Minolta 1052 Troubleshooting

EPlO52

TROUBLEStiOOTING

MINOUA

1158SBTOOOBA

1 1

INTRODUCTION

*:Only

when options are used

I-1. General Precautions

1-2. How to Use This Book I-3. Reading

I/O

PORT CHECK

2-l. Method for Checking the Control Parts with Loads 2-2.

I/O

3 1 PAPER TRANSPORT FAILURE

Paper

I-l. Misfeed Detected When Copier is Turned ON 1-2. Copier Take-Up Misfeed

I-3. Bypass Port Misfeed (*Multi Bypass Table)

1-4. Transport/Separator Misfeed I-5. Fusing/Exit Misfeed

Wrinkles in Paper

Double Feed

SkewedFeed

4 MALFUNCTIONS

Self-Diagnostic Function

1-I.

1-2.

I-3.

1-4.

1-5.

I-6. CO500:

1-7. CO600:

theText

Port Check List

Misfeed

...............................................

03000:

cooo1: coo1 0: coo1 1:

coo4c:

coo70:

coo71

co400:

co41 0: co51 0:

CO520:

CO61 0:

CO620:

Main Drive Motors failure to turn _ _ . . . . . . . . I . . . . . . . I T-25

Main Drive Motor turning at abnormal timing

PC Drive Motors failure to turn . . . . . . . . . . . . . . . . . . . . T-27

PC Drive Motor turning at abnormal timing

Cooling Fan Motors failure to turn . . . . . , . . . . . . . . . . . T-29

Toner Replenishing Motors failure to turn . . . . . . . . . . . T-31

Toner Replenishing Motor turning at abnormal

timing

Exposure Lamps failure to turn ON . . . . . . . . . . . . , . , . T-33

Exposure Lamp turning ON at abnormal timing

Warming-up failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-35

Abnormally low fusing temperature Abnormally high fusing temperature

Scanner Motor malfunction. . . . . . . . . . . . . . . . . . . . . . . T-37

Lens Motor malfunction Mirror Motor malfunction

........................................

......................................

...........................................

.........................................

...............................................

.................................

.................

.............................

.....................................

...........................................

.....................................

..............

...............

T-l T-l T-l

T-2 T-4

T-7 T-l 0 T-l 1

T-14 T-l 6 T-19 T-21 T-21 T-22

T-23

1-8.

COFI

0: Faulty AE Sensor level . . . . . . . . . . . . . . . . . . . . . . . . . . . T-39

COF30: ATDC Sensor malfunction

1-9.

COF02: Original size detection error (Defective CPU) . . . . . . . . T-41

COFEI

To COFFF: Original Size Detecting Sensor failure

Power is not Turned ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-43

El,E2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-45

1139SBTOlOOA

INTRODUCTION

1139SBTOlOlA

l-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 unplugging connectors, make sure that the power cord of the copier has been unplugged from the wall outlet.

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 the wall outlet of the same line, take necessary steps to prevent the circuit breaker from opening due to overloads.

6. Keep all disassembled parts in good order and keep tools under control so that none will be lost or damaged.

1139SBT0102A

1-2. How to Use This Book

If a 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 procedure applicable within the defective unit.

2. All troubleshooting procedures contained herein assume that there are no breaks in the harnesses and cords and all connectors are plugged into the right positions.

3. For the removal procedures of covers and parts, see

4. The troubleshooting procedures are given in the order of greater frequency of trouble or order of operation.

5. The procedures preclude possible malfunctions due to noise and other external causes.

1139SBT0103A

1-3. Reading the Text

The paper the location where the paper is present and start the procedure 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

Step Check Item

1 2

I I

transport failure

Is--?

Go to step 2 if it checks okay.

troubleshooting procedures are given according to the symptom. First identify

Result

1 YFS 1

Do this.

