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Microwave Oven
R-239
Sharp R-239 Service Manual
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R239(W)
14 – 4
[4] Printed Wiring Board
SW1
WH-A
18
R100
R101
C100
C101
SW2
SW3
SW4
SW100
CBA
LD1
LD2
LD3
LD4
DIP
CN-G
IC
SIDE
10
1
1
2
CN-B
D22
CN-H
D40
Q2
R1
C12
ZD2
(J1)
ZD3
R20
JUMP2
JUMP3
R2
BE
JUMP1
JUMP4
(JUMP
A)
SP1
C6
+
+
+
-
-
-
R3
D5
D6
C1
R21
C5
R22
T1
VRS1
P
S
D20
Q23
B
BB
E
E
E
C21
Q22
Q21
D2
D1
D3
D4
ZD1
RY1
RY2
D21
d
a
b
c
Figure
S-3.
Printed
Wiring
Board
of
Power
Unit
Figure
S-4.
Printed
Wiring
Board
of
Switchr
Unit
31
33
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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