Duke DSO 500 Bedienungsanleitung
Service Manual
Please read this manual completely before attempting to
install, operate or service this equipment
This manual is Copyright ©2011 Duke Manufacturing Company. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
trademark of the Duke Manufacturing Company.
Duke Manufacturing Company
2305 N. Broadway
St. Louis, MO 63102
Phone: 314-231-1130
Toll Free: 1-800-735-3853
Fax: 314-231-5074
www.dukemfg.com
SPEED OVEN
MODEL
DSO 500
P/N 168465B
Service Manual for Speed Oven Model DSO 500
2
3
SAFETY PRECAUTIONS
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(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.
CAUTION: When servicing the unit, be sure no electrical wires contact a sharp edge.
Check all wiring for possible cuts and/or abrasions, which can occur during servicing.
SAFETY PRECAUTIONS
Service Manual for Speed Oven Model DSO 500
4
TABLE OF CONTENTS
SAFETY PRECAUTIONS ....................................................................................................................3
INTRODUCTION .................................................................................................................................6
MAIN FEATURES ..........................................................................................................................7
INSTALLATION ...................................................................................................................................8
UNPACKING OVEN ......................................................................................................................8
RADIO INTERFERENCE ..............................................................................................................8
OVEN PLACEMENT......................................................................................................................8
ELECTRICAL INFORMATION .......................................................................................................8
EARTHING INSTRUCTIONS ........................................................................................................9
EXTERNAL EQUIPOTENTIAL ......................................................................................................9
SPECIFICATIONS .............................................................................................................................10
INPUT POWER ...........................................................................................................................10
OUTPUT POWER .......................................................................................................................10
DIMENSIONS ..............................................................................................................................10
WEIGHT ......................................................................................................................................10
RECOMMENDED CLEARANCES ..............................................................................................10
INTERNAL COOKING CAVITY DIMENSIONS............................................................................10
PREVENTIVE MAINTENANCE .........................................................................................................11
CLEANING ..................................................................................................................................11
SERVICING PROCEDURES ............................................................................................................12
GENERAL ....................................................................................................................................12
COMPONENT OVERVIEW ...............................................................................................................13
STIRRER MOTOR AND GEARBOX ...........................................................................................13
HIGH VOLTAGE TRANSFORMERS ...........................................................................................15
HIGH VOLTAGE RECTIFIERS ....................................................................................................17
HIGH VOLTAGE CAPACITORS ..................................................................................................19
MAGNETRONS ...........................................................................................................................21
MAGNETRON THERMAL SWITCHES .......................................................................................23
SOLID STATE RELAYS ...............................................................................................................25
MECHANICAL RELAYS AND INTERLOCK SWITCHES ............................................................27
HEATERS AND THERMAL CUTOUTS .......................................................................................29
LINE FUSES ................................................................................................................................31
JET PLATES ................................................................................................................................33
CABINET COOLING FANS .........................................................................................................35
5
MAGNETRON COOLING FANS .................................................................................................37
CABINET THERMAL SWITCH ....................................................................................................39
KEYPAD/CONTROL BOARD ......................................................................................................41
INVERTERS ................................................................................................................................43
SYSTEM TESTING ...........................................................................................................................45
POWER OUTPUT MEASUREMENT ..........................................................................................45
MICROWAVE LEAKAGE TEST ...................................................................................................45
COMPONENT TESTING ...................................................................................................................47
POWER TRANSFORMER TEST ................................................................................................47
DISCHARGING THE HIGH VOLTAGE SYSTEM ON THE DUKE SPEED OVEN. .....................48
HIGH VOLTAGE CAPACITOR TEST ..........................................................................................49
HIGH VOLTAGE RECTIFIER TEST ............................................................................................50
MECHANICAL RELAYS AND INTERLOCK SWITCHES ............................................................51
REPAIR PROCEDURES ...................................................................................................................53
RELAY AND SWITCH REPLACEMENT ......................................................................................53
LINE FUSE REPLACEMENT ......................................................................................................54
INVERTER REPLACEMENT .......................................................................................................55
BLOWER MOTOR REPLACEMENT ...........................................................................................56
ELECTRICAL PANEL REPLACEMENT ......................................................................................58
MAGNETRON REPLACEMENT .................................................................................................59
STIRRER MOTOR REPLACEMENT ...........................................................................................60
HEATER ELEMENT REPLACEMENT ........................................................................................61
CABINET THERMAL SWITCH REPLACEMENT ........................................................................62
HIGH VOLTAGE TRANSFORMER REPLACEMENT..................................................................63
FRONT THERMAL COOLING FAN REPLACEMENT .................................................................64
INTAKE AND EXHAUST FANS REPLACEMENT .......................................................................65
ADJUSTMENTS ..........................................................................................................................66
TROUBLESHOOTING ......................................................................................................................67
SCHEMATIC DIAGRAM ....................................................................................................................71
SPARE PARTS LIST .........................................................................................................................72
APPENDIX A INVERTER PROGRAMMING .....................................................................................73
PROGRAMMING PROCEDURE .................................................................................................73
INVERTER SETTINGS................................................................................................................74
TABLE OF CONTENTS
Service Manual for Speed Oven Model DSO 500
6
INTRODUCTION
Figure 1
1012 63 4
512 10
7
8 911 4
7
MAIN FEATURES
The main features of the Model DSO 500 Speed
Oven are identied in Figure 1 and described
below.
