TurboChef Technologies TurboChef User Manual

Accelerating the World of Cooking

TurboChef Service Manual

FOR THE TURBOCHEF NGC (TORNADO) OVEN

800.90

TURBO

Part Number: NGC-1007 / Revision D / September 2007

For further information call:

800.90

TURBO

+1 214.379.6000

Accelerating the World of Cooking

IMPORTANT SAFETY INFORMATION - PLEASE READ FIRST

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property

damage, injury, or death. Thoroughly read the installation, operating, and maintenance instructions

before installing or servicing this equipment.

This product employs an exposed radiant heating element in the bottom of the cavity. This element is

HOT

during operation and will remain at dangerous temperatures after the unit is switched off.

NEVER attempt to

touch the element during operation, while the oven is warm, or while the oven is cooling down.



x

DO NOT

store flammable vapors or liquids (such as gasoline) in the vicinity of this or any other appliance.

The information contained in this manual is important for the proper installation, use, and maintenance of
this oven. Adherence to these procedures and instructions will result in satisfactory baking results and help
prevent maintenance. Please read this manual carefully and retain it for future reference.

Errors - descriptive, typographic, or pictorial - are subject to correction. Specifications are subject to change
without notice.

Important Safety Instructions i
General Safety Information i
Reducing Fire Risk i
Precautions to be Observed Before and During Servicing to Avoid Possible
Exposure to Excessive Microwave Energy ii
Grounding Instructions ii
Power Cord Replacement ii
RF Interference Considerations ii

Chapter 1: Installation, Specifications and Maintenance

Specs and Dimensions 1

Dimensions 1
Construction 1
Standard Features 1
Certifications 1
Packaging 1

Power Supply (Domestic and Intl Electrical Specifications) 1-2
Power Input 2
Delivery and Product Placement 2

Lifting and Placing the Oven 2

Built-In Installation 2

Installation Near Open Heat Source 3

Oven Restraint Kit 4
Setup and Initial Operation 4

Setup 4

Stacking 4

Programming 4

Initial Power-Up 4
Maintenance 5

Chapter 2: Theory of Operation

Theory of Operation 7
Glossary of Common Operating Terms 8

Chapter 3: Fault Codes

To View Fault Codes 11
Fault Code Definitions 11
Fault Code Table 12

Chapter 4: The Control System

Control System Schematic 13
Control System Component Descriptions 14
Test Mode 14
Test Function Options 15
Status Indicators 16

Table of Contents

Oven Options 18
User Configurable Options - Enable/Disable Codes 19
User Configurable Options - Access Codes 19
Control System Panel Parts 20
Control System Troubleshooting 21

Chapter 5: The Microwave System

Voltage Doubler Circuit Description 25
Monitor Circuit Description 25
Voltage Doubler Theory of Operation 26
Microwave System Parts 26
Microwave System Components 28
Wave Guide Cover Replacement 29
Wave Guide/Wave Guide Cover Parts 30
Wave Guide Replacement 30
High Voltage and Filament Transformer Replacement 30

Wiring the High Voltage Transformers 30

Wiring the Filament Transformers 31
Measuring RF Leakage for Microwave Safety 31
How to Test Microwave Components 32

Testing the High Voltage Diode 32

How to Check a Diode 32

How to Check a Capacitor 33

How to Check a Magnetron for Open/Shorted Filament 33

How to Check a High Voltage Transformer or Filament Transformer 33
High Voltage and Filament Transformer Resistance Table 33
Microwave System Troubleshooting 34

Chapter 6: The Oven Door

Removing/Reinstalling the Oven Door 37
Oven Door Parts 37
Adjusting the Oven Door 38
Preparing the Oven for Switch Adjustment 38

Oven Burn-In Procedure 38
Adjusting the Primary and Secondary Interlock Switches - Old Switch Setup 38
Primary and Secondary Interlock Switch Adjustments and Parts 39
Door Switch Assembly and Parts 40
Adjusting the Monitor Safety Switch - Old Switch Setup 40
Monitor Safety Switch Parts 40
Adjusting the Primary Interlock Switch - New Switch Setup 42
Primary Switch Adjustment and Parts 42
Adjusting the Secondary and Monitor Interlock Switches - New Switch Setup 43
Secondary and Monitor Safety Switch Parts 43
Oven Door Assembly 44
Oven Door Parts 44
Screw Torque Chart 45
Interlock Switch Troubleshooting 46

Chapter 7: The Convection Circuit

Convection Circuit Components 47
Convection Circuit/Blower Motor Parts 48
Convection Circuit Troubleshooting 49
Motor Winding Resistances Table 50

Chapter 8: IR Element and Catalytic Converter

Components 51
IR Element and Catalyst Removal 51

Removing the IR Element 51

Removing & Installing the Catalytic Converter 52

Installing a New IR Element 52
IR Element and Catalytic Converter Parts 52

Chapter 9: Schematics and Schematic Components

Schematic Parts 53

Line Voltage Components 53

Low Voltage Components 53

Wire Harness Replacement P/N’s 53
I/O Control Board Item Identification and Test Point Locations 53
Schematic - I/O Board 54
Oven Schematics 55 - 63

Chapter 10: Service Parts and Illustrations

Figure 7: NGC (Tornado) Control System 65
Figure 17: Control System Panel Enclosure and Parts 66
Figure 18: Monitor Circuit - Shown in Failsafe State 67
Figure 20: Microwave System Parts 67
Figure 21: Microwave System Parts 68
Figure 22: Wave Guide Cover/Wave Guide Removal and Replacement 68
Figure 24 & 25: High Voltage Diode and Magnetron 69
Figure 26: Oven Door Removal and Parts 69
Figure 29: Primary and Secondary Adjustment and Parts - Old Switch Setup 70
Figure 30: Door Switch Assembly and Parts 70
Figure 31: Motor Switch Adjustment and Assembly - Old Switch Setup 71
Figure 32: Primary Interlock Adjustment and Parts - New Switch Setup 71
Figure 33 & 34: Secondary and Monitor Adj. and Assy. - New Switch Setup 72
Figure 35: Oven Door Assembly 73
Figure 37: Convection Circuit Block Diagram 74
Figure 38: Convection Circuit Assembly and Parts 75
Figure 39: IR Element and Catalytic Converter Parts and Assembly 76
Figure 46: Covers and Miscellaneous Parts - Non-SBK Ovens 77
Figure 47: Covers and Miscellaneous Parts - SBK Ovens 78

Chapter 11: Comprehensive Part List

Comprehensive Part List 79

i

INTRODUCTION

IMPORTANT SAFETY INSTRUCTIONS

Strictly adhere to the following safety precautions to reduce the risk of:



Burns



Electric shock



Fire



Injury



Damage to oven or property near oven



Exposure to excessive microwave energy

GENERAL SAFETY INFORMATION



Read all instructions before using the appliance.



Install or locate this appliance only in accordance with the provided installation instructions.



Some products such as whole eggs and sealed containers (e.g., closed glass jars) may explode and should not be
heated in this oven.



Use this appliance only for its intended use as described in this manual.



This appliance should be serviced only by qualified service personnel. Contact the nearest authorized service
facility for examination, repair, or adjustment.



Keep cord away from heated surfaces.



x

DO NOT

allow children to use this appliance.



x

DO NOT use corrosive chemicals or vapors in this appliance - it is not designed for industrial or laboratory use.



x

DO NOT operate this appliance if it has a damaged cord or plug, is not working properly, or has been damaged

or dropped. See

POWER CORD REPLACEMENT

, page ii.



x

DO NOT cover or block any openings on the appliance.



x

DO NOT store this appliance outdoors.



x

DO NOT

use this product near water (e.g., near a kitchen sink, in a wet basement, near a swimming pool).



x

DO NOT immerse cord or plug in water.



x

DO NOT let cord hang over the edge of table or counter.



x

DO NOT use a water jet for cleaning. See the maintenance section of this manual on page 5 for proper cleaning

procedures.

REDUCING FIRE RISK



Remove wire twist-ties from paper or plastic bags used to facilitate cooking in the oven.



If materials inside the oven ignite,

- Keep oven door closed

- Turn oven off

- Disconnect the power cord or shut off power at the fuse or circuit breaker panel



If smoke is observed, switch off or unplug the oven. Keep the door closed to stifle any flames.



x

DO NOT

use the cook cavity for storage purposes.



x

DO NOT

overcook food. Carefully attend the oven if paper, plastic, or other combustible materials are placed

inside the oven to facilitate cooking.



x

DO NOT leave paper products, cooking utensils, or food in the cavity when not in use.

SAVE THESE INSTRUCTIONS

ii

INTRODUCTION

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.

GROUNDING INSTRUCTIONS

This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This oven is equipped with a cord that
has a grounding wire with a grounding plug, which must be plugged into an outlet that is properly installed
and grounded. Consult a qualified electrician or serviceman if uncertain about the ability to follow ground­ing instructions or if doubt exists as to whether the appliance is properly grounded.



x

DO NOT use an extension cord. If the power cord is too short, have a qualified electrician or service-

man install an outlet near the appliance.

WARNING: Improper grounding can result in risk of electric shock.

POWER CORD REPLACEMENT

If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or a similarly quali­fied person.

RF INTERFERENCE CONSIDERATIONS

The NGC (Tornado) oven generates radio frequency signals. This device has been tested and was determined
to be in compliance with applicable portions of FCC part 18 requirements and to the protection require­ments of Council Directive 89/336/EEC on the approximation of the laws of the Member States relating
to electromagnetic compatibility at the time of manufacture. However, some equipment with sensitivity to
signals below these limits may experience interference.

If your equipment experiences interference:



Increase the physical separation between this oven and the sensitive equipment.



If the sensitive device can be grounded, do so following accepted grounding practices.



If battery-powered microphones are being affected, ensure that the batteries are fully charged.



Keep sensitive equipment on separate electrical circuits if possible.



Route intercom wires, microphone wires, speaker cables, etc. away from the oven.

Installation, Specifications,

and Maintenance

Standard Features



Recirculating airpath with patented catalytic converter
system



Multi-speed convection blower



Independently-controlled bottom browning element



Stackable design



Smart Voltage Sensor Technology (North America only)



Factory-programmed, customizable menu settings



Smart Card for remote programming



Warranty -

1 year parts and labor

Certifications

UL, cUL, NSF, FDA, FCC, TÜV, CE

UL KNLZ Ventless Certification - This product conforms
to the ventilation recommendations set forth by NFPA96
using EPA202 test method.

Packaging

All ovens are packaged in a double-wall corrugated box
banded to a wooden skid.

Power Supply - North America

SMART VOLTAGE SENSOR TECHNOLOGY

Voltage: 208/240 VAC, 60 Hz, 1 phase
Amperage: Nameplate rating 30 Amp (3-wire

including ground)
Cordset: 10 gauge, 3 conductor, 5 foot cordset
Plug: NEMA 6-30

1

SPECS AND DIMENSIONS

Dimensions

EXTERIOR COOK CAVITY

Height 19” (483 mm) 8” (203 mm)

with legs 23” (584 mm)
Width 26” (660 mm) 15.5” (394 mm)
Depth 25.7” (653 mm) 14.7” (373 mm)

with handle 28.2” (716 mm)
Weight 190 lbs. (86 kg)

WALL CLEARANCE

Back 0” (0 mm) unless built-in (page 2)
Sides 2” (51 mm)

ENTRY CLEARANCE (minimum)

Crated 31.5” (800 mm)
Uncrated 28.7” (729 mm)

Construction

EXTERIOR



430 stainless steel front, top and sides.



4” (102 mm) adjustable legs



Cool to the touch handle

INTERIOR



304 stainless steel line



Fully insulated cooking chamber



Removable assorted cooking surfaces



Independently-controlled lower cooking element

FIGURE

1: NGC (Tornado) Dimensions

INSTALLATION, SPECIFICATIONS, AND MAINTENANCE

2

INSTALLATION, SPECIFICATIONS, AND MAINTENANCE

NOTE: The Smart Voltage Sensor Technology does

not compensate for lack of voltage or over-voltage
situations. It is the responsibility of the owner to
supply voltage to the unit according to the follow­ing specifications.

Power Supply - Europe, Asia-Pacific

NGC EW (3-phase)
Voltage: 400

VAC, 50 Hz, Wye, 5-

wire (3L + N + Ground)

Circuit Breaker: Type D, min. 20 Amps

NGC ED (3-phase)
Universal Voltage: 230

VAC, 50 Hz, Delta, 4-

wire (3L + Ground)

Circuit Breaker: Type D, min. 30 Amps

NGC UK (1-phase)
Voltage: 230

VAC, 50 Hz, 3-wire

(2L + Ground)

Circuit Breaker: Type D, min. 30 Amps

Power Supply - Latin America

NGC BK (1-phase)
Voltage: 220

VAC, 60 Hz, 3-wire

(2L + Ground)

Circuit Breaker: Type D, min. 30 Amps

Power Supply - Japan

NGC JD (3-phase)
Voltage: 200

VAC, 50/60 Hz, Delta,

4-wire (3L + Ground)

Circuit Breaker: Type D, min. 30 Amps

NGC JK (1-phase)
Voltage: 200

VAC, 50/60 Hz, 3-wire

(2L + Ground)

Circuit Breaker: Type D, min. 30 Amps

Power Supply - South Korea

NGC KW (3-phase)
Voltage: 400

VAC, 60 Hz, Wye, 5-

wire (3L + N + Ground)

Circuit Breaker: Type D, min. 20 Amps

POWER INPUT

Heaters Input Power (NA) 5990/6675 watts
Heaters Input Power (Intl) 6300 watts
Microwave Input Power 3500 watts*

*Maximum Independent Input Power

DELIVERY AND PRODUCT PLACEMENT

Remove oven from carton. Immediately note any
damage and contact shipping company within 24
hours in order to file a claim. TurboChef is not
responsible if the product is damaged in shipment.
Remove all literature and accessories from the carton.

NOTE: Thoroughly check the carton before discarding.

WARNING

: Oven weight is approx. 190 lbs.
(86 kg) Two or more persons are required to
lift it.

Lifting and Placing the Oven

Position one or more persons on either side of the
oven and lift from the bottom. Never lift the oven
from the front and rear. Place the oven on a counter­top surface at least 28” (711 mm) deep and capable of
supporting 200 lbs (91 kg).

Once properly positioned on the counter, plug the
oven into wall-mounted electrical receptacle. See
page ii for grounding instructions.

WARNING

: Never lift the oven by its door
handle. Physical damage to the oven and/or

personal injury may result. The operator must ensure
that the oven is properly placed on the countertop at
all times. TurboChef will not recognize a fallen oven
as a warrantable claim and is not liable for any injuries
that may result.

Built-In Installation (Figure 2)

TurboChef ovens are designed to be installed on a
countertop or table. They are not intended for built­in or enclosed installation.

“Built-in or enclosed installation” is defined as
installing an oven in any structure that surrounds the
oven by five sides (i.e., top/rear/side panels and base).

If installation must be “built in,” the operator must
ensure the following:



Minimum of 300 cfm (8.5 cmm) of supplement flow
within the cabinet.



Minimum clearances of 2" (51 mm) to every surface.

In addition, the operator will be responsible for com­pensating any extra time required to service the prod­uct due to removing the product for serviceability.

Installation Near Open Heat Source (Figure 3)

When placing a TurboChef oven near an open heat
source, strictly adhere to the following:



Verify oven location has a minimum 6" (152 mm)
clearance on top and minimum 2" (51 mm) of
clearance on each side.



If the oven is being placed near a grill or stove,
there must be a divider between the oven and the
open heat source, with a minimum of 6" (152 mm)
between the oven and the divider.



If the oven is being placed near a fryer, there must
be a divider between the oven and fryer, with a
minimum of 12" (305 mm) between the oven and
the divider.



The height of the divider must be greater than or
equal to the height of the oven (23"/584 mm).

FIGURE 2: Built-in Installation Specs

FIGURE 3: Open Heat Source Installation Specs

INSTALLATION, SPECIFICATIONS, AND MAINTENANCE

3

(102 mm)

4

Oven Restraint Kit (TC3-0242 KIT)

The Oven Restraint Kit is an optional system that
helps prevent the oven from moving forward during
use and/or cleaning. It will not prevent the oven from
falling off a countertop if the legs are allowed to slide
off the edge or if the oven is intentionally or forcefully
pulled off.

Proper installation instructions are included with the
kit. for additional information, please call customer
service at

800.90

TURBO / +1 214.379.6000.

SETUP AND INITIAL OPERATION

Setup

Once the oven is properly positioned on the counter,
remove any packing material and/or any foreign
objects from within the cavity. Install the oven rack/
cooking surface.

Stacking

1. Ensure the surface that will hold the stacked
ovens can support at least 400 lbs (181 kg).

2. Allow ovens adequate time to cool and unplug them

3. If you are stacking ovens on a TurboChef oven
cart (24” = NGC-1217-1, 18” = NGC-1217-2),
make sure that the bottom oven is bolted to the cart
and the wheels are locked.

4. Attach the stacking bracket (P/N TC3-0323) to the
back of the bottom oven:
a. Remove the two screws that hold the top

panel to the back of the oven (see bottom
arrows on Figure 4).

b. Align the holes on the stacking bracket with

the holes on the oven and reinstall the screws.

5. Remove the legs of the oven that will be placed on
top. This requires two or more persons - at least
one person to lift and one to unscrew the legs.

6. Remove the screws from the oven that will be
placed on top (see top arrows on Figure 4).

7. Place this oven on top of the other (the one to which
the stacking bracket is attached).

WARNING

: Do not attempt to lift the oven

with fewer than 2 people.

WARNING: Do not lift oven from front and back.

FIGURE 4: Properly Stacked NGC Ovens

INSTALLATION, SPECIFICATIONS, AND MAINTENANCE

8. Align the holes on the bracket with the holes
on the top oven and reinstall the screws.

WARNING: Do not stack ovens over two-

high.

Programming

The oven is preprogrammed and ready to oper­ate out of the box.

Initial Power-up

To turn on the oven, press the bottom-right soft
key next to the words

OVEN ON

on the display.
The oven will begin to warm up to its prede­fined cooking temperature. This takes approxi­mately 13 minutes.

When the warm-up cycle is completed, the oven
will beep and display the

READY TO COOK.

INSTALLATION, SPECIFICATIONS, AND MAINTENANCE

5

DAILY MAINTENANCE FOR THE NGC

Before cleaning, check with the store for custom
cleaning instructions.

When cleaning the oven, use only TurboChef Oven
Cleaner. Any other cleaning products can damage

critical parts and may void warranty on those parts.

Supplies and Equipment

TurboChef Oven Cleaner (P/N 103180 USA,
103380 Intl), Oven Guard (P/N 103181 USA,
103381 Intl), nylon scrub pad, cleaning towel

Step 1: Prepare the Oven



Turn oven off by pressing the BACK key.



The oven will display OVEN OFF/COOLING DOWN.



x

DO NOT attempt to clean oven during the cool

down cycle. Cooling takes appx. 90 minutes.

WARNING: The oven operates at appx. 500

º

F
(260ºC) and may cause injury if not allowed
time to cool properly.

Step 2: Remove the Lower Access Panel



Wipe out any crumbs that have collected.

Step 3: Remove and Clean the Cooking Surface



If rack, wash, rinse, and sanitize.



If baking stone, gently dry-scrub with nylon pad.
If the stone gets wet, let it thoroughly air-dry.

Step 4: Lift Bottom Element



Be sure the bottom element is cool prior to lifting.

WARNING: The bottom element operates at

appx. 1000ºF (537ºC).

Step 5: Remove Particles and Spray Oven Interior
with TurboChef

®

Oven Cleaner



Using a damp towel, remove large food particles.



If stubborn stain is present, sparingly spray
TurboChef Oven Cleaner onto the stain.



Allow cleaner to penetrate for five (5) minutes.



x

DO NOT saturate the bottom of the oven with

water or oven cleaner.

Step 6: Clean Oven Interior



Using a nylon scrub pad, clean the oven door
and cook cavity.

