Read Sharp R-734 (serv.man2) Service Manual online
R-734 - 29
TEST DATA AT A GLANCE
PARTS
SYMBOL
VALUE / DATA
Special fuse
F1
20A / 250V
Fuse
F2
F 8A / 250V
Thermal cut-out (MAG.)
TC1
125
°
C Off
Thermal cut-out (OVEN)
TC2
145
°
C Off / 115˚C On
Grill heating element
GH
Approx. 56
Ω
/ Insulation resistance > 10 M
Ω
Oven lamp
OL
240–250 V 25W
High voltage capacitor
C
1.07
µ
F AC 2100V
Filament < 1
Ω
Magnetron
MG
Filament – chassis
∞
ohm.
Filament winding < 1
Ω
High voltage transformer
T
Secondary winding Approx. 130
Ω
Primary winding Approx. 2
Ω
WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.
6. Release two (2) pins of door panel from two (2) holes
upper and lower oven hinges by lifting up.
7. Now, door sub assembly is free from oven cavity.
8. Remove the six (6) screws holding the door panel to the
8. Remove the six (6) screws holding the door panel to the
door frame.
9. Now, door panel is free.
10.Slide latch head upward and remove it from door
10.Slide latch head upward and remove it from door
frame, releasing latch spring from door frame and
latch head.
latch head.
11.Now, latch head and latch spring are free.
12.Remove the one (1) screw holding the glass stopper to
12.Remove the one (1) screw holding the glass stopper to
the door frame.
13.Remove the glass stopper from the door frame.
14.Slide the front door glass upwards and then right-
14.Slide the front door glass upwards and then right-
wards.
15.Remove the door glass from the door frame.
16.Remove the handle covers A and B from the door
16.Remove the handle covers A and B from the door
frame.
17.Now, the door frame is free
RE-INSTALL
1. Re-install the front door glass to the door frame as
1. Re-install the front door glass to the door frame as
follows.
1) Insert the upper edge of the front door glass into the
1) Insert the upper edge of the front door glass into the
door frame.
2) Slide the front door glass downwards into the door
frame and then leftwards.
3) Re-install the glass stopper to the door frame with
one (1) screw.
2. Re-install the handle covers A and B to the door frame.
3. Re-install the latch spring to the latch head. Re-install
3. Re-install the latch spring to the latch head. Re-install
the latch spring to the door frame. Re-install latch head
to door frame.
to door frame.
4. Fit the door panel to the door frame with six (6) screws.
5. Insert two (2) pins of door panel on two (2) holes of
5. Insert two (2) pins of door panel on two (2) holes of
upper and lower oven hinges.
6. Re-install choke cover to door panel.
Note: After any service to the door;
(A) Make sure that the monitor switch, monitored
latch switch and stop switch are operating prop-
erly.
erly.
Figure C-9. Door Replacement
NOTE: When carrying out any repair to the door,
do not bend or warp the slit choke (tabs on
the door panel assembly) to prevent
microwave leakage.
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
PIN
PIN
LOWER
OVEN HINGE
OVEN HINGE
UPPER
OVEN HINGE
OVEN HINGE
LOWER
OVEN HINGE
OVEN HINGE
CHOKE COVER
DOOR
PANEL
PANEL
DOOR SUB
ASSEMBLY
ASSEMBLY
SLIT CHOKE
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