Ph3130Service_part2.pdf

4 4. Troubleshooting

TROUBLESHOOTING

4.1 How to use DCU

4.1.1 DCU Setup

You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave

the connect the harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board.

ML SERIES DIAGNOSTIC CONTROL UNIT

DEV 300

LSU READY

PAPER EMPTY

DEV 350

LSU MT & LD

PAPER WIDTH

EXIT SENSOR

DEV 350

LSU MOTOR

NEW CRU

FEED SENSOR

SELF

TEST

COVER OPEN

COER HEATING

STATUS

PRINTING TEMP

READY HEAT

DIAGNOSTIC

OFF

DIAGNOSTIC CODE

STATUS CODE

WARM UP

MAIN MOTOR OPERATING SYSTEM

MAIN HIGH-VOLTAGE ON

TRNSFER HIGH-VOLTAGE (-)ON

THV(+) REFERANCE VOLTAGE

DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON

LSU OPERATING SYSTEM

PICKUP CLUTCH ON

PEEMPTY/PWITH/NEW CRU TEST

FEED & EXIT SENSOR TEST

COVER OPEN SENSOR TEST

FUSER TEST

HOT BURN TEST

CLEAN MODE PRINT

THV(+)TRIGGER, ALL HV & FAN ON

THV(+) REFERENCE ON

READY (REGAL)

READY (LETTER)

READY (A4)

READY (EXECUTIVE)

READY (B5)

PRINT START

FEED SENSOR ON

FEED SENSOR OFF

PAPER OUT

SLEEP MODE

ERROR STATUS CODE

OPEN FUSER ERROR

LOW TEMPERATURE ERROR

OVER HEATING ERROR

COVER OPEN ERROR

NO PAPERR

PAPER JAM 0

PAPER JAM 1

PAPER JAM 2

LSU NOT READY

DIAGNOSTIC

MODE

DOWN

SHIFT

STOP

ENTER

TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL

AND TURN THE PRINTER POWER ON.

Service Manual

4-1

TROUBLESHOOTING

4.1.2 Code

Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code

tells the function of the printer.

1) Normal Code

While printing or warming up, it indicate the position of the paper

Code

State

Description

Warm up

The printer is on, the cover is open or close.

00~05

Ready(kind of paper)

The printer is ready, the paper is detected when the first paper is printed.

00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6

20, 21, 22

Print Start

The engine controller received the print order from the video controller.

20: 1st, 21: MP, 22: SCF

Feed Sensor On

The paper is passing out of the Feed Sensor.

Feed Sensor off

The paper has passed out of the Feed Sensor.

Paper Out

The paper has passed out of Exit Sensor.

Sleep Mode

The fuser power turned off to minimize the power consumption.

2) Error Code

When detecting the malfunction, the printing is stopped to indicate error code.

Code

State

Description

60, 62, 68

Fuser Error

The error in the fuser occurred. There is a short circuit in the thermistor

and the thermostat while printing, Low Temperature Error occurs.

• 60: Open Fuser Error

• 62: Low Heat Error

• 68: Over Heat Error

Cover Open

The Printer Cover is open.

CRU Error

The Toner Cartridge not installed,

No Paper

No paper in the paper cassette.

Paper Jam 0

The front part of paper is jammed between pickup unit and Feed sensor.

Paper Jam 1

The front part of paper is jammed between the Discharge sensor and

Feed sensor.

Paper Jam 2

The front part of paper is jammed just after passing through the discharge

sensor.

Out Bin Full

The Out bin is filled with paper.

LSU Not Ready

LSU Scanner Motor not ready or Hsync signal not output.

Service Manual

4-2

TROUBLESHOOTING

4.1.3 Self Diagnostic Mode

If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.

The printer works only in the self-test mode to solve the malfunction problem.

To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same

time.

Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button

[Up] or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of

[shift] and [Enter] together.

Code

Description

Main Motor Operating System

Only the main motor is in operation.

Main High Voltage On(THV-)

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

Transfer High Voltage(-)On(THV-)

-1000 voltage output by MHV terminal.

Caution : High voltage probe should be used.

Transfer High Voltage (+)Reference on (THV +)

+800 voltage output by MHV terminal.

Caution : High voltage probe should be used.

DEV/supply High Voltage : DEV/Supply High Voltage Test.

The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply

high voltage output by each HV terminal(-500V). Press the [Up] button to switch the volt-

age. The middle and right one of the three LEDs are on and -650 voltage output by DEV

HV terminal.

Caution : High voltage probe should be used.

LSU Operating System

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press

the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is

normal, all LEDs are on.

Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift]

and [Enter] together.

Service Manual

4-3

TROUBLESHOOTING

Code

Description

Paper Empty Sensor Test :

If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are

on.

Paper Empty Sensor ON/OFF

1st LED ON/OFF

Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as '07'.

Feed Sensor ON/OFF

2nd LED ON/OFF

Exit Sensor ON/OFF

3rd LED ON/OFF

Cover Open Sensor Test

Test the Cover Open Sensor in th same way as code '07’

Cover Open Sensor ON/OFF

1st LED ON/OFF

Fuser Test

If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to

READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the

fuser is up to Printing Mode.

If you press the button once more, the left LED is on and temperature of the fuser is up

to overheat Mode.

Hot Burn Test

If the [enter] button pressed, the printer is continuously printing without detection.

Turn the power off to stop operation.

Cleaning Mode Print Mode

Print the paper to clean the OPC Drum in the Cartridge.

THV(+) TRIGGER. ALL HV :

All high voltage output by each HV terminal and LSU and the fan is in operation. In this

mode, electronic resistance of transfer roller and high voltage is detected.

PTL Test :

Indicates the function of the PTL, same method of the code ‘07’.

Fan Test :

Indicates the function of the Fan, same method of the code ‘07’.

Manual Pickup Test :

Indicates the function of th Manual Pickup, same method of the code ‘07’.

Manual Sensor Test :

Indicates the function of the Manual Sensor, same method of the code ‘07’.

Service Manual

4-4

TROUBLESHOOTING

No.

Function

Enter

Up / Do w n

Stop

Remark

Motor

Motor Run

Mo tor S top

Mhv On

Mhv Off

-1550V

MHV

THV(-)

Thv Negative On

Thv Negative Off

THV(+)

Thv On

Thv Off

+1300V

Su pp ly

DEV

Dev On

De v Of f

DEV

0:-630V

0:-430V

LSU Ru n

LSU Stop

LSU

Off

Ready

Pic kUp

Pickup On

Pickup Of f

PEmpty

Pa pe r Empt y

Se n so r

Ex it

Fee d

Cover

Cover Open

Fuser On

Fuser Off

Fus er

HotBur n

Ho tB ur n O n

Clean Print

Cl e an Pr i nti n g

Thv

Refer ence

low

adequate

high

PTL On

PTL Off

PTL

FAN

Fan On

Fan Off

Ma n u al

Pic kUp

Manual Pickup On

Manual Pickup O ff

Ma n u al

Se n so r

Manual Sensor

4.1.4 Self Test Button

If the Self-Test button pressed, vertical lines are printed.

Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After

warming-up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection,

the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the

engine malfunction is detected in the control board.

Service Manual

4-5

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