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Microwave Oven
R-239
Sharp R-239 Service Manual
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R239(W)
1 – 2
[3] CAUTION MICROW
A
VE RADIA
TION
Personnel
should
not
be
exposed
to
the
microwave
energy
which
may
radiate
from
the
magnetron
or
other
microwave
generating
devices
if
it
is
improperly
used
or
connected.
All
input
and
output
microwave
connections,
waveguides,
flanges
and
gaskets
must
be
secured.
Never
operate
the
device
without
a
microwave
energy
absorbing
load
attached.
Never
look
into
an
o
pen
waveguide
or
antenna
while
the
device
is
energized.
3
5
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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