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B121/B122/B123 SERVICE MANUAL
001874MIU
RICOH GROUP COMPANIES
SERVICE CALL CONDITIONS
4. TROUBLESHOOTING
4.1 SERVICE CALL CONDITIONS
4.1.1 SUMMARY
There are four levels of service call conditions.
Level A Definition To prevent damage to the machine, the main machine cannot be operated until the SC has been reset by a service representative (see the note below). If the SC was caused by incorrect sensor detection, the SC can be reset by turning the main power switch off and on. The main machine can be operated as usual, excluding the unit related to the service call. The SC history is updated. The machine can be operated as usual. Reset Procedure Enter SP mode, and then turn the main power switch off and on. Turn the main power switch off and on. Turn the main power switch off and on. The SC will not be displayed. Only the SC history is updated.
Troubleshooting
B C D
NOTE: 1) If the problem concerns electrical circuit boards, first disconnect then reconnect the connectors before replacing the PCBs. 2) If the problem concerns a motor lock, first check the mechanical load before replacing motors or sensors.
SM
4-1
B121/B122/B123
SERVICE CALL CONDITIONS
4.1.2 SC CODE DESCRIPTIONS
No. Definition 101 B Symptom Exposure Lamp Error The standard white level was not detected properly when scanning the white plate. Possible Cause · Exposure lamp defective · Exposure lamp stabilizer defective · Exposure lamp connector defective · Dirty scanner mirror or scanner mirror out of position · SBU board defective · SBU connector defective · Lens block out of position · Incorrect position or width of white plate scanning (! SP4-015) · Scanner home position sensor defective · Scanner drive motor defective · Scanner home position sensor connector defective · Scanner drive motor connector defective · BICU board defective · Scanner home position sensor defective · Scanner drive motor defective · Scanner home position sensor connector defective · Scanner drive motor connector defective · BICU board defective
120
B
Scanner home position error 1 The scanner home position sensor does not detect the off condition during initialization or copying.
121
B
Scanner home position error 2 The scanner home position sensor does not detect the on condition during initialization or copying.
143
D
SBU white/black level correction error The automatic SBU adjustment has failed to correct the black level. The automatic SBU adjustment has failed to correct the white level twenty times consecutively.
144
B
· Exposure lamp defective · Dirty white plate · Incorrect position or width of white plate scanning (! SP4-015) · BICU board defective · SBU board defective Communication Error between BICU and SBU The BICU board cannot detect the SBU · The flat cable between the BICU connect signal. board and the SBU has a poor connection · The flat cable between the BICU board and the SBU is damaged · BICU board defective · SBU defective
B121/B122/B123
4-2
SM
SERVICE CALL CONDITIONS
No. Definition 145 D Symptom Automatic SBU adjustment error During the automatic SBU adjustment, the machine detects that the white level read from the white plate or paper is out of range. (! SP4-428) Possible Cause · Exposure lamp defective · Dirty white plate · Incorrect position or width of white plate scanning (! SP4-015) · BICU board defective · SBU board defective · BICU board defective · Controller board defective · The firmware programs of the engine and the controller do not match. · BICU board defective · Controller board defective · Charge roller damaged · High voltage supply board defective · Poor connection of the PCU · Polygon mirror motor defective · Poor connection between the polygonal mirror motor driver and the BICU board · Damaged cable between BICU and polygonal mirror motor driver · BICU board defective · BICU board defective · The fax controller or printer controller has a poor connection · Fax controller or printer controller defective · Poor connection between the LD unit and the BICU board · Damaged cable between BICU and LD unit · LD unit out of position · LD unit defective · BICU board defective · TD sensor abnormal · Poor connection of the PCU · Poor connection of the PCU · High voltage supply board defective Troubleshooting
193
B
Image transfer error Scanned images are not transferred to the controller memory within 1 minute. Memory address error The BICU board does not receive memory addresses from the controller board. Charge roller current leak A current leak signal for the charge roller is detected. Polygonal mirror motor error The polygon mirror motor does not reach operating speed within 10 seconds after the motor ON signal is sent, or does not turn on within one of the 200 ms check intervals during operation. No laser writing signal (F-GATE) error The laser writing signal (F-GATE) fails to turn Low after the laser crosses 5 mm on the drum surface from the laser writing start position. Laser synchronization error The main scan synchronization detector board cannot detect the laser synchronization signal for more than 5 consecutive 100 ms intervals.