CAUTION: DO NOT apply pressure to the

wave guide covers. Breaking will result in a

non-warranty service call.

Step 7: Wipe Out Oven Interior



Wipe oven door, bottom element, and cook
cavity using a damp towel.

Step 8: Clean Lower Access Panel Area



x

DO NOT spray any chemical in this area.

Step 9: Lower the Bottom Element and Reinstall the
Cooking Surface and Lower Access Panel

Step 10: Apply Oven Guard and Clean Oven Exterior



Spray Oven Guard on towel. Wipe sides of cook
cavity and inside of door.



x

DO NOT

spray Oven Guard directly into cook

cavity or wipe on nozzle plates/bottom element.



Wipe the oven exterior with a clean, damp towel.



Oven is ready to turn on.

10

9

876

1 2 3 4 5

Theory of Operation

THEORY OF OPERATION

7

THEORY OF OPERATION

The TurboChef NGC (Tornado) oven utilizes
three independent heat transfer mechanisms to
rapidly cook food.

The systems are as follows:



Convection



Infrared energy



Microwave energy

By combining these mechanisms along with the
ability to control each mechanism independently,
the NGC (Tornado) oven is able to reduce the cook
time of most foods by 70-90 percent.

Figure 5 below represents the oven’s different sys­tems and the critical components of each system.

Should a problem arise with any of the compo­nents listed below, please turn to the appropriate
section within this manual for further instructions.

For the purpose of this manual, each independent
heat transfer mechanism is individually identified.
For instance, if an oven is experiencing difficulties
browning the food, focus on

CONVECTION SYSTEM

and/or BOTTOM IR AND CCV. Focus on MICROWAVE

SYSTEM

if the oven is browning the food but not

heating the inside.

Part numbers are included on illustrations (where
applicable) and in the back of this manual. If an
item is not illustrated, the part number is provided
in the text.

Chapter 4

CONTROL SYSTEM

I/O Control Board
Keypad
Display
Mechanical Relays
Solid State Relay

Chapter 5

MICROWAVE SYSTEM

Magnetrons
High Voltage Transformers
Filament Transformers
High Voltage Capacitors
High Voltage Diodes
Fuses

Chapter 7

CONVECTION SYSTEM

Convection Heater
Blower Controller
Blower Motor
Hi-Limit Thermostat

Chapter 8

BOTTOM IR AND CCV

Bottom Infrared Element
Catalytic Converter

FIGURE 5: NGC (Tornado) Systems and Critical Components

THEORY OF OPERATION

8

GLOSSARY OF COMMON OPERATING TERMS

Off State

All the oven’s control systems are off and the cook cavity temperature is below 150ºF (66ºC).

Cool Down

A subset of the

OFF STATE. During COOL DOWN

, the oven will circulate the main convection blower until

the cook cavity temperature is below 150ºF (66ºC).

Ready State

The oven has successfully warmed to the predefined set temperature. At this point the oven control is
ready to receive cook commands via the keypad. The oven will maintain the set temperature in the

READY STATE.

Set Temperature, Cook Cavity (CCSP)

Predefined temperature of the cook cavity at which the oven cooks.

Set Temperature, IR Element (IRSP and IRSI)

IRSP is the set temperature of the IR element during a given cook cycle. Settings are determined on a
per-recipe basis. IRSI is the set temperature of the IR element during the READY STATE (or “idle”). IRSI
setting can be adjusted in the

TEST MODE (page 16).

Actual Temperature, Cook Cavity (TCC)

The actual temperature registered by the cook cavity thermocouple.

Actual Temperature, IR Element (TIR)

The actual temperature registered by the IR element.

Edit Mode

Enables the user to change recipe and CCSP/IRSP temperature settings.

Warm-Up

The mode in which the oven warms itself to the set temperature.

Soak

The mode in which the oven temperature has reached the CCSP, and remains in warmup for an addi­tional 8 minutes to allow cook cavity surfaces to warm. The oven will proceed to soak only if warm-up
was initiated when TCC < (CCSP - 126ºF) or TCC < (CCSP - 66ºC).

Cook Cycle

A period of operation as defined by a recipe.

Test Mode

A special diagnostic mode that enables the service technician to turn on and off all oven systems
independent of one another, check oven statistics, and set the IRSI.

THEORY OF OPERATION

9

Keypad

The primary interface for the operator.

Display

Displays all visual information to the operator.

Self-Test (STEST)

A special diagnostic function that tests all critical subsystems to determine their operational state.

Recipe

A set of user-defined Events that determine a cook cycle.

Events

A single operational element that is a part of a recipe. Each recipe may have up to six events depending on
programming. Each event can be set between 0 and 100% of the total cook time.

Total Cook Time

The total duration of a recipe.

Percentage (%) Time

An event subset that specifies the duration of the event. The sum of all event time percentages for a recipe
must equal 100%.

Percentage (%) Air

An event subset that specifies the relative amount of impingement airflow (speed of convection motor) dur­ing an event. Valid between 10 and 100%.

NOTE: Maximum 100% = 7100 RPM blower motor speed. Blower motor speed scale is linear.

Percentage (%) Microwave (WAV)

An event subset specifying the microwave cycle during the event. Valid between 0 and 100%. For example,
if WAV is set to 30%, then microwave would be present in the cook cycle for 3 out of every 10 seconds.

Fault Code

A code assigned to an instance that the control considers to be a failure. Upon discovering a fault, the
control will display the fault code and a brief description of the failure. The oven will also log faults F1
through F6 in the Fault Log. See page 11 for more detail on faults and for viewing the fault log.

Fault Codes

11

The NGC (Tornado) oven has the ability to continually

monitor and log various fault conditions. Some fault
conditions will terminate cook cycles, while others
will not. Please refer to the fault code table on
page 12 for more detailed information.

When a fault is detected, the Fault Log will incre­ment. However, if the fault is subsequently cleared
by some action, whether service related or not, the
Fault Log will not decrement.

TO VIEW FAULT CODES

To view the Fault Log, simultaneously press the “4”
and “6” keys while the oven is in the

OFF STATE.

The oven will display all faults logged. Figure 6.

Each fault will log up 255 instances before rolling
back to zero. To zero the log, see pages 14-15
(

TEST MODE).

NOTE: The Fault Log also displays cook counts,

which will log up to 65,535 cook cycles. In order
for the control to log a cook cycle, the oven must
complete the first event of any given recipe. If a
recipe has only one event, the oven must complete
the entire cook cycle in order to count it.

FAULT CODE DEFINITIONS

F1: Blower Running Status Bad

Fault is displayed when the motor controller
indicates no running status.

The motor and motor controller are monitored con­tinuously in all modes with special handling in

SELF

TEST

and TEST MODE. If a fault is detected, the con-

trol will terminate a cook cycle and display

F1:

BLOWER. Upon turning on the oven, the control will

attempt to restart the motor. If the restart is suc­cessful, the fault code will be cleared. The fault is
also cleared from the display at the onset of cooking
or when the blower motor is tested in

TEST MODE.

F2: Cook Temperature Low

Fault is displayed if the cook cavity temperature is
more than 84ºF (47ºC) below the set temperature
after five (5) seconds into a cook cycle.

The fault is cleared from the display at the onset of
cooking if the cook cavity temperature is within
84ºF (47ºC) of the set temperature or when the
heater is tested in the

TEST MODE.

F3: Magnetron Current Low

Fault is displayed when the current transformer
(CT) on the I/O control board does not detect
enough current. The fault is monitored when the
microwave is on during a cook cycle or self-test.

The fault is cleared from the display at the onset of
a cook cycle if the CT detects current or when the
magnetron is successfully energized in

TEST MODE.

F4: Door Monitor Defective

Fault is displayed when the control detects that the
monitor interlock switch unlatches before the pri­mary or secondary interlock switches.

In addition, this fault will blow the F3 fuse if the
microwave high voltage system is energized when
the fault occurs. The fault is cleared from the display
when the oven is powered off and then back on.

COOK COUNT
F1 BLOWER

F2 LOW TEMP
F3 MAG CURR
F4 MONITOR
F5 MAG TEMP
F6 TEMP

S/N XXXXXX

NGCVXXXX XXXXXX

0
0
0
0
0
0
0

FIGURE

6: Fault Log

FAULT CODES

FAULT CODES

12

NOTE: Door interlock switches are in parallel. See

OVEN SCHEMATICS

, pages 55-63. The fault is moni-

tored during a cook cycle, or in

SELF TEST when the

microwave is on.

F5: Magnetron Over Temperature

Fault is displayed when either magnetron thermo­stat is “open.”

The fault is cleared from the display at the onset of
a cook cycle if the thermostat is closed or when the
magnetron is successfully tested in

TEST MODE.

F6: EC (Electrical Compartment) Temperature High

Fault is displayed when the EC thermocouple
exceeds 158ºF (70ºC). It is monitored once per
minute.

The fault is cleared from the display when the EC

thermocouple temperature is below the indicated
limit.

F7: Thermocouple Open

Fault does not log in counter. Fault is displayed
when the control detects that either the IR or CC
thermocouple is “open.”



999ºF/C indicates CC thermocouple is “open.”



1999ºF/C indicates IR thermocouple is “open.”

Fault is cleared when the control detects continuity
on the open thermocouple circuit.

F8: Heat Low

Fault is not logged in counter. Displays during

WARM UP

or SELF TEST

if the cook cavity tempera­ture (TCC) fails to rise at least 14ºF (7ºC) within a
given thirty (30) seconds.

FAULT CODE AND DESCRIPTION WHEN ACTIVE REFER TO

F1: Blower Running Status Bad

F2: Cook Temperature Low

F3: Magnetron Current Low

F4: Door Monitor Defective

F5: Magnetron Over Temperature

F6: EC Temperature High

F7: Thermocouple Open

F8: Heat Low

FAULT CODE TABLE

Fault codes are listed in order of hierarchy. For example, if during cooking the oven experiences an F1
and F2 fault, the oven will report only the F1 fault because the software will halt all actions upon discov­ering the F1 fault. F7 and F8 faults are displayed on the primary screen and are not displayed or counted
in the Fault Log.

NOTE: All Fault codes listed in bold will terminate a cook cycle upon discovery. Any fault occurring in

a cook cycle will be logged in the Fault Log.

Warm - up

X

X

X

X

Idle Mode

X

X

X

Cook Mode

X

X

X

X

X

X

X

Self-Test

X

X

X

X

X

Page 22

Page 23

Page 34

Page 46

Page 28

Page 14

Page 21

Page 22, 49

The Control System

THE CONTROL SYSTEM

The Control System is comprised of the components

that signal, sense, command, and switch the oven’s
various components. Figure 7 shows a functional
diagram of all the components that make up the
Control System.

NOTE: The part numbers for each component can

be located on the drawings found throughout and
at the end of this manual.

GROUND

STATUS OK

I/O COM

1

2

OUT

240 VAC
3 PHASE

3

4

4

6

5

2

1

3

I/O COM
ENABLE

200-240
VAC IN

SPD

2
3

0-10V

1

BMSC

K1

MECH
RELAY

+ 24 VDC -

RELAY

MECH

K2

RELAY

MECH

K3

SSR

DUAL

BOARD

CONTROL

I/O

KEYPAD

VFD

DISPLAY

IR THERMOCOUPLE

EC THERMOCOUPLE

CC THERMOCOUPLE

SUPPLY

POWER

24VDC

IR ELEMENT COMMAND
CONVECTION HEATER COMMAND

MAG HV

COMMAND

COMMAND

MAG FILAMENT

MONITOR
INTERLOCK

INTERLOCK

INTERLOCK

+24VDC

+24VDC

+24VDC

COMMON

CMD

COMMON

+24VDC

PRIMARY SWITCH

SECONDARY SWITCH

K6

MECH
RELAY

+ 24 VDC - + 24 VDC - + 24 VDC -

VOLTAGE

COMMAND

COMMON

VOLTAGE INPUT

VOLTAGE

K7

RELAY

- 24 VDC +

MAGNETRON COOLING FAN COMMAND

PRIMARY SWITCH

NC
NO

C

NC

C

NO

SECONDARY SWITCH

MONITOR SWITCH

NC

C

NO

3(+) 4(-)

3(+) 4(-)

+V

-V

L

N

A (-)
C (+)

C (+)

A (-)

C (+)

A (-)

12

14
14

2

1

14

21

14

2

1

12

25 26

2

1

25 26

2

1

1

2

25 26

25 26

+24VDC

K5

K4

(U.S. ONLY)

FOR MORE DETAI L, SEE FIGURE 37

SENSOR

FIGURE 7: NGC (Tornado) Control System

13

U.S. ONLY

THE CONTROL SYSTEM

14

CONTROL SYSTEM COMPONENT DESCRIPTIONS

24 VDC Power Supply

24 VDC output at 40 watts. Supplies control
voltage for I/O control board, 24 VDC mechanical
relays, and solid state relays.

K1 Mechanical Relay

240 VAC, 30 Amp, Double Pole, Double Throw, 24
VDC Relay Coil. Switches power to the magnetron

filament transformers.

K2 Mechanical Relay

240 VAC, 30 Amp, Double Pole, Double Throw, 24
VDC Relay Coil. Switches power to the magnetron

high voltage transformers.

K3 Mechanical Relay

240 VAC, 30 Amp, Double Pole, Double Throw, 24
VDC Relay Coil. Safety interlock device designed to

short L1 and L2 if the monitor switch opens before
the primary or secondary interlock switches.

K4/K5 SSR

240 VAC, Dual 40 Amp Solid State Relay. K4
(right) controls the convection heater and K5 (left)
controls the IR element.

K6 Mechanical Relay (North America Only)

240 VAC, 30 Amp, Three Pole, Double Throw, 24
VDC Relay Coil. Responsible for switching between

the 208VAC and 240VAC taps on the high volt­age and filament transformers.

K7 Relay

24 VDC, 20 Amp, Sealed. Starts with command
from I/O board; switches magnetron cooling fan on
and off. Timer for switching off mag fan is 4:15
after filament switches off.

Interlock Switches

Primary, Secondary, and Monitor Interlock Switches .
Must be actuated by the oven door. When the door
opens, the order is: P, S, M.

IR Thermocouple

Type K Thermocouple. Embedded in the IR ele­ment, the IR thermocouple measures the inter­nal/sheath temperature of the IR element. Valid IR
set points are between 500ºF (260ºC) and 1150ºF
(621ºC). The display indicates 1999ºF/C if the
thermocouple is “open”.

EC Thermocouple (P/N 700-1199)

Type K Thermocouple. Thermocouple measures the
temperature of the electrical compartment. If the
temperature within the electrical compartment is
above 158ºF (70ºC), the control displays

F6: EC

TEMP

. The control board checks the EC tempera-

ture every 60 seconds.

CC Thermocouple

Type K Thermocouple. Thermocouple measures
the temperature of the re-circulating impingement
airflow. Valid CC set points vary depending on
software. If the display indicates 999ºF/C, the ther­mocouple is “open.”

BMSC

Proprietary Brushless DC Motor Controller.
Designed solely to operate the blower motor.

VFD (Display)

Vacuum Fluorescent Display.

Keypad

5x9 Matrix Membrane Switch. Keypad is connected
to the I/O control board via 14-pin flat cable.

Voltage Sensor (North America Only)

Proprietary device designed to measure incoming
line voltage and switch between 208 and 240 VAC
operation. The device measures and allows the user
to configure the oven only when the oven is first
powered on. Voltage sensor will default at 240
VAC.

TEST MODE

The Test Mode allows the service technician to
operate the oven’s subsystems individually. It also
allows the operator to configure various presets.

THE CONTROL SYSTEM

To enter TEST MODE (Figure 8):

1. Press the

BACK key until the display is in the

OFF

STATE

.

2. Simultaneously press

BACK and ENTER keys.

3. When prompted, enter the access code: 9-4-2-8
and press

ENTER.

The

TEST MODE displays the software version, actu-

al cook chamber temperature, and actual IR element
temperature at the top of the screen. The

TEST

MODE

consists of 2 screens (Figures 9 and 10). To

display the second screen, press either the

UP or

DOWN key. To test a component or sub-system,

press the corresponding soft key.

TEST FUNCTION OPTIONS

Blower Speed (Screen 1)

The

BLOWER key increments the blower motor

speed in 10% increments. When the speed is
100%, the next press sets the speed to 0%.

NOTE: If this function is being used to expedite

cooling, open the oven door to further expedite.

Faults (Screen 1)

Pressing the FAULTS soft key will display all the
accumulated faults in the Fault Log. Press “0” to
zero the fault counter. For more information, see
page

11.

Self-Test Function (Screen 1)

The

STEST key initiates a self-test to test all major

components of the oven (including door switches).
To run the self-test, press the corresponding soft
key once. Press the

BACK key to return to the OVEN

OFF

/COOLING DOWN mode.

Heater Test (Screen 1)

Press the

HEATER key to turn the heater on. Heater

will remain on until key is pressed again to turn it
off. If the blower speed is 0, the blower speed is
set to idle airflow (10%).

Magnetron (Screen 1)

Press and hold the

MGTRON key to test the mag-

netrons. Doing so requires a 5-second warm-up
period. Once the

MGTRON key is released, the high

voltage supply is switched off to the magnetron
and the magnetron will stop radiating; however,
the power is still supplied to the magnetron cooling
fan for an extra 4 minutes, 15 seconds.

IR ELE (Screen 1)

Pressing the

IR ELE key will turn on the IR

element. When pressed, the screen will read

IR

ELEMENT ON

. Press the IR ELE key again to turn it

off.

CC 810F

TEST NGC XXXXX

IR 500

0

F

BLOWER HEATER

FAULTS MGTRON

STEST

IR ELE

PSM A

t hWi

CC 810F

TEST NGC XXXXX

IR 500

0

F

DIAG

0

ELEC

COOKS F/C

ACCUM

IR SI

PSM A

t hWi

FIGURE

9: Test Mode - Screen 1

FIGURE

10: Test Mode - Screen 2

FIGURE

8: Accessing Test Mode

15

THE CONTROL SYSTEM

16

Diagnostic Display (Screen 2)

The

DIAG key turns on or off the diagnostic display

feature. When this feature is enabled, the oven will
display temperature and cook cycle parameters when
the oven is cooking or idle.

In addition, the status indicators are displayed on the
bottom of the screen. When a status indicator is
highlighted/backlit the corresponding system is off
or open. For example:

W would indicate that the

Microwave System is off.

The

STATUS INDICATOR section below offers a more

detailed description of each indicator.

COOKS (Screen 2)

Press once to display the total number of cook counts
for all recipes. Press again to display the total amount
of time the oven has been in cook cycles.

ACCUM (Screen 2)

Press once to display the total amount of time the
magnetrons have been on. Press again to display the
total amount of time the oven has been on.

Electronic Compartment Temperature (Screen 2)

The

º

ELEC key displays the temperature inside the

electronic compartment.

F/C (Screen 2)

Changes how the oven’s temperature units are dis­played. The

F/C key alternately selects Fahrenheit or

Celsius.

IR SI (Screen 2)

Displays the idle IR set point. This temperature is a
factory setting and should never be altered. If an
incorrect temperature has been entered, consult the
factory before changing this value.

STATUS INDICATORS

See Figures 9 and 10 on page 15.
P Primary switch – closed or open
S Secondary switch – closed or open
M Monitor switch – closed or open
t Magnetron thermostats – closed or open
h Main convection heater – off or on
i IR element – off or on
A Blower motor controller – enabled or disabled
W Microwave current – Less than or greater than 7

Amps*

* Microwave (

W) status indicator is not

highlighted/backlit when the current is more
than

7 Amps.

Status indicators are displayed at the bottom of the
display screen when the oven is in

TEST MODE, or

during normal oven operation if in

DIAGNOSTIC MODE

(DIAG was turned on). Refer to Figures 9 and 10.

If a status indicator is highlighted/backlit, the item or
component is in an un-energized or off state.
Conversely, if a status indicator is not highlighted,
the component is in an energized or on state.

PROGRAMMING

Edit Mode

The

EDIT MODE enables the operator to manually alter

recipes and the cook cavity temperature

(CCSP).

