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Microwave Oven
R-969IN
Sharp R-969IN User Manual
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R969(W)
14 – 9
[6] Key Unit Circuit
Figure S-5. Key Unit C
ircuit
IC1-6(P73)
IC1-7(P72)
IC1-8(P71)
IC1-9(P70)
VC
GND
IC1-77(AN4)
IC1-39(P17)
R67
15k
R66
15k
R75
100k
R68
15k
:
IF
NOT
SPECIFIED
0.01
F/25V
:
IF
NOT
SPECIFIED
1/10W
5%
R69
15k
R70
15k
R71
15k
R74
100k
R73
100k
R72
100k
C63
330pF/50v
C62
330pF/50v
C61
330pF/50v
C60
330pF/50v
R65
15k
R64
15k
R63
15k
R62
15k
R61
15k
R60
15k
IC1-40(P16)
IC1-41(P15)
IC1-42(P14)
IC1-43(P13)
IC1-44(P12)
IC1-45(P11)
IC1-46(P10)
IC1-22(INT1)
IC1-18(P47)
G12
G11
G10
G9
G8
G7
SENSOR
COOK
G6
G5
G4
G3
G2
G1
EXPRESS
DEFROST
EXPRESS
COOK
46
48
Table of Contents
default chapter
2
Table of Contents
2
Chapter 1. Before Servicing
4
Tion
4
Warning
4
Caution Microwave Radiation
5
Chapter 2. Warning to Service Personnel
6
Chapter 3. Product Specifications
9
Chapter 4. Appearance View Oven
10
Touch Control Panel
10
Chapter 5. Operation Sequence off Condition
11
Microwave Cooking Condition
11
Grill Cooking Condition
12
Convection Cooking Condition
12
Dual Cooking Condition
12
On/Off Time Ratio
12
Automatic Cooking
13
Power Output Reduction
13
Fan Motor Operation
13
Convection Motor Operation
13
Absolutehumiditysensor (Ah Sensor)Cooking Condition
13
Ah Sensor Cooking Sequence
13
Chapter 6. Function of Important Com
14
Door Open Mechanism
14
Monitored Latch Switch (Sw1)
14
Stop Switch (Sw2)
14
Monitor Switch (Sw3)
14
Fuse (F1) 20A 250V
14
Fuse (F2) F8A 250V (Noise Filter)
14
Tc Transformer
14
Thermal Cut-Out (Tc1) 125C (Mg)
14
Thermal Cut-Out (Tc2) 170C (Grill)
14
Noise Filter
15
Turntable Motor (Ttm)
15
Fan Motor (Fm)
15
Convection Motor (CM)
15
Grill Heating Element (Gh)
15
Convection Heating Element (Ch)
15
Convection Cooking System
15
Fire Sensing Feature
15
Open Judge by Thermistor
15
Damper Open-Close Mechanism
16
Chapter 7. Troubleshooting Guide Foreword
17
Chart
18
Chapter 8. Test Procedures
19
Procedure A: MAGNETRON TEST
19
Procedure B: HIGH VOLTAGE TRANSFORMER TEST
20
Procedure C: HIGH VOLTAGE RECTIFIER TEST
20
Procedure D: HIGH VOLTAGE CAPACITOR TEST
20
Procedure E: SWITCH TEST
21
Procedure F: THERMISTOR TEST
21
Procedure G: THERMAL CUT-OUT TEST
21
Procedure H: MOTOR WINDING TEST
21
Procedure I: NOISE FILTER TEST
22
Procedure J: BLOWN FUSE (F1) 20A
22
Procedure K: BLOWN FUSE (F2) 8A (NOISE FILTER)
22
Procedure L: GRILL HEATING ELE- MENTS (TOP) and CONVECTION HEATING ELEMENT TEST
22
Procedure M: CONTROL PANEL ASSEMBLY TEST
22
Procedure N: KEY UNIT TEST
23
Procedure O: RELAY TEST
23
Procedure P: PROCEDURES to be TAKEN WHEN the FOIL PATTERN on the PRINTED WIRING BOARD (PWB) IS OPEN
24
Procedure Q: AH SENSOR TEST
24
Chapter 9. Touch Control Panel Assem
26
Outline of Touch Control Pan
26
Absolute Humidity Sensor Circuit
26
Servicing for Touch Control Panel
27
Chapter 10. Precautions for Using Lead
29
Chapter 11. Component Replacement and Adjustment Procedure before Operating
30
Outer Case Removal
30
High Voltage Components Removal
30
High Voltage Transformer Removal
31
Magnetron Removal
31
Control Panel Assembly Removal
31
Graphic Sheet and Membrane Switch Replacement
31
Fan Motor Rereplacement
32
Turntable Motor Replacement
32
Convection Motor and Convection Heating Element Removal
33
Positive Lock Connector Removal
33
Oven Lamp Socket Removal
34
Power Supply Cord Replacement
34
Grill Heating Elements Removal
34
Monitored Latch Switch, Monitor Switch and Stop Switch Removal
35
Monitored Latch Switch, Stop Switch and Monitor Switch Adjustment
35
Door Replacement
35
Chapter 12. Microwave Measurement
37
Chapter 13. Test Data at a Glance
38
Chapter 14. Circuit Diagrams
39
Oven Schematic
39
Pictorial Diagram (Figure S-1)
43
Power Unit Circuit
44
Control Unit Circuit
45
Indicator Circuit
46
Key Unit Circuit
47
Printed Wiring Board
48
Parts List
49
4
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Sharp R-969IN Specifications
General
Brand
Sharp
Model
R-969IN
Category
Microwave Oven
Language
English
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