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1
ADJUSTMENT
4 DIAGRAMS 3 SERVICE 2 ISW 1 ADJUSTMENT
1 ADJUSTMENT
ADJUSTMENT
HOW TO USE THE ADJUSTMENTS WHEN
ADJUSTMENT SECTION REPLACING PARTS
[1] Construction Adjustments (including checks) and settings are not only
required when a defective copy image occurs, but also
This section details adjusting items and procedures. Use after replacing or reinstalling certain parts.
this section for making adjustments and as a checklist
before implementing corrective measures in the field. [How to use the tables]
The following items are used in the tables throughout this
1. Does the power supply meet the requirements?
section.
2 ISW
2. Is the power supply properly grounded?
3. Is the machine sharing its power source with another 1. Mode
high current consumption machine that draws large Indicates the adjustment mode.
currents intermittently? (e.g. an elevator, air condi-
["25"] : 25 mode
tioner, or other source of electrical consumption)
4. Is the installation environment suitable? ["36"] : 36 mode
a. The machine must be installed in a well- ["47"] : 47 mode
ventilated place free from high temperature, high
2. Codes
humidity and direct sunlight.
3 SERVICE
b. The machine must be installed on a level floor. Indicates the applicable code and/or Copy Quantity
Setting button for each mode.
5. Does the cause of a defective image lie in the original
itself? 3. Conditions
6. Is the density adjusting control at the proper position? New: Indicates adjustment (including check) is
7. Are the original glass and RADF platen guide clean? required when replacing a new part.
8. Is the correct paper being used for the copy? Reset: Indicates adjustment (including check) is
9. Are the copying materials and parts replaced when required when a part has been re-installed.
they reach the end of their usable life? (developer,
4. Symbols used in the tables
drum, cleaning blade, etc.)
2 ................. : Indicates there is a priority
4 DIAGRAMS
1
10. Is there toner in the toner cartridge?
sequence for adjustments
The following items should also be observed when (including checks) and settings.
repairing the machine. (Empty circle) : Indicates adjustments (including
1. Only one side of the AC power line is disconnected checks) and settings that can be
when the main power of this machine is turned off. carried out independently.
Always unplug the machine before beginning work. If
absolutely necessary to work with the power on,
exercise care to avoid being caught in the scanning
rear of the exposure unit.
2. Special care should be taken when handling the
fixing unit since it operates at extremely high
temperatures.
3. The developing unit is surrounded by a strong
magnetic field. Keep watches and metering
equipment away from it.
4. Avoid scarring the drum with tools or similar objects.
5. Do not touch IC pins with your bare hands.
1-1
1 ADJUSTMENT
ADJUSTMENT
LIST OF ADJUSTMENT ITEMS
Vertical magnification adjustment (printer, platen)
Horizontal magnification adjustment (platen)
Restart timing adjustment (copier system)
Leading edge original erasure adjustment
Vertical magnification adjustment (RADF)
Paper feed loop amount adjustment
2 ISW
RADF scanning density adjustment
Restart timing adjustment (RADF)
Sensor-related counter clearing
Fixing-related counter clearing
Electrical RDH memory check
Image read point adjustment
Adjustment setting items
L detection adjustment
Centering adjustment
PM counter reset
PM cycle set
3 SERVICE
Mode 25 25 36 36 36 36 36 36 36 36 36 36 36 36 36 47
Part name
Code 2-1 2-2 1 2-1 2-1 2-1 2-2 2-2 2-3 2-4 2-5 2-6 6-2 8-1 8-2 198
Drum New
Developer New *2
Fixing unit-related parts New
Writing unit New/Re 1 2 3 4 5 6 7
Parameter memory substrate New *1 1 2 3 4 5 6 7 8 9
4 DIAGRAM
Paper feeding-related rubber rollers New 1 2 3
RADF New/Re 1 2 3 4 5 6 7
RADF slit glass New
Electronic RDH New/Re