Fujitsu AO*12LFBC, Service Instructions Manual

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Does not operate at all (Operation Lamp and Timer Lamp do not light up)
[Check Point]
(1) Is the input power voltage from the exclusive circuit AC outlet normal?
(2) Is the AC plug inserted to the AC outlet securely and not loose?
(3) Check if each connector is inserted securely.
[Checking Flow Chart]
Is AC input voltage from AC outlet normal ?
Is AC voltage between VA 1 normal?
Is DC voltage between terminal of C5 normal?
Is DC voltage between terminals of C7 and C12
Is DC voltage between terminal 1 & 2 of IC6 normal?
YES (AC220/230V)
YES (AC220/230V)
YES (AC220/230V)
Is DC voltage between terminals of C9
YES (C7:DC20V)
(C12:DC13.5 1V)
YES (DC12 14V)
Terminal board temperature
fuse is blown or CN1 is loose
(IC2, T1 or IC3 defective)
IC4 defective
YES (DC15V)
Is DC voltage between terminals 3 & 4 of IC7 normal?
YES (Pulse wave of DC5Vp-p)
IC7 defective
(F1, VA1 defective)
Input power supply failure
Controller PCB defective
NO
NO
NO
NO
NO
NO
NO
Switching power circuit
Switching power circuit
Switching power circuit
(F2, D1, R1 defective)
07-01