Action

DISREASSEMBLY,

Pattern 2

ADJUSTMENT.

forthat

particular location. For malfunction

T-l

1151SBT0200A

I/O

PORT CHECK

1158SBT0201A

2-1. Controlled Parts Check Procedure

To allow the Tech. Rep. to easily and safely determine whether a particular controlled part is fully operational, this copier provides the following provision: the check of the data of the the board IC with the copier in the standby state (including a misfeed, malfunction, and closure failure condition) allows the Tech. Rep. to determine whether a signal is properly input to, and output from, a controlled part.

cProcedure>

When a paper misfeed or malfunction occurs, identify the part by going over the text or Select the port identified in step 1). Check the input or output port data to determine whether the controlled part is operational and signals are properly input and output.

I/O

Check function of the Service mode and show on the Touch Panel the status of the

I/O

port check list.

I/O

port of the possibly defective controlled

I/O

port on

I/O

T-2

---c_--~~----------------~----

Example:

When a paper misfeed occurs in the paper take-up section of the copier, Paper Take-Up Sensor PC55 is considered to be responsible for it.

Remove the sheet of paper misfed. From the

I/O

port check list, it is found that the H/L input signal to PC55 is supplied from PWB-A

(IC4A) APAI.

Select the show the status of PWB-A Checkthat the second LED from the right of the Exposure Information Display lights up (sensor being unblocked).

Move the PC55 actuator to block the sensor. Check at this time that the LED goes out.

I/O

Check function from the Service mode menu and, using the Paper Select key,

(IC4A) APAl

Zoom Ratio Indicator

Multi-Copy Display

. Exposure Information Display

ON: PC55 is faulty. OFF: PC55 is operational.

on the control panel.

L/

-------__-__---___---_--__-__

T-3

1158SBT0202A

2-2. Port Check List

(Copier)

Name

PC Drive Motor PC Drive Motor lock signal

Main Drive Motor

Main Drive Motor lock signal

Optical Section Cooling Fan Motor

Suction Fan Motor

Scanner Motor

Lena Motor

Mirror Motor

Toner Replenishing Motor

Cooling Fan Motor

Cooling Fan Motor lock signal

Separator Solenoid

SLl

Paper Take-Up Solenoid

SL2

BPA5 BPA

OUT0

APC2

BPA6

BPA4

st Drawer paper take-up LED on the Monitor

Magnification Multi-Copy

Ratio Indicator

P471

P4 1 P67 P43 P66 P6 P43 P4 P43 P61 P62 P61 P62 P61 P62

OUT

APC BPA BPA

P6 P4

P4 P6

Displav

liahts up.

Manual Exposure

Display

q mclc

[7mcl1clclc

nnnnr

GIL--_

q ucloG_

1

cl00011

1

clclclnoo

? ? t 1 t

1

cloclclclcl

1

cl0017cl10

nnnnnn

____--U[

1

I7noncl1oclmo

1

clcloouo~clo

clclclmclclclclcl

q clclnoooom

~~~~~~~~

q nanooooo OFF ON

~~~~~~~~

Indicator

1~~~~~

~~~_

] n n

___.-lmI

]nn

lmnrlclcJclC

MIICIIC

Operation Characteristics

OFF

When locked When turnedPJl2A-7

OFF ON

When locked When turned

OFF ON

OFF

CIC

InI

OFF ( ON

-When locked When turned

OFF ON

CN/PJ

OFF

ON PJ6A-6

PJ12A-6

PJ12A-10 PJ12A-9 PJ32A-2

PJ16A-1

PJ6A-9 PJGA-11

14A-2

PJ7A-9

No.

Symbol

SL51

Name

Manual Feed Paper Take-Up Solenoid (down)

Port No.

PBO

Magnification Multi-Copy

Ratio Indicator Display

Manual Exposure

Indicator

tl~~~Ic]~~~

Operation Characteristics

OFF

,o, ON

CNlPJ No,

PJ12A-8

SL51

CL?

CL2 CL51 PC31

PC51

PC53

PC54

PC55

PC57

Manual Feed Paper Take-Up Solenoid

(up)

Synchronizing Roller Clutch Paper Transport Clutch Manual Feed Paper Take-Up Clutch Manual Feed Paper Empty Sensor

Transport Roller Sensor

Paper Exit Sensor

Paper Leading Edge Detecting Sensor

Paper Take-Up Sensor

Right Door Detecting Sensor

PBl

BPAO

BPAl

PB2

APC3 APC

APC7

APC5

APC6

APAl

APAO

BPA

1

APA

APA 4A When

1

