Sharp R-733B, Service Manual

Page: 28 / 40

26 R-733 -
Figure C-6. Door Replacement
Parts Symbol Value / Data
Fuse F1 F8A / 250V
Special fuse F2 F15A / 250V
Thermal cut-out (MG) TC1 125
°
C
Thermal cut-out (OVEN) TC2 160
°
C
Oven lamp OL 200–250 V 25W E14
High voltage capacitor C 1.07
µ
F AC 2100V
Magnetron MG Filament < 1
Ω
Filament – chassis
∞
ohm.
Power transformer T Filament winding < 1
Ω
Secondary winding Approx. 13
Ω
Primary winding Approx. 1.9
Ω
TEST POINT ON CONTROL UNIT
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
Resistance (Disconnect the
In/Out put terminal Test Point Volt power plug and close the door.)
Input terminal (Power supply) A1-A3 230V Approx. 1043
Ω
ohm.
Input terminal (Stop switch) B1–B2 – 0.7 ohm.
Output terminal (Oven lamp, A5–A3 230V Approx. 165
Ω
ohm.
Fan motor, Turntable motor)
Output terminal (Power transformer)
No. of RY3–A3 230V Approx. 2.6 ohm.
Output terminal (Earth) B2–Chassis – 0.7 ohm.
TEST DATA AT A GLANCE
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
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.
Pin
Pin
Lower
Oven
Hinge
Lower Oven
Hinge
Upper
Oven
Hinge
Upper Oven
Hinge
Door Panel
Choke Cover