Samsung BF641FST User manual

OVEN
SERVICE Manual
OVEN CONTENTS
1. Precaution
2. Product Specication
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagrams
6. Wiring Diagrams
7. Schematic Diagrams
BASIC: BF641FST
MODEL: BF641FST
MODEL CODE: BF641FST/XEH
VERSION : 00,01,02
BF641FST_XFA_05291A.indb 1 2011-10-31 �� 1:33:19

Contents
1.Precaution............................................................................. 1
1-1Safetyprecautions .................................................................. 1
2. Specications .......................................................................... 2
2-1Features........................................................................... 2
2-2 Specication........................................................................ 3
2-3Accessory.......................................................................... 4
3. Disassembly and Reassembly ............................................................. 5
3-1ReplacementofDoorAssembly......................................................... 5
3-2ReplacementofDoorGlass............................................................ 6
3-3ReplacementoftherearovenLampBulb................................................. 9
3-4ReplacementofAssyControlBox...................................................... 10
3-5ReplacementofMotorFanCooling..................................................... 13
3-6 Replacement of Thermostat .....................................................13
3-7ReplacementofMotorConvection...................................................... 14
3-8ReplacementofHeaterConvectionSingle ............................................... 16
3-9 Replacement of Terminal Block ........................................................ 17
3-10 Replacement of SensorThermistor................................................17
3-11ReplacementofHeaterGrill.......................................................... 18
3-12ReplacementofHeaterBottom....................................................... 18
4. Troubleshooting........................................................................ 19
4-1PartCheckingmethod............................................................... 19
4-2FailureCodes...................................................................... 20
5. PCB Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5-1 PCB Diagram ...................................................................... 31
5-2PCBDiagram...................................................................... 32
6. Wiring Diagram ........................................................................ 35
6-1WiringDiagram .................................................................... 35
7. Schematic Diagram ..................................................................... 37
7-1SchematicDiagram................................................................. 37
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- 1 -
1. Precaution
Follow these special safety precautions.
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. Check all grounds.
3. Do not power the OVEN from a “2 -prong” AC cord.
Be sure that all of the built -in protective devices are
replaced. Restore any missing protective shields.
4. When reinstalling the chassis and its assemblies,
be sure to restore all protective devices including
nonmetallic control knobs and compartment covers.
5. Make sure that there are no cabinet openings
through which people --particularly children --might
insert objects and contact dangerous voltages.
6. Service technicians should remove their watches
while repairing an OVEN.
7. Design Alteration Warning:
Use exact replacement parts only, i.e., only those
that are specied in the drawings and parts lists of
this manual. Never alter or add to the mechanical or
electrical design of the OVEN. Any design changes
or additions will void the manufacturer’s warranty.
Always unplug the unit’s AC power cord from the
AC power source before attempting to remove or
reinstall any component or assembly.
8. Never defeat any of the B+ voltage interlocks. Do
not apply AC power to the unit (or any of its assem-
blies) unless all solid-state heat sinks are correctly
installed.
9. Some semiconductor (“solid state”) devices are
easily damaged by static electricity. Such compo-
nents are called Electrostatically Sensitive Devices
(ESDs). Examples include integrated circuits and
eld-effect transistors. Immediately before handling
any semiconductor components or assemblies,
drain the electrostatic charge from your body by
touching a known earth ground.
10. 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.
11. Components that are critical for safety are indi-
cated in the circuit diagram by shading,
or .
12. Use replacement components that have the same
ratings, especially for flame resistance and dielec-
tric strength specications. A replacement part
that does not have the same safety characteristics
as the original might create shock, re or other
hazards.
NOTE: Connect the oven to a 25 A.
When connecting the oven to a 16 A,
make sure that circuit breaker can operate.
13. Never touch any circuit wiring with your hand nor
with uninsulated tool during operation.
1-1 Safety precautions ( )
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- 2 -
2. Specications
BASIC NEW MODEL
Model Name BF641FST/XEU BF641FST/XEH
Model Type Install Single Built-in Single Built-in
Design Classic Classic
Main sales point Even cook Even cook
Oven Features
Cavity Interior C.Enamel C.Enamel
Oven Colors STSS STSS
Oven Doors (D: double, T: triple, Q: quadruple) T T
Door Opening Drop Down Drop Down
Interior Lamp 1(Bulb) 1(Bulb)
Interior Lights position Back Back
Control Method(Oven) Dial Dial
Display LED LED
Cleaning Method Oven - -
Heater Fixed Fixed
Electric Features
Oven Temp Ranges - Single 50~250 °C 50~250 °C
Grill Heater (In/Out) 1600W/700W 1600W/700W
Bottom Heater 600W 600W
Convection Heater (Upper/Lower) 1700W 1700W
Energy Class A A
Oven Function
Number of Functions 6 6
Single Mode 1. Convection Yes Yes
2. Top heat + convection Yes Yes
3. Conventional Yes Yes
4. Large Grill Yes Yes
5. Small Grill - -
6. Bottom + convection Yes Yes
7. Fast Preheating Yes Yes
Control Features
Clock Yes Yes
Child Safety Lock - -
Sound On/Off - -
Count Timer Yes Yes
2-1 Features
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2-1 Features
BASIC NEW MODEL
Cook Time - -
End Time - -
Oven Temp Yes Yes
Equipment Supplied
Multi spit No No
Barbecue spit No No
Square Baking Tray 1 1
Square Wire Rack 1 1
Specications BASIC NEWMODEL
Power source 230V 50Hz, AC 230V 50Hz, AC
Volume (usable capacity) 65L 65L
Output Power MAX 3,400W MAX 3,400W
Weight Net 33kg approx 33kg approx
Shipping 38kg approx 38kg approx
Outside dimensions 595(W)x595(D)x566(H) 595(W)x595(D)x566(H)
Shipping weight Net 33Kg, Gross 38Kg Net 33Kg, Gross 38Kg
Export Zone UK HUNGARY
2-2 Specication
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- 4 -
2-3 Accessory
Description Code No. Q’ty
Back
RACK-WIRE DG59-00001A 1
TRAY-BAKING A DG63-00012A 1
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- 5 -
3. Disassembly and Reassembly
3-1 Replacement of Door Assembly
Parts Explaination Photo Explaination
Door Assembly
1. Turn over the clips of both
hinges.
2. With both hands, grasp the
middle sides of the oven door.
3. Rotate the door by approx.
70degree until the hinges can
be taken out completely from
the hinges holes.
BF641FST_XFA_05291A.indb 5 2011-10-31 �� 1:33:20

