Advertisement
R-9380
TEST PROCEDURES
(CONT'D)
PROCEDURE
LETTER
COMPONENT
TEST
K
PROCEDURES
TO BE TAKEN
WHEN
THE
FOIL PATTERN
ON THE
PRINTED
WIRING
BOARD(PWB)
IS OPEN.
To protect
the electronic
circuits,
this model
is provided
with
a fine foil pattern
added to the
primary on the PWB, and this fine pattern service as a substitute
coil. If the foil pattern
is open,
follow
the troubleshooting
guide given below for repair.
Problem:
POWER ON, indicator
does not light up.
ISTEPS I
OCCURANCE
CAUSE OR CORRECTION
1
The rated voltage
is not applied to POWER terminal
Check supply voltage
and oven main unit.
of CPU connector
(CN-A)
2
The rated voltage.is
applied to primary side of power
Power
transformer
or secondary
circuit
defective.
transformer.
Check and repair.
3
Only pattern at "a" is broken.
'Insert jumper wire 31 and solder.
4
Pattern at "a" and "b" are broken.
*Insert
the coil
RCILF2003YAZZ
between
"c" and
"d".
NOTE:* At the time of these repairs, make visual in-
spection
of the varistor
for burning
damage
and examine the transformer
with tester for the
presence of layer short-circuit
(check primary
coil resistance).
If any abnormal condition
is detected,
replace
the defective
parts.
*; _ -"
:'
i
.:, 'I
^
x ^,
&u+$
,'i
*; _,
L.,,
I :,
rLlr
'** ,.^
,; ';'
'-1: >:;
G&,
:p;e
.'?,'.,I:,
"I ;,,
:"\
@ N _ A
VRS$
i_ ,,
,<:g;;;
3
P
,&:?;,:,g ,I ',px*&;&; 2 a=,, ,,-*;$';
.,,,
_,'
:
(RD8:
KO4U)
14
Advertisement
