23
R-21JCA
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
OPERATION .......................................................................................................................................................... 4
SCHEMATIC DIAGRAM ........................................................................................................................................ 5
TEST PROCEDURE .............................................................................................................................................. 5
CONTROL PANEL ASSEMBLY ............................................................................................................................ 8
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 11
CONTROL PANEL CIRCUIT ............................................................................................................................... 14
PRINTED WIRING BOARD ................................................................................................................................. 15
PARTS LIST ........................................................................................................................................................ 16
PACKING AND ACCESSORIES ......................................................................................................................... 20
S8213R21HCPA/
LIGHT DUTY
COMMERCIAL
MICROWAVE OVEN
MODEL
R-21JCA
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 the following parts may result in a
severe, possibly fatal, electrical shock. (High Voltage Capaci-
tor, High Voltage Power Transformer, Magnetron, High Volt-
age Rectifier Assembly, High Voltage Harness etc..)
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
SUPPLEMENTAL SERVICE MANUAL
This is a supplemental Service Manual for Model R-21JCA. This model is quite similar to base
model R-21HC. Use this supplemental manual together with the Base Model Service Manual
(Reference No. is S7813R21HCP//) for complete operation, service information, etc..
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 SERVING
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 tim
er to
the desired tim
e. Oven will begin
operating im
mediately.
To shut oven off manually,return tim
er
to "0".
INSTRUCTIONS
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
Summary of Contents for R21JCA - Commercial Microwave Oven
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