198
B
302
B
320
B
321
C
322
B
390
B
391
B
TD sensor error The TD sensor outputs less than 0.2 V or more than 4.0 V 10 times consecutively during copying. Development bias leak A development bias leak signal is detected.
SM
4-3
B121/B122/B123
SERVICE CALL CONDITIONS
No. Definition 392 B Symptom TD sensor initial setting error TD sensor initial setting is not performed correctly. Possible Cause · ID sensor defective · No developer · Drum does not turn · Development roller does not turn · Poor connection of the PCU · The voltage is not applied to charge roller · High voltage supply board defective · Poor connection of the PCU · Transfer/separation unit set incorrectly · Transfer roller damaged · High voltage supply board defective · Poor connection of the PCU · Transfer/separation unit set incorrectly · Transfer roller damaged
401
B
Transfer roller leak error 1 A current leak signal for the transfer roller is detected. A current feedback signal for the transfer roller is not detected. Transfer roller leak error 2 A current leak signal for the transfer roller is detected. A current feedback signal for the transfer roller is not detected.
402
B
500
B
502
C
503
C
504
C
Main motor lock A main motor lock signal is not · Too much load on the drive detected for more than 7 consecutive mechanism checks (700 ms) after the main motor · Main motor defective starts to rotate, or the lock signal is not detected for more than 7 consecutive checks during rotation after the last signal. Tray 2 lift motor malfunction (Optional Paper Tray units) The paper lift sensor fails to activate · Paper lift sensor defective twice continuously after the tray lift · Tray lift motor defective motor has been on for 18 seconds. · Too much load on the drive mechanism · Poor tray lift motor connection Tray 3 lift motor malfunction (optional paper tray units) The paper lift sensor fails to activate · Paper lift sensor defective twice continuously after the tray lift · Tray lift motor defective motor has been on for 18 seconds. · Too much load on the drive mechanism · Poor tray lift motor connection Tray 4 lift motor malfunction (optional two-tray paper tray unit) The paper lift sensor fails to activate · Paper lift sensor defective twice continuously after the tray lift · Tray lift motor defective motor has been on for 18 seconds. · Too much load on the drive mechanism · Poor tray lift motor connection
B121/B122/B123
4-4
SM
SERVICE CALL CONDITIONS
No. Definition 506 C Symptom Possible Cause
541
A
542
A
543
A
545
A
546
A
547
B
551
A
552
A
SM
4-5
B121/B122/B123
Troubleshooting
544
A
Paper feed motor lock (optional paper tray units) A motor lock signal is not detected for · Paper feed motor defective more than 1.5 s or the lock signal is not · Too much load on the drive detected for more than 1.0 s during mechanism rotation. Fusing thermistor open (center) The fusing temperature detected by the · Fusing thermistor defective or out of position thermistor is below 71°C and is not corrected after the main power switch is · Power supply board defective turned on. · Loose connectors Fusing temperature warm-up error (center) The fusing temperature rises less than · Fusing thermistor defective or out of 7 degrees in 2 seconds, and this position continues 5 times consecutively. · Fusing lamp open The fusing temperature is not detected · Power supply board defective in 25 or 35 seconds. Fusing overheat error (center) · Fusing thermistor defective The fusing temperature is over 230°C for 1 second (detected by the · Power supply board defective thermistor). Fusing overheat error (center) 2 · Fusing thermistor defective The fusing temperature is over 250°C for 1 second (detected by the fusing · Power supply board defective temperature monitor circuit). Fusing lamp overheat error (center) After the fusing temperature reaches · Fusing thermistor defective or out of the target temperature, the fusing lamp position does not turn off for 12 consecutive · Power supply board defective seconds. Unstable fusing temperature (center) · Thermistor defective or out of The fusing temperature varies 50°C or position more within 1 second, and this occurs 2 consecutive times. · Power supply unit defective Zero cross signal malfunction Zero cross signals are not detected · Power supply board defective within 5 seconds after the main power · BICU defective switch is turned on, or are not detected within 1 second after operation begins. Fusing thermistor open (rear) The fusing temperature detected by the · Fusing thermistor defective or out of position thermistor is below 71°C and is not corrected after the main power switch is · Power supply board defective turned on. · Loose connectors Fusing temperature warm-up error (rear) The fusing temperature rises less than · Fusing thermistor defective or out of 7 degrees in 2 seconds, and this position continues 5 times consecutively. · Fusing lamp open The fusing temperature is not detected · Power supply board defective in 25 or 35 seconds.
