Sharp R-290H, Руководство по обслуживанию

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R-290H(S)
19
3. Remove the three (3) screws holding the magnetron to
the waveguide.
4. Remove the magnetron from waveguide.
5. Now, the magnetron is free.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Remove one (1) screw holding capacitor holder to rear
cabinet.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from the magnetron.
4. Disconnect the filament lead of the power transformer
from the H.V. capacitor.
5. Remove one (1) screw holding ground side terminal of
high voltage rectifier assembly, and remove capacitor
holder.
6. Disconnect all the leads and terminals of high voltage
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
rectifier assembly from high voltage capacitor.
7. Now the H.V. rectifier assembly and H.V. capacitor
should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE REC-
TIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (GROUND) CONNECTION IS
SECURELY FIXED TO THE CAPACITOR
HOLDER WITH A GROUNDING SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLT-
AGE RECTIFIER. WHEN REPLACING IT,
REPLACE HIGH VOLTAGE RECTIFIER
ASSEMBLY.
Terminal
Push
Pull down
1
2
Lever
Positive lock®
connector
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads (main wire harness) from
power transformer.
3. Disconnect the lead from magnetron filament.
4. Disconnect the leads of the power transformer from
high voltage capacitor.
5. Remove the two (2) screws holding the transformer to
bottom plate from the upper side.
6. Remove the remaining two (2) screws from the bottom.
7. Remove the transformer.
8. Now the power transformer is free.
POWER TRANSFORMER REMOVAL
Re-install
1. Rest transformer on the bottom plate with its primary
terminals toward the oven face plate.
2. Secure transformer with four (4) screws to the bottom
plate.
3. Re-connect wire leads (primary and high voltage) and
filament leads to the power transformer, magnetron
and high voltage capacitor, referring to "Pictorial Dia-
gram".
4. Re-install outer case and check that the oven is oper-
ating properly.
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
®
connector.
3. Pull down on the positive lock
®
connector.
CAUTION: WHEN CONNECTING THE POSITIVE
LOCK
®
CONNECTORS TO THE TERMI-
NALS, INSTALL THE POSITIVE LOCK
®
SO
THAT THE LEVER FACES YOU
POSITIVE LOCK
®
CONNECTOR (NO-CASE TYPE) REMOVAL
Figure C-1. Positive lock
®
connector
1. CARRY OUT 3D CHECKS.
2. Disconnect the leads from the control unit.
3. Remove the one (1) screw holding the control panel
decoration to the oven cavity front plate.
CONTROL PANEL ASSEMBLY REMOVAL
4. Remove the one (1) screw holding the control panel to
the front plate of the oven cavity.
5. Now, the control panel assembly is free.
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly, referring to chap-
ter of CONTROL PANEL ASSEMBLY REMOVAL.
3. Remove the three (3) screws holding the control unit to
the control panel frame. And remove the control unit.
GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT
4. Remove the rubber connector from the long slit on the
control panel frame.
5. Tear away the graphic sheet from the control panel frame.
6. Tear away the membrane switch from the control panel
frame.