1. ON/OFF SWITCH
Turning ON the power switch will operate the
blower fans, stirrer motor and cooling system. It
will also activate the control panel and heat up
the oven to the temperature setting, which will
display “Oven Ready.
NOTE: When the Power Switch is turned “OFF”,
the rear mounted Cooling Fans will be
running until the unit has cooled down or
the power cord removed.
2. CONTROL PANEL
This is the electronic control board that is
programmable for different menus, temperature
setting, variable fan speed, Microwave Power
Connection only, Microwave and Convection
Combination, etc. This also has some service
diagnostics.
3. DRAIN PAN
This serves as the collector of any liquid from the
Oven cavity during cooking or cleaning.
4. OVEN CAVITY
The oven cavity is constructed from stainless
steel and must be kept clean. (See CARE and
CLEANING instructions in the OPERATOR’S
MANUAL). The top cavity has a thin jet plate and
the bottom cavity has the wire rack and bottom
jet plate. A drain plug is also provided for ease
of cleaning.
5. CONVECTION FAN
The unit has two blower systems (Top and
Bottom) for distributing the patented impingement
air system. Both blower systems can be oper-
ated independently over the entire speed range
for more precise control of cooking, browning,
etc. The perforated rear panel and the bottom
jet plates must be kept clean and free of debris.
(See CARE and CLEANING instructions in the
OPERATOR’S MANUAL).
6. DOOR AND HEAT SHIELD
The door is pulled downwards and towards you
to open. The door is designed with interlocks for
microwave safety. The door should NOT be used
to support heavy dishes. It must be kept clean.
The door includes a heat shield attached to the
front.(See CARE and CLEANING instructions in
the OPERATOR’S MANUAL).
7. DOOR SEAL
These ensure a seal around the door cavity. They
should be kept clean and checked regularly for
signs of damage.
8. REMOVABLE BOTTOM JET PLATE
The bottom jet plate directs the air from the
bottom of the oven to the underside of the
product.
9. DRAIN OUTLET AND PLUG
Remove drain plug when cleaning. (See CARE
and CLEANING instructions in the OPERATOR’S
MANUAL). Make sure it is replaced into position
before replacing bottom jet plate.
10. AIR OUTLETS
These air outlets and louvers on the left side,
right side and rear panels are part of the cooling
system of the electrical components. They must
be kept free from obstruction. It will not allow
microwave energy to escape into the environ-
ment. See clearance allowances specied in the
INSTALLATION Section of this manual.
11. EXHAUST VENT
The exhaust vent is at the rear of the oven. This
enables steam to escape and prevents build up of
condensation. It will not allow microwave energy
to escape into the environment.
12. COOLING FANS
Cooling Fans above the power cord are mount-
ed to bring in cool air from the room into the
machinery compartment. The single fan below
the exhaust vent is directed to blow out the air
from the machinery compartment.
EQUIPMENT OVERVIEW
Service Manual for Speed Oven Model DSO 500
8
UNPACKING OVEN
• Inspect oven for damage such as dents
in door or inside oven cavity.
• Report any dents or breakage to source
of purchase immediately. Do not attempt
to use oven if damaged.
• Remove all materials from oven interior.
• If oven has been stored in extremely cold
area, wait a few hours before connecting
power.
RADIO INTERFERENCE
Microwave operation may cause interference
to radio, television, or similar oven. Reduce or
eliminate interference by doing the following:
• Clean door and sealing surfaces of oven
according to instructions in Care and
Cleaning instruction in the OPERATORS
MANUAL
• Place radio, television, etc. as far as pos-
sible from oven
• Use a properly installed antenna on radio,
television, etc. to obtain stronger signal
reception
OVEN PLACEMENT
• Do not install oven next to or above source
of heat, such as pizza oven or deep fat
fryer. This could cause microwave oven
to operate improperly and could shorten
life of electrical parts
• Install oven on level countertop surface
• If provided, place warning label in a
conspicuous place close to microwave
oven
• Outlet should be located so that plug is
accessible when oven is in place
• Provide clearance as shown in Figure 2
and described in the following paragraphs
“A” and “B”
A. Allow at least 3” (7.62 cm) of clearance
around the sides of oven. Proper airow
around the oven cools electrical compo-
nents. With restricted airow, the oven
may not operate properly and the life of
electrical parts is reduced.
