10
First issue 06 /02
Power LED
unlit
No
No
Yes
Yes
No
Yes
No
Yes
No
Yes
Is the power plug correctly
connected to the wall outlet?
Rearrange the power plug
connection correctly.
Is there AC 100V behind
the fuses F1 and F2?
Fuses F1 and F2 have blown
out. Replace the fuses. If they
blow out again, the POWER
unit is out of order
Is there M+7V output at
Pin 1 of the PM connector?
Is there +5V output at Pin 2
of IC9504 (MAIN module)?
Failure in the PWR module
Is there an output of +5V
at Pin 5 of the LD connector,
Pin 4 of the PW connector
and pin 5 of the RS
connector?
Failure in +5V line. Check the LED,
PWR and RS232C modules
Failure in the
MAIN module
Try to disconnect the PW, PQ,
and RS connectors from one
after another. If the output of
M+7V is available, the circuits
beyond these connectors are
out of order. If no output is
found, the POWER or the
MAIN unit is out of order.
The power LED
is flashing red
No
Yes
Is 0V observed at Pin 10
of IC9806 (MAIN module)?
Failure in the
POWER unit
No
Yes
Is 5V observed at Pin 3 of
PN connector (MAIN module)?
Failure in the
POWER unit
Failure in the
MAIN module
Содержание 50WS94E
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