SERVICE CALL CONDITIONS
No. Definition 553 A Symptom Fusing overheat error (rear) The fusing temperature is over 230°C for 1 second (detected by the thermistor). Fusing lamp overheat error (rear) After the fusing temperature reaches the target temperature, the fusing lamp does not turn off for 20 consecutive seconds. Unstable fusing temperature (rear) The fusing temperature varies 50°C or more within 1 second, and this occurs 2 consecutive times. Left exhaust fan motor error The CPU detects an exhaust fan lock signal for more than 5 seconds. Rear exhaust fan motor error The CPU detects an exhaust fan lock signal for more than 5 seconds. Possible Cause · Fusing thermistor defective · Power supply board defective · Fusing thermistor defective or out of position · Power supply board defective · Thermistor defective or out of position · Power supply unit defective · Loose connection of the exhaust fan motor · Too much load on the motor drive
555
A
556
A
590
B
591
B
620
B
621
B
632
C
633
C
634
C
635
B
· Loose connection of the exhaust fan motor · Too much load on the motor drive Communication error between BICU and ADF The BICU does not receive a response · Poor connection between the BICU from the ADF main board for 4 seconds and ADF main board (DF connector) or more. · ADF main board defective The BICU receives a break signal from · BICU defective the ADF main board. ADF connection error An incorrect ADF (an ADF for some · ADF incorrect (The ADF for other copier) is detected. (for Basic and B039/B040/B043 is installed on a MFP machines) B121/B122/B123.) An ADF (including the correct ADF) is · The connector of the ADF is removed installed while the copier is in the while the machine is in the energy energy saver mode. (for MFP machine saver mode. only) Accounting error 1 An error is detected during the · Accounting device defective communication with the MF accounting · Loose connection device. Accounting error 2 After communication is established with · Accounting device defective the MF accounting device, a brake · Loose connection signal is issued. Accounting RAM error An error is detected in the RAM that · Accounting device defective saves the information on the MF accounting. Accounting battery error An error is detected in the battery that · Accounting device defective is in the MF accounting device.
B121/B122/B123
4-6
SM
SERVICE CALL CONDITIONS
No. Definition 670 C Symptom Engine start error The engine-ready signal is not issued within 70 seconds after the switch is turned on. ADF gate abnormal 1 The ADF Gate signal line between the ADF main board and the BICU is disconnected. Possible Cause · Engine board defective · Controller defective · Loose connection · ADF main board defective · Input/output board defective · Poor connection (ADF Gate line) between the ADF main board and the BICU. · ADF connector defective · SBU board defective · ADF connector defective · SBU board defective · Controller board defective
760
B
761
B
762
B
800
B
804
B
818
B
ADF gate abnormal 2 The FGATE signal is not issued from the ADF within 30 seconds after the ADF starts feeding. ADF gate abnormal 3 The FGATE signal is not terminated by the ADF within 60 seconds after the ADF starts feeding. Startup without video output end error Video transfer to the engine is started, but the engine did not issue a video transmission end command within the specified time. Startup without video input end A video transmission was requested from the scanner, but the scanner did not issue a video transmission end command within the specified time. Watchdog error The CPU does not access the watchdog register within a certain time. Kernel mismatch error Software bug Self-Diagnostic Error: CPU The central processing unit returned an error during the self-diagnostic test. Self-Diagnostic Error: ASIC The ASIC returned an error during the self-diagnostic test because the ASIC and CPU timer interrupts were compared and determined to be out of range. Self-diagnostic Error: Network Interface The network interface board returned an error during the self-diagnostic test. Self-diagnostic Error: NVRAM The resident non-volatile RAM returned an error during the self-diagnostic test.
