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Sharp R-426HS - User Manual

Sharp R-426HS
48 pages
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R-426HS
R-426HK
R-426HW
In the interest of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Recti-
fier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.................. INSIDE FRONT COVER
BEFORE SERVICING..................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL .............................................................................................................. 1
MICROWAVE MEASUREMENT PROCEDURE .................................................................................................. 2
FOREWORD AND WARNING ............................................................................................................................. 3
PRODUCT SPECIFICATIONS............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................. 4
OPERATION ........................................................................................................................................................ 6
TROUBLESHOOTING GUIDE .............................................................................................................................10
TEST PROCEDURE ............................................................................................................................................11
TOUCH CONTROL PANEL ..................................................................................................................................22
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..................................................................28
PICTORIAL DIAGRAM ........................................................................................................................................35
CPU UNIT CIRCUIT.............................................................................................................................................36
PRINTED WIRING BOARD .................................................................................................................................37
PARTS LIST........................................................................................................................................................38
PACKING AND ACCESSORIES .........................................................................................................................42
S13M203R426HE
R-426HS
R-426HK
R-426HW
MICROWAVE OVEN
MODELS
SERVICE MANUAL
SHARP ELECTRONCS CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
R-426HS

Questions and Answers

  • K
    Kevin RichardsonAug 16, 2025
    Why is my Sharp R-426HS running but not heating?
    • A
      Adam ArellanoAug 16, 2025
      If your Sharp Microwave Oven appears to be working but isn't heating food, inspect the magnetron and high voltage components.
  • G
    guerrabrittanyAug 19, 2025
    What to do if my Sharp Microwave Oven doesn't start when I press the START button?
    • T
      Tami MendezAug 19, 2025
      If your Sharp Microwave Oven doesn't start cooking when you press the START pad, check the control pad and its connections.
  • K
    Kelly RiveraAug 22, 2025
    Why isn't my Sharp R-426HS Microwave Oven defrosting food properly in COMPU DEFROST mode?
    • J
      Julia StewartAug 22, 2025
      If your Sharp Microwave Oven enters COMPU DEFROST mode but the food isn't defrosting well, check the AH sensor and defrost settings.
  • B
    bowersjamesAug 25, 2025
    Why doesn't the light turn off when I close the door on my Sharp R-426HS?
    • J
      Jonathan CraigAug 25, 2025
      If the oven lamp in your Sharp Microwave Oven stays on even when the door is closed, check the door sensing switch.
  • D
    Dr. Patricia Chavez DDSAug 27, 2025
    What to do if the C/T fuse blows when plugging in my Sharp R-426HS?
    • B
      Brandon OlsonAug 27, 2025
      If the C/T fuse blows when plugging in your Sharp Microwave Oven, first check the monitor switch, relay (RY1) secondary interlock relay (RY2), door sensing switch and primary interlock switch before replacing the C/T fuse. Then replace the C/T fuse.
  • J
    Jennifer BrownAug 30, 2025
    What should I check if the lamp is on, but the fan and turntable aren't working in my Sharp R-426HS Microwave Oven?
    • L
      Lindsey TaylorAug 30, 2025
      If the oven lamp in your Sharp Microwave Oven is lit, but the fan motor and turntable motor aren't running, inspect the fan motor and turntable motor connections.
  • B
    brandi12Sep 2, 2025
    What to do if my Sharp Microwave Oven isn't cooking correctly in Cooking Power P-50 mode?
    • B
      Brian KempSep 2, 2025
      If your Sharp Microwave Oven isn't cooking properly when programmed for Cooking Power P-50 mode, check the settings and operation of Cooking Power P-50.
  • A
    Aaron NelsonSep 4, 2025
    Why does my Sharp Microwave Oven stop 16 seconds after starting?
    • D
      Donna SimpsonSep 4, 2025
      If your Sharp Microwave Oven stops 16 seconds after starting, check the control system and timers.
  • D
    Dr. Edward HarrisonSep 7, 2025
    What to do if the AH sensor doesn't end during sensor cooking on my Sharp R-426HS?
    • K
      Kathleen AndersonSep 7, 2025
      If the AH sensor doesn't end during sensor cooking with your Sharp Microwave Oven, inspect the AH sensor function.
  • S
    Stephen RichardsSep 10, 2025
    Why is the display blank when I plug in my Sharp Microwave Oven?
    • S
      Sharon BrewerSep 10, 2025
      If all letters and indicators do not appear in the display when you first plug in your Sharp Microwave Oven, check the power connection or display components.

Sharp R-426HS Specifications

General IconGeneral
TypeMicrowave Oven
Power Output900 W
TurntableYes
Defrost FunctionYes
Child Safety LockYes
Capacity25 Litres
Dimensions (W x D x H)20.9 x 16.9 x 12.2 inches
Turntable Diameter12.4 inches
Exterior Dimensions20.9 x 16.9 x 12.2 inches
Weight14.5 kg

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