NEC NEFAX 671 Service Manual page 20

(1) Procedure of G3 mode communication ........................................... S-158
7-3. Table of reference code ........................................................................... S-159
7-4. How to analyze the T30 protocol monitor ................................................. S-160
TROUBLESHOOTING
1. INTRODUCTION .............................................................................................. T-1
1-1. Electric Components Check Procedures ................................................. T-1
(1) Sensors ............................................................................................ T-1
(2) Switches ........................................................................................... T-2
(3) Solenoids ......................................................................................... T-2
(4) Motors ............................................................................................. T-3
(5) Clutches ........................................................................................... T-4
1-2. Overall Control Configuration ................................................................... T-5
2. PAPER MISFEED ............................................................................................ T-6
2-1. Initial Check Items .................................................................................... T-6
2-2. ADF Unit Initial Check Items .................................................................... T-6
2-3. Paper Misfeed Displays ........................................................................... T-7
2-4. ADF Unit Paper Misfeed Displays ............................................................ T-8
2-5. Locations of Misfeed Detection Sensors .................................................. T-9
2-6. ADF Unit Locations of Misfeed Detection Sensors .................................. T-10
2-7. Misfeed Detection Timing and Troubleshooting Procedures ................... T-11
(1) Paper Take-Up/Transport Misfeed ................................................... T-11
(2) Fusing/Exit Misfeed .......................................................................... T-12
3. PAPER MISFEED(Document Feeder Section) ................................................. T-13
(1) The Original Timing ................................................................................... T-13
4. MALFUNCTIONS/WARNING .......................................................................... T-14
4-1. List of Malfunctions .................................................................................. T-14
4-2. Malfunction Detection Timing and Troubleshooting Procedures .............. T-16
(1) C0045: Fuser fan motor error .......................................................... T-16
(2) C0210: H.V. abnormal ..................................................................... T-17
(3) C0500: Fuser warm up error ............................................................ T-18
(4) C0510: Fuser temperature low ........................................................ T-19
(5) C0520: Fuser overheat .................................................................... T-20
(6) C1200: ASIC memory abnormal ...................................................... T-21
(7) C1300: Polygon mirror motor error .................................................. T-21
(8) C133B: Communication with option error ........................................ T-22
(9) C133C: Modem error ....................................................................... T-22
(10) C133D: ROM checksum error .......................................................... T-22
(11) C13F0: Laser error ........................................................................... T-23
(12) C1468: EEPROM error .................................................................... T-23
(13) C14A3: CIS LED malfunction ........................................................... T-24
5. MALFUNCTIONS RELATED TO POWER SUPPLY ....................................... T-25
5-1. Power is not Turned ON. .......................................................................... T-25
6. IMAGE QUALITY PROBLEMS ........................................................................ T-26
6-1. Troubleshooting Image Quality Problems ................................................ T-26
6-2. Initial Checks ............................................................................................ T-26
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