4 
TROUBLESHOOTING
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
STATUS
DIAGNOSTIC
04 | DEV 300 | DEV 350 | DEV 350 |
05 | LSU READY | LSU MT & LD | LSU MOTOR |
07 | PAPER EMPTY | PAPER WIDTH | NEW CRU |
08 |
| EXIT SENSOR | FEED SENSOR |
09 | COVER OPEN |
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10 | COER HEATING | PRINTING TEMP | READY HEAT |
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| ON | OFF |
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SELF TEST
DIAGNOSTIC CODE
00MAIN MOTOR OPERATING SYSTEM
01MAIN
02TRNSFER
03THV(+) REFERANCE VOLTAGE
04DEV/SUPPLY
05LSU OPERATING SYSTEM
06PICKUP CLUTCH ON
07 | PEEMPTY/PWITH/NEW CRU TEST |
08 | FEED & EXIT SENSOR TEST |
09COVER OPEN SENSOR TEST
10FUSER TEST
11HOT BURN TEST
12CLEAN MODE PRINT
13THV(+)TRIGGER, ALL HV & FAN ON
14THV(+) REFERENCE ON
STATUS CODE
61 WARM UP
00READY (REGAL)
01READY (LETTER)
02READY (A4)
03READY (EXECUTIVE)
04READY (B5)
20 PRINT START
30FEED SENSOR ON 40 FEED SENSOR OFF
50PAPER OUT
69 SLEEP MODE
ERROR STATUS CODE
60 OPEN FUSER ERROR
62 LOW TEMPERATURE ERROR 68 OVER HEATING ERROR 64 COVER OPEN ERROR
70 NO PAPERR
71 PAPER JAM 0
72 PAPER JAM 1
73 PAPER JAM 2
95 LSU NOT READY
DIAGNOSTIC |
| DOWN |
| SHIFT |
| STOP |
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MODE |
| UP |
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| ENTER |
TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL AND TURN THE PRINTER POWER ON.
Service Manual