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R-771 OE
Sharp R-771 OE User Manual
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240V
50Hz
NOTE: CONDITION
1. DOOR CLOSED
MONITOR
SWITCH
I
TIMER
5
UPPER
LATCH
SWITCH
MAGNETRON
I
THERM0
CUT-OUT
I
I
Y
COOK
TURNTABLE
ty
SWITCH
;
MOTOR
I
I
I-
--
I
II
w
:
0
--
J
VARI-MOTOR
----_
1
I
TIMER
I
I
I
I
I
L
VARI-
I
SWITCH
I
L---------------
-
-_-----
I
POWER TRANSFORMER
-I
-----
-
. -
-
II
D,:
SHORT
--
-
--
-
MAGNETRON
PROTECTOR
Figure 2. Oven Schematic
-
Idle Condition
7
7
9
Table of Contents
Foreword
2
Caution, Microwave Radiation
2
Table of Contents
3
Test Procedures
3
Power Transformer Test
3
Short Protector Test
3
Magnetron Therm0 Cut-Out Test
3
Chapter I Product Description
5
Explanation of Microwave Cooking
5
Specifications
5
Chapter II Operation
6
Normal Cooking Sequence
6
Description of Operating Sequence
6
Offcondition
6
Idlecondition
6
Cookingcondition
6
High Condition
6
Med. LOW (Defrost) Med., Med. High and Low Condition
6
Description and Function of Components
10
Variable Cooking Control
10
Timer
10
Door Open Mechanism
11
Upper and Lower Latch Switches
11
Monitor Switch
11
Chapter III Servicing
12
Troubleshooting Guide
12
Off Condition
12
Idlecondition
12
Cookingcondition
12
Test Procedures
14
Magnetron Assembly Test
14
Power Transformer Test
15
Rectifiertest
15
High Voltage Capacitor Test
15
Short Protector Test
15
Fan Motor Test
16
Timertest
16
Magnetron Therm0 Cut-Out Test
16
Test Procedures
16
Upper Latch Switch Test
16
Lower Latch Switch Test
16
Vari-Switch Test
16
Vari-Motor Test
16
Monitor Switch Test
17
Chapter IV Component Replacement and Adjustment Procedures
17
Warning
17
Outercaseremoval
17
High Voltage'components Removal
18
Power Transformer Removal
18
Ovenlampremoval
18
Turntable Motor Removal
19
Turntable Roller Removal
19
Fan Motor Removal
19
Magnetron Assembly Removal
19
Upper Latch Switch and Monitor Switch Removal
20
Lower Latch Switch Removal
20
Control Panel Assembly and Components Removal
21
Vari-Motor Assembly
21
Timer
21
Cookswitch
21
Cook Lamp
21
Upper Latch Switch, Lower Latch Switch and Monitor Switch Adjustment
22
Door Replacement and Adjustment
23
Microwave Measurement
24
Requirment
24
Preparation for the Testing
24
Schematic Diagram
25
Pictorial Diagram
26
Parts List
27
4
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Sharp R-771 OE Specifications
General
Brand
Sharp
Model
R-771 OE
Category
Microwave Oven
Language
English
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