- 6 -
3-2 Replacement of Door Glass (00, 01 version)
WARNING
Whenever the door is separated from the oven, the clips should always be turned over.
When the door is mounted, if some of the parts (Door glass or other parts) are removed from the door, it can
cause injury due to sheet.
ATTENTION
The glass may break if you use force especially on the edges of the front sheet.
Parts Explaination Photo Explaination
Door Glass
ScrewScrew
ScrewScrew
Door bracketDoor bracket
Glass #1Glass #1
1. Remove the two screws of the left and
right sides of the door.
2. Take off the door bracket.
Glass #1Glass #1
Glass #1
Printing
3. Detach the inner glass #1 (number 1)
from the door.
* When assembly the inner glass#1, put
printing to direction below.
Glass #2Glass #2
4. Detach the inner glass #2 and holder
glass rubber from the door.
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- 7 -
Parts Explaination Photo Explaination
Door Glass
Holder Glass
Rubber
Door Bracket
Glass #1
Glass #2
Glass #3
3-2 Replacement of Door Glass (Continued) (00, 01 version)
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- 8 -
3-2 Replacement of Door Glass (02 version)
WARNING
Whenever the door is separated from the oven, the clips should always be turned over.
When the door is mounted, if some of the parts (Door glass or other parts) are removed from the door, it can
cause injury due to sheet.
ATTENTION
The glass may break if you use force especially on the edges of the front sheet.
Parts Explaination Photo Explaination
Door Glass
1. Push the both side button.
2. Take off the Duct door.
3. Detach the inner glass #1 (number 1)
from the door.
* When assembly the inner glass#1, put
printing to direction below.
4. Detach the inner glass #2.
BF641FST_XFA_05291A.indb 8 2011-10-31 �� 1:33:22

