Sharp R-9X55 User Manual

R-9X55
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
E) Set the timer to I minutes and 45 sec. start the oven at HIGH.
F) The time must be measured with stopwatch or wristwatch.
Gj After 1 minutes and 45 sec.. stop the oven by opening the door.
Hj Put the two (2) beakers out of the oven cavity and measure the temperature of the water by stirring
the water with thermometer and note them.
Example
I initial temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tl
= 10°C
T2 = 11 “C
: Temperature after 1 min. 45 set
. ..*.....................*.....................,..........., Tl = 20°C T2 = 21°C
/ Temperature difference Cold-Warm
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AT1
= 10°C AT2 = 10°C
j Mean temperature rise AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.T = (AT1 * AT2) / 2 = (1 O”C+lO”C) ! 2 = 10°C
I Measured output power
The equation
is
P= 80 x LIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P= 80 x
10°C = 800 Watts
NOTE: The measured output power should be at least i 15 % of the rated output power.
CAUTION:
1 “C CORRESPONDS TO 80 WATTS.
REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT.
r -1
-2s
Ji TC:r
7 7 i F
4 5
1 I
II
tib di
z
- -
= -
- -
- -
-
*
- -
- -
-- --
/
-yq or,
Lft
;TZOCi
.ec
B
POWER TRANSFORMER TEST
~~~R~~~N~: High voltages and large currents are present at the secondary winding and fila- ’
ment winding of the power transformer. It is very dangerous to work near this
i
part when the oven is on. NEVER make any voltage measurements at the high- 1
voltage circuits. in&ding the magnetron filament.
-~- --__
I
tC;AqRY OUT 33 CI-ECKS.
3fsconnect the leads to the primary wndrng of the power transformer. Disconnect the filament and
secondary wInding
csnnectons from the es: 0
f the HV circuitry. Using an ohmmeter, set on a low
range. it is possibie tc check the cont;nu:ry of al! thre
obTained :
e windings. The following readings should be
a. Primary winding
................................
less than 1 .I
ohms.
b. Secondary winding .................... approxrmately 65.5 ohms.
c.
Filament winding..
....................................
less than 1 ohm.
If the reading obtained a
re
should be replaced.
not as stated above. then the power transformer is probably faulty and
CARRY OUT 3 CHECKS
16

Sharp R-9X55 Specifications

General

Brand	Sharp
Model	R-9X55
Category	Microwave Oven
Language	English