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Microwave Oven
R-239
Sharp R-239 Service Manual
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R239(W)
14 – 2
[2] Pictorial Diagram (Figure S-1)
Figure S-1. Pictorial Diagram
BLU
SW2:
MONITOR
SWITCH
SW1:
1ST.
LATCH
SWITCH
COM
COM
RED
N.C.
N.O.
N.O.
COM
GRY
GRN
GRN
GRY
TF:
TEMPERATURE
FUSE
(OVEN)
SW3:
2ND.
INTERLOCK
RELAY
CONTROL
SWITCH
BLK
ORG
GRN
CONTROL
PANEL
GRY
CN-B
CN-H
2
1
N.O.
T1
RY1
N.O.
RY2
GRY
GRY
RED
BLK
WHT
CN-B
2
1
GRN
GRY
COM
N.O.
GRY
C:
HIGH
VOLTAGE
CAPACITOR
F2:
HIGH
VOLTAGE
FUSE
H.V.
RECTIFIER
HIGH
VOLTAGE
COMPONENTS
MG:
MAGNETRON
TTM:
TURNTABLE
MOTOR
T:
HIGH
VOLTAGE
TRANSFORMER
RED
RED
GRY
RED
WHT
WHT
ORG
F1:
FUSE
LIVE
NEUTRAL
FM:
FAN
MOTOR
BLU
GRY
RED
OL:
OVEN
LAMP
RED
BRN
BLU
L
N
WHT
RED
Power
Supply
Cord
Oven
Cavity
Back
Plate
Screw
Noise
Filter
G
/
Y
R
E
D
GRY
WHT
ORG
O
R
G
29
31
Table of Contents
default chapter
2
Table of Contents
2
Chapter 1. Before Servicing
3
General Important Information
3
Warning
3
Caution Microwave Radiation
4
Chapter 2. Warning to Service Personnel
5
Chapter 3. Product Specifications
8
Chapter 4. Appearance View
9
Oven
9
Touch Control Panel
9
Chapter 5. Operation Sequence off Condition
10
Microwave Cooking Condition
10
Power Output Reduction
10
Chapter 6. Function of Important Compo
11
Door Open Mechanism
11
1St. Latch Switch (Sw1) and 2Nd
11
Interlock Relay Control Switch (Sw3)
11
Monitor Switch (Sw2)
11
Fuse (F1) T6.3A
11
High Voltage Fuse (F2)
11
Temperature Fuse (Tf) 150C (Oven)
11
Turntable Motor (Ttm)
11
Fan Motor (Fm)
11
Chapter 7. Troubleshooting Guide Foreword
12
Chart
12
Chapter 8. Test Procedures
13
Procedure a : MAGNETRON (MG) TEST
13
Procedure B: HIGH VOLTAGE TRANSFORMER (T) TEST
14
Procedure C: HIGH VOLTAGE RECTIFIER TEST
14
Procedure D: HIGH VOLTAGE CAPACITOR (C) TEST
14
Procedure E: SWITCH (SW, SW2, SW3) TEST
15
Procedure F: TEMPERATURE FUSE (TF) TEST
15
Procedure G: MOTOR WINDING TEST
15
Procedure H: FUSE (F1) T6.3A
15
Procedure I: NOISE FILTER TEST
15
Procedure J: HIGH VOLTAGE FUSE (F2) TEST
16
Procedure K: TOUCH CONTROL PANEL ASSEMBLY TEST
16
Procedure L: SWITCH UNIT TEST
16
Procedure M: RELAY RY1, RY2) TEST
17
Procedure N: PROCEDURES to be TAKEN WHEN the FOIL PATTERN on the PRINTED WIRING BOARD (PWB) IS OPEN
17
Chapter 9. Touch Control Panel Assem
18
Outline of Touch Control Panel
18
Description of Lsi
18
Servicing for Touch Control Panel
20
Chapter 10. Precautions for Using Lead- Free Solder
21
Chapter 11. Component Replacement and Adjustment Procedure before Operating
22
Outer Case Removal
22
High Voltage Transformer Removal
22
Capacitor Removal
23
Magnetron Removal
23
Positive Lock Connector (No-Case Type) Removal
23
Turntable Motor Removal
23
Cooling Fan Motor Removal
24
Power Supply Cord Replacement
24
Control Panel Assembly Removal
25
1St. Latch Switch, 2Nd. Interlock Relay Control Switch and Monitor Switch Adjustment
25
1St. Latch Switch, 2Nd. Interlock
25
Door Replacement
26
Chapter 12. Microwave Measurement
27
Chapter 13. Test Data at a Glance
28
CHAPTER 14. CIRCUIT DIAGRAMS Oven Schematic
29
Pictorial Diagram (Figure S-1)
30
Control Unit Circuit (Figure S-2)
31
Printed Wiring Board
32
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Sharp R-239 Specifications
General
Brand
Sharp
Model
R-239
Category
Microwave Oven
Language
English
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