How To Use The Adjustment Section; Construction; Adjustments When Replacing Parts - Konica Minolta 7020 Service Manual

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HOW TO USE THE
ADJUSTMENT SECTION
[1]

Construction

This section details adjusting items and procedures. Use
this section for making adjustments and as a checklist
before implementing corrective measures in the field.
1. Does the power supply meet the requirements?
2. Is the power supply properly grounded?
3. Is the machine sharing its power source with another
high current consumption machine that draws large
currents intermittently? (e.g. an elevator, air condi-
tioner, or other source of electrical consumption)
4. Is the installation environment suitable?
a. The machine must be installed in a well-
ventilated place free from high temperature, high
humidity and direct sunlight.
b. The machine must be installed on a level floor.
5. Does the cause of a defective image lie in the original
itself?
6. Is the density adjusting control at the proper position?
7. Are the original glass and RADF platen guide clean?
8. Is the correct paper being used for the copy?
9. Are the copying materials and parts replaced when
they reach the end of their usable life? (developer,
drum, cleaning blade, etc.)
10. Is there toner in the toner bottle?
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The following items should also be observed when
repairing the machine.
1. Only one side of the AC power line is disconnected
when the main power of this machine is turned off.
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.
ADJUSTMENTS WHEN
REPLACING PARTS
Adjustments (including checks) and settings are not only
required when a defective copy image occurs, but also
after replacing or reinstalling certain parts.
[How to use the tables]
The following items are used in the tables throughout this
section.
1. Mode
Indicates the adjustment mode.
["25"] : 25 mode
["36"] : 36 mode
["47"] : 47 mode
2. Codes
Indicates the applicable code and/or Copy Quantity
Setting button for each mode.
3. Conditions
New: Indicates adjustment (including check) is
required when replacing a new part.
Reset: Indicates adjustment (including check) is
required when a part has been re-installed.
4. Symbols used in the tables
................. : Indicates there is a priority
1 2
(Empty circle) : Indicates adjustments (including
4-1
ADJUSTMENT
sequence for adjustments
(including checks) and settings.
checks) and settings that can be
carried out independently.