How To Use This Section; Scope And Precautions; Adjustments Made When Replacing Parts; How To Read Tables - Minolta Di551 Service Manual

HOW TO USE THIS
SECTION

[1] Scope and Precautions

This section provides detailed information about
adjustment items and procedures. Before addressing
customer complaints, perform the following checks.
1. Check whether the power supply voltage meets
the specifications.
2. Check whether the power supply is properly
grounded.
3. Check whether this machine shares the power
supply with any other machine that draws large
current intermittently (e.g., elevator and air con-
ditioner that produce electrical noise).
4. Check whether the installation environment is
good.
a. High temperature / High humidity, direct sun-
light, ventilation, etc.
b. Level of installed location
5. Check whether original has a problem that may
cause defective images.
6. Check whether the selected density value is correct.
7. Check whether the platen glass, slit glass, etc. is
soiled.
8. Check whether correct paper is used for copying.
9. Check whether copying materials and parts
(e.g., developer, drum, and cleaning blade) are
replenished and replaced when they reach the
end of their useful life.
10. Check whether toner remains.
When servicing the machine, observe the following
precautions:
1. Only either side of the AC line is shut off when the
main power of this machine is turned off. Always
unplug the power cord before starting service
work. If it is necessary to service the machine
with the power on, take care not to be caught in
the scanning gear of the exposure unit.
2. Special care should be taken when handling the
fixing unit because it operates at extremely high
temperatures.
3. The developing unit has a strong magnetic field.
Keep watches and measuring equipment away
from it.
4. Take care not to damage the drum with tools and
so on.
5. Do not touch IC pins with bare hands.
ADJUSTMENTS MADE
WHEN REPLACING
PARTS
Adjustments (including checks) and settings are not
only required when a customer complaint about the
copy image quality is received, but also after replacing
or reassembling parts.

[1] How to Read Tables

Components of the tables used in this section are as
follows:
1. Mode
Adjustment mode to be selected.
[P]: P mode
[25]: 25 mode
[36]: 36 mode
[47]: 47 mode
2. Code
Code and copy quantity setting button used in
each mode.
3. Page
Page in the "ADJUSTMENT" section.
4. Circled numbers
1 2 Indicate that adjustments (including
checks) must be made in order of pre-
cedence.
(Circle without numeric character):
Indicates that adjustments (including
checks) can be made independently.
2-1
ADJUSTMENT