To access

EDIT MODE:

1. Simultaneously press the

UP and DOWN keys.

2. When prompted, enter the access code “9” and
then press the

ENTER key.

NOTE: If this does not provide access, refer to page 19

for enable/disable codes.

Changing the Cook Chamber Temperature

This temperature is a factory setting - exercise caution
before altering it. For best results, consult the factory
before changing this value.

To change the cook cavity temperature (CCSP),
press the UP and DOWN keys. Temperature ranges
vary depending on software. Once you have selected
the correct temperature, press the

ENTER key to con-

firm and advance to the next screen

.

Altering a Recipe

Most

NGC (Tornado) oven models contain 128

unique recipes. The display shows two (2) pages each
with eight (

8) recipe groups. Each recipe group con-

tains eight (

8) recipes. See Figures 11 and 12.

To alter a recipe:

1. Enter the

EDIT MODE (see page 16).

2. Enter the access code “9” and set the CCSP. The
screen displays the first set of eight (8) recipe
groups. To access the second set of eight (8)
recipe groups, press either the

UP or DOWN key.

3. Select the recipe group that contains the individ­ual recipe you wish to alter. Select the recipe you
wish to alter by pressing the soft key correspon­ding to the recipe item. Figures 11 and 12.

4. Use the

UP and DOWN keys to navigate through

the recipe settings. Use the keypad and

ENTER key

to alter any of the following three (3) parameters
(see Figure 13):

a. Cook time

Total duration of the cook cycle. Enter the
desired time and press

ENTER.

b. IR element temperature (IRSP)

The temperature the lower radiant element
will maintain during the entire cook cycle.
Valid temperatures are between 500ºF (260ºC)
and 1150ºF (621ºC).

c. Events 1…6

Use the keypad and

ENTER key to enter values

for %

TIME, % AIR, and % WAV.



Sum of % TIME for all events must = 100.
The operating system will not allow a
combination of events not equal to 100%.



The % AIR parameter is valid between 10
and 100%.



The % WAV (microwave) parameter is valid
between 0 and 100%.

5. After making changes, test the recipe by
pressing the

TEST soft key. Once the oven has

warmed to the CC set point, press the

TEST

soft key again to begin the test cook.

6. Once satisfied with the recipe, press

SAVE to

permanently store changes.

7. Press the

BACK key until exited from EDIT MODE.

GROUP A

EDIT GROUPS

GROUP B

GROUP C

GROUP D

GROUP E

GROUP F

GROUP G

GROUP H

ITEM 1

GROUP A

ITEM 2

ITEM 3

ITEM 4

ITEM 5

ITEM 6

ITEM 7

ITEM 8

< GROUP 1 >

SAVE

TEST

ITEM 1

COUNT
COOK TIME
IR SETPT

%TIME %AIR %WAV
1 XXX
2 XXX
3 XXX
4 XXX
5 XXX
6 XXX

XXX
XXX
XXX
XXX
XXX
XXX

XXX
XXX
XXX
XXX
XXX
XXX

0
00:00
500

0

F

FIGURE 11: Select Group

FIGURE 12: Select Recipe FIGURE 1 3: Edit Recipe Settings

17

THE CONTROL SYSTEM

Loading a Menu from a Smart Card

1. Ensure the oven is in the

OVEN OFF/COOLING

DOWN

mode.

2. Enable the

LOAD MENU

function (page 19). The

oven will return to the Off screen.

3. Remove the lower access panel (Figure 14).

4. Insert smart card into oven (Figure 14).

5. Press the bottom-left soft key.

6. Select

LOAD MENU FROM CARD

. The menu on

the smart card will load to the oven.

7. When this process completes, the oven will
beep. Remove the smart card and reattach the
lower access panel.

8. If the oven is a Subway oven, disable the

LOAD

MENU

function (page 19). For all other ovens,

leave it enabled.

OVEN OPTIONS

Done Screen

To enable/disable the Done Screen (Figure 15), see
the next page. Enable the Done Screen to:



Cook an item longer after the end of a cook cycle.



Save an adjusted cook time (only if Time Screen is
also enabled).

Time Screen

To enable/disable the Time Screen (Figure 16), see
the next page. Enable the Time Screen to:



Adjust the cook time before initiating a cook cycle.



Save an adjusted cook time.

Snooze Mode

To enable/disable the Snooze Screen, see the next
page. Enabling the Snooze Screen will allow the oper­ator to set the oven in a mode during which all oven
operations are turned off, but the heaters remain on.
The cook cavity will remain at the set temperature,
and the IR temperature will drop 200ºF (104ºC)
below the IRSI. This allows fast recovery when the
oven is again turned on.

DONE

SAVE
TIME

COOK
MORE

ENTER COOK TIME

00:20

START

FIGURE 15: Done Screen

FIGURE 16: Time (Start) Screen

THE CONTROL SYSTEM

18

FIGURE 14: Inserting Smart Card

USER CONFIGURABLE OPTIONS - ENABLE/DISABLE CODES

The following codes enable and disable each function/screen listed. They do not take you to the function/screen.

After each code, press

ENTER. To enable, press 9 after entering code (except S-A-V-E, W-A-V-E). To disable, press

any key (except 9) after entering code.

Function/Screen Simultaneously Press Enter Key Code

Done Screen w/out “Save Time”

BACK & ENTER 3-6-6-3 (D-O-N-E)

Done Screen w/ “Save Time” - step 1

BACK & ENTER 3-6-6-3 (D-O-N-E)

Done Screen w/ “Save Time” - step 2

BACK & ENTER

8-4-6-3 (T-I-M-E)

Edit Recipe Mode

UP & DOWN 8-4-3-3 (T-I-D-E)

Load Menu from Card

BACK & ENTER 6-3-6-8 (M-E-N-U)

Save Menu to Card - step 1

BACK & ENTER 6-3-6-8 (M-E-N-U)

Save Menu to Card - step 2

BACK & ENTER 7-2-8-3 (S-A-V-E)

Snooze Screen

BACK & ENTER 7-6-6-9 (S-N-O-Z)

Time Screen (Figure 16)

BACK & ENTER 8-4-6-3 (T-I-M-E)

Timed Mag Test

BACK & ENTER 9-2-8-3 (W-A-V-E)

- Some codes are not available on some ovens.

- Oven must be in Off or Cooling Down mode.

USER CONFIGURABLE OPTIONS - ACCESS CODES

The following codes allow access to each function/screen listed. To enable/disable these codes (where applicable),
see above. After each code, press

ENTER.

Function/Screen Simultaneously Press Enter Key Code

Edit Recipe Mode

UP & DOWN 9 (or as specified - see “Set PIN” below)

Erase Menu*

BACK & ENTER 3-7-2-7 (E-R-A-S)

Load Menu from Card Bottom-left, then upper-mid soft key

Master Reset

BACK & ENTER 9-4-7-1

Save Menu to Card Bottom-left, then lower-mid soft key

Set PIN**

UP & DOWN 3-3-4-8 (E-D-I-T)

Test Mode

BACK & ENTER 9-4-2-8 (W-H-A-T)

Unit Test

BACK & ENTER 8-6-4-8 (U-N-I-T)

View Cook Counts 1 & 3

View Faults*** 4 & 6

Zero Cook Counts*

BACK & ENTER 6-7-3-9 (O-R-E-Z)

- Oven must be in Off or Cooling Down mode.

* To execute, press 3 after entering code.

** Set PIN after entering code. Accessing “Edit Recipe Mode” will now require new PIN instead of 9.

*** To view voltage, press ENTER. To initiate a self test, press the corresponding soft key from the voltage screen.

19

THE CONTROL SYSTEM

FIGURE 17: Control System Panel Enclosure and Parts

CONTROL SYSTEM PANEL PARTS

Figure 17.

1. NGC-1040 Cover, Keypad/Display, Std

NGC-1209 Cover, Keypad/Display, SBK

2. 102960 Nut, 4-40, Stainless

3. 100508 Smart Card, Blank

(Varies)* Smart Card, Programmed*

4. NGC-3023 Display Svc Kit (includes

Items 5, 6, and 7)

5. 101954 Spacer, 1/2” Lg, Aluminum

6. 100193 3-Pin Power Cable

7. 100184 26-Pin Ribbon Cable

8. NGC-1110-1 Keypad, NGC, Standard
NGC-1110-2 Keypad, NGC, SWY
NGC-1110-3 Keypad, NGC, SBK
NGC-1110-4 Keypad, NGC, OUT

9. 100506 Smart Card Reader

10. 100182 Smart Card Reader Cable

* Contact TurboChef (800.90

TURBO or

+1 214.379.6000) for more info/part numbers.

1

2

3

4

5

6

7

10

9

THE CONTROL SYSTEM

20

8

ISSUE RESOLUTION

No Display (Blank) 1. Verify power 208 VAC or 240 VAC is going to the oven correctly.

If not, correct the voltage supply.

2. Control DOES NOT beep when any key on the keypad is pressed.

Check power going to the 24VDC power supply. Supply must have
208 or 240 VAC across L and N terminals.



If there is no voltage, replace F1 and F2 fuses.



If the voltage is OK, verify output of power supply is 24 VDC.
If there is no output, change the power supply. If the power
supply is 24 VDC, see below.

Output is 24VDC:

Verify I/O control board has 24 VDC by checking the voltage on
the D6 diode (striped end) on the I/O control board to chassis.
Reference page 54 for a schematic of the I/O control board.



No voltage: Check wires from power supply to I/O control board.



Voltage is 24VDC, but 5VDC is not present on the I/O control
board J3 connector: Replace I/O control board.

3. The control DOES beep when any Key on the Keypad is pressed.

Check all connections between the I/O control board and display.
Correct any loose connections. If connections are OK and 5 VDC is
present on the J3 connector, but there is still no display, replace display.

No Keypad Input 1. Check keypad ribbon cable going to the I/O control board.



Cable and connection bad: Replace keypad.



Cable and connection OK: Replace the I/O control board.

F7: Thermocouple Open

CC Thermocouple
Reads 999ºF/C or
IR Thermocouple
Reads 1999ºF/C

1. Check the connection of open thermocouple on the I/O control board.

If the connection is OK, verify thermocouple is not an open circuit
by using your ohm meter. The cook cavity thermocouple should
measure approximately 4-5 ohms and the IR thermocouple should
measure approximately 30-40 ohms. Measure at the I/O control board
40-pin connector.



Thermocouple indicates open circuit: Replace defective thermocouple.



Thermocouple OK: Replace the I/O control board.

NOTE: F7 fault is not logged in the fault counter.

CONTROL SYSTEM TROUBLESHOOTING

21

THE CONTROL SYSTEM

ISSUE RESOLUTION

F1: Blower Running
Status Bad

Motor not running
when commanded.

1. Status Indicator “A” is highlighted/backlit in TEST MODE.

Verify 208 or 240 (USA) / 230 (Intl) / 200 (Japan) / 220 (Latin America)
VAC is going to the motor controller via pins 2 and 3.



208/240/230 VAC is present: Verify control wiring from the motor
controller and I/O control board, specifically low-voltage wire OR-9.
If all wires are OK, then refer to page 50 for motor controller
troubleshooting.



208/240/230 VAC is not present: Correct wiring going to the motor
controller. Also, check fuses.

2. Status Indicator “A” is still highlighted in

TEST MODE.

Refer to page 50 for motor controller troubleshooting.

F3: Magnetron Current
Low

1. Ensure the K2 mechanical relay is in good working order.

If relay is OK, refer to pages 34-35 (

F3: MAGNETRON CURRENT LOW) for

detailed troubleshooting.

F8: Heat Rise Low

NOTE: This message

occurs in

WARM UP and

SELF TEST if the oven fails

to warm up in the prede­termined time period.

1. Verify the high-limit thermostat is not tripped.



If high-limit is tripped, reset and allow the oven to warm up.



If high-limit is not tripped, proceed to instructions below.

High-limit thermostat is not tripped:

Check both K4 and K5 SSRs by activating them in

TEST MODE (activate

HEATER and IR ELE). When actuated, the (-) control input of the SSR will

go to 0.00 VDC. When the relay is not actuated, the input will read

-24.00 VDC.



If the control voltage is not pulled down during actuation, verify
the wiring between SSR and I/O control board. Replace SSR if wiring
is OK.



If the control voltage is pulled down: Refer to Figure 37 on page 47.

THE CONTROL SYSTEM

22

ISSUE RESOLUTION

F2: Cook Temperature
Low

1. Verify the high-limit thermostat is not tripped.



If high-limit is tripped, reset and allow the oven to warm up.



If high-limit is not tripped, follow the instructions below.

High-limit thermostat is not tripped.

Place a small water load in a microwave/heat-resistant container
(approx. 275 ml) in the oven and place the oven in

TEST MODE. Press

the

MGTRON key to actuate the microwave. While holding down the

MGTRON key, watch the CC and IR temperatures. If either temperature

bounces substantially, there may be a noise (EMI) problem.

To correct this problem, examine the wire routing for each
thermocouple wire. If the wires are routed near any high voltage
components such as the magnetron or high voltage transformers, re­route the wires. If this does not correct the problem, verify that both
magnetrons are securely mounted. Call Technical Support for further
details at

800.90TURBO

or [phone].

23

THE CONTROL SYSTEM

The Microwave System

THE MICROWAVE SYSTEM

25

The Microwave System is the most complex system in

the oven. Proper care must be taken during servicing
to protect both the operator and technician.

VOLTAGE DOUBLER CIRCUIT DESCRIPTION

The Microwave System consists of a magnetron
and Voltage Doubler Circuit. The Voltage Doubler
Circuit consists of a special step-up transformer, a
capacitor, and a diode.

MONITOR CIRCUIT DESCRIPTION

In addition to understanding the Voltage
Doubler Circuit, it is imperative to understand
how the Monitor Circuit operates. The Monitor
Circuit is a failsafe circuit designed to protect the
operator if both the primary and secondary inter­lock switches fail to operate normally.

The Monitor Circuit consists of the primary and
secondary interlock switch, monitor safety switch,
monitor relay, and the F3 fuse. When the oven
door closes during normal operation, the monitor,
secondary, and primary switches close in the order
listed above. When all switches are closed, the
Microwave System is allowed to operate.

If during normal operation any of the interlock
switches open - such as when the oven door opens

- the control will turn off the microwave. If the
monitor switch opens before the primary or sec­ondary switches (abnormal operation), the monitor
switch de-energizes the monitor relay. When this
occurs, a dead short is placed across L1 and L2.
The short then blows the F3 fuse, which perma­nently interrupts power to the Microwave System
until all switches are repaired and/or functioning
properly.

Figure 18 shows a schematic of the Monitor
Circuit. Make sure to note the following:



Primary and secondary switches interlock the
high-voltage control signal. (K2 relay)



Normal operation: When the K2 and K3 relays
energize, power is supplied to the high-voltage
transformers.



Abnormal operation: When K2 is energized
and K3 is un-energized (via an opening of the
monitor switch), L1 and L2 short to blow the
F3 fuse and failsafe.

Figure 19 on the following page details the theory
of operation of the Voltage Doubler Circuit.

FIGURE 18: Monitor Circuit - shown in failsafe state.

K2 HV

+24 VDC

RELAY

1

7

4
3

9

6

A

B

K3 MONITOR

RELAY

7

9

A

B

1
4
3
6

CONTROL

F3 FUSE

20 AMP

LINE VOLTAGE

(L1)

LINE VOLTAGE

(L2)

(BLOWN)

+24 VDC

T1

HV TRANSFORMER

3

1

2

T2

HV TRANSFORMER

1

2

3

MONITOR SWITCH

(OPEN)

NC

NO

C

CDM

CONTROL

CONTROL

PRIMARY AND SECONDARY

INTERLOCKS (CLOSED)

CDS

NC

C

NO

CDP

NC

C

NO

FIGURE 19: Voltage Doubler Circuit Theory of Operation

VOLTAGE DOUBLER THEORY OF OPERATION

Figure 19

1. The high-voltage transformer steps up the input
voltage to approximately 2400 volts peak (4800
volts peak to peak).

2. The high-voltage capacitor charges to 2400 volts
on the positive going voltage via the high volt­age diode’s conduction.

3. The high-voltage transformer plus the charged
high-voltage capacitor supply down to -4800
volts to the magnetron when the voltage goes
negative. (high-voltage diode is back biased.)

4. The magnetron converts negative input voltage
(and current) to RF energy at 2450 MHz.

WARNING: Do not attempt to measure

these voltages.

MICROWAVE SYSTEM PARTS

Figures 20 and 21

11. NGC-3062-1 HV Transformer (2 per oven, 1
per kit) - USA, Mexico, Brazil,
S. Korea

NGC-3062-2 HV Transformer (2 per oven, 1

per kit) - Europe, Asia, Pacific,
Australia, UK, Ireland

NGC-3062-3 HV Transformer (2 per oven, 1

per kit) - Japan

12. NGC-3020 High Voltage Capacitor (2 per
oven, 1 per kit) - USA, Mexico,
Brazil, S. Korea

NGC-3020-2 High Voltage Capacitor (2 per

oven, 1 per kit) - Europe, Asia,
Pacific, Australia, UK, Ireland,
Japan 50 Hz

100207 High Voltage Capacitor (2 per

oven, 1 per kit) - Japan 60 Hz

THE MICROWAVE SYSTEM

26

TRANSFORMER OUTPUT VOLTAGE

+(B)

0

(A)

2400

-

CAPACITOR CHARGES

ON POSITIVE VOLTAGE SWING

+2400 V

-(C)

2400

VDC

Current

Flow

-++

-2400 V

MAGNETRON VOLTAGE

+(B)

0

(A)

-(C)

2400

VDC

-+-

2400

+

CHARGED CAPACITOR PLUS TRANSFORMER

ON NEGATIVE VOLTAGE SWING

Current

Flow

-4800 V

4800

VDC

13. 100481 High Voltage Diode (x2)

14. Mag Fan Relay, Generic
NGC-3030-1 North America
NGC-3030-4 Europe, Asia-Pacific Multiphase
NGC-3030-7 Europe Single Phase
NGC-3030-12 Brazil Single Phase

Mag Fan Relay, SWY
NGC-3030-2 North America
NGC-3030-6 Europe, Brazil Single Phase
NGC-3030-9 Europe, Asia-Pacific Multiphase

Mag Fan Relay, SBK
NGC-3030-3 North America
NGC-3030-13 Europe, Brazil Single Phase
NGC-3030-14 Indiana/North Carolina
NGC-3030-15 Europe, Asia-Pacific Multiphase

Mag Fan Relay, Additional*

15. NGC-3061-1 Filament Transformer (2 per

oven, 1 per kit) - USA, S. Korea

15. Continued:
NGC-3061-2 Filament Transformer (2 per

oven, 1 per kit) - Europe, Asia,
Pacific, Australia, UK, Ireland,
Mexico, Brazil

NGC-3061-3 Filament Transformer (2 per

oven, 1 per kit) - Japan

16. 100083 Mag Cooling Fan

17. 101273 K3 Monitor Relay

18. 101273 K2 High Voltage Relay

19. 101273 K1 Filament Relay

20. 100599 F3 Fuse - 20 Amp

21. NGC-3015 Magnetron (2 per oven, 1 per kit)

22. NGC-3017 Wave Guide (Rear)

23. NGC-3016 Wave Guide (Front)

24. 100186 Magnetron Wire

25. NGC-3015 Magnetron (2 per oven, 1 per kit)

26. 102070 Magnetron Thermostat

27. NGC-1163 Insulator, Adhesive

28. 100684 Screw #6 Sheet Metal

* See Comprehensive Part List, page 79.

F

FA

FIGURE 20: Microwave System Parts

FIGURE

21: Microwave System Parts

11

12

13

15

15

16

14

17

18

19

20212223

FILAMENT AND HIGH
VOLTAGE TERMINALS

COOLING
FINS

(ORG)

(BLK)

ANTENNA

25

26

27

28

24

27

THE MICROWAVE SYSTEM

MICROWAVE SYSTEM COMPONENTS

Below is a description of each component within
the Microwave System.

