4.8 Machine malfunction
No. Symptom What to confirm Countermeasure
1
TheLCDshows
nothing.
1.Isthemachineinenergysavemode? Yes
No
Presstheenergysavekey,andrelease
the mode.
Check No.2.
2.Isthepowercablepluggedcorrectly? Yes
No
Check No.3.
Plug the cable correctly.
3.IsthepowerswitchOn? Yes
No
Check No.4.
Poweron.
4. DoestheDCoutputvoltagesfrom
thepowersupplyunittoconnector
P3 on the main control boarhavethe
followingoutput?
Pin 7, 9 +3.3 V
Pin 15, 17 +5.0 V
Pin 2, 4, 6 +12.0V
Pin 12, 14 +24.0V
Pin 1, 3, 5,
8, 10, 11, 13,
19, 21, 23
GND
Yes
No
Check No.5.
Replacethepowersupply.
5. Isthefollowingconnection OK?
•LCD assembly to the Panel PCB. (P8)
•Panel PCB (P1:) to the harness to the
main control board. (P5A)
Yes
No
Check No.6.
Reconnect the connection or replace
the harness.
6. If you replace the panel board, the
symptomwillbexed.
Yes
No
Replace the panel board.
Check No.7.
7. If you replace the main board, the
symptomwillbexed.
Yes
No
Replace the main control board.
Replace the machine.
2
TheLCDshows
“Please close
the flashing
cover.”
1.Ifyouclosetheashingcover,the
symptomwillbexed.
Yes
No
Solved.
Check No.2.
2.Isthecoversecuredrmlyby
screws?
Yes
No
Check No.3.
Securethecoverproperly.
3.Isthemessageshownafterenergy
savemodeisreleased?
Yes
No
Check No.4.
Check No.5.
4.DoestheLPHboardP93-8have
+24V output?
Yes
No
Check No.5.
Check No.6.
5. Press the sensor in the message and
check the output changes to +3V
through GND. (The interlock +24V
through GND.)
No Replace the sensor or the harness.
Interlock : LPH board P93-11 Yes Check No.6.
JAMC1 : LPH board P93-3 Yes Check No.6.
JAMC2: Main control board P17-7 Yes Check No.7.
ADFcover:MaincontrolboardP82-1 Yes Check No.7.
6. If you replace LPH board or the con-
nectingharness,themessagewill
disappear.
Yes
No
Replace the circuit board or the har-
ness.
Check No.7.
7. If you replace the main control board,
thesymptomwillbexed.
Yes
No
Replace the main control board.
Replace the machine.
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