Minolta EP1030 - Introduction to Troubleshooting; General Precautions for Troubleshooting; Paper Transport Failure Diagnosis; Misfeed Detection Types and Detection Timings

1139SBTO100A
im (INTRODUCTION
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1-1. General Precautions
1. When servicing the copier with its covers removed, use utmost care to prevent your hands, clothing, and
tools from being caught in revolving parts Including the chains and gears.
2. Before attempting to replace parts and unplug connectors, make sure that the power cord of the copier
has been unplugged from the wall outlet.
3. Never create a closed circuit across connector pins except those specified in the text and on the printed
circuit.
4. When creating a closed circuit and measuring a voltage across connector pins specified in the text, be
sure to use the green wire (GND).
5. When the user is using a word processor or personal computer from a wall outlet of the same line, take
necessary steps to prevent the circuit breaker from opening due to ovérloads.
6. Keep all disassembled parts in good order and keep tools under control so that none will be lost or dam-
aged. .
7, Adjust, choice, count, and other types of data are stored in TC3 (EEPROM) on Master Board PWB-A,
Keep this in mind and take necessary precautions when replacing PWB-A.
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1-2. How to Use This Book
. Ifa component on a PWB or any other functional unit including a motor is defective, the text only instructs
you to replace the whole PWB or functional unit and does not give troubleshooting procedures applicable
within the defective unit.
2. Alltroubleshooting procedures contained herein assume that there are no breaks in the harnesses and
cords and all connectors are plugged into the right positions.
For the removal procedures of covers and parts, see DIS/REASSEMBLY, ADJUSTMENT.
. The troubleshooting procedures are given in the order of greater frequency of trouble or order of opera-
tion.
~~
@
5. The procedures preclude possible malfunctions dué to noise and other external causes.
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1-3. Reading the Text
1. The paper transport failure troubleshooting procedures are given according to the symptom. Firstidentify
the location where the paper is present and start the procedure for that particularlocation. Formalfunction
troubleshooting, start with step 1 and onward. ;
2. Make checks in numerical order of steps and, if an item Is checked okay, go to the next step.
Pattern 1 Patten 2
step] | Resuit_| Action | [step] checkitem | Result _|
is.2
t | NO _| Check that.
tT.
Go to step 2 if you answered NO.
Go to step 2 if it checks okay.
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Ym PAPER TRANSPORT FAILURE
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2-1. Misfeed Detection Types and Detection Timings
When a misfeed occurs, the corresponding misfeed code (the appropriate one of those shown below)
starts blinking to let the user know where the misfeed has occurred.
Misfeed Code Type Detection Timing
Paper take-up misfeed ® Paper Transport Sensor PC2 is not blocked (L) even
or Paper empty after the lapse of approx. 3.3 sec. after Paper
Take-Up Solenoid SL2 has been energized.
© Paper Transport Sensor PC2 is not blocked (L) even
after the lapse of approx. 1.6 sec. after Multi Bypass
Paper Take-Up Solenoid SL3 has been energized.
© Paper Exit Sensor PCS is not blocked (L) even after
the lapse of approx. 2 sec. after Registration Clutch
CL1 has been energized. :
@PC2 is not unblocked (H) even after the lapse of
approx. 2.9 sac. (Cassette) or 3.2 sec. (Manual by-
pass) after Registration Clutch CL1 has been ener-
gized.
© Paper does not move past Paper Exit Sensor PC3
even after the lapse of approx. 3 sec, after PC2 has
been unblocked (H).
@ PC3 remains blocked for approx. 2 sec. after CL.1 has
been energized.
© SDH Paper Transport Sensor PC23 Is not blocked (L)
even after the lapse of approx. 2.3 sec. after SDH
Paper Take-Up Solenoid SL10 has been energized.
@ SDH Original Exit Sensor PC24 is not blocked (L)
aven after the lapse of approx. 1.3 sec. after SDH
Registration Clutch CL10 has been energized.
# PC23 is not unblocked (H) even after the lapse of
approx. 4.4 sec. after CL10 has been energized.
@ PC24 is not unblocked (H) even after the lapse of
approx. 1.7 sec. after PC23 has been unblocked (H).
Transport misfeed
Exit misfeed
J
SDH misfeed