Magnetron

Magnetrons supply the RF energy at 2.45 GHz
and begin to oscillate when they are supplied with
approximately 4.1KVDC at approximately .350 mA.
During operation each magnetron will output a
nominal 1 kW of power.

High-Voltage Transformers

High-voltage transformers are a ferro-resonant
design which limits fault currents and minimizes
magnetron power changes due to input voltage
changes. The high-voltage transformer supplies
the high voltage for the Voltage Doubler Circuit.
They are controlled via the K2 relay.

WARNING: Never attempt to measure

the voltage values of the high-voltage trans­formers with the high-voltage transformers enabled.
Lethal voltage will be present. Reference page 30
for proper measuring technique.

Filament Transformers

For better operation and reliability, the oven
uses separate transformers in order to preheat the
magnetron filament.

The control energizes the filament transformers for
approximately five (5) seconds prior to energizing
the Microwave Circuit via the high-voltage trans­formers. When in operation, the filament trans­formers supply approximately 3.15 VAC at 10 amps
to each magnetron filament. The filament trans­formers are controlled via the K1 relay.

F3 Fuse

The F3 fuse is a 20-amp, class CC fuse designed to
blow in case of an over-current scenario, such as a
high-voltage transformer or capacitor failure. The
fuse also blows if the Monitor Circuit trips the
failsafe.

High Voltage Capacitors

Capacitor rating is 0.91uF, 2500 VDC for USA,
Mexico, Brazil, and S. Korea.

Capacitor rating is 1.15 uF, 2500 VDC for
Europe, Asia, Pacific, Australia, UK, Ireland, and
Japan 50 Hz.

Capacitor rating is 0.85 uF, 2500 VDC for Japan
60 Hz.

High Voltage Diodes

Rated at 16 kVDC.

Monitor Relay (K3)

The monitor relay, K3, acts as a failsafe device in
the Voltage Doubler Circuit. In its normal un-ener­gized position, the monitor relay shorts L1 and L2.
If the K2 relay energizes the high-voltage trans­formers while the K3 relay is un-energized, the F3
fuse will blow.

Magnetron Thermostats

The magnetron thermostats are open-on-rise ther­mostats. These thermostats are designed to open at
212ºF (100ºC), which triggers an F5 fault.

NOTE: Both magnetron thermostats are wired

in series. If one opens, the control will switch off
both magnetrons until the thermostats close. The
thermostats are self-resetting.

Magnetron Cooling Fan

The magnetron cooling fan supplies cooling air for
both magnetrons. The fan operates at 208 or 240
(USA) / 230 (Intl) / 200 (Japan) / 220 (Latin
America) VAC and is controlled via the K7 relay
(see Item 14 on Figure 20).

If the oven does not have this relay installed, it is
required that you order the relay kit through
Customer Service. See page 27, item 14 for part
numbers. If you are unsure which kit to order,
determine the software type before contacting
Customer Service.

THE MICROWAVE SYSTEM

28

FIGURE 22: Wave Guide Cover/Wave Guide Removal and Replacement

To determine software type,

1. Make sure the oven is in the

COOLING

DOWN

/

OVEN OFF mode.

2. Simultaneously press the

BACK and ENTER keys.

3. Enter code 9-4-2-8 (

W-H-A-T) and press ENTER.

4. The top line on the screen will display the word

TEST, followed by the software type (for
example,

V2SWY, or TRNADO).

WAVE GUIDE COVER REPLACEMENT

The wave guide covers keep moisture and debris
out of the wave guides. If contamination gets into
the wave guides, the life of the magnetrons may be
shortened. Be careful to not allow debris to enter
the wave guides when replacing the covers.

To remove the wave guide covers, reference Figure
22 and follow the steps below:

1. Locate the fourteen (14) #8 sheet metal screws
securing the broken wave guide cover. If the
screw heads are dirty, it will be necessary to
clean the heads thoroughly.

CAUTION: Do not strip the screw heads.

2. Remove the fourteen (14) #8 screws. The cover
should come loose with gentle pressure.



x

DO NOT remove the two right and left-most

screws (Item 30). These screws secure the wave
guides to the oven floor. Only remove them if the
wave guide is also being serviced.

3. Remove the old wave guide cover and discard,
unless otherwise specified.

NOTE: It may be necessary to gently pry the

wave guide covers to remove them from the
oven floor as they are sealed with

RTV.

29

31

30

32

33

34

35

36

37

29

THE MICROWAVE SYSTEM

4. Using acetone, clean the oven floor where the
new wave guide cover will sit.

5. Apply a

1/8” diameter bead of high temperature

RTV (included with Item 29) along the outside

edge of the wave guide cover flanges.

NOTE: It is important to use the correct high

temperature

RTV as supplied by TurboChef.

6. Place the new wave guide cover in place. Secure
with the fourteen

(14) screws provided with Item

29

.

7. Wait 15 minutes for RTV to cure.

8. Warm oven to set temperature and re-check the
tightness of screws. Tighten if necessary.

WARNING: Inside of oven and IR element

are HOT! Use extreme caution during step 8.

WAVE GUIDE/WAVE GUIDE COVER PARTS

Figure 22

29. NGC-3036 Kit, Wave Guide Cover (Includes

Item 31 and sealant)

30. 101666 Screws, #8-32 x 1/2, Cap

31. 101701 Screws, #8, SST

32. NGC-1047

Support, Frame

33. 102809

Screws, #8-32 x 3/8” CSK (100

º

)

34.

NGC-3017 Assy, Wave Guide, Rear

35. NGC-3015 Magnetron, Rear

36. NGC-3015

Magnetron, Front

37. NGC-3016 Assy, Wave Guide, Front

WAVE GUIDE REPLACEMENT

1. Remove the wave guide cover. See WAVE GUIDE

COVER REPLACEMENT

on page 29.

2. Remove the right side panel and frame support
(Item 32).

3. If replacing the front wave guide, use the NGC-

3016 kit. If replacing the rear wave guide, use
the NGC-3017 kit.

4. Remove the two

(2) right and left-most screws

(Item 30) that secure the wave guide to the oven
floor.

5. The wave guide should now be loose enough to
easily slide out from the right side of the oven.

NOTE: Be careful to not damage the insulation

when removing the wave guide.

6. Install the new wave guide using the mounting
screws provided with the kit (Item 34 if rear
wave guide, Item 37 if front).

CAUTION: Do not pinch insulation between

the wave guide and oven bottom.

7. Reinstall the wave guide cover.

8. Reinstall the side panel and apply power to the
oven.

HIGH VOLTAGE AND FILAMENT TRANSFORMER
REPLACEMENT

Wiring the High-Voltage Transformers

The proper reinstallation of the high-voltage and fil­ament transformers is critical. Upon removing a
high-voltage transformer, make sure to note where
each wire was installed. Refer to the oven schemat­ics (pages 55-63) detailing the proper wiring.
Specifically, T1 and T2 are located in the top-right
corner of the schematics.

As shown in the schematics, transformers are
installed mirror opposite and wired

180

º

out-of­phase. It is essential for longevity that the high-volt­age transformers remain 180ºout-of-phase. This can
be checked by placing a volt meter across terminals

T1-1

and T2-1.

With the Microwave System energized, the volt meter
will read

the incoming voltage (different readings for

different countries).

If the meter reads 0 VAC, the

THE MICROWAVE SYSTEM

30

high-voltage transformers are most likely wired in­phase. As a last check, energize the Microwave
System and verify the voltages between the taps on
each high-voltage transformer. The wiring issue
must be corrected prior to returning the oven to
service, as the voltages must be:



NORTH AMERICA: 208 VAC between 1&2 and

240 between 1&3.



LATIN AMERICA: 220 VAC



JAPAN: 200 VAC



INTERNATIONAL: 230 VAC

NOTE

: The terminals with the orange dot or

the orange wire always go to terminal

3 on USA

models

.

Wiring the Filament Transformers

The installation of filament transformers is
straightforward. Filament transformers are wired
in-phase and in-line. Refer to the schematics on
pages 55-63, detailing the proper wiring.
Specifically, FT1 and FT2 are located in the
middle-far right edge of the schematics.

To verify correct wiring (North America), meas­ure the voltages between terminals

1&2and 1&3

on FT1 and FT2. The voltages must be 208 and

240 VAC respectively.

NOTE

: The terminals with the orange dot or the

orange wire always go to Terminal

3 on US models.

To verify correct wiring (International), measure the
voltage between the taps on FT1 and FT2. The volt­age must be 220 VAC (Latin America), 200 VAC
(Japan), or 230 VAC (International).

MEASURING RF LEAKAGE FOR MICROWAVE SAFETY

An RF (microwave) leakage test must be performed
at the conclusion of the following service tasks:



Door removal, replacement and/or adjustment



Wave guide removal and/or replacement



Magnetron removal and/or replacement

WARNING: If the unit fails the radiation

test (leakage greater than 4 mW/cm

2

), the
oven must be taken out of service immediately until
the defect is corrected. In addition, the CDRH
Regulations 21 Subpart C, 1002.20 requires that
leakage readings of over 4 mW/cm

2

must be

reported to the manufacturer.

Procedure for Measuring RF Leakage

1. Place the oven in

WARM UP and allow it to warm

up to the set temperature (CCSP). This should
take approximately 13 minutes if the oven is
starting out cold.

2. Once the oven has warmed up, place the oven

into

TEST MODE (see page 14). Place a water

load into the cook cavity. Water load must con­form to the following specification:
a. Volume: 275ml ± 15ml
b. Temperature: 68 ± 9ºF (20 ± 5ºC)
c. Vessel: Low form, 600 ml beaker with an

inside diameter of approximately 3.35” (85
mm) and made of Pyrex or glass ceramic.

3. Position the microwave survey meter as shown

in Figure 23.

4. Press and hold the

MGTRON soft key to energize

the Microwave System.

FIGURE 23: Microwave Survey Meter Placement

31

THE MICROWAVE SYSTEM

THE MICROWAVE SYSTEM

32

5. While holding the MGTRON soft key, move the sur­vey meter around the outline of the oven door,
keeping the tip of the meter in contact with and
perpendicular to the oven door. Record the highest
leakage.

6. Using the same procedure, measure the leakage
with the oven door opened to the point just before
the primary and secondary switches disengage.
Record the highest leakage.

TIP: To hold the oven door open for this

test, back out the top center screw around the
perimeter of the oven door. Continue backing
this screw out until the primary and secondary
interlock switches disengage. As this point, tighten
the screw until both switches re-engage.

7. Using the same procedure, measure the leakage
around the oven’s entire exterior surface. Record the
highest leakage.

HOW TO TEST MICROWAVE COMPONENTS

Testing the High-Voltage Diode

The high-voltage diode (Figure 24) is assembled by
connecting several 1000-1500 volt semiconductor
diodes in a series to increase the reverse voltage capa­bility. In the circuit, the high-voltage diode conducts
to prevent the filament voltage from becoming posi­tive, thus as the high-voltage winding of the trans-

former goes to 2400 VPK, the high-voltage capacitor is
charged to 2400 volts. When the high-voltage wind­ing starts to go toward negative, the high-voltage diode
becomes non-conducting with the charged high-volt­age capacitor in series with the high-voltage winding.
When the transformer gets to its negative peak of

-2400 VPK, the voltage applied to the filament is
negative 4500 volts.

WARNING: Never attempt to measure high

voltage directly.

How to Check a Diode

1. Disconnect the oven from the power source.

2. Fully discharge the capacitors.

3. Connect the voltage meter in series with the diode.

4. Using a multimeter set to DC voltage, connect
one meter lead to one side of a 9-volt battery
and the other lead to one side of the diode.

5. Connect the other side of the 9-volt battery to
the other side of the diode. DC voltage should
only be present on the meter in one direction.

6. Switch the meter leads on the diode, which will
cause the opposite reading to be visible.
Depending on the voltage of the battery, voltage
between 5-7 VDC should be present in only one
direction and 0-0.1 VDC in the other direction.

FIGURE 24: High Voltage Diode

FIGURE 25: Magnetron

FFA

FILAMENT AND
HIGH VOLTAGE
TERMINALS

ANTENNA

THE MICROWAVE SYSTEM

33

HIGH VOLTAGE TRANSFORMERS PRIMARY VOLTAGE, FREQ, TAPS,

AND RESISTANCE

SECONDARY TAPS AND
RESISTANCE

NGC-3062-1 208 VAC, 60 Hz, 1 & 2,

0.819–1.001

W

240 VAC, 60 Hz, 1 & 3,

0.972–1.188

W

4, Ground, 53.60–65.52

W

NGC-3062-2 230 VAC, 50 Hz, 1 & 2,

0.972–1.188

W

3, Ground, 57.52–70.30

W

NGC-3062-3 200 VAC, 50/60 Hz, 1 & 2,

0.784–0.958

W

3, Ground, 55.75–68.13

W

FILAMENT TRANSFORMERS PRIMARY VOLTAGE, FREQ, TAPS,

AND RESISTANCE

SECONDARY TAPS AND
RESISTANCE

NGC-3061-1 208 VAC, 60 Hz, 1 & 2,

17.49–21.37

W

240 VAC, 60 Hz, 1 & 3,

20.61–25.19

W

4, 5, very low resistance - if read­ing is open, transformer has failed.

NGC-3061-2 230 VAC, 50 Hz, 1 & 2,

18.99–23.21

W

3, 4, very low resistance - if read­ing is open, transformer has failed.

NGC-3061-3 200 VAC, 50/60 Hz, 1 & 2,

15.70–19.18

W

3, 4, very low resistance - if read­ing is open, transformer has failed.

HIGH VOLTAGE AND FILAMENT TRANSFORMER RESISTANCE TABLE

How to Check a Capacitor

1. Disconnect the oven from the power source.

2. Fully discharge the capacitor.

3. Isolate the capacitor from the circuit.

4. Connect the ohmmeter between the capacitor
terminals. The ohmmeter should momentarily
indicate a low impedance and then slowly return
to infinite resistance.

5. Reverse the ohmmeter leads and repeat Step 4.

6. Check each terminal to case. Infinite resistance
(open) should be indicated.

How to Check a Magnetron for Open/Shorted Filament

1. Disconnect the AC power source and discharge
the high-voltage capacitors.

2. Isolate the magnetron from the circuit by removing
the wires from the F and FA terminals. Figure 25.

3. An ohmmeter connected between the filament
terminals (F, FA) should indicate a reading of
less than 1 ohm. Figure 25.

4. A continuity check between either filament
terminal and the magnetron chassis should indi­cate an infinite resistance (open).

How to Check a High-Voltage or Filament Transformer

1. Disconnect the AC power source and discharge
the high-voltage capacitors.

2. Disconnect all the wires in question going to
the transformer.

3. Use an ohmmeter to check the impedance of the
primary and secondary winding. Refer to the
high-voltage and filament transformer table below
to determine if the transformer is OK. If the
resistance is different then the table indicates,
replace the transformer.

ISSUE RESOLUTION

Magnetron
Troubleshooting
Guidelines

WARNING: Never test the secondary voltages. Voltage on this side of the

circuit is lethal, reaching up to 5000 volts!

All tests performed on the components are done with the oven unplugged
and the capacitors discharged.

The capacitors in this oven utilize a device that will automatically discharge
the voltage.

WARNING: Always verify the capacitor is discharged before servicing the

components.

Discharging can be done by unplugging the oven and then short across the
red wire on each capacitor to the chassis with an insulated screwdriver.

F3: Magnetron
Current Low

1. Remove the top and right side covers.

2. Enter the test mode. (From the

OVEN OFF mode, simultaneously press

BACK and ENTER keys, enter the code 9-4-2-8 and press ENTER).

3. Place amp meter on the brown (US ovens) or blue (International ovens)
"ct" wire for amp reading. Wire is coming from the primary side of the
HV transformers and looping through the black plastic current trans­former on the main control board and back to the HV transformers.

4. Press and hold the

MGTRON soft key on the keypad to energize the

magnetrons.

5. Observe the amperage on the meter. Typical readings are:



NORTH AMERICA: 12-14 amps at 240VAC/13-16 amps at 208VAC.



INTERNATIONAL: 12-15 amps at 230VAC



BRAZIL: 12-15 amps at 220VAC



JAPAN: 16-17 amps at 200VAC

If proper amperage appears but takes longer than 2 complete seconds to
appear, call TurboChef Tech support for assistance. If amperage is present
but lower than typical readings, perform the troubleshooting steps in the
previous pages of this section. If amperage is not present, check the condi­tion of the F3 fuse. Fuse must be a 20-amp fuse and is the right-most of
the three fuses on the bottom of the oven.

If fuse has failed, replace the fuse after troubleshooting (previous pages of
this section). If fuse has not failed, check the incoming (primary side)
voltage to the high-voltage transformers.

MICROWAVE SYSTEM TROUBLESHOOTING

THE MICROWAVE SYSTEM

34

ISSUE RESOLUTION

F3: Magnetron
Current Low (cont.)

WARNING: Never try to check the secondary voltages of the High

Voltage Transformers.

With the top cover removed, safe access to the three (if US oven)/two (if
International oven) terminals on the top of the transformers is available.

NORTH AMERICA - Place the AC voltmeter across terminals 1+3. Press and

hold the

MGTRON soft key. Voltage present should be 240 +/- 10%.

INTERNATIONAL - Place the AC voltmeter across terminals 1+2. Press and

hold the

MGTRON soft key. Voltage present should be 230 +/- 10%.

JAPAN - Place the AC voltmeter across terminals 1+2. Press and hold the
MGTRON soft key. Voltage present should be 200 +/- 10%.

If voltage is present on both high-voltage transformers, perform the compo­nent troubleshooting steps in the previous pages of this section.

If voltage is not present, check for 24VDC control voltage from I/O board
to the K2 relay. Access voltage reading from the "QC3" connection located
at the bottom right side of the wiring harness. When the

MGTRON key is

pressed and held, 24VDC should be present on pins 1+5. Reference the
schematics (pages 55-63) for physical location of pins on QC3 connector.

If voltage is present at the connector, inspect the K2 relay and the wiring.
Unplug the oven and replace relay if necessary.

If voltage is not present at connector, check wiring connections at the con­trol board on the 40-pin connector. Also check the wiring between the two
connectors. Unplug the oven and replace control board if necessary.

F3 Fuse Blown Replace the F3 fuse and determine why F3 fuse opened.

Generally, the F3 fuse opens for one of three reasons:

a. HV transformer primary winding shorted: Unplug the oven and

replace the HV transformer. Follow troubleshooting on page 33 to
determine cause of failure.

b. HV capacitor shorted or failing: follow troubleshooting on page 33.

If necessary, unplug the oven and replace the HV capacitor.

NOTE: A failing HV capacitor will typically cause the HV

transformer that supplies power to the failing capacitor to draw
excessive current, which may open the F3 fuse.

THE MICROWAVE SYSTEM

35

ISSUE RESOLUTION

F3 Fuse Blown, cont. c. Monitor circuit fault: Verify operation of all interlock switches.

In addition, check the Fault Log. If the monitor switch opened prior to
the primary and secondary, the control would have recorded the
occurrence. See page 25 as well as Chapter 6 (Oven Door) for
troubleshooting (see

F4 MONITOR).

Mag 1 or Mag 2 Not
Working or Food Not
Cooking Evenly

Determine which magnetron is not oscillating by placing a clamp-on
amp meter on the primary winding of each high-voltage transformer
and energizing the Microwave System.

1. Amp = 0. High-voltage transformer not energizing.

Check K2 relay and wiring going to suspect high-voltage transformer.



K2 relay or wiring bad: Replace K2 relay and/or repair wiring.



K2 relay OK: Check high-voltage transformer. See the table on page
33 for resistance values. Unplug the oven and replace high-voltage
transformer if defective.

2. Amps = 3 amps on high-voltage transformer. Magnetron is not
oscillating, but high-voltage transformer is energizing.



Diodes failed: Unplug the oven and replace the diodes.



Diodes OK: Unplug the oven and replace the defective magnetron.

