Test Data At A Glance - Sharp R-733W Service Manual

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
screws.
6. Located door panel hinge pins into cavity hinge location
holes.
7. Re-install choke cover to door panel by clipping into
position.
Note: After any service to the door;
(A) Make sure that the monitor switch, monitored latch
switch and stop switch are operating properly. (Refer
to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards. (Refer to
Microwave Measurement Procedure.)
After any service, make sure of the following :
1. Door latch heads smoothly catch latch hook through latch
holes and that latch head goes through centre of latch
hole.
2. Deviation of door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
3. Door is positioned with its face pressed toward cavity face
plate.
4. Check for microwave leakage around door with an
approved microwave survey meter. (Refer to Microwave
Measurement Procedure.)
Note: The door on a microwave oven is designed to act
as an electronic seal preventing the leakage of
microwave energy from oven cavity during cook
cycle. This function does not require that door be

TEST DATA AT A GLANCE

Parts
Fuse
Special fuse
Thermal cut-out (MG)
Thermal cut-out (OVEN)
Oven lamp
High voltage capacitor
Magnetron
Power transformer
TEST POINT ON CONTROL UNIT
In/Out put terminal
Input terminal (Power supply)
Input terminal (Stop switch)
Output terminal (Oven lamp,
Fan motor, Turntable motor)
Output terminal (Power transformer)
Output terminal (Earth)
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
air-tight, moisture (condensation)-tight or light-tight.
Therefore, occasional appearance of moisture,
light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves, indicate a leakage of microwave energy
from oven cavity.
Symbol Value / Data
F1 F8A / 250V
F2 F15A / 250V
TC1 125°C
TC2 160°C
OL 200–250 V 25W E14
C 1.07µF AC 2100V
MG Filament < 1Ω
Filament – chassis ∞ ohm.
T Filament winding < 1Ω
Secondary winding Approx. 13Ω
Primary winding Approx. 1.9Ω
Test Point
A1-A3
B1–B2
A5–A3
No. of RY3–A3
B2–Chassis
R-733 -
26
Upper
Oven
Pin
Hinge
Upper Oven
Hinge
Door Panel
Lower Oven
Hinge
Choke Cover
Lower
Pin
Oven
Hinge
Figure C-6. Door Replacement
Resistance (Disconnect the
Volt power plug and close the door.)
Approx. 1043 Ω ohm.
230V
– 0.7 ohm.
230V Approx. 165Ω ohm.
230V Approx. 2.6 ohm.
– 0.7 ohm.