Does not operate at all (Operation Lamp and Timer Lamp do not light up)
[Check Point]
[Notes in service]
(1) Is the input power voltage from the exclusive circuit AC outlet normal?
This model is non-insulated PCB that doesn't take the insulated structure on the PCB from this fiscal year.
Be careful that it is likely to get a hock when it touches the charge part when checking.
Moreover, there is a possibility of getting a shock even if it touches the secondary circuit of
the display PCB or the stepping motor, etc.
(2) Is the AC plug inserted to the AC outlet securely and not loose?
(4) Check if each connector is inserted securely.
[Checking Flow Chart]
YES (AC220/230V)
YES (AC220/230V)
YES (AC260~400V)
(IC5, T1 or IC8,11 defective)
YES (DC5Vp-p, Pulse wave of 50Hz or 60Hz)
Controller PCB defective
NO
NO
NO
NO
NO
(IC8, T1 or IC6 defective)
07-01
Does not connected cable do wrong wiring?(3)
(C9 :DC 5V 0.25V)
YES (C10:DC15V 1.5V)
Is AC input voltage from AC outlet normal ?
Fault of an input power supply.
Is AC voltage between VA 1 normal?
F1, VA1 defective
Is DC voltage between terminal of C4 normal?
L1, L5, D5 defective
Switching power circuit
Is DC voltage between terminals of C10 normal?
Is DC voltage between terminals of C9 normal?
Is DC voltage between terminals 3 & 4 of IC2 normal?
IC2 defective
YES (AC220/230V)
NO
Is AC voltage between 1pin & 2pin of CN1 normal?
Temp fuse defective
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