document to send when polled.
40 40
10 11
Nation code or manufacturer code not coincident. Unregistered group code entered for relay broadcasting function, or the specified number of broadcasting subscribers exceeding the limit. Retrieval attempted when not ready for retrieval. Polled by any other manufacturers' terminal while waiting for secure polling. Invalid resolution selected.
40 40 40
12 13 17
(5) Command reception [checking the NSF and DIS after transmission of NSS and DCS] Code 1 50 Code 2 01 Causes Vertical resolution capability changed after compensation of background color.
VI 7
(6) ID checking Code 1 63 63 63 63 63 63 Code 2 01 02 03 04 05 06 Causes Password plus "lower 4 digits of telephone number" not coincident. Password not coincident. Polling ID not coincident. Entered confidential mail box ID uncoincident with the mail box ID. Relay broadcasting ID not coincident. Entered retrieval ID uncoincident with that of the mail box ID.
(7) DCN reception Code 1 74 Code 2 DCN received. Causes
(8) TCF transmission/reception Code 1 80 Code 2 01 Fallback impossible. Causes
VI 8
(9) Signal isolation Code 1 90 90 Code 2 01 02 Causes Unable to detect video signals and commands within 6 seconds after CFR is transmitted. Received PPS containing invalid page count or block count.
(10) Video signal reception Code 1 A0 A0 A0 A0 A0 A0 A0 A0 A8 A9 AA Code 2 03 11 12 13 14 15 16 17 01 01 18 Causes Error correction sequence not terminated even at the final transmission speed for fallback. Receive buffer empty. (5-second time-out) Receive buffer full during operation except receiving into memory. Decoding error continued on 500 lines. Decoding error continued for 10 seconds. Time-out: Five seconds or more for one-line transmission. RTC not found and carrier OFF signal detected for 6 seconds. RTC found and command detected for 60 seconds. RTN, PIN, or ERR received at the calling terminal. * RTN, PIN, or ERR received at the called terminal. * Receive buffer full during receiving into memory. * Available in Germany and Austria only.
(11) General communications-related Code 1 B0 B0 B0 B0 Code 2 01 02 03 04 Causes Polarity inversion detected. Unable to receive the next-page data. Unable to receive polling even during turn-around transmission due to call reservation. PC interface error.
VI 9
(12) Maintenance mode Code 1 E0 E0 E0 Code 2 01 02 03 Causes Failed to detect 1300 Hz signal in burn-in operation. Failed to detect PB signals in burn-in operation. Failed to detect any command from the RS-232C interface in burn-in operation.
(13) Equipment error Code 1 FF Code 2 XX Causes Equipment error (For XX, refer to Subsection 1.1 [ 2 ].)
VI 10
2. TROUBLESHOOTING
2.1 Introduction
This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the facsimile equipment. It is impossible to anticipate all of the possible problems which may occur in future and determine the troubleshooting procedures, so this section covers some sample problems. However, those samples will help service personnel pinpoint and repair other defective elements if he/she analyzes and examines them well.
2.2
Precautions
Be sure to observe the following to prevent the secondary troubles from happening: (1) (2) (3) Always unplug the AC power cord from the outlet when removing the covers and PCBs, adjusting the mechanisms, or conducting continuity testing with a circuit tester. When disconnecting the connectors, do not pull the lead wires but hold the connector housings.
q
Before handling the PCBs, touch a metal portion of the machine to discharge static electricity charged in your body. When repairing the PCBs, handle them with extra care.
q
After repairing the defective section, be sure to check again if the repaired section works correctly. Also record the troubleshooting procedure so that it would be of use for future trouble occurrence.
2.3
Checking prior to Troubleshooting
Prior to proceeding to the troubleshooting procedures, check that: (1) (2) (3) Each voltage level on AC input lines and DC lines is correct. All cables and harnesses are firmly connected. None of the fuses are blown.
VI 11
2.4
[1]
Troubleshooting Procedures
Control panel related Trouble Check: · Main-panel harness between the main PCB and the control panel PCB · Interfaces between the main PCB, NCU PCB and power supply PCB · Control panel PCB · Power supply PCB · Main PCB
(1) LCD shows nothing.
(2) Control panel inoperative.
· Main-panel harness between the main PCB and the control panel PCB · Interfaces between the main PCB, NCU PCB and power supply PCB · Control panel PCB · FPC key · Main PCB
[2]
Telephone related Trouble Check: · FPC key · Control panel PCB by using the maintenance-mode function No. 13. If any defective keys are found, replace them. (Refer to Chapter V, Section 3.6.) · NCU PCB · Main PCB
(1) No phone call can be made.
(2) Speed dialing or one-touch dialing will not work.
· Ordinary dialing function (other than the speed and onetouch dialing) If it works normally, check the main PCB; if not, refer to item (1) above.
(3) Speaker silent during on-hook dialing.
· Ordinary dialing function (other than the on-hook dialing with the hook key) If it works normally, proceed to the following checks; if not, refer to item (1) above.
(4) Dial does not switch between tone and pulse.
· Main PCB
VI 12
Trouble (5) Telephone does not ring. · Speaker · NCU PCB · Main PCB
Check:
[3]
Communications related Trouble Check: · Main PCB · NCU PCB
(1) No tone is transmitted.
[4]
Paper/document feeding related Trouble Check: · Sensors by using the maintenance-mode function No. 32. (Refer to Chapter V, Section 3.7.) · Actuators of the document front and rear sensors · Main PCB
(1) Neither "COPY: PRESS COPY" nor "FAX: NO. & START" message appears although documents are set.
(2) Document not fed.
· ADF and its related sections · Drive motor and its harness · White pressure roller and its related gears · Solenoid and the planetary gear train · Main PCB
(3) Recording paper not fed.
· ADF and its related sections · Drive motor and its harness · Platen and its related gears · Solenoid and the planetary gear train · Main PCB
(4) The "CUTTER JAM" message cannot be removed.
· Drive motor and its harness · Cutter HP sensor and its position · Cutter gear · Solenoid and the planetary gear train · Main PCB VI 13
[5]
Print-image related If the received or sent image has any problem, first make a copy with the facsimile equipment. If the copied image is normal, the problem may be due to the remote terminal; if it is abnormal, proceed to the following checks: Trouble Check:
(1) Completely blank At the scanner At the recorder · Main PCB · Recording head harness · Compression springs beneath the recording head · Recording head · Main PCB (2) White vertical streaks At the scanner At the recorder (3) All black At the scanner · CIS harness · CIS unit · Main PCB At the recorder · Recording head harness · Recording head · Main PCB (4) Black vertical streaks At the scanner At the recorder (5) Light or dark At the scanner · CIS unit · Main PCB At the recorder · Compression springs beneath the recording head · CIS unit · Recording head · CIS unit · Recording head
VI 14
Trouble (6) Faulty image registration At the scanner · CIS harness · CIS unit · Main PCB At the recorder
Check:
· Recording head harness · Main PCB
(7) Image distortion In communications · Error code displayed (Refer to Section 1, "ERROR INDICATION" in this chapter.) · NCU PCB · Main PCB At the scanner · Separation roller and its related sections · White pressure roller and its related gears · Solenoid and the planetary gear train · Drive motor and its harness · Main PCB At the recorder · Compression springs beneath the recording head · Platen and its related gears · Solenoid and the planetary gear train · Drive motor and its harness · Main PCB
VI 15
March '98 5X1S112 Printed in Japan