R307KW
11 – 3
11.Now, the magnetron is free.
2. REINSTALLATION
1. Reinstall the magnetron to waveguide flange with the four (4)
screws.
2. Reinstall the air duct to the oven cavity top plate and the magnetron
with two (2) screws.
3. Insert the end of the chassis support into the hole of the oven cavity
front flange.
4. Hold the other end of the chassis support to the magnetron with the
one (1) screw.
5. Reconnect the wire leads to the magnetron. Refer to “PICTORIAL
DIAGRAM”.
6. Reinstall outer case and check that the oven is operating properly.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F.
GASKET IS IN PLACE AND MOUNTING SCREWS ARE
TIGHTENED SECURELY.
[6] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) 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. Push the lever of positive lock
®
connector.
5. Pull down on the positive lock
®
connector.
CAUTION: WHEN CONNECTING THE POSITIVE LOCK
®
CONNEC-
TORS TO THE TERMINALS, CONNECT THE POSITIVE
LOCK
®
SO THAT THE LEVER FACES YOU
Figure C-1. Positive lock
®
connector
[7] CONTROL PANEL ASSEMBLY REMOVAL
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. Disconnect the wire leads from the control unit.
5. Remove the one (1) screw holding the control panel assembly to
the oven flange.
6. Slide the control panel assembly upward and remove it.
7. Now, individual components can be removed.
[8] GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT
1. REMOVAL
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. Remove the control panel assembly, referring to chapter of CON-
TROL PANEL ASSEMBLY REMOVAL.
5. Remove the two (2) screws holding the control unit to the control
panel frame. And remove the control unit.
6. Remove the rubber connector from the long slit on the control panel
frame.
7. Tear away the graphic sheet from the control panel frame.
8. Tear away the membrane switch from the control panel frame.
2. REINSTALL
1. Remove remaining adhesive on the control panel frame surfaces
with a soft cloth soaked in alcohol.
2. Tear the backing paper from the new membrane switch.
3. Insert the ribbon cable of the membrane switch into the slit of the
control panel frame.
4. Adjust the upper edge and right edge of the membrane switch to
the small depression on the surface of the control panel frame.
5. Attach the membrane switch to the control panel frame by rubbing
with a soft cloth not to scratch.
6. Tear the backing paper from the new graphic sheet.
7. Adjust the upper edge and left edge of the graphic sheet to the
large depression on the surface of the control panel frame.
8. Attach the graphic sheet to the control panel frame by rubbing with
a soft cloth not to scratch.
9. Tear the small backing paper from the ribbon cable of the mem-
brane switch.
10.Attach the ribbon cable to the control panel frame rear side.
11.Place the edge of the membrane switch’s ribbon cable on the lower
portion of the liquid crystal display.
12.Insert the rubber connector into the long slit on the control panel
frame.
13.Reinstall the control unit to the control panel frame with the two (2)
screws.
NOTE:
Do not contact the contact surface of the ribbon cable
(edge) and the rubber connector directly with your fin-
gers. This is to avoid
oxidation
. If display digits are missing
or scrambled, remove control unit and clean contact sur-
face with alcohol. After cleaning, do not attach the rubber
connector until alcohol dries up. Do not use alcohol or
solution to clean the rubber connector. Make sure that
there is no trash or foreign substance on contact surface
of the rubber connector.
Terminal
Push
Pull down
1
2
Lever
Positive lock¨
connector