Magnetron Circuit
is Drawing Excessive
Current.

Measure resistance of high-voltage capacitor(s).

Resistance should start out in the megohm range and continue to rise as
the probes are held on the capacitor. If the resistance is low (less than the
megohm range), unplug the oven and replace the capacitor. Visually check
the associated high-voltage transformer primary winding for signs of over­heating (winding is very dark and discolored). If transformer primary
winding looks bad, replace it.

High Voltage and/or
Filament Transformer(s)
Faulty

Determine if the high-voltage or filament transformer(s) is defective.

Use an ohm meter to measure the primary and secondary winding
resistances. Refer to the high-voltage and filament transformer table on
page 33 to determine if the transformer is OK. If the resistance is
different then the table indicates, ensure the oven is unplugged and
replace the transformer.

Wave Guide
Covers Broken

Replace the wave guide covers. Follow the instructions on pages 29-30 and

Figure 22 on page 29. Inspect the wave guides for debris. If debris is pres­ent, replace the wave guide and the magnetron.

THE MICROWAVE SYSTEM

36

The Oven Door

The proper fit and adjustment of the oven door is

essential for safe and reliable operation of the NGC
(Tornado) oven.

The oven door provides three primary functions:

1. To protect the operator from the hot
convection airflow.

2. To protect the operator from exposure to
microwave energy.

3. To actuate the interlock switches.

REMOVING/REINSTALLING THE OVEN DOOR

To remove or reinstall the oven door, follow the
steps below. Refer to Figure 26.

1. Ensure the oven has cooled.

2. Open the oven door to its full open position.
Locate the two (2) thru holes in the bottom of
the left and right hinge assemblies. Insert a screw
or nail into the holes to keep the hinges open
while removing the oven door.

3. Locate and remove the #38 screws (3 each side).

4. Remove the plastic caps.

NOTE: The 10x32 screws do not need to be

removed, as they are used for adjusting the door.

5. Remove the oven door by pulling the door away
from the oven. It will slide off the hinges.

OVEN DOOR PARTS

Figure 26

38. 102809 #8-32 x 3/8” PFH CSK

39. NGC-3067 Assy, Oven Door (Traditional)

NGC-3067-2 Assy, Oven Door (SBK)

40. NGC-1061 Hinge Block

41. 102804 Right Hinge

42. 102805 Left Hinge

43. 101381 #10-32 x 1/2” Hex SS

44. 102140 #10 Flat

45. 102350 #10 Split Lock

46. 101191 Cap, Hole

FIGURE 26: Oven Door Removal & Parts

38

39

40

41

2

42

43

44

45

46

THE OVEN DOOR

37

ADJUSTING THE OVEN DOOR

WARNING: Procedure should be done while

oven is hot. As a result, exercise extreme
caution when adjusting the door.

1. Open the oven door and remove the plastic caps.

2. Ensure that the 3 screws on each side of the door
are tight.

3. Remove the control panel, two

11

/32” nuts and

wiring from I/O board.

4. Loosen the hex screws and close the door.

5. Tap the center of the door to allow door and
frame to align properly.

6. Tighten screws and reinstall the control panel.

7. Plug in the oven and perform a MW leak test (see
page 31 for instructions).

Critical Adjustment Notes

1. The doors in Figures 27 and 28 are adjusted
incorrectly. Note how the bottom (Figure 27)
and top (Figure 28) of the door can be rotated
away from the Flange.

CORRECTIVE ACTION: Loosen the hex screws

and push the door towards the flange and re­tighten. The hinge springs will naturally pull the
door to the flange. Tapping the center ensures a
level surface and a proper seal, as opposed to
pushing one end (which could cause the opposite
end to lift away from the flange).

Pull the door open only 0.25” (6 mm) and let go
of the handle. The door must completely snap shut

on its own. If the door sticks and force is needed

to finish closing it, it is out of adjustment.

NOTE: See Figure 26, page 37, Items 43-46 for illus-

tration of hardware.

WARNING: Check for excessive Microwave

Leakage after adjusting the Cook Door. See

page 31 for proper procedure.

PREPARING THE OVEN FOR SWITCH ADJUSTMENT

1. Disconnect the power to the oven and remove
left and right side covers.

2. Ensure oven door assembly is properly adjusted
and all mounting screws are secured (see previous
section on adjusting the oven door).

3. Ensure the left and right hinge assemblies are
properly mounted to the oven flange.

Oven Burn-In Procedure

If the oven is already at its set temperature at the
time of service, skip this procedure.

1. Apply power to oven.

2. Simultaneously press the

BACK and ENTER

keys.

3. Enter 8-6-4-8 (

U-N-I-T), then press ENTER.

4. Press

BURN-IN. The oven will warm up and

idle for 25 minutes.

ADJUSTING THE PRIMARY AND SECONDARY
INTERLOCK SWITCHES - OLD SWITCH SETUP

The old switch assembly is identifiable by the pri­mary and secondary interlock switches being
located on the left side of the oven. Also, the serial
number of the oven will follow the formatting
below (X = variable digit/letter):

NGC-XXXXX (North America)
NGCXX-XXXXX (International)

To properly adjust the switches, follow the proce­dure below:

1. Ensure the oven door is adjusted properly. Refer
to the previous section on adjusting the oven
door.

2. Unplug the oven.

THE OVEN DOOR

38

FIGURE 27: Mis-adjusted Oven Door

FIGURE 28: Mis-adjusted Oven Door

3. Open and close the door several times to ensure it
closes smoothly and the door actuator (Item 47)
clears the slot in the flange. Reference Figure 29.
The actuator must not hang or rub the opening
or flange. Carefully bend to clear opening.

4. While the oven door is closed, verify that the
bottom of the toggle is 85ºto the bottom of the
frame (Figure 29). If not, use items 75 and 76
(page 42) to achieve proper angle.

5. Temporarily adjust the primary and secondary
interlock switches by loosening the #8-32 screw
(Item 49) and the two (2) #4-40 screws (Item

50). Figure 29.

6. Rotate the interlock switches (Item 51) until the
gap between the switch paddles and the switch
body is 0.02” (0.5mm). Figure 29.

7. Restore power to the oven. Allow the oven to
warm to its set temperature.

8. Allow the oven to remain at the set temperature
for ten (10) minutes after warm up before making
any final adjustments, which may be needed

because the door can move as a result of temper­ature change.

9. Securely tighten Items 49 and 50 after any final
adjustments have been made.

10. Complete the steps for measuring RF leakage

found on page 31. Make further adjustments if
necessary.

NOTE

: High-temperature grease (Item 62) must be
present between the torsion spring and the switch
bracket assembly to ensure smooth action.

PRIMARY AND SECONDARY INTERLOCK SWITCH
ADJUSTMENTS AND PARTS

Figure 29

47. NGC-1076-2 Actuator, Door

48. 102809 Screw, #8-32 x 3/8” 100Þ CSK

49. 102921 Screw, #8-32 x 3/8”

50. 101557 Screw, #4-40 x 1 1/4”

51. 102012 Interlock Switches

52. NGC-3033 Assy, Door Switch*

*See Figure 30 for assembly detail.

THE OVEN DOOR

39

FIGURE

29: Correct Primary and Secondary Interlock

Adjustment and Parts - Old Switch Setup

DOOR SWITCH ASSEMBLY AND PARTS

Figure 30, next page

53. NGC-1072 Bracket Latch

54. 102012 Switch, Micro, 0.1A/125VAC

55. NGC-1087 Spring Door Latch

56. NGC-1073 Toggle, Latch

57. 101119 Pin, Clevis, ø3/16 x 1” Lg

58. 100059 Bearings, Bronze,
3/16ID x 5/16OD x 1/4” Lg

59. 101557 Screw, #4-40 x 1.25” Lg,
PPHD, CRES

60. 102921 Screw, #8-32 x 3/8”, Internal
Tooth Sems, PPHD, SS

61. NGC-1126 Plate, Door Switch

62. NGC-3006 Grease, USDA H-1, Food Grade

63. 101296 Ring, E-clip

Assembly Notes

1. Ring, e-clip (Item 63) is supplied with Item 56.

2. Spring and bracket must be lubricated with high-

temperature pure FM grease (Item 62).

3. Assembly must be hand-tightened prior to any

final adjustment.

ADJUSTING THE MONITOR SWITCH - OLD SETUP

The old switch assembly is identifiable by the moni­tor switch being located on the right hinge assembly.
Also, the serial number of the oven will follow this
formatting (X = variable digit/letter):

NGC-XXXXX (North America)
NGCXX-XXXXX (International)

To adjust the switch, follow the steps below.

1. Ensure the oven door is adjusted. Refer to

ADJUST-

ING THE COOK DOOR

on page 38.

2. Turn on oven and bring it to the set temperature.

WARNING: Oven surfaces are HOT! Use

extreme caution when making adjustments.

3. Open and close the oven door several times to
ensure the door closes smoothly and the door
actuator (Item 47) clears the slot in the flange.
Reference Figure 29.

4. Disconnect oven from power source.

5. To adjust the monitor safety switch (Figure 31),
loosen the #8-32 screw and the two (2) #4-40
screws (Items 68 and 69) securing the switch.

6. Rotate the monitor safety switch (Item 65) until
the gap between the switch paddle and the switch
body is 0.02” (0.5 mm).

7. Open and close the oven door several times to
make certain the adjustment is correct.

8. Tighten all screws.

9. Reconnect oven to power source.

10. Allow oven to sit at the set temperature for 10

minutes and confirm all adjustments.

MONITOR SAFETY SWITCH PARTS

Figure 31, next page

64. 102804 Hinge, Right

65. 102012 Switch, Limit, Micro

66. NGC-1126 Plate, Door Switch

67. 101912 Standoff, #8-32F/Fx1 in S

68. 102921 Screw, #8-32 x 3/8”

69. 102902 Screw, 4-40 x 5/8”

SWITCH GAP

= 0.020”

4950

51

52

TOGGLE SHOULD BE LESS THAN

OR EQUAL TO

85

º

DOWN

APPLY HI

-TEMP

GREASE TO AREA

48

47

THE OVEN DOOR

40

FIGURE 31: Monitor Switch Adjustment and Assembly -

Old Switch Setup

FIGURE 30: Door Switch Assembly and Parts - Old Switch Setup

58

61

57

1

53

63

59

54

60

55

62

2

56

x2

68

67

68

64

66

68

67

69

65

REF

x2

THE OVEN DOOR

41

ADJUSTING THE PRIMARY INTERLOCK SWITCH ­NEW SWITCH SETUP

The new switch assembly is identifiable by the pri­mary switch being located on the left side of the
oven. Also, the serial number of the oven will fol­low the formatting below (X = variable digit/letter):

NGCD(5 thru 9)XXXX (North America)
NGCXXD(5 thru 9)XXXX (International)

1. When the oven completes

BURN IN (if

required, see page 38), closely examine the latch
toggle position using the door switch gauge
(Item 75).

2. If the toggle is past the top of the window, you
must correct the toggle's position by installing
an 0.030” Shim (Item 76). See Figure 32.

3. Verify position of toggle by opening and closing
the oven door.

4. With the toggle correctly adjusted and the door
closed, adjust the primary switch by loosening
the two #4-40 screws and #8-32 screw.

5. Using a 0.030” (0.762 mm) spacer as a template
(included with Item 74), adjust switch lever
position to a maximum allowable distance of

0.030” (0.762 mm).

6. Open and close the door several times to verify
the switch gap.

PRIMARY SWITCH ADJUSTMENT AND PARTS

Figure 32

70. 102809 Screw, #8-32 x 3/8” 100Þ CSK

71. 102921 Screw, #8-32 x 3/8”

72. 101555 Screw, #4-40 x 3/4”

73. 102012 Interlock Switch

74. NGC-3033 Assy, Door Switch*

75. Adjustment Tools (included with Item 74)
NGC-1215 Door Switch Gauge
NGC-1340 Shim Tool, 0.060”
NGC-1344 Shim Tool, 0.030”

76. NGC-1169-1 Shim, 0.030”
NGC-1169-2 Shim, 0.045”

*Refer to FSB-10057 (included with Item 74) for
instructions on converting NGC-3033 kit into the
new switch assembly.

Assembly Notes

1. Tip of toggle must be within window notch.

Optimal is centered or below centered when the
oven is hot.

2. Tip of toggle adjustment notch. Toggle must be

within notch when oven is hot.

3. If toggle “hangs” in position as shown, decrease

number of shims.

75

2

1

71

72

73

74

APPLY HI-TEMP
GREASE TO AREA

70

FIGURE 32: Primary Switch Adjustment and Parts -

New Switch Setup

76

3

THE OVEN DOOR

42

ADJUSTING THE SECONDARY AND MONITOR
INTERLOCK SWITCHES - NEW SWITCH SETUP

1. Disconnect power to the unit.

2. Disconnect the 40-pin connector from the I/O
board to allow maximum clearance.

3. Using the 0.060” (1.524 mm) spacer as a
template (included with item 74), adjust the
secondary switch.

NOTE: This will also adjust the monitor switch.

4. Open and close the door several times to verify
the switch gap.

NOTE

: The absolute maximum gap should not

exceed 0.060” (1.524 mm).

5. Re-connect the 40-Pin connector to the I/O
board and apply power to the unit.

6. Simultaneously press

BACK and ENTER keys.

7. Enter 9-4-2-8, then press

ENTER.

8. Open the oven door and verify P, S, and M

disengage in sequence.

9. Close the oven door and verify the M, S, and P
engage in sequence.

10.Energize the Microwave System and open the
door.

11.Verify the W indicator is backlit, meaning the
oven microwave system turns OFF when the
door is open.

SECONDARY AND MONITOR SAFETY SWITCH PARTS

Figure 33 and 34

77. 102804 Hinge, Right

78. 102012 Switch, Limit, Micro (x2)

79. NGC-1126 Plate, Door Switch

80. 101914 Standoff, #8-32 F/F x 1”, 5/16”

DIA

81. 101915 Standoff, #8-32 M/F x 5/16”,

1/4” DIA (attached to outside
of Item 80.)

82. 102921 Screw, #8-32 x 3/8”

83. 101558 Screw, 4-40 x 1.125”

FIGURE 33: Secondary/Monitor Adjustment and Parts -

New Switch Setup

79

80

82

x2

83

x2

78

81

82

77

80

82

81

FIGURE 34: Secondary/Monitor Switch Assembly -

New Switch Setup

THE OVEN DOOR

43

OVEN DOOR ASSEMBLY

See Figure 35 above. For mis-adjustments, see
Figures 27 and 28 on page 39.

OVEN DOOR PARTS

Figure 35

84. NGC-3067* Door, NGC, Generic*
NGC-3067-2* Door, NGC, SBK*

85. NGC-3021 Kit, Shunt Plate

86. NGC-1061 Hinge Block

87. 102750 Handle, Door, Generic
NGC-1216 Handle, Door, SBK

88. NGC-1076-2 Actuator, Door

89. NGC-1132 Shim, Door Latch

90. 102945 Bolt, 1/4”-20 x 1.00

91. NGC-1138 Label, Precaution

92. 102809 #8-32 x 3/8” CSK 100°

93. NGC-1165 Label, Caution Empty

94. NGC-1125-1 Door Insulation 1
NGC-1125-2 Door Insulation 2

95. NGC-1127 Channel, Door Handle

96. 102748 Screw, #8-32 x 3/8”,

Torx Security

97. 101688 Screw, #8 x 1/2” PTH

98. 102698 Tape, Aluminum

99. NGC-1155 Name Plate, TurboChef

100. 101293 Nut, Push, 1/8”

101. NGC-1170 Label, Service

* Includes items 85 - 101.

FIGURE 35: Oven Door Assembly

85

84

86

x2

88

89 96

x2

87

95

x2

5

93

91

x6

94

98

90

92

AR

2

97

x17

5

99

101

x2

100

1

6

THE OVEN DOOR

44

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SHUNT CAVITY/PLATE

Tightening Sequence

SHUNT ASSY/DOOR COVER

Tightening Sequence

5

84159

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12

14

15

13

16

14

8

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FIGURE 36: Oven Door Assembly: Tightening Specs

Critical Adjustment Notes (Figure 35)

1. Orient with the gasket seam at the bottom of
the door assembly. Gasket should be straight
with no twists or pinching.

2. Attach insulation (Item 94) to the inside of the
door cover using aluminum tape (Item 98).



x

DO NOT block openings at bottom.

3. Item 94 (insulation) not shown for clarity.

4. Door should be flat without twisting or
warpage after tightening all hardware.

5. Refer to the chart to the right for torque specs.
Refer to Figure 36, above, for tightening
sequences.

6. Attach Item 99 with adhesive backing using
the two locating holes on the front cover.

PART TORQUE

VALUE

90. Bolt, 1/4”-20 x 1.00 80 In-Lbs
(9.04 Nm)

85. Nut, Keps #8-32

(Assembled by factory)

21 In-Lbs
(2.37 Nm)

96. Screw, 8-32 x 3/8”

Torx Security

21 In-Lbs
(2.37 Nm)

97. Screw, 8 x 1/2” PTH

21 In-Lbs
(2.37 Nm)

SCREW TORQUE CHART

Refer to Figures 35, 36.

THE OVEN DOOR

45

INTERLOCK SWITCH TROUBLESHOOTING

ISSUE RESOLUTION

“Cook Door Open”

Message

Determine which interlock switch is open. Access TEST MODE

to view

interlock switch status.

1.

PS

M - Primary and/or secondary interlock is open (old switch setup).

P

SM - Primary interlock is open (new switch setup).

Verify action of the latch assembly and oven door. When the door
closes, the actuator should freely clear the slot on the flange. When it
strikes the toggle latch, it should rotate smoothly to its closed position.



Actuator doesn’t clear slot: Bend or adjust actuator. If the actuator
is worn or has yielded, replace the actuator.



Toggle doesn’t rotate freely or smoothly: Replace any worn parts.
Clean assembly and re-lubricate all rotating parts. Be sure to grease
the torsion spring (See Figure 30).



Actuator and toggle OK: Check adjustment and wiring on the
interlocks. If adjustment is necessary, see page 38 (old setup) or page
42 (new setup) for the proper adjustment procedure.

2. PS

M – Monitor switch is open (old switch setup).

P

S M – Secondary and/or monitor switch is open (new switch setup).

Verify that the door closes freely and completely.



Door does not close freely: Remove obstructions or readjust the
oven door per the instructions on page 38.



Door closes properly: Readjust the monitor safety switch (old switch
setup)/secondary and monitor (new switch setup) per the
instructions on page 38 (old setup) and 42 (new setup).

THE OVEN DOOR

46

The Convection Circuit

THE CONVECTION CIRCUIT

47

The Convection Circuit provides the high-temperature

airflow required to brown and cook food items.

CONVECTION CIRCUIT COMPONENTS

The following is a description of each component
within the Convection Circuit and how each acts
within the circuit. Figure 37 below shows a block dia­gram of the Convection Circuit.

Main Convection Heater

The main convection heater is an open-coil style
heater rated at 3300 watts at 208 VAC with a resist­ance of 13.11 Ohms. The convection heater
is controlled by the K4 solid state relay.

Convection Motor

The convection motor is a brushless AC switch reluc­tance type. Its top speed is 7100 RPM at 1 HP. The
motor is controlled by a proprietary controller.

Motor Controller (BMSC)

The motor controller is proprietary and will only
operate the convection motor described above. The
motor controller is controlled on command from the
I/O control board and a 0-10VDC speed command
from the I/O control board.

High Limit Thermostat

The high limit thermostat is a 250 VAC, 3-pole,
manual reset thermostat with a trip point of 572ºF
(300ºC). The thermostat, which interrupts power to
both the main convection heater and the IR element,
should never operate during normal oven operation.

