Service manual

SERVICE MANUAL
SHARC,
Over The Range
Microwave Ovens
R-l 850A/R-1851 A/R-l 852A
Foreword
This manual has been prepared to provide Sharp
Electronics Corporation personnel with complete
operation and service information for Sharp microwave
oven models R-l 850A/R-1851 AIR-1 852A
It is recommended that service personnel carefully
study the entire text of this manual so they will be
qualified to render satisfactory customer service.
Check interlock switches and the door seal carefully.
Special attention must be given to avoid electrical shock
and microwave radiation hazards.
This supplemental service manual contains up-
date information only. Please refer to base model
service manual (R-1850) for complete service in-
formation.
WARNING
Never operate the oven until the following points are
ensured:
(A)The door is tightly closed.
(B)The door brackets and hinges are not defective.
(C)The door packing is not damaged.
(D)The door is not deformed or warped.
(E)There are no other visible signs of damage to the
oven.
DANGER
Certain initial parts are intentionally not grounded
and present a risk of electrical shock only during
servicing. Service personnel - Do not contact the
following parts while the appliance is energized;
High Voltage Capacitor, Power Transformer, Mag-
netron, High Voltage Rectifier Assembly and High
voltage Harness.
If provided, Vent Hood, Fan Assembly and Cooling
Fan motor.
All of the parts marked
“*I’ on parts list are used at volt-
ages more than 250V.
Removal of the outer case cabinet gives access to
voltage above 25OV.
All of the parts marked “A” on parts list may cause un-
due microwave exposure, by themselves, or when
they are damaged, loosened or removed.
Sharp Electronics Corporation
Sharp Plaza
Mahwah, New Jersey 07430-2135
I