SAMSUNG CE935GRSBTW Service Manual
MICROWAVE OVEN
CE935GR
SERVICE
Manual
MICROWAVE OVEN
CONTENTS
1. Precaution
2. Specifications
3. Operating Instructions
4. Disassembly and Reassembly
5. Alignment and Adjustments
6. Troubleshooting
7. Exploded Views and Parts List
8. Schematic Diagrams
BWT
GRILL
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Samsung Electronics
(a) Do not operate or allow the oven to be operated
with the door open.
(b) Make the following safety checks on all ovens
to be serviced before activating the magnetron
or other microwave source, and make repairs as
necessary:
(1) Interlock operation,
(2) proper door closing,
(3) seal and sealing surfaces (arcing, wear, and
other damage),
(4) damage to or loosening of hinges and latches,
(5) evidence of dropping or abuse.
(c) Before turning on microwave power for any
service test or inspection within the microwave
generating compartments, check the magnetron,
wave guide or transmission line, and cavity for
proper alignment, integrity, and connections.
(d) Any defective or misadjusted components in
the interlock, monitor, door seal, and
microwave generation and transmission
systems shall be repaired, replaced, or adjusted
by procedures described in this manual before
the oven is released to the owner.
(e) A Microwave leakage check to verify
compliance with the Federal performance
standard should be performed on each oven
prior to release to the owner.
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
1. Precaution
1-1 Safety precautions ( )
Samsung Electronics 1-1
1. All repairs should be done in accordance
with the procedures described in this
manual. This product complies with
Federal Performance Standard 21 CFR
Subchapter J (DHHS).
2. Pacemaker wearers must consult a physician
before attempting to service an MWO.
8. Notify the Central Service Center if the
microwave leakage exceeds 5 mw/cm
2
4. Check all grounds.
5. Do not power the MWO from a "2-prong"
AC cord. Be sure that all of the built-in
protective devices are replaced. Restore any
missing protective shields.
6. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including: nonmetallic control
knobs and compartment covers.
7. Make sure that there are no cabinet openings
through which people--particularly
children--might insert objects and contact
dangerous voltages. Examples: Lamp hole,
ventilation slots.
8. In the event of suspected microwave energy
leakage in excess of 5mW/§†, please notify
J.V.SAMSUNG SERVICE LTD.
MARSHAL ZHUKOU.,1.OFFICE 201
123308,MOSCOW,RUSSIA
9. Service technicians should remove their
watches while repairing an MWO.
10. To avoid any possible radiation hazard,
replace parts in accordance with the wiring
diagram. Also, use only the exact
replacements for the following parts:
Primary and secondary interlock switches,
interlock monitor switch.
11. If the fuse is blown by the Interlock Monitor
Switch: Replace all of the following at the
same time: Primary and secondary switches,
as well as the Interlock Monitor Switch. The
correct adjustment of these switches is
described elsewhere in this manual. Make
sure that the fuse has the correct rating for
the particular model being repaired.
12. Design Alteration Warning:
Use exact replacement parts only, i.e.,
only those that are specified in the
drawings and parts lists of this manual.
This is especially important for the
Interlock switches, described above.
Never alter or add to the mechanical or
electrical design of the MWO. Any design
changes or additions will void the
manufacturer's warranty.10.Always unplug
the unit's AC power cord from the AC
power source before attempting to
remove or reinstall any component or
assembly.
13. Never defeat any of the B+ voltage
interlocks. Do not apply AC power to the
unit (or any of its assemblies) unless all
solid-state heat sinks are correctly installed.
14. Some semiconductor ("solid state") devices
are easily damaged by static electricity. Such
components are called Electrostatically
Sensitive Devices (ESDs). Examples include
integrated circuits and field-effect
transistors.
Immediately before handling any
semiconductor components or assemblies,
drain the electrostatic charge from your
body by touching a known earth ground.