FIGURE 37: Convection Circuit Block Diagram

BOTTOM IR CONTROL

MAIN HX CONTROL

SSR

K5 K4

B1B2A1

+24

A2

WH-28

WH-30

RD-19

OT1 - HI-LIMIT

MANUAL RESET

C

OR540

BL510

NC

32

31

C

NC

22

21

C

12

HT520

NC

11

1

HX ELEMENT
3300 WATTS

13.1 OHMS

BOTTOM IR
3000 WATTS

14.4 OHMS

2

BL530

BL500

MOTOR SPINS

L1

COUNTER-CLOCKWISE
FROM BACK

M4 GREEN
M3 WHITE

M2 RED

M1 BLACK

BLWR

MTR

4
3
2
1

200-240

3

VAC IN

2
1

240 VAC
3 PHASE
OUT

BMSC

SPD CMD

GROUND (GREEN)
L2

L1

0-10V

I/O COM

ENABLE

I/O COM

STATUS OK

I/O COM

BR600

L2

RD-24

1

BK-25

2

WH-31

3

BK-32

4
5
6

OR-9

CONVECTION CIRCUIT/BLOWER MOTOR PARTS

Figure 38

102. 101688 Screw, #8 x 1/2” PTH

103. NGC-1081 Cover, Motor

104. 100906 Nut, 1/4”-20, Flange

105. NGC-1025 Assy, Blower Motor

106. NGC-3007 Kit, Fan Blade

107. NGC-1024 Sealing Block, Blower

108. NGC-1023 Clamp, Blower Seal

109. 101688 Screw, #8 x 1/2” PTH

110. NGC-3011 Heater, Convection

111. 100443 Controller, Motor

112. NGC-3005 Relay, K4/K5 SSR

113. 100592 Fuses, F1 and F2 (12 Amp)

114. 102075 High-Limit Thermostat

115. NGC-1043 Gasket, Convection Heater

* If entire motor is needed, order NGC-1025.

If only hardware (e.g., screws, nuts) or seal is
needed, call 800.90

TURBO or [phone].

** Not shown for clarity.

Assembly Notes

1. Cut insulation covering heater as shown.

FIGURE 38: Convection Circuit Assembly and Parts/Item 105 (Blower Motor) Detail

*

**

111

x6

113

112

102

103

104

105

109

110

114

x8

x10

1

1

THE CONVECTION CIRCUIT

48

106

108

107

*
*

Thi
O
1

2. This

Thi
DHHS Feder

To provide continued protection agai
shock,

s device complies with Part 18 of the FC
peration is subject t
. This devic
devic
recei

ved

undes

ired opera

s Ov

en complies with applic

connec

Pour assurer protec
electrique branche
cor

rectem

e may not cause harmful in
e must acc
, including in

al Per

t t
o

ent mise a t

NOTICE:

o the follo

wing conditions:

C Rules.

ept any inter

ter

terference that may cause

ference

fer

tion.

ence

.

for

mance Standard 21 CFR 1030.10.

able sections of

WARNING:

properly gr

ounded outlets only.

nst electr

AVE

ical

RTISSEMENT:

tion

continue contre le choc

z seulement a une prise

err
e.

ISSUE RESOLUTION

F8: Heat Low

Oven Not Warming Up

1. Check that the blower motor is moving air.



Blower motor is not moving air: Check blower motor assembly
and verify motor is stalled. Unplug oven and correct obstruction or
replace motor. (For access to motor shaft, remove top panel.)



Blower motor is moving air: Verify high-limit thermostat is
not tripped. See the high-limit thermostat information below.

High-Limit Thermostat:



Thermostat tripped: Reset and determine why the thermostat
tripped (See Figure 38, Item 114). Look for excess build up of
grease inside the oven or any other source for a fire.



Thermostat is not tripped: Check main convection heater.

1. Convection heater is defective: Unplug oven and replace the
convection heater and verify the K4 SSR (Figure 37) is not
shorted across output.

2. Convection heater OK: Check the K4 SSR.



K4 defective: Unplug oven and replace.



K4 OK: Unplug oven and verify all wiring. Verify P1 voltage on
I/O board is 5.0VDC (+/- 0.02) - see Figure 40, page 54.

F2: Cook Temperature
Low

1. Verify Cook Door Operation.



“Cook Door Open” Message: Verify which switch is not actuating
and readjust. See pages 38-43.



Cook Door OK: Verify high-limit thermostat is not tripped. See
the high-limit thermostat below.

High-Limit Thermostat:



Thermostat tripped: Reset and determine why the thermostat
tripped (See Figure 38, Item 114). Look for excess build up of
grease inside the oven or any other source for a fire.



Thermostat is not tripped: Check main convection heater.

1. Convection heater is defective: Unplug oven and replace the
convection heater and verify the K4 SSR (Figure 37) is not
shorted across output.

2. Convection heater OK: Check the K4 SSR.



K4 defective: Unplug oven and replace.



K4 OK: Unplug oven and verify all wiring. Verify P1 voltage on
I/O board is 5.0VDC (+/- 0.02) - see Figure 40, page 54.

CONVECTION CIRCUIT TROUBLESHOOTING

THE CONVECTION CIRCUIT

49

ISSUE RESOLUTION

F1: Blower Running
Status Bad

1. Verify motor spins freely.



Motor seized: Unplug oven and correct obstruction or replace motor.



Motor spins freely: Verify motor windings (see table below).

2. Verify motor windings are OK. Measure the resistance between
windings and chassis. Unplug oven and replace motor if resistances do
not agree with the values in the table below. If motor is OK, proceed to
step 3, below.

3. Determine if status indicator “A” is highlighted/backlit in

TEST MODE.



“A” is highlighted/backlit.
a. Disconnect control wiring.
b. Ground OR-9 to chassis to remove backlight on “A”.
c. Keeping OR-9 grounded, check terminals on the control wiring

plug for 0-10 VDC control voltage (reference drawing of QC3
plug on schematics (pages 55-63) while incrementing blower
speed in

TEST MODE (see BLOWER SPEED, page 15).

d. If DC voltage is present throughout all speed settings in

TEST

MODE

(see BLOWER SPEED, page 15), replace motor controller. If

not, check harness and/or replace I/O board.

MOTOR WINDING RESISTANCES TABLE

TO FROM

DESCRIPTION EXPECTED RESISTANCE

Black Red Winding (A-B) 2.0 – 2.6 Ohms

Black White Winding (A-C) 2.0 – 2.6 Ohms

Red White Winding (B-C) 2.0 – 2.6 Ohms

Black, White
or Red

Green Windings to Chassis Open

THE CONVECTION CIRCUIT

50

IR Element and Catalytic

Converter

The IR Element and Catalytic Converter provide two

very different, but essential functions.

The IR element provides the bottom browning ­similar to a residual broiler or salamander type
cooking appliance - required for cooking most food
items. The IR element temperature is independently
controlled in each recipe.

The catalytic converter scrubs the air to eliminate
VOCs and grease particulates that are liberated during
the cooking process. It is important to properly care
for the catalyst using only TurboChef

®

Oven Cleaner
(P/N 103180 USA, 103380 Intl) and distilled
water. For more detailed information, see the
catalytic converter section below.

COMPONENTS

IR Element

The IR element - a dual coil type heater - is located
in the bottom of the oven cavity. The first coil is the
heating coil. The second is the IR thermocouple
wire. The heating coil outputs 3000 watts at 208
VAC. The heating coil’s resistance is 14.4 ohms at
room temperature.

The thermocouple coil is a Type K thermocouple
with a resistance of approximately 20 ohms at the
splices located approximately 6 inches from the
heater and 40 ohms measured at the extension wires
at the I/O control board.

The IR element is controlled via the K5 solid state
relay and the IR thermocouple via the I/O control
board.

Catalytic Converter

The catalytic converter, a VOC type catalyst, is locat­ed behind the inside cook cavity wall and is responsi­ble for cleaning the recirculating airflow. The
catalyst functions by substantially lowering the
combustion temperature of grease entrained in
the air path to approximately the same temperature

of the airflow, thus the grease burns and breaks
down into CO

2

and H2O as it passes through the
catalytic converter. The catalyst will operate most
efficiently at temperatures above 475ºF (246ºC).

The catalyst material is very sensitive to certain
chemical compounds. Irreversible damage can occur if
the catalyst is exposed to cleaning chemicals con­taining phosphates, NaOH, silicates, Na and
Potassium Salts. These chemicals are found in most
commercial degreasers and cleaners; therefore, only
TurboChef

®

Oven Cleaner should be used.

CAUTION

: Clean the catalytic converter

with TurboChef

®

Oven Cleaner and rinse
thoroughly with distilled water. Let the catalytic
converter air dry before reinstalling. If TurboChef

®

Oven Cleaner is not available, do not use a substi­tute. Use distilled water only.

IR ELEMENT AND CATALYST REMOVAL

Refer to Figure 39 and the instructions below for
removing the IR element and catalytic converter.

Removing the IR Element

1. Unplug the oven.

2. Disconnect the heater wires going to the EMI

filter and the high-limit thermostat.

3. Locate where the IR element protrudes through

the cook cavity walls and remove the snap rings
(Item 116) using snap ring pliers. Retain snap
rings (Item 116) and washers (Item 117). Figure

41.

4. Locate and remove the microwave shield

(Item 119) by removing the four (4) #8 x 1/2”
sheet metal screws (Item 120).

NOTE

: Some models do not contain item 119.

5. Squeeze the IR element together inside the cook

cavity and pull the IR element from the oven.

IR ELEMENT AND CATALYTIC CONVERTER

51

Removing and Installing the Catalytic Converter

1. Unplug the oven.

2. Remove the IR element. (See above procedure.)

3. Once the IR element has been removed, remove
the catalytic converter clip (Item 121) to access
the catalytic converter. Figure 39.

NOTE

: It may be necessary to remove the
blower motor assembly (see page 48) to get
access to the top of the catalytic converter.
This will allow the catalytic converter to be
pushed down out of the housing. Figure 39.

4. Remove the catalytic converter (Item 122).

5. Inspect the condition of the catalytic converter
and either clean it or install a new one.

CAUTION: Clean catalytic converter using

only TurboChef cleaner (P/N 103180 USA,
103380 Intl). Use of other chemicals will
irreparably damage catalyst.

Installing a New IR Element

1. Unplug the oven.

2. Gently squeeze the new IR element together in
order to get the terminals and lead wires into the
cavity and through the mounting holes.

CAUTION: Do not allow the thermocouple

lead wires to kink. They are solid wire and
will break.

3. Once the IR element is installed, expand the IR
element in order to reinstall the shim washers
(Item 117) and snap rings (Item 116). Figure 39.

NOTE

: Be sure that the snap rings sit in the

grooves on IR element.

4. Reconnect the IR element lead wires to the EMI
filter and the high-limit thermostat.

5. Reconnect the IR thermocouple lead wires
to the thermocouple extension wires – Yellow to
Yellow and Red to Red.

IR ELEMENT AND CATALYTIC CONVERTER PARTS

Figure 39

116. 101312 Snap Ring

117. 102449 Washer, Shim

118. NGC-3003 IR Element

119. NGC-1116 Shield, Microwave

120. 101688 Screw, #8 x 1/2” Sht Metal PTH

121. NGC-1030 Clip, Catalytic Converter

(Non-SBK)

NGC-1233 Clip, Catalytic Converter (SBK)

122. NGC-1012 Catalytic Converter

FIGURE 39: IR Element and Catalytic Converter Assembly

116

x4

117

118

119

120

121

122

119

118

122

IR ELEMENT AND CATALYTIC CONVERTER

52

Schematics and Schematic

Components

FIGURES 40 THRU 45: NGC OVEN SCHEMATICS

Figure 40 I/O Board Schematic
Figure 41 NGC US Schematic
Figure 42 NGC UK Schematic
Figure 43 NGC EW Schematic
Figure 44 NGC ED Schematic
Figure 45 NGC Brazil Schematic

SCHEMATIC PARTS

Line Voltage Components

Capacitor, High Voltage (C1)
Capacitor, High Voltage (C2)
Controller, Motor
Diode, High Voltage (D1)
Diode, High Voltage (D2)
EMI Filter (P/N 100542 USA, UK, Ireland, Brazil,

Japan 1Ph)

EMI Filter (P/N 100545 Europe, Asia, Pacific,

Australia, Japan 3Ph)
Fan 1, Cooling
Fan, Magnetron (Fan 1)
Fuse Holders, F1, F2, and F3
Fuse, F1, 12 Amp
Fuse, F2, 12 Amp
Fuse, F3, 20 Amp
Heater, Convection
Heater, IR Element
Magnetron (M1)
Magnetron (M2)
Motor, Convection
Power Supply, +24VDC (PS)
Relay, K1, Filament
Relay, K2, Anode
Relay, K3, Monitor
Relay, K4/K5, Solid State, K4/K5, Heater/IR
Relay, K6, Voltage
Relay, K7, Magnetron Cooling Fan
Thermostat, OT2, Cooling Fan
Thermostat, OT1, Heater
Transformer, Filament (FT1)
Transformer, Filament (FT2)
Transformer, High Voltage (T1)
Transformer, High Voltage (T2)
Voltage Sensor Module (US ovens only)

Low Voltage Components

Display, VFD
I/O Control Board

Keypad, NGC Oven
Switch, Primary Interlock
Switch, Secondary Interlock
Switch, Monitor Safety
Thermocouple, CC
Thermocouple, EC
Thermostat, Magnetron

Wire Harness Replacement P/Ns

Low Voltage Harness

123. 100185 Old Switch Setup
NGC-1418 New Switch Setup

Line Voltage Harness

124. NGC-1150-1 North America
NGC-1150-2 UK, Ireland, Brazil
NGC-1150-3 Eu, Asia, Pacific, Au, Japan

Magnetron Wire

125. 100186 All NGC Ovens

Power Cord

126. 100187 USA
100194 NGC ED - Europe, Asia, Pacific
100195 UK, Ireland, Brazil
103187 NGC EW- Europe, Asia, Pacific
103195 Australia
NGC-1383 Japan 3Ph
NGC-1390 Japan 1Ph

I/O CONTROL BOARD ITEM IDENTIFICATION AND
TEST POINT LOCATIONS

Figure 40
C9 Capacitor
D6 Diode
J2 40 Pin Connector for LV Harness
J3 3 Pin Connector for VFD Display
J4 14 Pin Connector for Keypad
J5 26 Pin Connector for Display Data
J6 RS-232 Connector (Unused)
P1 Voltage Reference 0-5 VDC RJ11 Connector

for Smart Card Cable

P3 Blower Controller Pin Configuration U15

EPROM Socket

R42 Voltage Reference Adjustment (not available

on some ovens)
R51 Beeper Volume Adjustment
SKP1 Beeper
U19 Erasable EPROM Socket
T1 Magnetron Current Transformer

SCHEMATIC COMPONENTS

53

I/O BOARD SCHEMATIC

54

FIGURE

40: I/O Control Board and Test Point Locations

K6-B (VOLTS MOD OUT) 29 29

P4

P6

J6

J4

IR

CC

40
39

THERMOCOUPLES EC

37
36

38

BMSC (4) (C OM RTN) 32

34
33

35

BMSC (3) (ENABLE OUT) 31

K4 (B-) (CONV OUT) 30

C(+)

IR

A(-)

C(+)

CC

40
39

A(-)

C(+)

EC

37
36

38

32

A(-)

34
33

35

31
30

17

1-9

23

26

27

28

K5 ( -B) BOTTOM IR OUT

K1-B (MAG F IL OUT)

CT

BMSC 0-10V OUT

BMSC CO MM (2)

24

25

20

-24V PS IN

MAG

-24V S&M RTN

-24V P INTER RTN

22
21

J6

19
18

11

14

16
15

+24V PS IN

ASPEN

MAG THERMO SW IN

13
12

VOL T MODUAL IN

8

BMSC SEL

P5

9BMSC (9) (STATUS OK)

SECONDARY (NO) INTER IN

HX STATUS IN 10

5

MONITOR (NO) INTER IN 6

PRIMARY (NO) INTER IN 7

17

23

26

27

28

24

25

20

22
21

19
18

F

11

14

16
15

13
12

8

9

10

5

6

7

2K2-B (MAG OUT)

3

4

1

2

3

4

1

F

FA

FAN
MAG

1

3

4

5

2

5
4

2

3

1

A

B

B

A

B

A

B

A

L

L2

G

EMI

FILTER

INPUT

L

L2

7

1

4

-V

SUPPLY

+V

POWER
24VDC

L

N

K1 FILAMENT

K2 ANODE

K3 MONITOR

K6 VOLTS

6
3

9

8

FAN1 ( C OOLI NG)

NO

C

OT2

120°F

1

3

2 VAC IN

I/O COMMON

I/O COM

200-240

STATUS OK

6
4

5

SPD CMD

ENABLE

I/O COMMON

0-10V

3
2
1

2

1

GREEN

4

3

OUT

240 VAC

3 PHASE

BMSC

MTR

BLWR

NO

C

212°F

NO

212°F

C

2

5

6
3
4

1

9

7

MAG THERMO

SWITCHES

MAG

CT

C2

0.91 uF 0.91 uF

(-) D2 (+) (+) D1 (-)

MAG 1 MAG 2

FT 1

FT 2

FA

SPLICE 1

-24V MAG THEMO SW RTN

F1 F2 F3

HV TRANSFORMERS

1-2 = 208VAC

1-3 = 240VAC

T2 T1

TAPS

RD-19

1

2

121

2

BL100

BR200

BL300

BL110

BL120

BL120

BL130

BL140

BR240

BR210

BR220

BR230

BR240

BR250

BL330

BL335

BR400 BR410

BR400

BR420

BR420

BR430

BL150

BL150

BL155

BL160

BR290

BL150

BR260

BR260

OR270

OR270

BR280

BL155

BR285

OR275

BR280

BL340

OR440

BR450

OR360

BL370

BL355

BL350

M2HV M1HV

M2FC

M1FC

M2CD

M2FA

M1FA

M2F

M1F

VOL TAGE MODULE

BL000
BR000

OR-13

BK-33

OR-13

BK-33

1-3 = 240VAC
1-2 = 208VAC

RD-191 RD-192 RD-193

-24V (VOLT MODULE RTN)

OR-6

3300 WATTS

13.1 OHMS
HX E LEMENT

BOTTOM IR

14.4 OHMS
3000 WATTS

B2

A2

BL500

BL530

B1 A1

K5 K4

HT600

2

22

BL510

12

OR540

32

1

HT520

21

11

31

MANUAL RESET

OT1

-B+

RD-19

PIN1

PIN2

PIN3

PIN5

PIN4

PIN6

RD-19

WH-2

WH-1

WH-27

PIN1

PIN3

PIN4

PIN5

PIN2

PIN6

9

7

1

4

3

6

1

7

9

6
3
4

OR-11

BK-23

RD-16

RD-20

RD-24

BK-25

WH-31

BK-32

OR-9

RD-24

RD-25

WH-31

BK-32

OR-9

BK-20

A

-+

WH-301

WH-28

WH-301

WH-28

OR-61

WH-29

WH-2

WH-27

BK-22

BK-21

OR-61

OR-8
OR-7

OR-11

BK-23

QC1 QC2

M3 WHITE

M2 RED

M1 BLACK

SAFETY INTERLOCKS

BK-16

QC3

ABA B A B A

741

6

3

B

9

528

RELAY ASSY

PINOUT

BL345

BR500

G

K1

K2

K3

K6

1479

6

33

6

97

4

1

7413

6

9

MAG_FAN _RELAY

NC

24V +

WH-1

B

C

A

NO

J

NOT

USED

M1CD

C1

NC

NO

NC

NO

PRIMARY

INTERLOCK

OR-7

C

NO

NC

OR-8

BK-21

BK-22

SWITCH
MONITOR

C

SECONDARY

INTERLOCK

C

OR-61

OR-6

OR-62

CABLE, SMART CARD

SM A RT CARD CONNECTOR

RJ11

RJ11

DRAWING OF 40-PIN CONNEC T OR

EVENS ODDS

DRAWING OF HV TRANSFORM ERS

OR

BL

BR

T2

BL

BR

OR

T1

ALL BLUE WIR ES

F3: 20 AMPS CLASS CC

F2: 12 AMPS CLASS CC

F1: 12 AMPS CLASS CC

ALL OTHER WIRES

LINE-O UT VIEW

DRAWI NG OF 6-P IN

CONNECTOR

124

5

36

SSR

1. SCHEMATIC SH OWS OVEN WITH DOOR OPEN AND WIT HOUT POWER APPL I ED

NOTES:

