VI
- 17
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 machine. 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) 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.
(2) When disconnecting the connectors, do not pull the lead wires but hold the connector
housings.
(3)
l
Before handling the PCBs, touch a metal portion of the machine to discharge static electricity
charged in your body.
l
When repairing the PCBs, handle them with extra care.
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 given in Subsection 2.4, make the following
initial checks:
Environmental conditions
Check that:
(1) The machine is placed on a flat, firm surface.
(2) The machine is used in a clean environment at or near normal room temperature (10
°
C to
32.5
°
C) with normal relative humidity (20 to 80%).
(3) The machine is not subjected to rapid change of the ambient temperature. (Moving the
machine from a cold place to warm place will cause condensation inside the machine. If it
takes place, leave the machine in the warm place for approx. two hours before turning on the
power.) Turning the machine on with dew condensation will result in damaged electronic
devices.
(4) The machine is not exposed to direct sunlight or harmful gases.
Power requirements
Check that:
(1) The power supply specified on the rating plate located on the bottom of the machine is used.
The supply voltage stays within the rating ±10%.
(2) Each voltage level on AC input lines and DC lines is correct.
Summary of Contents for DCP-1400
Page 1: ...MULTI FUNCTION CENTER SERVICE MANUAL MODEL MFC9800 MFC9700 DCP1400 MFC9880 MFC9860 MFC9760 ...
Page 5: ...CHAPTER I GENERAL DESCRIPTION ...
Page 24: ...CHAPTER II INSTALLATION ...
Page 29: ...CHAPTER III THEORY OF OPERATION ...
Page 31: ...III 1 1 OVERVIEW Provided on models supporting facsimile function ...
Page 35: ...III 5 2 2 Laser Printing Mechanism 2 2 1 Paper pick up and registration mechanism ...
Page 44: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 106: ...IV 60 Setting up the main PCB after replacement ...
Page 116: ...IV 70 ...
Page 118: ...IV 72 2 Scanner mount ...
Page 119: ...IV 73 3 Drive gear ASSY ...
Page 120: ...IV 74 4 Paper cassette ...
Page 121: ...CHAPTER V MAINTENANCE MODE ...
Page 129: ...V 7 Scanning Compensation Data List ...
Page 137: ...V 14 1 MFC9760 Key Button Entry Order 2 ...
Page 145: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Page 174: ...VI 28 Location of High voltage Contacts and Grounding Contacts ...
Page 175: ...VI 29 ...
Page 176: ...MFC9800 MFC9700 DCP1400 MFC9880 MFC9860 MFC9760 Appendix 1 EEPROM Customizing Codes ...
Page 179: ...MFC9800 MFC9700 DCP1400 MFC9880 MFC9860 MFC9760 Appendix 2 Firmware Switches WSW ...
Page 229: ...A Main PCB 1 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 230: ...A Main PCB 2 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 231: ...A Main PCB 3 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 232: ...A Main PCB 4 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 233: ...A Main PCB 5 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 234: ...A Main PCB 6 6 MFC9800 MFC9880 MFC9860 MFC9760 ...
Page 235: ...A Main PCB 1 6 MFC9700 DCP1400 ...
Page 236: ...A Main PCB 2 6 MFC9700 DCP1400 ...
Page 237: ...A Main PCB 3 6 MFC9700 DCP1400 ...
Page 238: ...A Main PCB 4 6 MFC9700 DCP1400 ...
Page 239: ...A Main PCB 5 6 MFC9700 DCP1400 ...
Page 240: ...A Main PCB 6 6 MFC9700 DCP1400 ...
Page 241: ...B Relay PCB ...
Page 242: ...C Engine PCB ...
Page 243: ...D NCU PCB U S A Canada ...
Page 245: ...D NCU PCB Asia Oceania 1 2 ...
Page 247: ...E Control Panel PCB MFC9800 MFC9860 MFC9880 ...
Page 248: ...E Control Panel PCB 1 2 DCP1400 MFC9760 ...
Page 249: ...E Control Panel PCB 2 2 DCP1400 MFC9760 ...
Page 250: ...E Control Panel PCB 1 2 MFC9700 ...
Page 251: ...E Control Panel PCB 2 2 MFC9700 ...
Page 252: ...F Power Supply PCB 100 120V Low voltage power supply ...
Page 253: ...F Power Supply PCB 200 240V Low voltage power supply ...
Page 254: ...F Power Supply PCB High voltage power supply ...