R-21JCA-F
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 contain
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 Rectifier 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 .............................................................................................................................. 9
TEST PROCEDURE ............................................................................................................................................ 10
TOUCH CONTROL PANEL ................................................................................................................................. 16
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 20
PICTORIAL DIAGRAM ........................................................................................................................................ 27
CONTROL PANEL CIRCUIT .............................................................................................................................. 28
PRINTED WIRING BOARD ................................................................................................................................. 29
PARTS LIST ........................................................................................................................................................ 30
PACKING AND ACCESSORIES ......................................................................................................................... 34
S0514R21JCPAF
R-21JCA-F
LIGHT DUTY
COMMERCIAL
MICROWAVE OVENS
MODEL
SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
1000W/ R-21JCA
C O M M E R C
I A L M I C R O
W A V E O V E N
TIME GUIDE FOR ONE SERVIN
G
15 - 30 sec.
Bagel, Roll
Muffin, Pastry
Pie Slice
30 - 60 sec.
Hot Dog
Pizza Slice
Small Sandwich
1 - 2 min.
Beverage, Soup
Large Sandwich
Popcorn, 1.5 oz.
2 - 3 min.
Casserole, Stew
Chili, Chowder
Popcorn, 3.5 oz.
With the door closed
,turn the timer to
the desired time. O
ven will begin
operating immediate
ly.
To shut oven off m
anually,return tim
er
to "0".
INSTRUCT
IONS
0
10
20
30
40 50
1
1.5
2
2.5
3
4
5
6
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
