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1. No power available
Is the POWER LED
lit normally?
YES
Flashing in green : Go to (1)
(Fan error detected)
Flashing in red
: Go to (2)
(Temperature error detected)
Reciprocally flashing in green
and red
: Go to (3)
(Cracks in the panel detected)
Lit in green
: Go to (4)
A
From A of "Flashing in green
and red" (Cracks in the panel
detected) (P. 4)
(Caution) When an LED is flashing (in the case of protector in operation), all power lines other than
the M+7 system are automatically turned off. When checking these power lines other than
the M+7 system, do it after connecting a circuit tester or the like to the measuring point,
without fail.
NO
Is the power cord plugged to
the wall outlet correctly?
YES
Is 100V AC on the output
fuses F1 and F2?
YES
Is +7V available at Pin 1 of
the PM connector (M +7V
system)?
YES
Is +5V available at Pin 2 of
IC9502 (MAIN PWB)?
YES
Is +5V available at Pin 5 of
the LD connector, Pin 4 of the
PW connector, and Pin 5 of
the RS connector?
YES
IC9501 and its peripheral
circuits are out of order.
2
NO
Make correct connections
with the wall outlet.
NO
The POWER unit is out of
order.
NO
Disconnect the PW, PQ, and
RS connectors from one
after another, and check
whether +7V is available.
If it is available, the circuit
beyond the disconnected
connector is out of order.
If it is not available even
after all the three connectors
have been disconnected,
something is wrong in the
POWER unit or the MAIN
PWB.
NO
S2601 (PWR PWB) and its
associated circuits are out
of order.
NO
A +5V line is out of order
as far as its LED PWB,
PWR PWB, and 232C PWB.
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