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Trouble Cause (1) Cause (2) Checking order and adjusting procedure Page
(3) With regard to electrical components
Check whether the power comes to the power switch.
Check whether AC voltage comes between 4 and 5 pins of CN1 of
FLT p.c.b. When it does not come, check the connection of power
switch.
Check whether DC 280V comes between 1 and 3 pins of CN17 of
SDC p.c.b. When it does not come, check the connection with FLT
p.c.b. If the connection has no problem, replace FLT p.c.b.
Check that DC5V comes between 7 and 14 pins of CN31 and DC24V
between 5 and 12 pins. If they do not come, check the connection with
SDC p.c.b. If the connection has no problem, replace SDC p.c.b.
Check whether cable from operation panel is connected to CN34 of
MAIN p.c.b. If the connection has no problem, replace MAIN p.c.b.
Check whether all SW2 of PANEL p.c.b. are OFF.
Rurn ON the power and press panel key. If there is no buzzer sound,
PANEL p.c.b. is failed.
Turn ON the power and press panel key. If there is buzzer sound,
PANEL p.c.b. is normal. Failure of LCD
1-1) DC power is not supplied.
1-2) Micro computer of operation
panel fails to work.
1-3) Failure of LCD Or, breakage of
wire
1)-A AC power is not supplied.
1)-B Power is not supplied to FLT
p.c.b.
1)-C Power is not supplied to SDC
p.c.b.
1)-D Power is not supplied to MAIN
p.c.b.
1)-E Power is not supplied to
operation panel.
2)-A DIP switch setting of PANEL
p.c.b. is improper.
2)-B Failure of PANEL p.c.b.
1. Display fails to appear on the
operation panel.
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