· Controller board defective
· Controller board defective · Software malfunction download controller firmware again · Download controller firmware again · Controller board defective · Download controller firmware again · Controller board defective
819 820
B B
821
B
823
C
· Network interface board defective · Controller board defective · Replace the NVRAM on the controller board · Replace the controller board
824
B
SM
4-7
B121/B122/B123
Troubleshooting
SERVICE CALL CONDITIONS
No. Definition 826 B Symptom Possible Cause
827
B
828
B
Self-diagnostic Error: NVRAM/Optional NVRAM The NVRAM or optional NVRAM · Replace the NVRAM on the controller returned an error during the selfboard diagnostic test. Self-diagnostic Error: RAM The resident RAM returned a verify · Download controller firmware again error during the self-diagnostic test. Self-diagnostic Error: ROM The resident read-only memory · Controller board defective returned an error during the self· Download controller firmware again diagnostic test. Self-diagnostic Error: Optional RAM The optional RAM returned an error during the self-diagnostic test. Self-diagnostic Error: Clock Generator A verify error occurred when setting data was read from the clock generator via the I2C bus. Network I/F Abnormal NIB interface error. IEEE 1394 I/F Abnormal IEEE1394 interface error.
829
C
· Replace the optional memory board · Controller board defective · Replace the controller board
838
B
850
C
· NIB defective · Controller board defective
851
C
853
C
854
C
855
C
856
C
857 866
C C
867
B
· IEEE1394 interface board defective · Controller board defective IEEE802.11b error - card not detected (power-on) Wireless LAN card not detected at · Poor connection power-on. · Defective wireless LAN card · Defective controller IEEE802.11b error - card not detected (during operation) Wireless LAN card not detected during · Poor connection operation. · Defective wireless LAN card · Defective controller IEEE802.11b error Wireless LAN card error detected. · Poor connection · Defective wireless LAN card · Defective controller IEEE802.11b interface board error Wireless LAN interface board error · Poor connection detected. · Defective wireless LAN interface board USB I/F Error USB interface error detected. · Defective controller SD card authentication error The SD card does not contain a correct · Data corruption license code. SD card access error 1 After the program saved in the SD card · SD card removed starts running, the SD card is removed from the slot.
B121/B122/B123
4-8
SM
SERVICE CALL CONDITIONS
No. Definition 868 B Symptom SD card access error 2 Incorrect data is detected in the SD card. Address Book Data Error Address book data stored on the hard disk was detected as abnormal when it was accessed from either the operation panel or the network. FCU Flash ROM Error The address book written into the flash ROM mounted on the FCU is detected as defective. Electrical total counter error The electrical total counter does not work properly. Mechanical total counter The mechanical total counter does not work properly. Possible Cause · SD card defective · SD controller defective · Software defective
870
C
871
C
· Flash ROM device defective · Replace flash ROM on the MBU · NVRAM on the GW controller board defective · Mechanical total counter defective · BICU defective · Disconnected mechanical total counter · NVRAM on the BICU defective · Printer application program defective · Hardware configuration incorrect (including memory shortage) · Font file not installed · Data corruption · Memory defective · BICU defective · Poor connection between BICU and memory · IMAC on the GW controller board defective · BICU defective · Poor connection · Application program defective
900
B
901
B
903
B
920
C
Engine total counter error The checksum of the total counter is not correct. Printer error A fatal error is detected in the printer application program Printer font error Necessary font files are not found. Net file error The net-file management-file contains a fatal error. Memory error The machine detects a discrepancy in the write/read data during its write/read test (done at power off/on and at recovery from low power or night/off mode). IMAC hardware error A memory control job is not completed within a certain period.
921 925
C C
928
B
929
B
954
B
955
B
Printer application program error The printer status does not become ready when the printer application program is necessary for image processing. Image transfer error The controller is not able to transfer images when the engine needs them.