B. Install oven so oven bottom is at least 3
feet (91.5 cm) above oor.
Figure 2. Oven Clearance Dimensions
ELECTRICAL INFORMATION
The switching operation of this microwave oven
can cause voltage uctuations on the supply
line. The operation of this oven under unfavor-
able voltage supply conditions can have adverse
effects. This device is intended for the connec-
tion to a power supply system with maximum
permissible system impedance Zmax of 1.1 Ohm
at the interface point of the user’s supply. The
user has to ensure that this device is connected
only to a power supply system, which fullls the
requirement above, If necessary, the user can ask
the public power supply company for the system
impedance at the interface point. The circuit
breakers used in this oven are Type C.
INSTALLATION
9
WARNING
TO AVOID RISK OF ELECTRICAL SHOCK OR
DEATH, THIS OVEN MUST BE GROUNDED
AND PLUG MUST NOT BE ALTERED.
WARNING
IMPROPER USE OF THE GROUNDING CAN
RESULT IN RISK OF ELECTRICAL SHOCK.”
CONSULT A QUALIFIED ELECTRICIAN
OR SERVICEMAN. IF THE GROUNDING
INSTRUCTIONS ARE NOT COMPLETELY
UNDERSTOOD, OR IF DOUBT EXISTS AS
TO WHETHER THE APPLIANCE IS PROP-
ERLY GROUNDED, AND “DO NOT USE AN
EXTENSION CORD. IF THE POWER SUPPLY
CORD IS TOO SHORT, HAVE A QUALIFIED
ELECTRICIAN OR SERVICEMAN INSTALL
AN OUTLET NEAR THE APPLIANCE.
EARTHING INSTRUCTIONS
WARNING
OVEN MUST BE GROUNDED.
Grounding reduces risk of electric shock by
providing an escape wire for the electric current if
an electrical short occurs. This oven is equipped
with a cord having a grounding wire with a
grounding plug. The plug must be plugged into
an outlet that is properly installed and grounded.
Consult a qualied electrician or service pro-
vider if grounding instructions are not completely
understood, or if doubt exists as to whether the
oven is properly grounded.
CAUTION: Do not use an extension cord.
If the product power cord is too short, have a
qualied electrician install a three-slot receptacle.
This oven should be plugged into a separate
circuit with the electrical rating as provided in
product specifications (available on Duke’s
Wavelink website).
EXTERNAL EQUIPOTENTIAL
Earthing Terminal (export only)
Equipment has secondary earthing terminal.
Terminal provides external earthing connec-
tion used in addition to earthing prong on plug.
Located on outside of oven back, terminal is
marked with this symbol.
WARNING
DO NOT REMOVE EARTHING PRONG
WHEN INSTALLING EARTHED APPLIANCE
IN A LOCATION THAT DOES NOT HAVE
THREE WIRE EARTHING RECEPTACLE,
UNDER NO CONDITION IS EARTHING
PRONG TO BE CUT OFF OR REMOVED. IT IS
THE PERSONAL RESPONSIBILITY OF THE
EQUIPMENT OWNER TO CONTACT A QUAL-
IFIED ELECTRICIAN AND HAVE PROPERLY
EARTHED THREE PRONG WALL RECEP-
TACLE INSTALLED IN ACCORDANCE WITH
APPROPRIATE ELECTRICAL CODES.
Wire Color Code
The standard accepted color coding for earthing
wires is Green or green with a yellow strip.
WARNING
EARTHING LEADS ARE NOT INTENDED TO
CARRY CURRENT IN NORMAL OPERATION.
The service technician must replace all earths
prior to completion of the service call. Under no
condition should earth wire be left off causing
a potential hazard to service technicians and
consumer.
EQUIPMENT OVERVIEW
Service Manual for Speed Oven Model DSO 500
10
Table 2. Specications
MODEL NO. DSO 500
INPUT POWER
Operating Voltage 208 – 240 VAC, 60 Hz
Current 29 Amps
Phase Single
Circuit Breaker 30A, Type C or D
OUTPUT POWER
Microwave 1600 Watts
Heaters 5400 Watts
DIMENSIONS
Height 26 in. (with 4 in. legs)
Width 25 7/8 in.
Depth 31 in. (incl. door handle)
WEIGHT
Unpacked Approximately 250 lbs.
Packed 360 lbs.
RECOMMENDED CLEARANCES
Height None required
Width 3 inches on each side
Depth None required
INTERNAL COOKING CAVITY DIMENSIONS
Height 8 in.
Width 16 in.
Depth 14-1/2 in.
SPECIFICATIONS
Table 2 lists the specications for the Model DSO 500 Speed Oven.
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