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R-21LTF
Sharp R-21LTF User Manual
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R21L
TF
4
NO.
P
ARTS
CODE
PRICE
RANK
NEW
MARK
PA
R
T
RANK
DESCRIPTION
6-6
TCAUAA245WRR0
AC
Cover caution
SCREWS, NUTS AND WASHERS
7-1
XHPS740P08K00
AB
Screw : 4mm x 8mm
7-2
XEPS740P25000
AB
Screw : 4mm x 25mm
7-3
LX-CZA038WRE0
AA
Special screw
7-4
LX-CZ0052WRE0
AA
Special screw
7-5
LX-EZA042WRE0
AB
Special screw
7-6
XBPWW40P04000
AB
Screw : 4mm x 4mm
7-7
XHPS740P08000
AB
Screw : 4mm x 8mm
7-8
XHTS740P08000
AC
Screw : 4mm x 8mm
7-9
XHPS730P06000
AB
Screw : 3mm x 6mm
7-10
XHTS740P08RV0
AG
Screw : 4mm x 8mm
7-11
XOTS740P12000
AA
Screw : 4mm x 12mm
7-12
XOTS740P08000
AA
Screw : 4mm x 8mm
7-13
XOTWW40P10000
AA
Screw : 4mm x 10mm
[1] OVEN PARTS
39
41
Table of Contents
Default Chapter
1
Microwave Oven
1
Sharp Corporation
1
Table of Contents
2
Chapter 1 . Warning to Service Personnel Bly
3
Before Servicing
3
Precautions to be Observed before and During Servicing to Avoid Possible Expo
3
After Repairing
4
Before Servicing
4
Warning to Service Personnel
4
When the Testing Is Completed
4
CEDURE 1] Requirements:
5
Chapter 2. Microwave Measurement Pro
5
Leakage Test
5
Preparation for Testing
5
Requirements
5
Chapter 3. Foreword and Warning
6
Danger
6
Foreword
6
Warning
6
Chapter 4. Product Description
7
Specifications
7
Chapter 5. General Information 1] Grounding Instructions
8
Chapter 5. General Information Grounding Instructions
8
Oven Diagram
8
Chapter 6. Operation Description of Operating Se- Quence
9
Operation
9
Oven Schenatic
10
Description and Function of Components
11
Chapter 7. Troubleshooting Guide
12
Troubleshooting Chart
12
Procedure A: MAGNETRON ASSEMBLY TEST
13
Procedure B: POWER TRANSFORMER TEST
13
Procedure C: HIGH VOLTAGE RECTIFIER TEST
13
Procedure D: HIGH VOLTAGE CAPACITOR TEST
14
Procedure E: THERMAL CUT out TEST
14
Procedure F: SECONDARY INTERLOCK SWITCH TEST
14
Procedure F: PRIMARY INTERLOCK SYSTEM TEST
15
Procedure G: MONITOR SWITCH TEST
15
Procedure H: BLOWN MINITOR FUSE TEST
15
Procedure I: NOISE FILTER TEST
16
Procedure J: TOUCH CONTROL PANEL ASSEMBLY TEST
16
Procedure K: KEY UNIT TEST
17
Procedure L: RELAY TEST
18
Procedure M: FOIL PATTERN on the PRINTED WIRING BOARD TEST
18
Chapter 9. Touch Control Panel Assem
20
Outline of Touch Control Panel
20
Servicing for Touch Control Panel
20
Procedure for Checking/Clearing Service Counts of Microwave Oven
21
Other Setting and Checking Pro- Cedure
22
Chapter 10. Precautions for Using Lead-Free Solder
24
Employing Lead-Free Solder
24
Soldering
24
Using Lead-Free Wire Solder
24
Adjustment Procedure 1] Warning
25
Chapter 11. Component Replacement and Adjustment Procedure Warning
25
Outer Case Removal
25
Control Panel Assembly Removal
26
High Voltage Rectifier Assembly and High Voltage Capacitor Removal
26
Magnetron Removal
26
Power Transformer Removal
26
Antenna Motor Removal
27
Cooling Fan Motor Removal
27
Oven Lamp and Lamp Socket Removal
27
Positive Lock Connector (No-Case Type) Removal
27
Door Sensing Switch/Secondary Interlock Switch and Monitor Switch Removal
28
Power Supply Cord Replacement
28
Door Parts Removal
29
Door Sensing Switch/Secondary Interlock Switch and Monitor Switch Adjustment
29
Antenna Motor Shaft Replacement
30
Installation of Ceramic Shelf
32
Chapter 12. Circuit Diagrams
33
Pictorial Diagram (Figure S-1)
33
Control Panel Circuit (Figure S-2A and S-2B)
34
Printed Wiring Board (Figure S-3)
36
Parts List
37
4
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Sharp R-21LTF Specifications
General
Brand
Sharp
Model
R-21LTF
Category
Microwave Oven
Language
English
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