· Application program defective
SM
4-9
B121/B122/B123
Troubleshooting
SERVICE CALL CONDITIONS
No. Definition 964 B Symptom Status error (laser optics housing unit) The optics housing unit does not become ready within 17 seconds after the request. NVRAM error The machine detects a discrepancy in the NVRAM write/read data when attempting to save actual data to the NVRAM (i.e. during actual use). Localization error The localization settings in the nonvolatile ROM and RAM are different (! SP5-807-1). Print image transfer error Print images are not transferred. Possible Cause · Software defective
981
B
· NVRAM defective · Poor connection between BICU and NVRAM · NVRAM is not connected · BICU defective · First machine start after the NVRAM is replaced · Incorrect localization setting · NVRAM defective · Controller defective · BICU board defective · Poor connection between controller and BICU · · · · Software defective Internal parameter incorrect Insufficient working memory When this SC occurs, the file name, address, and data will be stored in NVRAM. This information can be checked by using SP7-403. Note the above data and the situation in which this SC occurs. Then report the data and conditions to your technical control center.
982
B
984
B
990
B
Software performance error The software attempted to perform an unexpected operation.
991
D
992
B
997
B
Software continuity error The software attempted to perform an unexpected operation. However, unlike SC990, the object of the error is continuity of the software. Unexpected Software Error Software encountered an unexpected operation not defined under any SC code. Application function selection error The application selected by a key press on operation panel does not start or ends abnormally.
· No operation required. This SC code does not appear on the panel, and is only logged.
· Software defective · An error undetectable by any other SC code occurred · Download the firmware for the application that failed · An option required by the application (RAM, DIMM, board) is not installed
B121/B122/B123
4-10
SM
SERVICE CALL CONDITIONS
No. Definition 998 B Symptom Application start error After power on, the application does not start within 60 s. (All applications neither start nor end normally.) Program download error The download (program, print data, language data) from the IC card does not execute normally. Possible Cause · Download controller firmware · Replace the controller board · An option required by the application (RAM, DIMM, board) is not installed · Board installed incorrectly · BICU board defective · Controller board defective · IC card defective · NVRAM defective · Loss of power during downloading Important Notes About SC999 · Primarily intended for operating in the download mode, logging is not performed with SC999. · If the machine loses power while downloading, or if for some other reason the download does not end normally, this could damage the controller board or the PCB targeted for the download and prevent subsequent downloading. If this problem occurs, the damaged PCB must be replaced.
999
B
SM
4-11
B121/B122/B123
Troubleshooting
ELECTRICAL COMPONENT DEFECTS
4.2 ELECTRICAL COMPONENT DEFECTS
4.2.1 SENSORS
Component Registration CN 111-2 (BICU) Relay 111-5 (BICU) Upper Paper End Open 114-2 (BICU) Shorted Vertical Transport Open Shorted Condition Open Shorted Symptom The Paper Jam message will appear whenever a copy is made (paper hasn't reached the sensor). The Paper Jam message appears even if there is no paper at the sensor. The Paper Jam message will appear whenever a copy is made except for 1st and by-pass tray feeding. The Paper Jam message appears even if there is no paper at the sensor. The Paper End indicator lights when the 1st paper tray is selected, even if there is paper in the tray. The Paper End indicator does not light when the 1st paper tray is selected, even if there is no paper in the tray. The Paper Jam message will appear whenever a copy is made from the 1st paper tray. The Paper Jam message will appear whenever a copy is made from an optional paper tray unit. The Paper Jam message appears even if there is no paper at the sensor. The Paper End indicator lights when the 2nd paper tray is selected, even if there is paper in the tray (B122/B123 models only). The Paper End indicator does not light when the 2nd paper tray is selected, even if there is no paper in the tray. The Paper Jam message will appear whenever a copy is made from the 2nd paper tray (B122/B123 models only). The Paper End indicator lights when the bypass tray is selected, even if there is paper in the tray. The Paper End indicator does not light when the bypass tray is selected, even if there is no paper in the tray. The Paper Jam message will appear whenever a copy is made from the bypass tray. The Paper Jam message will appear whenever a copy is made (paper hasn't reached the sensor). The Paper Jam message appears even if there is no paper at the sensor. SC390 is displayed. The toner density control process is changed (see the note below the table).
