Outer Case Removal; Power Transformer Removal - Sharp R-1880LS Service Manual

REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven)
1. Disconnect the power supply cord, and uncoil the power supply cord.
. Remove the turntable tray and support from the oven cavity.
3. Remove the two () screws holding the oven (outer case
cabinet) to the top cabinet.
4. Remove the two () grease filters from the base cover.
5. While supporting the front of the oven, unfasten the two ()
unit mounting screws holding the oven to the unit mounting
plate.
6. Lower the front of the oven and pull the power cord out of the
wall cabinet.
Remove the oven from the wall and proceed as follows;
1. Disconnect the power supply cord.
. Open the door block it open.
3. Remove one (1) screw holding the hood exhaust louver to the
oven, and pull it forward to remove by pushing the right and
left tabs of the hood exhaust louver. (Refer to procedure of
"HOOD EXHAUST LOUVER REMOVAL".)
4. Remove four (4) screws holding the rear stay to the hood fan
motor or the oven, and remove it.
5. Remove the four (4) screws from the rear of the outer case
cabinet.
UNIT MOUNTING SCREW AND HOOD INTAKE DUCT R REMOVAL
1. Disconnect the power supply cord and remove the oven from
the wall and remove the outer case of the oven.
. Open the door block it open.
3. Bend the tab of the oven cavity back plate.
4. Lift the unit mounting screw off the tab.
5. Slide down it from the base plate right. Now , the unit mounting
screw is free.
1. Disconnect the power supply cord and remove the oven from
wall, remove outer case, remove the unit mounting screw and
hood intake duct R. (Refer to procedure of "Removal of Oven
from W all", "Outer Case Removal" and "Unit Mounting Screw
and Hood Intake Duct R Removal".)
. Open the door block it open.
3. Discharge high voltage capacitor.
4. Disconnect filament leads of transformer from the magnetron
and capacitor.
5. Disconnect high voltage leads of capacitor from the
transformer.
6. Disconnect wire leads from transformer.
7. Remove two () screws holding the transformer to base plate
HOOD FAN MOTOR, HOOD EXHAUST DUCT AND OVEN LAMP SOCKET AND AH SENSOR
1. Disconect the power supply and remove the oven from wall
and remove outer case. (Refer to procedure of "Removal of
Oven from Wall" and "Outer case Removal")
. Open the door and block it open
3. Disconnect the 6-pin connector of the hood fan motor from
the main wire harness located at the right edge of the hood
exhaust duct.
4. Disconnect the connector CN-F from the control unit.
5. Remove three (3) screws holding the hood exhaust duct
to the oven cavity.
7. Lift the oven up off the hooks at the bottom of the mounting
8. The oven is now free and can be placed on the work surface
9. Installation is the reverse of this procedure.

OUTER CASE REMOVAL

6. Slide the outer case cabinet back about 1 inch (3 cm) to free
7. Disconnect the three (3) pin connector of the power supply
8. Discharge high voltage capacitor.
CAUTION: 1. DISCONNECT O VEN F ROM P OWER S UPPLY
6. Remove the three (3) screws holding the hood intake duct R
7. Slide the hood intake duct R out of the right side of the
8. Now the hood intake duct R is free
9. Discharge the high voltage capacitor.

POWER TRANSFORMER REMOVAL

Re-install
1. Rest the transformer on the base plate right with its primary
. Secure the transformer with two () screws to base plate
3. Re-connect wire leads (primary and high voltage) to the
4. Re-install the hood intake duct R, and the outer case and
5. check that oven is operating properly.
CAUTION: MAKE SURE THE W IRE LEADS NEVER TOUCH
6. Remove two () screws holding the hood exhaust duct to the
7. Release the 6-pin connector and the 3-pin connector of the
8. Release the one (1) snap band of the main harness A from the
9. Release the snap band of the wire cord of the hood fan motor
41
plate.
selected for servicing the oven.
it from retaining clips on the cavity face plate.
cord from the wiring harness and remove the power supply
cord together with the outer case.
BEFORE REMOVING OUTER CASE.
. DISCHARGE THE HIGH VOLTAGE
CAPACITOR BEFORE TOUCHING ANY
OVEN COMPONENTS OR WIRING.
to the base plate right, fan duct and the oven cavity.
oven.
right.
terminals toward the control panel.
right.
transformer and filament leads of transformer to magnetron and
high voltage capacitor. Refer to "PICTORIAL DIAGRAM".
THE FAN BLADE.
exhaust duct.
main harness A from the hood exhaust duct.
left edge of the hood exhaust duct.
from the hood exhaust duct.
R-1880LS/LST