MAG FAN RELAY

K7

FIGURE

41: NGC (Tornado) Schematic

NGC (US) SCHEMATIC

55

D2 D1

MAG 1 MAG 2

FT2

FT1

BL 14

BL 15
RED 6

RED 5

DO NOT USE

WH-29

NC

C

C

OR-62

SAFETY INTERLOCKS - NEW SETUP

NC

INTERLOCK

PRIMARY

MONIT OR

SWITCH

C

NC

NO

SECONDARY

BK-22

BK-21

NO

OR-7

OR-8

OR-61

INTERLOCK

NO

OR-6

CAB LE, S M A R T CARD

SM ART CARD CONNECTOR

RJ11

RJ11

F3: 20 AMPS CLASS C C

F1: 12 AMPS CLASS C C
F2: 12 AMPS CLASS C C

SSR

14

CONNECTOR

DRA WING OF 6-PI N

3

25

6

DRAWING OF 40-PIN CONNECTOR

ODDSEVENS

1. SCHEMATIC SHOWS OVEN WITH DOOR OPEN AND WITHOUT POWER APPLIED

NOTES:

K7

PRIMARY

SAFETY INT ERLOCKS - OLD SETUP

BK-21

SECONDARY

NO

NC

C

SWITCH

NO

MONIT OR

BK-21

OR-8

OR-7

NC

C

NO

BK-22

NC

C

OR-61

WH-29

24V +

MAG_FAN_RELAY

NONCC

A

B

QC1

OR-11

BK-23

QC2

NO

NC

MAG THERMO

SWITCHES

C

212°F

NC

C

212°F

NO

K7 MAG FAN RELAY 29 29

P4

P6

J6

J4

IR

CC

40
39

THERMOCOUPLES EC

37
36

38

BMS C (4 ) (COM RTN) 32

34
33

35

B MS C (3) (E NA BLE OUT ) 31

K4 (B -) (CONV OUT) 30

C(+)

IR

A(-)

C(+)

CC

40
39

A(-)

C(+)

EC

37
36

38

32

A(-)

34
33

35

31
30

17

1-9

23

26

27

28K5 (-B) BOT TOM IR OUT

K1-B (MAG FIL OUT)

CT

BMSC 0-10V OUT

B M S C C OMM (2)

24

25

20

-24V PS IN

MAG

-24V S&M RTN

-24V P I N T E R RTN

22
21

J6
19
18

11

14

16
15

+24V PS IN

ASPEN

MAG THERMO SW IN

13
12

VOL T MODU AL IN

8

BMSC SEL

P5

9B MS C (9) (S TA TUS OK)

SECONDARY (NO) IN TER IN

HX STATUS IN 10

5

MONITOR (NO) INTER IN 6

PRI MARY (NO) INTER IN 7

17

23

26

27

28

24

25

20

22
21

19
18

F

11

14

16
15

13
12

8

9

10

5

6

7

2K2-B (MAG OUT)

3

4

1

2

3

4

1

F

FA

FAN
MAG

1

3

4

2

4
3

2

1

A

B

BA

B

A

EMI

FILTER 1-PHASE

-V

SUPPLY

+V

POWER
24VDC

L

N

K1 FILAMENT

K2 ANODE

K3 MONITOR

EC FAN

NO

C

OT2

120°F

1

3

2

VAC IN

I/O COMMON

I/O COM

200-240

STATUS OK

6
4

5

SP D CMD

ENABLE

I/O COMMON

0-10V

3
2
1

2

1

M1 BLK

4

3

OUT
240 VAC

3 PHASE

BMSC

MTR

BLWR

4
2
3

1

6

5

MAG

CT

1.13 uF

(-) (+) (+) (-)

FA

OR-62

SPLICE 1

-24V MAG TH E MO S W RTN

F1

F2 F3

HV TRANSFORMERS

1-2 = 230V A C

T2

T1

TAPS

RD-19

1

2

1

2

1

2

BLK 15

BLK 22

BL 35

BLK 19

BLK 39

M2HV M1HV

M2FC

M1FC

M1CD

M2CD

M2FA

M1FA

M2F

M1F

1-2 = 230V A C

RD-191 RD-192

-24 V (V OL T MODULE RTN)

OR-6

3300 WATTS

13.1 OHMS

HX ELEMENT

BOTTOM IR

14.4 OHMS
3000 WATTS

B2

A2

BR 27

B1 A1

K5 K4

2

22

BR 30

12

RED 29

32

1

HT 38

21
11

31

MANUA L RESET

OT1

-B+

RD-19

PIN1

PIN2

PIN3

PIN5

PIN4

PIN6

RD-19

WH-2

WH-27

PIN1

PIN3

PIN4

PIN5

PIN2

PIN6

6

5

1

3

2

4

1

5

6

4
2
3

OR-11

BK-23

RD-16

RD-16

RD-24

BK-25

WH-31

BK-32

OR-9

RD-24

RD-25

WH-31

BK-32

OR-9

BK-20

A

-+

WH-301

WH-28

WH-301

WH-28

OR-61

WH-2

WH-27

BK-22

BK-21

OR-61

OR-8
OR-7

M2 RED

M3 W HITE

OR-6

OR-10

GREEN

BK-20

QC3

135

AB

642

A53

1

42B

6

A53

1

4

2B6

RE LAY ASSY

PINOUT

BLK 20

G

K1

K2

K3

L1 N

L1 N

BL 36

BL 37

BL 33 BL 34

BLK 40

RED 7

BL 9

RED 2

RED 1

BL 8

RED 3

BL 10

BLK 23

BL 26

BL 11

RED 4

BL 20

RED 24

RED 28

HT 43

BLK 25

BL 42

BL 16

BROWN

BLUE

230VAC, 1Ø

3 WIRE INPUT

GRN/YEL

L1N

40VSK6

MAG CT

IR ELE

AUX CT

HX CT

L1 N

LOAD DIAGRAM

C2 C1

1.15 uF

1.13 uF

1.15 uF

FIGURE

42: NGCUK (Tornado) Schematic

NGC (UK) SCHEMATIC

57

K7 MAG FAN RELAY 29 29

P4

P6

J6

J4

IR

CC

40
39

THERMOCOUPLES

EC

37
36

38

BMSC (4 ) (COM RTN) 32

34
33

35

BMSC (3 ) (ENABLE OUT ) 31

K4 (B-) (CONV OUT) 30

C(+)

IR

A(-)

C(+)

CC

40
39

A(-)

C(+)

EC

37
36

38

32

A(-)

34
33

35

31
30

17

1-9

23

26

27

28

K5 (-B) BOTTOM IR OUT

K1-B (MAG FIL OUT)

CT

BMSC 0-10V OUT

BMSC COMM (2)

24

25

20

-2 4V PS IN

MAG

-24V S&M RTN

-24V P INTER RT N

22
21

J6
19
18

11

14

16
15

+2 4V P S IN

ASPEN

MA G THERMO SW IN

13
12

VOL T MODUAL IN

8

BMSC SEL

P5

9BMSC (9) (STATUS OK)

SECONDARY (NO) IN TER IN

HX ST AT US IN 10

5

MONITOR (NO) INTER IN 6

PRIMARY (NO) INTER IN 7

17

23

26

27

28

24

25

20

22
21

19
18

F

11

14

16
15

13
12

8

9

10

5

6

7

2K2-B (MAG OUT)

3

4

1

2

3

4

1

FFA

FAN
MAG

1

3

4

2

4
3

2

1

A

B

BA

B

A

EMI FILTER

3-PHASE 5 WIRE WYE

-V

SUPPLY

+V POWER

24VDC

L

N

K1 FILAMENT

K2 ANODE

K3 MONITOR

EC FAN

NO

C

OT2

120°F

1

3

2

VAC IN

I/O COMMON

I/O COM

200-240

ST ATUS OK

6
4

5

SP D CMD

ENABLE

I/O COMMON

0-10V

3
2
1

2

1

M1 BLK

4

3

OUT
240 VAC

3 PHASE

BMSC

MTR

BLWR

6
3

4
1

9

7

MAG

CT

1.15 uF

(-) (+) (+) (-)

FT 1

FT 2

FA

OR-62

SPLIC E 1

-2 4 V MAG THEM O SW RTN

F1 F2 F3

HV TRANSFORMERS

1-2 = 230VAC

T2

T1

TAPS

RD-19

1

2

121

BLK 15

BLK 22

BL 35

BLK 19

BLK 39

M2HV M1HV

M2FC

M1FC

M1CD

M2CD

M2FA

M1FA

M2F

M1F

1-2 = 230VAC

RD-191 RD-192

-24 V (V OLT MODULE RT N)

OR-6

3300 WATTS

13.1 OHMS

HX ELEMENT

BOTTOM IR

14.4 OHMS
3000 WATTS

B2

A2

BR 27

B1 A1

K5 K4

2

22

BR 30

12

RED 2 9

32

1

HT 38

21

11

31

MAN UAL RESET

OT1

-B+

RD-19

PIN1

PIN2

PIN3

PIN5
PIN4

PIN6

RD-19

WH-2

WH-27

PIN1

PIN3

PIN4

PIN5

PIN2

PIN6

9

7

1

4

3

6

1

7

9

6
3
4

OR-11

BK-23

RD-16

RD-16

RD-24

BK-25

WH-31

BK-32

OR-9

RD-24

RD-25

WH-31

BK-32

OR-9

BK-20

A

-+

WH - 301

WH-28

WH-301

WH-28

OR-61

WH-2

WH-27

BK-22
BK-21

OR-61

OR-8
OR-7

M2 RED

M3 WHITE

OR-6

OR-10

GREEN

BK-20

QC3

147

AB

963

A74

1

6

3

B

9

A74

1

63B

9

RELA Y AS SY

PINOUT

BLK 20

G

K1

K2

K3

L1 L3 NL2

N

L1 L2

L3

BL 36

BL 37

BL 33 BL 34

BLK 40

RED 7

BL 9

RED 2

RED 1

BL 8

RED 3

BL 10

BLK 23

BL 26

BL 11

RED 4

BL 20

RED 2 4

RED 2 8

HT 43

BLK 25

BL 42

BL 16

BLK

BLK

BRN

BLU

380-415, 3Ø

5 W IRE INPUT

GRN

N

L3

L2

L1

L1

L2

DIAGRAM

LOAD

N

AUX CT

IR ELE

MAG CT

HX CT

L3

D2 D1

1.13 uF

1.15 uF

1.13 uF

C2 C1

MAG 1 MAG 2

2

BL 14

RED 5

DO NOT USE

BL 15
RED 6

WH-29

C

PRIMARY

SECONDARY

BK-22

OR-7

BK-21

INTERLOCK

NC

C

NO

OR-6

OR-8

OR-61

C

INTERLOCK

OR-62

NO

NO

NC

SAFETY INTERLOCKS - N EW SE TUP

MONITOR

SWITCH

NC

CABLE, SMART CARD

SMART CARD CON NEC T O R

RJ11

RJ11

SSR

DRAWING OF 40- PIN CONNECT O R

ODDSEVENS

F2: 12 AMP S CLASS CC

F1: 12 AMP S CLASS CC
F3: 20 AMP S CLASS CC

14

3256

CONNECTOR
DRAWING OF 6-PIN

1. SC H EM ATIC S HOWS OVEN WI T H D OO R OPEN AND WITHOUT POWER APPLIED

NOTES:

K7

PRIMARY

SAFETY INTERLOCKS - O L D SETUP

BK-21

SECONDARY

NO

NC

C

SWITCH

NO

MONITOR

BK-21

OR-8

OR-7

NC

C

NO

BK-22

NC

C

OR-61

WH-29
24V +

A

B

QC1

OR-11

BK-23

QC2

NO

NC

MAG THERMO

SWITCHES

C

212°F

NC

C

212°F

NO

FIGURE

43: NGCEW (Tornado) Schematic

NGC (EW) SCHEMATIC

59

K7 MAG FAN RELAY 29 29

P4

P6

J6

J4

IR

CC

40
39

THERMOCOUPLES EC

37
36

38

BMSC (4 ) (COM RTN) 32

34
33

35

BMSC (3 ) (ENABLE OUT ) 31

K4 (B-) (CONV OUT) 30

C(+)

IR

A(-)

C(+)

CC

40
39

A(-)

C(+)

EC

37
36

38

32

A(-)

34
33

35

31
30

17

1-9

23

26

27

28

K5 (-B) BOTTOM IR OUT

K1-B (MAG FIL OUT)

CT

BMSC 0-10V OUT

BMSC COMM (2)

24

25

20

-2 4V PS IN

MAG

-24V S&M RTN

-24V P INTER RT N

22
21

J6
19
18

11

14

16
15

+24V PS IN

ASPEN

MA G THERMO SW IN

13
12

VOL T MODUAL IN

8

BMSC SEL

P5

9BMSC (9) (STATUS OK)

SECONDARY (NO) IN TER IN

HX ST AT US IN 10

5

MONITOR (NO) INTER IN 6

PRIMARY (NO) INTER IN 7

17

23

26

27

28

24

25

20

22
21

19
18

F

11

14

16
15

13
12

8

9

10

5

6

7

2K2-B (MAG OUT)

3

4

1

2

3

4

1

FFA

FAN
MAG

1

3

4

2

4
3

2

1

A

B

B

A

B

A

EMI

FILTE R 3-PH AS E 5 WI RE WYE

-V

SUPPLY

+V

POWER
24VDC

L

N

K1 FILAMENT

K2 ANODE

K3 MONITOR

EC FAN

NO

C

OT2

120°F

1

3

2 VAC IN

I/O COMMON

I/O COM

200-240

ST ATUS OK

6
4

5

SP D CMD

ENABLE

I/O COMMON

0-10V

3
2
1

2

1

M1 BLK

4

3

OUT
240 VAC

3 PHASE

BMSC

MTR

BLWR

6
3
4

1

9

7

MAG

CT

1.13 uF

(-) (+) (+) (-)

FA

OR-62

SPLIC E 1

-24 V MAG TH EMO SW RTN

F1

F2

F3

HV TRANSFORMERS

1-2 = 230VAC

T2

T1

TAPS

RD-19

11

2

1

BLK 15

BLK 22

BL 35

BLK 19

BLK 39

M2HV M1HV

M2FC

M1FC

M1CD

M2CD

M2FA

M1FA

M2F

M1F

1-2 = 230VAC

RD-191 RD-192

-24 V (V OLT MODULE RT N)

OR-6

3300 WATTS

13.1 OHMS

HX ELEMENT

BOTTOM I R

14.4 OHMS
3000 WATTS

B2

A2

BR 27

B1 A1

K5 K4

2

22

BR 30

12

RED 2 9

32

1

HT 38

21

11

31

MAN UAL RESET

OT1

-B+

RD-19

PIN1

PIN2

PIN3

PIN5
PIN4

PIN6

RD-19

WH-2

WH-27

PIN1

PIN3

PIN4

PIN5

PIN2

PIN6

9

7

1

4

3

6

1

7

9

6
3
4

OR-11

BK-23

RD-16

RD-16

RD-24

BK-25

WH-31

BK-32

OR-9

RD-24

RD-25

WH-31

BK-32

OR-9

BK-20

A

-+

WH - 301

WH-28

WH-301

WH-28

OR-61

WH-2

WH-27

BK-22
BK-21

OR-61

OR-8
OR-7

M2 RED

M3 WHITE

OR-6

OR-10

GREEN

BK-20

QC3

147

AB

963

A B A B

RELA Y AS SY

PINOUT

BLK 20

G

K1

K2

K3

L1

L3

NL2

NL1 L2 L3

BL 36

BL 37

BL 33 BL 34

BLK 40

RED 7

BL 9

RED 2

RED 1

BL 8

RED 3

BL 10

BLK 23

BL 26

BL 11

RED 4

BL 20

RED 2 4

RED 2 8

HT 43

BLK 25

BL 42

BL 16

BLK

BLK

BRN

230VA C, 3Ø

4 W IRE INPUT

GRN

L3

L2

L1

741

963

741

963

L1

L3

L2

MW CT

AUX C T

IR ELE

HX CT

LOAD

DIAGRAM

C2 C1

1.15 uF

1.15 uF

1.13 uF

MAG 1 MAG 2

D1D2

FT2

FT1

BL 14

RED 5

DO NOT USE

BL 15
RED 6

2

2

WH-29

NC

C

NC

SAFETY INTERLOCKS - N EW SE TUP

PRIMARY

INTERLOCK

MONITOR

SWITCH

C

NC

NO

SECONDARY

BK-22

NO

C

OR-7

BK-21

INTERLOCK

NO

OR-62

OR-6

OR-8

OR-61

CABLE, SMART CARD

SMART CARD CON NEC T O R

RJ11

RJ11

SSR

DRAWING OF 40- PIN CONNECT O R

ODDS

EVENS

DRAWING OF 6-PIN

CONNECTOR

41

2 5

36

F3: 20 AMP S CLASS CC

F1: 12 AMP S CLASS CC
F2: 12 AMP S CLASS CC

1. SC H EM ATIC S HOWS OVEN WI T H D OO R OPEN AND WITHOUT POWER APPLIED

NOTES:

K7

PRIMARY

SAFETY INTERLOCKS - O L D SETUP

BK-21

SECONDARY

NO

NC

C

SWITCH

NO

MONITOR

BK-21

OR-8

OR-7

NC

C

NO

BK-22

NC

C

OR-61

WH-29
24V +

A

B

QC1

OR-11

BK-23

QC2

NO

NC

MAG THERMO

SWITCHES

C

212°F

NC

C

212°F

NO

FIGURE

44: NGCED (Tornado) Schematic

NGC (ED) SCHEMATIC

61

FIGURE

45: NGC Brazil (Tornado) Schematic

NGC (BRAZIL) SCHEMATIC

63

Service Parts and

Illustrations

SERVICE PARTS AND ILLUSTRATIONS

65

FIGURE 7: NGC (TORNADO) CONTROL SYSTEM

Chapter 4: The Control System - Page 13

GROUND

STATUS OK

I/O COM

1

2

OUT

240 VAC
3 PHASE

3

4

4

6

5

2

1

3

I/O COM
ENABLE

200-240

VAC IN

SPD

2
3

0-10V

1

BMSC

K1

MECH

RELAY

+ 24 VDC -

RELAY

MECH

K2

RELAY

MECH

K3

SSR

DUAL

BOARD

CONTROL

I/O

KEYPAD

VFD

DISPLAY

IR THERMOCOUPLE

EC THERMOCOUPLE

CC THERMOCOUPLE

SUPPLY

POWER

24VDC

IR ELEMENT COMMAND

CONVECTION HEATER COMMAND

MAG HV

COMMAND

COMMAND

MAG FILAMENT

MONITOR
INTERLOCK

INTERLOCK

INTERLOCK

+24VDC

+24VDC

+24VDC

COMMON

CMD

COMMON

+24VDC

PRIMARY SWITCH

SECONDARY SWITCH

K6

MECH
RELAY

+ 24 VDC - + 24 V DC - + 24 VDC -

VOLTAGE

COMMAND

COMMON

VOLTAGE INPUT

VOLTAGE

K7

RELAY

- 24 VDC +

MAGNETRON COOLING FAN COMMAND

PRIMARY SWITCH

NC

NO

C

NC

C

NO

SECONDARY SWITCH

MONITOR SWITCH

NC

C

NO

3(+) 4(-)

3(+) 4(-)

+V

-V

L

N

A (-)
C (+)

C (+)

A (-)

C (+)

A (-)

12

14
14

2

1

14

21

14

2

1

12

25 26

2

1

25 26

2

1

1
2

25 26

25 26

+24VDC

K5

K4

(U.S. ONLY)

FOR MORE DETAI L, SEE FIGURE 37

SENSOR

SERVICE PARTS AND ILLUSTRATIONS

66

FIGURE 17: CONTROL SYSTEM PANEL ENCLOSURE AND PARTS

Chapter 4: The Control System - Page 20

CONTROL SYSTEM PANEL PARTS

Figure 17.