~~~~0~~~

q oouooonm

1

~~~~~~~~

00n~~mnn

1

q oooomooo un;;ELed

mo~1ooooo

1

q oomooooo un;;ELed

1

q omoooooo

1

q oouonnmo

OFF ON

OFF ON PJ6A-8

OFF ON

OFF

un;;iced

un;;f=Led

unt;t-=Led

OFF

When

blocked

When PJ18A-6

blocked

When

blocked

When

blocked

When

blocked

PJ12A-lt

16A-3

PJ21 A-2

PJllA-6

PJ7A-2

PJ16A-3

Symbol

PC81

Name

Scanner Reference Position Sensor

Port No.

APB0 APB 4A

Magnification Multi-Copy

Ratio Indicator

Display

Manual Exposure

Indicator

Operation Characteristics

OFF

When

blocked

CN/PJ

PJ22A-1

No.

PC86

PC90

PC101

PC112

Mirror Reference Position sensor

lena

Reference Position Sensor

Paper Empty Sensor

Toner Hopper Home Position Sensor

APB2

APB1 APB 4A

APA

APB6

APA

APB

1

q oonnooo

When

blocked

When

blocked

When

blocked

ur$%ed bEEE:d

PJ20A-2

PJ20A-5

PJ7A-6

PJ22A-10

1151SBT0300A

PAPER TRANSPORT FAILURE

1158SBT0301A

1. Paper Misfeed

When a paper misfeecl occurs in the copier, the corresponding Misfeeci Location Monitor LED on the control panel blinks to let the user know where the misfeed has occurred. If an LED lights up steadily, it indicates that there might be a sheet of paper present at that particular location in the copier. If a paper misfeed occurs very frequently, carry out the necessary troubleshooting procedures according to the location of the misfeed.

Blinking

LED

Blinking Light

Steady Light

-I--

11580005AA

Misfeed Locatlon

Paper take-up/Bypass port/Vertical

transoort/Transoort/SeDarator/Fusinn/Exit

There is a misfeed at that location.

There might be a sheet of paper stopped at that location.

T-7

The paper misfeed, is detected by the following sensors.

Paper Exit Sensor PC53

*:When

option is installed

(Exit/Duplex Switching Unit)

Paper Leading

Edge Detecting

Sensor PC54

Transport Roller

Sensor PC51 Paper Take-Up

Sensor PC55

T-8

Here is an at-a-glance listing of misfeed detections made by the various sensors of the copier.

A: Misfeed Detected in Conjunction with Leading Edge Detection

Sensor

Blinking LED

B: Misfeed Detected in Conjunction with Trailing Edge Detection

Blinking LED

Location

Before the Paper

Take-Up Sensor

Before the

Transport Roller

Before the Paper Leading Edge Detecting Sensor

From Image

Transfer Corona to detection by the

Fusing Unit

Location

Vertical Transport

Section

Near the Transport Roller Sensor

Near the Paper Leading Edge Detecting Sensor

From the Suction to Fusing Unit

Description

Take-up failureIPaper take-up start

Leading edge detection by the Transport Roller Sensor Sensor

Leading edge detection by the Paper Leading Edge Detecting Sensor

Leading edge

Paper Exit Sensor

Description

Trailing edge detection by the

Paper Take-Up

Sensor Trailing edge

detection by the Transport Roller Sensor

Trailing edge detection by the

Paper Leading Edge Detecting Sensor

Trailing edge detection by the

Paper Exit Sensor

Timer Start

Leading edge

detection by the

Paper Take-Up

Leading edge detection by the Transport Roller Sensor

TRON signal

Timer Start Sensor Timing

Leading edge detection by the Paper Take-Up Sensor

TRON signal

Trailing edge detection by the Transport Roller Sensor

Trailing edge detection by the Paper Leading

Edge Detecting

Sensor

Paper Take-Up Sensor (leading edge)

Transport Roller Sensor (leading edge)

Paper Leading Edge Detecting Sensor (leading edge)

Paper Exit Sensor (leading edge)

Paper Take-Up Sensor (trailing edge)

