Sharp R-1874TYA

1
R-1874TYA
UPDATE
In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specified should
be used.
WARNING TO SERVICE PERSONNEL:
This service manual is intended for use by persons having electrical and mechanical training and a level of
knowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp Electronics
Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the
use of this manual.
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the
following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage
Power Transformer, High Voltage Rectifier, Heat sink, Magnetron, and High Voltage Harness etc..)
OVER THE RANGE MICROWAVE MODEL
SUPPLEMENTAL SERVICE MANUAL
This document has been published to be used for after sales service only. The contents are subject to change without notice.
SHARP ELECTRONICS CORPORATION
R-1874TYA
This is a supplemental Service Manual for Model R-1874TYA. Use this supplemental manual together with
the following base model for complete operation, service information, etc. R-1874TY S42M323R18OR4Y
(base model R-1855).
* FOR SERIAL NUMBERS: 514495 ~ AND ABOVE
Units with Serial Number range 514495 ~ and above employ a change to the
connectors on various Components, Harnesses and PWB’s.
Use this Service Manual for all units with the Serial Number range
514495 ~ and above.
*NOTE:

Sharp R-1874TYA Specifications

General

Style	over-the-range
Color	stainless steel
Total Capacity	1.1 cubic feet
Sensor Cooking	yes
Child Lock	yes
Timer	yes
Microwave Power	850 watts
Current	13.2 amperes

Weight and Dimensions

Depth	15.28 inches
Height	16.34 inches
Width	29.94 inches
Net Weight	71 pounds

Summary

OVER THE RANGE MICROWAVE MODEL

Service Personnel Safety

Crucial safety instructions for trained service personnel regarding potential electrical hazards.

OVER THE COUNTER MICROWAVE OVEN

General and Servicing Safety

Critical safety precautions, hazards, and component avoidance for operation and servicing.

Pre-Servicing Procedures

Essential checks and procedures to perform before starting any repair work on the appliance.

SCHEMATIC AND TEST PROCEDURES

Oven Schematic (Off Condition)

Electrical schematic diagram illustrating the oven's circuit configuration in the off state.

Switching Power Supply Test

Step-by-step guide for testing the switching power supply unit and related connections.

Pictorial Diagram

Component Layout and Wiring

Visual representation of component placement and wiring for the microwave oven.

PARTS LIST - ELECTRIC, CABINET, CONTROL PANEL, OVEN

Electric Parts

List of electrical components with part numbers, quantities, and codes.

Cabinet Parts

Catalog of cabinet and external structural components with part details.

Control Panel Parts

List of components related to the oven's control panel and user interface.

Oven Parts

Inventory of internal oven components and their respective part information.

PARTS LIST - ADDITIONAL CATEGORIES

Miscellaneous Parts

List of miscellaneous items, including installation materials and labels.

PARTS LIST - SCREWS AND ACCESSORIES

Screws, Nuts, and Washers

Detailed list of fasteners and hardware used in the appliance assembly.

Miscellaneous Parts Diagram

Illustrations of various miscellaneous parts and their identification numbers.

OVEN AND CABINET PARTS DIAGRAM

Component Layout Diagram

Detailed exploded view showing the assembly of oven and cabinet components.

CONTROL PANEL AND DOOR PARTS DIAGRAMS

Control Panel Assembly Diagram

Diagram illustrating the assembly of the microwave's control panel components.

Door Assembly Components Diagram

Diagram showing the parts that make up the microwave oven door.

PACKING AND ACCESSORIES

Packing Materials and Contents

List and illustration of materials used for packaging and accessories included with the microwave.

NOTES