- 9 -
3-2 Replacement of Door Glass (Continued) (02 version)
Parts Explaination Photo Explaination
Door Glass
The Assembly is reverse order of disjointing.
3-3 Replacement of the rear oven Lamp Bulb
Parts Explaination Photo Explaination
Lamp Bulb
1. Take off the cap by turning counterclockwise.
2. Remove the metal ring and the sheet ring and clean the
glass cap.
3. If necessary, replace the bulb with a 25 watt, 230 V, 300 °C
heat - resistant oven light bulb.
4. Fit the metal and the sheet ring to the glass cap.
5. Replace the glass cap.
BF641FST_XFA_05291A.indb 9 2011-10-31 �� 1:33:22

- 10 -
3-4 Replacement of Assy Control Box (00, 01 version)
Parts Explaination Photo
Assy
Control Box
Explaination Photo Explaination
1. Remove Three connectors from the
main pcb.
2. Remove the connector from Main TCO.
3. Remove the connector A and B.
2. Take off the three knob dial.
3. Remove three screws at both sides of
assy control box, lift up assy control box
and pull forward to separate.
Assy Select S/W
Parts
Motor Fan Cooling
Assy PCB Parts
(Main PCB)
Assy Display
A
B
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- 11 -
3-4 Replacement of Assy Control Box (02 version)
Parts Explaination Photo
Assy
Control Box
Assy Select S/W
Parts
Motor Fan Cooling
Assy PCB Parts
(Main PCB)
Assy Display
Explaination Photo Explaination
1. Remove Three connectors from the
main pcb.
2. Remove the connector A and B.
3. Take off the three knob dial.
4. Remove three screws at both sides of
assy control box, lift up assy control box
and pull forward to separate.
A
B
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- 12 -
3-4 Replacement of Assy Control Box (Continued)
Remove 4 screws.
Remove 2 screws.
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- 13 -
3-5 Replacement of Motor Fan Cooling
Parts Explaination Photo Explaination
Fan Cooling
1. Remove four screws.
Parts Explaination Photo Explaination
Thermostat
1. Remove two screws.
2. Unfold two points.
3-6 Replacement of Thermostat
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- 14 -
3-7 Replacement of Motor Convection (00, 01 version)
Nut-Hexagon cap
Main Blade
Spacer Fan
convection
Cavity
Cap Motor Convection
Motor
Convection
Upper Lower
Fan-Convection
Upper
Lower
Nut-Hexagon cap
Parts Explaination Photo Explaination
Motor
Convection
1. Remove four screws at the back inside
cavity to separate the cover casing.
2. Turn Nut-Hexagon cap to the left
to release and separate spacer fan
convection and fan convection.
Upper : Counterclockwise
Lower : Clockwise
3. Remove three screws securing motor
convection.
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- 15 -
Upper Lower
Fan-Convection
Upper
Lower
Nut-Hexagon cap
3-7 Replacement of Motor Convection (02 version)
Parts Explaination Photo Explaination
Motor
Convection
1. Remove four screws at the back inside
cavity to separate the cover casing.
2. Turn Nut-Hexagon cap to the left
to release and separate spacer fan
convection and fan convection.
Upper : Counterclockwise
Lower : Clockwise
3. Remove two connector from convection
motor.
4. Remove turn toward the counter-
clockwise to separate.
BF641FST_XFA_05291A.indb 15 2011-10-31 �� 1:33:31

- 16 -
3-8 Replacement of Heater Convection Single
Parts Explaination Photo Explaination
Heater
Convection
Single
1. Remove two screws securing heater
convection at the rear.
2. Pull the securing bracket at the left
forward, and pull it toward the left to
separate heater convection.
BF641FST_XFA_05291A.indb 16 2011-10-31 �� 1:33:32

- 17 -
Parts Explaination Photo Explaination
Terminal
Block
1. Remove two screws.
3-9 Replacement of Terminal Block
Parts Explaination Photo Explaination
Sensor
Thermistor
1. Remove a screw.
3-10 Replacement of Sensor Thermistor
BF641FST_XFA_05291A.indb 17 2011-10-31 �� 1:33:32

- 18 -
3-11 Replacement of Heater Grill
Parts Explaination Photo Explaination
Heater Grill
1. Remove each nut frange at right and left
sides.
2. Remove the two screws of inside cavity.
Parts Explaination Photo Explaination
Heater
Bottom
1. Remove a screw and pull forward to
separate it.
3-12 Replacement of Heater Bottom
BF641FST_XFA_05291A.indb 18 2011-10-31 �� 1:33:33