R-27STMA (serv.man7). Troubleshooting guide - Sharp Home Appliance Service Manual (repair manual)

r-27stma (serv.man7) service manual
Model
R-27STMA (serv.man7)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
59.41 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Troubleshooting guide
File
r-27stma-sm7.pdf
Date

Read Sharp R-27STMA (serv.man7) Service Manual online

R27STMA
7 – 1
R27STMA
Service Manual
 
CHAPTER 7. 
TROUBLESHOOTING GUIDE
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 Pro-
cedure"section.
IMPORTANT:
If the oven becomes inoperative because of a blown fuse T6.3A in the
secondary interlock switch - primary interlock relay (RY2) - monitor
switch circuit, check the secondary interlock switch, primary interlock
relay (RY2) and monitor switch before replacing the fuse T6.3A.
MAGNETRON
HIGH
VOLTAGE
T
RANSFORMER
H.V.
RECTIFIER
ASSEMBLY
HIGH
VOLTAGE
W
IRE
HIGH
VOLTAGE
C
APACITOR
SECONDARY
INTEROCK
SWITCH
DOOR
SENSINGSWITCH
MONITOR
S
WITCH
TEMPERATURE
F
USE
150
C
(OVEN)
FAN
M
OTOR
TURNTABLE
M
OTOR
FUSE
T6.3A
TOUCH
CONTROL
PANEL
RELAY
(RY-5)
RELAY
(RY-2)
RELAY
(RY-6)
FUSE
ON
P.W.B.
POWER
S
UPPLY
C
ORD
SHORTED
WIRE
H
ARNESS
OPENED
WIRE
H
ARNESS
OVEN
LAMP
WALL
OUTLET
MISADJUSTMENT
S
WITCH
HOME
FUSE
OR
BREAKER
BLOCKED
COOLING
F
AN
BLOCKED
VENTILATION
NOISE
F
ILTER
SWITCH
UNIT
OFF
CONDITION
PROBLEM
CONDITION
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
ON
CONDITION
A B C
D
E
E
E F G G H J
L
L
M
I K
L
RE CK CK RE CK CK
CK
CK CK CK
Home fuse blows when pow-
ersupply cord is plugged into
wall outlet.
FUSE T6.3A blows when
power supply cord is plug-
ged into wall outlet.
" . 0" does not appear in display
but power supply cord is plugged
into wall outlet, and the door is
opened and closed..
Display does not operate
properly when STOP button
is pressed.
Oven does not start when the
START button is touched.
(Display appears)
Oven lamp does not light
(Display appears.)
Fan motor does not operate.
(Display appears.)
Turntable motor does not
operate. (Display appears.)
Oven or any electrical parts
does not stop when cooking
time is 0 or STOP button is
pressed.
Oven seems to be operating
but little or no heat is pro-
duced in oven load. (Micro-
wave power level is set at
100%)
Oven does not seems to be
operating
properly
when
70%,50%, 30% or 10% is
set. (Oven operates properly
at 100%.)
Oven goes into cook cycle
bu tshuts down before end
of cooking cycle.

Download Sharp R-27STMA (serv.man7) Service Manual (Repair Manual)

Here you can read online and download Sharp R-27STMA (serv.man7) Service Manual in PDF. R-27STMA (serv.man7) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp R-27STMA (serv.man7) Microwave Oven. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.