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NE-972
COMPONENT TEST PROCEDURE
CAUTION
tinuity.
(B) Normal (cold) resistance readings should be as follows:
Secondary winding
Approx. 80Q ~ 1200
Filament winding -vrtrtsrrr
Approx.
0Q
Primary winding (OV ~ 240V) vss
Approx.
0Q ~
3Q
2. High voltage capacitor
(C) A shorted capacitor will show continuous continuity.
(D} An open capacitor will show constant 9MQ.
((Due to internal 9MQ resistor)
(E) Resistance between each terminal and chassis should be infinite.
3. Diode assembly with 500 mA fuse (Fig. 19)
(A) Isolate the diode assembly from the circuit by disconnecting the
leads.
fuse.
4. Magnetron (Fig. 20)
tre Ty \
\UTO
WEIGH
COMBINATION
@cLock
DEFROST | POWER
@
'I =)
'|
'
,
STOP/
Ib
cancer
| DUAL | ka¢boz
Fig. 21B
PRIMARY
TERMINALS
FILAMENT
TERMINALS
500 mA
FUSE
SECONDARY SS\
TERMINALS
HIGH VOLTAGE TRANSFORMER
Fig. 19
LAMENT
RMINALS
MAGNETRON
Fig. 20
NE-992/NE-993
®
START
Tia
e
DEFROS
stop/\
@ CANCEL?
LESS
10 MIN®
1 MIN
®10 SEC®
1 SEC
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