Alignment And Adjustments - Samsung ML-2250/XBG Service Manual

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6. Alignment and Adjustments

This chapter describes some of the main service procedures including:
Using the DCU for diagnostics; Clearing paper jam and test patterns.
Much of this chapter is also included in the user's guide.
6.1 How to use DCU
6.1.1 DCU Setup
You can use the DCU test jig as an aid to the diagnosis of printer problems. To connect the DCU to the
printer open the rear accessory cover (see page 5-9 step7) and then connect the DCU harness wire (10
pin/4 pin) to CN2(ML-2250) on the Main control board.
Samsung Electronics
ML SERIES DIAGNOSTIC CONTROL UNIT
STATUS
DIAGNOSTIC
DIAGNOSTIC CODE
00 MAIN MOTOR OPERATING SYSTEM
01 MAIN HIGH-VOLTAGE ON
02 TRNSFER HIGH-VOLTAGE (-)ON
03 THV(+) REFERANCE VOLTAGE
04 DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON
05 LSU OPERATING SYSTEM
06 PICKUP CLUTCH ON
07 PEEMPTY/PWITH/NEW CRU TEST
08 FEED & EXIT SENSOR TEST
09 COVER OPEN SENSOR TEST
10 FUSER TEST
11 HOT BURN TEST
CLEAN MODE PRINT
12
13 THV(+)TRIGGER, ALL HV & FAN ON
14 THV(+) REFERENCE ON
DIAGNOSTIC
MODE
TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL
AND TURN THE PRINTER POWER ON.
04 DEV 300 DEV 350
05 LSU READY LSU MT & LD
07 PAPER EMPTY PAPER WIDTH
08 EXIT SENSOR
09 COVER OPEN
10 COER HEATING PRINTING TEMP
ON OFF
NORMAL STATUS CODE
61 WARM UP
00 READY (REGAL)
READY (LETTER)
01
READY (A4)
02
03 READY (EXECUTIVE)
04 READY (B5)
PRINT START
20
FEED SENSOR ON
30
FEED SENSOR OFF
40
50 PAPER OUT
SLEEP MODE
69
ERROR STATUS CODE
OPEN FUSER ERROR
60
LOW TEMPERATURE ERROR
62
OVER HEATING ERROR
68
COVER OPEN ERROR
64
NO PAPERR
70
PAPER JAM 0
71
PAPER JAM 1
72
PAPER JAM 2
73
95 LSU NOT READY
DOWN SHIFT
UP
SEC CODE : ML+5000 KC/XRX
Alignment & Adjustments
DEV 350
LSU MOTOR
NEW CRU
SELF
FEED SENSOR
TEST
READY HEAT
STOP
ENTER
Service Manual
6-1