4-12 SM
110-2 (BICU)
Open Shorted Open
Lower Paper End
113-6 (BICU)
Shorted Shorted
By-pass Paper End 136-7 (BICU)
Open
Shorted Exit 124-2 (BICU) Toner Density Image Density 125-3 (BICU) 123-2 (BICU) Open Shorted Open Shorted Open Shorted
B121/B122/B123
ELECTRICAL COMPONENT DEFECTS
Component Scanner H.P. Platen Cover 102-5 (BICU) Original Width Original Length Duplex Entrance 222-2 (DCB) Duplex Exit 222-5 (DCB) Duplex Inverter 220-6 (DCB) Open Shorted Open Shorted Open Shorted CN 102-2 (BICU) Condition Open Shorted Open Shorted Open Shorted Open Shorted Symptom SC120 is displayed. APS and Auto Reduce/Enlarge do not function correctly. If the Start button is pressed with the platen cover or A(R)DF closed, "Cannot detect original size" is displayed. The CPU cannot detect the original size properly. APS and Auto Reduce/Enlarge do not function correctly. The CPU cannot detect the original size properly. APS and Auto Reduce/Enlarge do not function correctly. The Paper Jam message will appear whenever a duplex copy is made (paper hasn't reached the sensor). The Paper Jam message appears even if there is no paper at the sensor. The Paper Jam message will appear whenever a duplex copy is made (paper hasn't reached the sensor). The Paper Jam message appears even if there is no paper at the sensor. The Paper Jam message will appear whenever a duplex copy is made (paper hasn't reached the sensor). The Paper Jam message appears even if there is no paper at the sensor.
103-3,4 (BICU) 103-8,9 (BICU)
NOTE: SC392 is activated when the CPU detects an ID sensor error during developer initialization (SP2-214). However, SC392 is not displayed on the LCD but simply logged in the SC log (SMC printout), unless the technician exits SP Mode as soon as an error message is displayed.
SM
4-13
B121/B122/B123
Troubleshooting
BLOWN FUSE CONDITIONS
4.2.2 SWITCHES
Component Upper Paper Size Vertical Transport Door CN 1151,2,4 (BICU) 110-5 (BICU) 1131,2,4 (BICU) 1361,2,4,5 (BICU) 124-5 (BICU) Front/Right Cover Condition Open Shorted Open Shorted Open Shorted Open Open Shorted Open Shorted Open Shorted Symptom The CPU cannot detect the proper paper size, and misfeeds may occur when a copy is made from the 1st paper tray. The Cover Open indicator is lit even if the vertical transport door is closed. The Cover Open indicator is not lit even if the vertical transport door is opened. The CPU cannot detect the proper paper size, and misfeeds may occur when a copy is made from the 2nd paper tray. The CPU misdetects or is not able to detect the size of the paper set in the bypass tray, causing possible misfeeds when feeding from this tray. The Cover Open indicator is lit even if the right door is closed. The Cover Open indicator is not lit even if the right door is open. The Cover Open indicator is lit even if doors are closed. The Cover Open indicator is not lit even if doors are open. The machine does not turn on. The machine does not turn off.
Lower Paper Size By-pass Paper Size Right Door
130-1 (BICU) 281-3,4 (PSU)
Main
4.3 BLOWN FUSE CONDITIONS
Rating 120 V 220 240 V Power Supply Board FU1 15A/125V -- FU2 6.3A/250V 3.15A/250V Fuse FU3 FU4 FU5 FU6 FU7 FU8 1A/125V 4A/250V 4A/250V 4A/250V 4A/250V 3.15A/250V 1A/250V 4A/250V 4A/250V 4A/250V 4A/250V 3.15A/250V Symptom when turning on the main switch No response. No response. Anti-condensation/Tray Heater does not turn on. No response. No response. SC901 is displayed. Optional peripherals are detected but do not function. No response.
B121/B122/B123
4-14
SM
LED DISPLAY
4.4 LED DISPLAY
4.4.1 BICU
Number LED 1 Function Monitors the +5 V line for the CPU and the surrounding circuit. Usually, this LED is blinking.
SM
4-15
B121/B122/B123
Troubleshooting