Home
Sharp
Microwave Oven
R-21LTF
Sharp R-21LTF User Manual
4
of 1
of 1 rating
44 pages
Give review
Manual
Specs
To Next Page
To Next Page
To Previous Page
To Previous Page
Loading...
R21L
TF
12 – 1
R21L
TF
Service Manual
CHAPTER 12.
CIRCUIT DIAGRAMS
[1] Pictorial Diagram (Figure S-1)
Figure S-
1. Pictoria
l Diagram
GRY
ORG
THERMAL
CUT-OUT
125ûC(OVEN)
OVEN
LAMP
&
SOCKET
THERMAL
CUT-OUT
145¡C(MAG.)
FAN
MOTOR
WHT
YLW
WHT
RED
WHT
HIGH
VOLTAGE
COMPONENTS
MAGNETRON
H.V.
CAPACITOR
H.V.
RECTIFIER
POWER
TRANSFORMER
GRN
POWER
SUPPLY
CORD
NOISE
FILTER
FUSE
COM
WHT
WHT
RED
WHT
WHT
N.C.
N.O.
COM.
CONNECTOR
ORG
ORG
WHT
BRN
BLU
ANTENNA
MOTOR
MONITOR
SWITCH
WHT
GRY
RED
RED
YLW
YLW
ORG
YLW
BLU
BLU
IC1
RY2
T1
RY3
CN-G
CN-A
7
1
12
CN-B
2
3
4
5
1
BLU
GRY
RY2:
PRIMARY
INTERLOCK
RELAY
CN-A
NEUTRAL
HOT
EARTH
RED
BLK
GRN
GRY
N.O.
COM.
DOOR
SENSING
SWITCH
SECONDARY
INTERLOCK
SWITCH
CONTROL
UNIT
2
1
GRN
G
R
N
G
R
N
GRY
CN-B
NOTE:
Hot
(GRY)
wire
must
be
connected
to
the
terminal
with
blue
mark
on
the
oven
light
socket.
BLUE
MARK
BRN
RED
L
N
WHT
RED
WHT
WHT
32
34
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
Based on 1 rating
Ask a question
Give review
Questions and Answers:
Need help?
Do you have a question about the Sharp R-21LTF and is the answer not in the manual?
Ask a question
Sharp R-21LTF Specifications
General
Brand
Sharp
Model
R-21LTF
Category
Microwave Oven
Language
English
Related product manuals
Sharp R-21LC
24 pages
Sharp R-21LV
24 pages
Sharp R-21LCF
40 pages
Sharp R-21LCFS
24 pages
R-21LCF - Oven Microwave 1000 W
2 pages
Sharp R-216
130 pages
Sharp R-212
28 pages
Sharp R-210A
28 pages
Sharp R-210D
10 pages
Sharp R-21AT
36 pages
Sharp R-21ATP
36 pages
Sharp R-21FBST
41 pages
To Next PageTo Next PageTo Previous PageTo Previous Page
Loading...
Need help?
General