15. Always connect a test instrument's ground
lead to the instrument chassis ground
before
connecting the positive lead; always remove
the instrument's ground lead last.
Follow these special safety precautions. Although the microwave oven is completely safe during ordinary
use, repair work can be extremely hazardous due to possible exposure to microwave radiation, as well as
potentially lethal high voltages and currents.
16. When checking the continuity of the witches
or transformer, always make sure that the
power is OFF, and one of the lead wires is
disconnected.
17. Components that are critical for safety are
indicated in the circuit diagram by
shading, or .
18. Use replacement components that have the
same ratings, especially for flame resistance
and dielectric strength specifications. A
replacement part that does not have the
same safety characteristics as the original
might create shock, fire or other hazards.
1. High Voltage Warning
Do not attempt to measure any of the high
voltages--this includes the filament voltage
of the magnetron. High voltage is present
during any cook cycle.
Before touching any components or wiring,
always unplug the oven and discharge the
high voltage capacitor (See Figure 1-1)
2. The high-voltage capacitor remains charged
about 30 seconds after disconnection. Short
the negative terminal of the high-voltage
capacitor to the oven chassis. (Use a
screwdriver.)
3. High voltage is maintained within specified
limits by close-tolerance, safety-related
components and adjustments. If the high
voltage exceeds the specified limits, check
each of the special components.
1-2
Pretaution
Samsung Electronics
1-2 Special Servicing Precautions (Continued)
1-3 Special High Voltage Precautions
Fig. 1-1. Discharging the High Voltage Capacitor
2. Specifications
2-1 Table of Specifications
Samsung Electronics 2-1
MODEL CE935GR
ITEM
TIMER 60 MINUTES
POWER SOURCE 230V/50HZ, AC
POWER CONSUMPTION MICROWAVE : 1,500W,GRILL : 1,300W
OUTPUT POWER FROM135W TO 900W (6 LEVEL POWER INCLUDING DEFROST)
(IEC-705 TEST PROCEDURE)
OPERATING FREQUENCY 2,450MHz
MAGNETRON OM75PH(31)
COOLING METHOD COOLING FAN MOTOR
OUTSIDE DIMENSIONS 517(W) x 297(H) x 382(D)
NET WEIGHT 20Kg.
SHIPPING WEIGHT 23Kg
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3. Operating Instructions
3-1 Control Panel
Samsung Electronics 3-1
3-2 Features & External Views
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Door
Ventilation Slot Light
Safety Interlock Holes
Control Panel
Open Door Push Button
Guide Roller
GRILL WIRE RACK
Glass Plate
Door Latches
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CE935GR
517mm
369mm
275mm
216.4mm
382mm
GRILL
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4. Disassembly and Reassembly
4-1 Replacement of Magnetron, Motor Assembly and Lamp
Samsung Electronics 4-1
Remove the magnetron including the shield case,
permanent magnet, choke coils and 500pF
capacitors (all of which are contained in one
assembly).
1. Disconnect all lead wires from the magnetron
and lamp.
2. Remove the bracket mounting.
3. Remove the air cover.
4. Remove screws securing the magnetron to the
wave guide.
5. Take out the magnetron very carefully.
6. Remove screws from the back panel.
7.Remove the assy noise filter.
8. Take out the fan motor.
9. Remove the oven lamp by pulling out from hole
of air cover carefully.
10. NOTE1: When removing the magnetron, make
sure that its antenna does not hit any
adjacent parts, or it may be damaged.
11. NOTE2: When replacing the magnetron, be
sure to remount the magnetron gasket
in the correct position and make sure
the gasket is in good condition.
1. Discharge the high voltage capacitor.
2. Disconnect all the leads.
3. Remove the mounting bolts.
4. Reconnect the leads correctly and firmly.
4-2 Replacement of High Voltage Transformer
Lamp
Cover Air
Magnetron
H. V. Trans
H. V. Capacitor
Screw
Thermo S/W
Fan Motor
H. V. Trans
Bolts
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