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4-1
TROUBLESHOOTING
Service Manual
4
4
4. 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
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.