Transport Roller Sensor (trailing edge)

Paper Leading Edge Detecting Sensor

(trailing edge)

Paper Exit Sensor (trailing edge)

Timing

T-9

1158SBT030101A

I-1. Misfeed Detected When Copier is Turned ON

11580005AA

Lit LED Paper Location Sensor

Drawer

Transport Roller

Synchronizing Roller Paper Leading Edge See step 2 on p. T-i 7

Exit Section Paper Exit Sensor PC53 See step 8 on p. T-20

Paper Take-Up Sensor PC55

Transport Roller Sensor PC51

Detecting Sensor PC54

Action

See step 10 on p. T-i 3 (Copier Take-Up Misfeed Clearing Procedure).

See step 14 on p. T-l 3 (Copier Take-Up Misfeed Clearing cedure).

(Transport/Separator Misfeed Clearing Procedure).

(Fusing/Exit Misfeed Clearing Procedure).

Pro-

T-10

1158SBT030102A

1-2. Copier Take-Up Misfeed

CN_25

Symbol

PC51 PC55

SL2

CL2

PWB-A

Transport Roller Sensor

Name

Paper Take-Up Sensor Paper Take-Up Solenoid Paper Transport Clutch Main Control Board

T-11

PJ7A

1158COlTAA

Copier Take-Up Misfeed Clearing Procedure

Symptom

Paper is not taken

up at all.

Paper is

stationary before the Paper Take-Up Sensor.

Continued on next page

Step Check Item

Is the paper being used up

to product specifications?

Is the pafer curled, waved, or damp.

Are the Separator Fingers

on both sides of the Drawer in position?

Are the Separator Fingers

deformed? Is the Trailing Edge Stop or

Edge Guide in good position?

Are the Paper Lifting

Springs positioned correctly?

Are the Paper Take-Up

Rolls deformed, worn, or

dirty with paper dust? Is a signal being output

from PWB-A to the Paper Take-Up Solenoid?

Does the voltage across

PJ7A-9

on PWB-A and

GND change from to DCOV when the Start Key is pressed?

Is the Clutch Spring

deformed or worn?

DC24V

R@SUll:

Instruct the user to use the

paper that is up to product specifications.

Change the paper.

YES

Instruct the user in how to

store the paper.

Instruct the user to load the

paper so that it rests under the Fingers.

Replace the Fingers.

YES

Instruct the user in how to

gu;)stn

the Edge Stop or

Change the position of the

Spring or add one as necessary.

Clean or replace the Paper

YES

Take-Up Rolls.

Adjust the Solenoid stroke. Check the Solenoid.

YES

Replace PWB-A.

Replace the Clutch Spring.

YES

Action

T-12

Symptom

Paper is

stationary before the Vertical Transport Roller.

Paper is

stationary at the Vertical Transport

Roller.

step

1 1

Check Item Result Action

YES

Check Paper Take-Up sor

(PC55).

PC55: PWB-A

Are the Vertical Transport Clean or replace the Rollers deformed, worn, or dirty with paper dust?

Are the Paper Take-Up Clean, correct, or replace Guide Plate and Vertical Transport Guide Plate dirty or deformed?

Is a signal being output from PWB-A to the Clutch?

* Does the voltage across

Seep.T-3.

PJ6A-2

on PWB-A and GND change from to DCOV when the Start Key is pressed?

Sen-

(IC4A) APAl

DC24V

Replace PWB-A. Check the Actuator for

operation.

Check the Paper Take-Up Sensor.

Vertical Transport Rollers.

YES

the Guide Plate.

YES

Check the Clutch.

YES

Replace PWB-A.

Paper is

stationary near the Transport

Roller.

Check Transport Roller Replace or check the Sensor PC51 See p. T-3 (PWB-A

(IC4A)

Are the Transport Rollers deformed, worn, or dirty

with paper dust?

APC7).

YES

PWB-A. Check the Actuator for

operation.

Check Clean or replace the

Transport Rollers.

YES

PC51.

T-13

+ 35 hidden pages

Minolta 1052 Troubleshooting

CONTENTS

INTRODUCTION

PAPER TRANSPORT FAILURE