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TROUBLE
SHOOTING
GUIDE
(Continued)
2.
SYNCHRO
switch cannot be turned on.
Is pulse-shape voltage inputted to | No
Pin 3 of 1CO2
(LC4013
in the
Graphic
P.C.Board
of
the
Amplifier?
ts SO5 turned on?
Is +B joined?
e Defective switch
e Defective power supply
Check the circuit.
(Solder tunnel,
broken
pattern)
When power is applied;
Yes
e Pulse-shape
voltage
is
not
applied. (Check CO5 and ROS.)
@ Check R24.
Is pulse-shape voltage inputted to | No
Pin 6 of IC LC4013?
Yes
e@ Check +B.
Is pin 1 of IC LC4013 | No
e@ Check C27 and R26.
set in ""H" level?
Yes
IC LC4013
is defective.
Are only display lamps
(LED) extinguished?
SYNCHRO
REC
func-
tion works.
ls QO3
in the Graphic
|No
P.C.Board turned on?
Yes
Q03 is defective.
DO5 and DO4 are opened.
(Solder tunnel)
Wiring is defective. (Solder
tunnel, broken pattern)
|
— ol
|
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