Pictorial Diagram - Sharp R-300BW Service Manual

R-300BW
CAUTION: 1. DISCONNECT OVEN FROM POWER SUP
PLY BEFORE REMOVING OUTER CASE.
2. DISCHARGE THE HIGH VOLTAGE CA-
PACITOR BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
NOTE: When replacing the outer case, the 2 special
Torx screws must be reinstalled in the same
locations.
1. Disconnect the power supply cord and remove outer
case.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect wire leads from power transformer,
magnetron and capacitor terminals.
5. Remove four (4) screws holding transformer to bottom
right plate.
6. Remove transformer from bottom right plate.
7. Remove the one (1) terminal insulator and tube from
filament lead (longer one) of power transformer.
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Open covers of the terminal insulator by using small flat
type screw driver.
5. Remove the receptacle from the terminal insulator.
6. Now, the terminal insulator is free.
Terminal
insulator
HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL
1. Disconnect the power supply cord and remove outer
case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the high voltage wire B from the high voltage
capacitor.
5. Disconnect the high voltage wire of high voltage rectifier
assembly from the magnetron.
6. Remove one (1) screw holding capacitor holder to oven
cavity rear plate.
POWER TRANSFORMER REMOVAL
TERMINAL INSULATOR REPLACEMENT
Flat type
screw driver
22
Special screw
Screw Driver
(Type: TORX T20 H or
GTXH20-100)
Re-install
1. Install the terminal insulator to receptacle of filament
lead (longer one) of power transformer.
2. Rest transformer on the bottom right plate with its primary
terminals toward the oven face plate.
3. Secure transformer with four screws to bottom right plate.
4. Re-connect wire leads (primary and high voltage) to
power transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to
"PICTORIAL DIAGRAM" on page 27.
5. Re-install outer case and check that oven is operating
properly.
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown below.
3. Reconnect all leads removed from components during
testing.
4. Reinstall the outer case (cabinet).
5. Reconnect the power supply cord after the outer case is
installed.
6. Run the oven and check all functions.
COVERS
RECEPTACLE
7. Disconnect rectifier terminal from capacitor.
High voltage rectifier assembly is now free.
8. Remove one (1) screw holding high voltage rectifier
assembly to capacitor holder.
9. Remove capacitor holder. Capacitor is now free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-
FIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH
VOLTAGE RECTIFIER MUST BE SECURED
FIRMLY WITH A GROUNDING SCREW.