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Samsung
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ML-1700 series
Wiring Diagram
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Samsung ML-1510, ML-1700 series Alignment and Adjustments

6
6
6-1
Samsung Electronics
ALIGNMENT & ADJUSTMENTS
Service
Manual
6. Alignment and Adjustments
6.1 How to use DCU
6.1.1 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 CN3(ML-1750) or CN2(ML-1710/1510) of the Main control board.
ML SERIES DIAGNOSTIC CONTROL UNIT
04
05
07
08
09
10
DEV 300
LSU READY
PAPER EMPTY
COVER OPEN
COER HEATING
DEV 350
LSU MT & LD
PAPER WIDTH
EXIT SENSOR
PRINTING TEMP
DEV 350
LSU MOTOR
NEW CRU
FEED SENSOR
READY HEAT
ON
OFF
STATUS
SELF
TEST
DIAGNOSTIC
DIAGNOSTIC CODE
00 01 02 03 04 05 06 07 08 09 10 11
12
13
14
61
00 01 02 03 04
20 30 40 50
69
60 62 68 64 70 71 72 73 95
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
ERROR STATUS CODE
STATUS CODE
WARM UP
READY (REGAL) READY (LETTER) READY (A4) READY (EXECUTIVE) READY (B5)
PRINT START FEED SENSOR ON FEED SENSOR OFF PAPER OUT
SLEEP MODE
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
UP ENTER
SHIFT STOP
TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL
AND TURN THE PRINTER POWER ON.
6-2
ALIGNMENT & ADJUSTMENTS
Samsung Electronics
Service
Manual
6.1.2 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
2) Error Code
When detecting the malfunction, the printing is stopped to indicate error code.
Code State Description
61 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 30 Feed Sensor On The paper is passing out of the Feed Sensor. 40 Feed Sensor off The paper has passed out of the Feed Sensor. 50 Paper Out The paper has passed out of Exit Sensor. 69 Sleep Mode The fuser power turned off to minimize the power consumption.
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 64 Cover Open The Printer Cover is open. 65 CRU Error The Toner Cartridge not installed, 70 No Paper No paper in the paper cassette. 71 Paper Jam 0 The front part of paper is jammed between pickup unit and Feed sensor. 72 Paper Jam 1 The front part of paper is jammed between the Discharge sensor and
Feed sensor.
73 Paper Jam 2 The front part of paper is jammed just after passing through the discharge
sensor. 76 Out Bin Full The Out bin is filled with paper. 95 LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.
6-3
Samsung Electronics
ALIGNMENT & ADJUSTMENTS
Service
Manual
6.1.3 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
00 Main Motor Operating System
Only the main motor is in operation.
01 Main High Voltage On(THV-)
-1400 voltage output by MHV terminal.
Caution : High voltage probe should be used.
02 Transfer High Voltage(-)On(THV-)
-1000 voltage output by MHV terminal. Caution : High voltage probe should be used.
03 Transfer High Voltage (+)Reference on (THV +)
+800 voltage output by MHV terminal.
Caution : High voltage probe should be used.
04 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 volt­age. 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.
05 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.
06 Pickup clutch on
The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and [Enter] together.
6-4
ALIGNMENT & ADJUSTMENTS
Samsung Electronics
Service
Manual
Code Description
07 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
08 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
09 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
10 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.
11 Hot Burn Test
If the [enter] button pressed, the printer is continuously printing without detection. Turn the power off to stop operation.
12 Cleaning Mode Print Mode
Print the paper to clean the OPC Drum in the Cartridge.
13 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.
14 PTL Test :
Indicates the function of the PTL, same method of the code ‘07’.
15 Fan Test :
Indicates the function of the Fan, same method of the code ‘07’.
16 Manual Pickup Test :
Indicates the function of th Manual Pickup, same method of the code ‘07’.
17 Manual Sensor Test :
Indicates the function of the Manual Sensor, same method of the code ‘07’.
6-5
Samsung Electronics
ALIGNMENT & ADJUSTMENTS
Service
Manual
6.1.4 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.
No. Function Enter Up/ Dow n Stop Remark
00
Motor
Motor Run Mo tor S top
01
MHV
Mhv On Mhv Off -1550V
02
THV(-)
Thv Negative On Thv Negative Off
03
THV(+)
Thv On Thv Off +1300V
04
DEV
Dev On
Supp l y DEV
De v O f f
0:-630V 0:-430V
05
LSU
LSU R u n
On Off Ready
LSU Stop
06
Pic kUp
Picku p On Pickup Off
07
PEmpty
Pape r Empt y
08
Sen so r
Ex it Feed
09
Cover
Cover Open
10
Fus er
Fuser On Fuser Off
11
Hot Burn
Ho tB u rn O n
12
Clean Print
Cl e an Pr i nti n g
13
Thv
Refer ence
low adequate high
14
PTL
PTL On PTL Off
15
FAN
Fan On Fan Off
16
Ma nu al
Pic kUp
Manual Pickup On Manual Pickup O ff
17
Ma nu al
Sen so r
Manual Sensor
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