Sharp R-216LS ユーザーズマニュアル

R216LS

7 – 1

R216LS

Service Manual

 

When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of
trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section. 

:

If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, primary interlock relay (RY2), door sensing switch and
secondary interlock switch before replacing the monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-
BA026WRKZ or FFS-BA038WRKZ as an assembly.

:

Whenever troubleshooting is performed with the power supply cord
disconnected. It may in, some cases, be necessary to connect the
power supply cord after the outer case has been removed, in this
event,

1) Disconnect the power supply cord, and then remove outer case.

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Disconnect the leads to the primary of the power transformer.

5) Ensure that the leads remain isolated from other components and

oven chassis by using insulation tape.

6) After that procedure, reconnect the power supply cord.

When the testing is completed,

1) Disconnect the power supply cord, and then remove outer case.

2) Open the door and block it open.

3) Discharge high voltage capacitor.

4) Reconnect the leads to the primary of the power transformer.

5) Reinstall the outer case (cabinet).

6) Reconnect the power supply cord after the outer case is installed.

7) Run the oven and check all functions.

RE CK A

B

C

D

E

F

F

G

H RE RE CK J/L CK CK CK K

N

M

I

POSSIBLE CASE

AND DEFECTIVE PARTS

SHORT

IN

POWER

CORD

SHORT

O

R

O

PENED

WIRING

MAGNETRON

POWER

TRANSFORMER

H.V.

RECTIFIER

ASSEMBLY

HIGH

VOLTAGE

CAPACITOR

TEMPERATURE

F

USE

(OVEN)

or

THERMAL

CUT-OUT

(OVEN)

PRIMARY

INTERLOCK

SYSTEM

SECONDARY

INTERLOCK

SWIT

MONITOR

SWITCH

MONITOR

FUSE

OVEN

LAMP

COOLING

FAN

MOTOR

TURNTABLE

MOTOR

CONTROL

UNIT

o

r

RELAY

WRONG

OPERATION

LOW

VOLTAGE

DIRTY

OVEN

CAVITY

KEY

U

NIT

(MEMBRAINE

SWITCH

FOIL

PATTERN

ON

PWB.

DEFROST

NOISE

FILTER

CONDITION

PROBLEM

OFF

CONDITION

TTEST PROCEDURE

COOKING

CONDITION

Home fuse blows when power cord is plugged
into wall receptacle.

Monitor fuse blows when power cord is plugged
into wall receptacle.

Any letters or indicators do not appear in display
when power cord is first plugged into wall outlet.

D i s p l a y d o e s n o t o p e r a t e p r o p e r l y w h e n
STOP/CLEAR key is touched. (Buzzer should
sound and time of day should appear in display.)

Monitor fuse blows when the door is opened.

Fan motor does not operate. (All other electric
components function.)

Oven lamp does not light at all. (All other electric
components function.)

Turntable motor does not operate. (All other
electric components function.)

Oven does not go into cook cycle when START
pad is touched

Oven seems to be operating but little or no heat
is produced in oven load. (Food incompletely
cooked or not cooked at all at end of cook cycle.)

Oven goes into a cook cycle but extremely
uneven heating is produced in oven load (food).

Oven does not cook properly when programmed
for Cooking 50% mode. (Operates properly on
Cooking Power 100% mode.)

Oven lamp, turntable motor and fan motor do not
operate.

O v e n g o e s i n t o D E F R O S T b u t f o o d i s n o t
defrosted well.