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8. Trouble shooting
Symptom CHECK
ACTION
Fuse (FU1, FU2)
Check the fuses in the fuse box located above the AC
inlet. If they have been brown, you need to find a part
that may cause the excessive load by disconnecting
parts one by one.
Power switch (SW1)
It seems a rare case but nobody can say it never
happens. Measure the AC voltage at the backward side
of the switch when the switch is turned on. If there is no
AC voltage, the switch is malfunctioning.
Power supply (PS1) -
part for secondary
circuit
If the DC power supply goes down, no LED on the front
panel lights. It seems the situation that the power won’t
turn ON. Because Blower fan (FAN2) and Unit fan
(FAN3) get the DC power from the power supply unit
(PS1), it they stop we should suspect the power supply
is malfunctioning.
Power won’t turn ON
Front panel board
(F700)
If Front panel board is malfunctioning or the cable
between Process board (E700) is disconnected, it
seems the situation that the power won’t turn ON. Check
the connection of the cable and Front panel board by
replacing it with a good one.
Lamp(LP1, LP2)
If the message “Please replace the lamp 1 ( or lamp 2)”
appears on the monitor, replace the lamp
Interlock switch (SW2)
Confirm if the lamp house lid is closed completely. If it’s
OK, depress the switch directly. If it’s OK, you may need
to adjust the position of the switch. If it’s still NG, check
the connection between the switch and Process board
(E700). Or the switch itself may be defective.
Lamp wire (B510, 511)
Confirm if B510(White) is connected to Lamp1 and
B511(Black) is connected to Lamp2. If they are
connected the wrong way around, the lamp that is
lighting is not located in the light axis. Thus no light
comes out of the unit. It seems no light.
Power supply (PS1) -
part for Lamp
Measure the output voltage at terminal TB1 on the
power supply unit. It must be +12VDC between the
terminal 1 and 3 or 2 and 4.
Lamp does not light
Fan (FAN1, 2, 3)
If the fan is defective the lamp won’t start. Check if the
fans are working.
Iris unit (MT1)
In the case the iris does not work in both auto and
manual mode, confirm the connection of the wire of the
iris to CN7 on Process board (E700), or the iris motor
itself may be defective.
Iris does not work
Process Board (E700)
If the iris doesn’t work only in auto mode, check if the
scope wire for the image signal is firmly connected to
CN2 on Process board. If it’s OK, Process board may be
malfunctioning.
Scope
Check the image with another scope
No image is displayed
Process board (E700)
If the characters are displayed, check if the scope wire
for the image signal is firmly connected to CN2 on
Process board. In the case the characters are not
indicated either, Process board may be defective.
Lamp won’t be
switched
Motor(MOT1)
Lamp selector (SW3)
Sensor board (O700)
Process board (E700)
Check if the connections related to the parts listed in the
left column are OK referring to Wiring diagram. Check if
Lamps have been correctly held in the holder. If not the
rotation disk may be stuck.