1. NGC-1040 Cover, Keypad/Display, Std
NGC-1209 Cover, Keypad/Display, SBK

2. 102960 Nut, 4-40, Stainless

3. 100508 Smart Card, Blank
(Varies)* Smart Card, Programmed*

4. NGC-3023 Display Svc Kit (includes

Items 5, 6, and 7)

5. 101954 Spacer, 1/2” Lg, Aluminum

6. 100193 3-Pin Power Cable

7. 100184 26-Pin Ribbon Cable

8. NGC-1110-1 Keypad, NGC, Standard
NGC-1110-2 Keypad, NGC, SWY
NGC-1110-3 Keypad, NGC, SBK
NGC-1110-4 Keypad, NGC, OUT

9. 100506 Smart Card Reader

10. 100182 Smart Card Reader Cable

* Contact TurboChef (800.90

TURBO or

+1 214.379.6000) for more info/part numbers.

1

2

3

4

5

6

7

10

9

8

67

SERVICE PARTS AND ILLUSTRATIONS

FIGURE 18: MONITOR CIRCUIT - SHOWN IN FAILSAFE STATE

Chapter 5: The Microwave System - Page 25

11

12

13

15

15

16

14

17

18

19

20212223

15. NGC-3061-1 Filament Transformer (2 per
oven, 1 per kit) - USA, S. Korea

NGC-3061-2 Filament Transformer (2 per

oven, 1 per kit) - Europe, Asia­Pacific, Latin America

NGC-3061-3 Filament Transformer (2 per

oven, 1 per kit) - Japan

16. 100083 Mag Cooling Fan

17. 101273 K3 Monitor Relay

18. 101273 K2 High Voltage Relay

19. 101273 K1 Filament Relay

20. 100599 F3 Fuse - 20 Amp

21. NGC-3015 Magnetron (2 per oven, 1 per kit)

22. NGC-3017 Wave Guide (Rear)

23. NGC-3016 Wave Guide (Front)

* See Comprehensive Part List, page 79.

11. NGC-3062-1 HV Transformer (2 per oven, 1 per kit)
USA, Latin America, Korea

NGC-3062-2 HV Transformer (2 per oven, 1 per kit)

Europe, Asia-Pacific

NGC-3062-3 HV Transformer (2 per oven, 1 per kit)

Japan

12. NGC-3020 High Voltage Capacitor (2 per oven,
1 per kit) - USA, Latin America, Korea

NGC-3020-2 High Voltage Capacitor (2 per oven,

1 per kit) - Europe, Asia-Pacific,
Japan 50 Hz

100207 High Voltage Capacitor (2 per oven,

1 per kit) - Japan 60 Hz

13. 100481 High Voltage Diode (x2)

14. Mag Fan Relay, Generic

NGC-3030-1 North America
NGC-3030-4 Europe, Asia-Pacific MPh
NGC-3030-7 Europe Single Phase
NGC-3030-12 Brazil Single Phase

Mag Fan Relay, SWY

NGC-3030-2 North America
NGC-3030-6 Europe, Brazil Single Phase
NGC-3030-9 Europe, Asia-Pacific MPh

Mag Fan Relay, SBK

NGC-3030-3 North America
NGC-3030-13 Europe, Brazil Single Phase
NGC-3030-14 Indiana/North Carolina
NGC-3030-15 Europe, Asia-Pacific MPh

Mag Fan Relay, Additional*

FIGURE 20: MICROWAVE SYSTEM PARTS

Chapter 5: The Microwave System - Page 27

LINE VOLTAGE

(L1)

LINE VOLTAGE

(L2)

F3 FUSE
20 AMP

(BLOWN)

+24 VDC

+24 VDC

K2 HV
RELAY

1

7

4
3

9

6

A

B

K3 MONITOR

RELAY

7

9

A

B

1
4
3
6

CONTROL

T1

HV TRANSFORMER

3

1

2

T2

HV TRANSFORMER

1

2

3

MONITOR SWITCH

(OPEN)

NC

NO

CDM

C

PRIMARY AND SECONDARY

INTERLOCKS (CLOSED)

CONTROL

CONTROL

CDS

NC

C

NO

CDP

NC

C

NO

29

31

30

32

33

34

35

36

37

68

SERVICE PARTS AND ILLUSTRATIONS

FIGURE 21: MICROWAVE SYSTEM PARTS

Chapter 5: The Microwave System - Page 27

Microwave System Parts

24. 100186 Magnetron Wire

25. NGC-3015 Magnetron

26. 102070 Magnetron Thermostat

27. NGC-1163 Insulator, Adhesive

28. 100684 Screw #6 Sheet Metal

Wave Guide/Wave Guide Cover Parts

29. NGC-3036 Kit, Wave Guide Cover (Includes

Item 31 and sealant)

30. 101666 Screws, #8-32 x 1/2, Cap

31. 101701 Screws, #8, SST

32. NGC-1047

Support, Frame

33. 102809

Screws, #8-32 x 3/8” CSK (100

º

)

34.

NGC-3017 Assy, Wave Guide, Rear

35. NGC-3015 Magnetron, Rear

36. NGC-3015

Magnetron, Front

37. NGC-3016

Assy, Wave Guide, Front

FIGURE 22: WAVE GUIDE COVER/WAVE GUIDE REMOVAL AND REPLACEMENT

Chapter 5: The Microwave System - Page 29

F

FA

FILAMENT AND HIGH
VOLTAGE TERMINALS

COOLING
FINS

(ORG)

(BLK)

ANTENNA

25

26

27

28

24

SERVICE PARTS AND ILLUSTRATIONS

FIGURE 24 & 25: HIGH VOLTAGE DIODE AND MAGNETRON

Chapter 5: The Microwave System - Page 32

69

Cook Door Parts

38. 102809 #8-32 x 3/8” PFH CSK

39. NGC-3067 Assy, Oven Door
(Traditional)

NGC-3067-2 Assy, Oven Door

(SBK)

40. NGC-1061 Hinge Block

41. 102804 Right Hinge

42. 102805 Left Hinge

43. 101381 #10-32 x 1/2” Hex SS

44. 102140 #10 Flat

45. 102350 #10 Split Lock

46. 101191 Cap, Hole

38

39

40

41

42

43

44

45

46

FIGURE 26: OVEN DOOR REMOVAL AND PARTS

Chapter 6: The Oven Door - Page 37

FFA

FILAMENT AND
HIGH VOLTAGE
TERMINALS

ANTENNA

70

Primary and Secondary Interlock Switch Parts

47. NGC-1076-2 Actuator, Door

48. 102809 Screw, #8-32 x 3/8” 100Þ CSK

49. 102921 Screw, #8-32 x 3/8”

50. 101557 Screw, #4-40 x 1 1/4”

51. 102012 Interlock Switches

52. NGC-3033 Assy, Door Switch*

*See Figure 32 for Assy Detail.

SWITCH GAP

= 0.020”

4950

51

52

TOGGLE TO BE LEVEL

OR NEARLY LEVEL

APPLY HI-TEMP
GREASE TO AREA

48

47

58

61

57

53

63

59

54

60

55

62

56

x2

FIGURE 30: DOOR SWITCH ASSEMBLY AND PARTS

Chapter 6: The Oven Door - Page 41

SERVICE PARTS AND ILLUSTRATIONS

FIGURE 29: PRIMARY AND SECONDARY INTERLOCKS ADJUSTMENT AND PARTS - OLD SWITCH SETUP

Chapter 6: The Oven Door - Page 40

Door Switch Parts

53. NGC-1072 Bracket Latch

54. 102012 Switch, Micro, 0.1A/125VAC

55. NGC-1087 Spring Door Latch

56. NGC-1073 Toggle, Latch

57. 101119 Pin, Clevis, ø3/16 x 1” Lg

58. 100059 Bearings, Bronze,
3/16ID x 5/16OD x 1/4” Lg

59. 101557 Screw, #4-40 x 1.25” Lg,
PPHD, CRES

60. 102921 Screw, #8-32 x 3/8”, Internal
Tooth Sems, PPHD, SS

61. NGC-1126 Plate, Door Switch

62. NGC-3006 Grease, USDA H-1, Food Grade

63. 101296 Ring, E-clip

SERVICE PARTS AND ILLUSTRATIONS

71

Monitor Safety Switch Parts

64. 102804 Hinge, Right

65. 102012 Switch, Limit, Micro

66. NGC-1126 Plate, Door Switch

67. 101912 Standoff, #8-32F/Fx1 in S

68. 102921 Screw, #8-32 x 3/8”

69. 102902 Screw, 4-40 x 5/8”

FIGURE 31: MONITOR SWITCH ADJUSTMENT AND ASSEMBLY - OLD SWITCH SETUP

Chapter 6: The Oven Door - Page 41

68

67

68

64

66

68

67

69

65

REF

x2

75

71

72

73

74

APPLY HI-TEMP
GREASE TO AREA

70

FIGURE 32: PRIMARY INTERLOCK ADJUSTMENT AND PARTS - NEW SWITCH SETUP

Chapter 6: The Oven Door - Page 42

Primary Safety Switch Parts

70. 102809 Screw, #8-32 x 3/8” 100Þ CSK

71. 102921 Screw, #8-32 x 3/8”

72. 101555 Screw, #4-40 x 3/4”

73. 102012 Interlock Switch

74. NGC-3033 Assy, Door Switch*

75. Adjustment Tools (included with Item 74)
NGC-1215 Door Switch Gauge
NGC-1340 Shim Tool, 0.060”
NGC-1344 Shim Tool, 0.030”

76. NGC-1169-1 Shim, 0.030”
NGC-1169-2 Shim, 0.045”

76

72

SERVICE PARTS AND ILLUSTRATIONS

79

80

82

x2

83

x2

78

81

82

77

80

82

81

FIGURES 33 AND 34: SECONDARY AND MONITOR SWITCH ADJUSTMENT AND ASSEMBLY - NEW SWITCH SETUP

Chapter 6: The Oven Door - Page 43

Secondary and Monitor Safety Switch Parts

77. 102804 Hinge, Right

78. 102012 Switch, Limit, Micro (x2)

79. NGC-1126 Plate, Door Switch

80. 101914 Standoff, #8-32 F/F x 1”, 5/16” DIA

81. 101915 Standoff, #8-32 M/F x 5/16”, 1/4” DIA
(attached to outside of Item 80.)

82. 102921 Screw, #8-32 x 3/8”

83. 101558 Screw, 4-40 x 1.125”

SERVICE PARTS AND ILLUSTRATIONS

73

Oven Door Parts

84. NGC-3067* Door, NGC, Generic*

NGC-3067-2* Door, NGC, SBK*

85. NGC-3021 Kit, Shunt Plate

86. NGC-1061 Hinge Block

87. 102750 Handle, Door, Generic

NGC-1216 Handle, Door, SBK

88. NGC-1076-2 Actuator, Door

89. NGC-1132 Shim, Door Latch

90. 102945 Bolt, 1/4”-20 x 1.00

91. NGC-1138 Label, Precaution

92. 102809 #8-32 x 3/8” CSK 100°

93. NGC-1165 Label, Caution Empty

94. NGC-1125-1 Door Insulation 1

NGC-1125-2 Door Insulation 2

95. NGC-1127 Channel, Door Handle

96. 102748 Screw, #8-32 x 3/8”, Torx
Security

97. 101688 Screw, #8 x 1/2” PTH

98. 102698 Tape, Aluminum

99. NGC-1155 Name Plate, TurboChef

100. 101293 Nut, Push, 1/8”

101. NGC-1170 Label, Service

* Includes items 85 - 101.

FIGURE 35: OVEN DOOR ASSEMBLY

Chapter 6: The Oven Door - Page 44

85

84

86

x2

88

89 96

x2

87

95

x2

93

91

x6

94

98

90

92

AR

97

x17

99

101

x2

100

n
ta

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EXPOSURE TO EXCESSIVE MICROW
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800-908-8726

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EXPOSURE TO EXCESSIVE M
PRECAUTIO

FIGURE 37: CONVECTION CIRCUIT BLOCK DIAGRAM

Chapter 7: Convection Circuit - Page 47

74

SERVICE PARTS AND ILLUSTRATIONS

MOTOR SPINS
COUNTER-CLOCKWISE
FROM BACK

BLWR

MTR

BOTTOM IR CONTROL

MAIN HX CONTROL

+24

SSR

K5 K4

A2

B1B2A1

BL530

BL500

L1

M4 GREEN
M3 WHITE

M2 RED

M1 BLACK

4
3

240 VAC

2

3 PHASE

1

OUT

200-240

3

VAC IN

2
1

WH-28

WH-30

RD-19

BMSC

SPD CMD

STATUS OK

GROUND (GREEN)
L2

L1

OR540

BL510

0-10V

I/O COM

ENABLE

I/O COM

I/O COM

1
2
3
4
5
6

OT1 - HI-LIMIT

MANUAL RESET

C

NC

32

31

C

NC

22

21

C

NC

12

11

RD-24
BK-25

WH-31

BK-32

OR-9

HT520

L2

HX ELEMENT
3300 WATTS

13.1 OHMS

1

BOTTOM IR
3000 WATTS

14.4 OHMS

2

BR600

SERVICE PARTS AND ILLUSTRATIONS

75

Convection Circuit Parts

102. 101688 Screw, #8 x 1/2” PTH

103. NGC-1081 Cover, Motor

104. 100906 Nut, 1/4”-20, Flange

105. NGC-1025 Assy, Blower Motor

106. NGC-3007 Kit, Fan Blade

107. NGC-1024 Sealing Block, Blower

108. NGC-1023 Clamp, Blower Seal

109. 101688 Screw, #8 x 1/2” PTH

110. NGC-3011 Heater, Convection

111. 100443 Controller, Motor

112. NGC-3005 Relay, K4/K5 SSR

113. 100592 Fuses, F1 and F2 (12 Amp)

114. 102075 High-Limit Thermostat

115. NGC-1043 Gasket, Convection Heater

* If entire motor is needed, order NGC-1025.

If only hardware (screws, nuts) or seal is needed,

contact 800.90

TURBO or [phone].

** Not shown for clarity.

FIGURE 38: CONVECTION CIRCUIT ASSEMBLY AND PARTS

Chapter 7: Convection Circuit - Page 48

111

x6

113

112

102

103

104

105

109

110

114

x8

x10

108

107

*
*

*

**

106

Thi

s device complies with Part 18 of the FCC Rules.

Operation is

1. This devic
subj

NOTICE:

2. This devic

e

ct to the following conditions:
e may not cause harmful in
e must acc

recei
ved
undesired operation.

, including in

ept any inter
Thi
s Ov

ter

ter
DHHS Federal Per

en complies with applic

ference

fer

ference that may cause

ence

.
for
mance Standard 21 CFR 1030.10.

able sections of

To pro

vide con

shock,

connec

tinued protection against electr

WARNING:

t t
o prop

erly grounded outlets only.
Pour assurer protec
electrique branche

AVE

ical

cor

RTISSEMENT:

rectem

tion con

ent mise a t

z seulement a un

tinue contre le cho

err

e.

e prise

c

IR Element and Catalytic Converter Parts

116. 101312 Snap Ring

117. 102449 Washer, Shim

118. NGC-3003 IR Element

119. NGC-1116 Shield, Microwave

120. 101688 Screw, #8 x 1/2” Sht Metal PTH

121. NGC-1030 Clip, Catalytic Converter
(Non-SBK)

NGC-1233 Clip, Catalytic Converter

(SBK)

122. NGC-1012 Catalytic Converter

FIGURE 39: IR ELEMENT AND CATALYTIC CONVERTER PARTS AND ASSEMBLY

Chapter 8: IR Element and Catalytic Converter - Page 52

116

x4

117

118

119

120

121

122

119

118

122

76

SERVICE PARTS AND ILLUSTRATIONS

Wire Harness Replacement P/N

Low Voltage Harness

123. 100185 Old Switch Setup
NGC-1418 New Switch Setup

Line Voltage Harness

124. NGC-1150-1 North America
NGC-1150-2 UK, Ireland, Brazil
NGC-1150-3 Eu, Asia, Pacific, Au, Japan

Magnetron Wire

125. 100186 All NGC Ovens

Power Cord

126. 100187 USA
100194 NGC ED - Europe, Asia, Pacific
100195 UK, Ireland, Brazil
103187 NGC EW- Europe, Asia, Pacific
103195 Australia
NGC-1383 Japan 3Ph
NGC-1390 Japan 1Ph

SERVICE PARTS AND ILLUSTRATIONS

77

-HOT-

CAU

TION

shock,
connec

t t
o prop
erly gr

ounded outlets o

nly.

electr

ique br
anche
z seulemen

t a un

e prise

Pou
r assur
er pr

otec

tion c
on
tinue c

on
tre le cho

c

cor
rec
tem
ent mise a t

err
e.

AVE

RTI

SSEMENT:

To

pro

vide c
ontinued pr

ot
ection against electr

ical

DHHS Feder
al Per

for
manc

e S
tandar
d 21 CFR 1030.1

0.

Thi

s O
ven c
omplies with applic

able sec

tions of

recei
ved
, i
ncluding in

ter
fer

ence tha

t ma
y c
ause

2.
Thi

s de
vic
e must acc

ept an

y in
ter
ferenc

e

1.
Thi
s devic

e may not cause har

mful in

ter

ferenc
e
.

Oper
ati

on is subjec
t t
o the f

ollowing c

onditions:

Thi
s devic

e complies with P

ar

t 18 of the FC

C Rules

.

undesir

ed op
era
tion.

WAR

NING:

NOTICE:

Covers and Miscellaneous Parts - Non-SBK

127. NGC-1069-1 Cover, Left Side

128. NGC-1069-2 Cover, Right Side

129. NGC-1068 Cover, Top

130. 102752 Screw, #8-16 TORX HD
Security

131. 101688 Screw, #8 Serrated Phillips
TRHD, CRES

132. 102921 Screw, #8-32 x 3/8”, PPHD,
SEM, Int Tooth, SS

133. NGC-1071-2 Cover, Bottom Front

134. 100785 Leg, NGC, Black Plastic

100781 Leg, NGC, Stainless Steel

135. 101191 Hole Plug, 1/2” Dia, Black

136. NGC-1054-1 Assy, Keypad/Display, Cover,
Standard

NGC-1054-2 Assy, Keypad/Display, Cover,

Subway

137. NGC-1064-1 Rack, Standard (USA)

NGC-1274 Rack, Recessed (International)
NGC-3064 Rack, Raised

138. NGC-3037 Stone, Unglazed
NGC-3038 Stone, Clear Glazed
NGC-3063 Stone, Fiber-Reinforced

139. NGC-1176-1 Label, Schematic (N. America)
NGC-1176-2 Label, Schematic (UK/Ireland)
NGC-1176-3 Label, Schematic (Eu/Asia/Pac

400VAC)

NGC-1176-4 Label, Schematic (Eu/Asia/Pac

230 VAC)

NGC-2020 Label, Schematic (Gen. Brazil)

140. NGC-1177 Label, Service Assistance

141. NGC-1148 Label, Caution Hot

142. 102962 Nut, KEPS HEX, #8-32, Ext

Tooth, CRES

143. NGC-1187 Pad, Abrasive Non-slip

144. NGC-1082 Cover, Cooling Fan

FIGURE 46: COVERS AND MISCELLANEOUS PARTS - NON-SBK OVENS

x2

128

127

129

130

x3 per panel

131

x2

132

133

134

x4

x4

143

x4

135

136

137

138

140

139

141

142

x2

144

78

SERVICE PARTS AND ILLUSTRATIONS

-HOT-

CAU

TION

shock,
connec

t t
o prop
erly grounded outlets o

nly.

elec
tr
ique branche

z seulemen

t a un

e prise

P

ou
r assur
er pr

otec

tion c
on
tinue c

on
tre le cho

c

cor
rec
tem
ent mise a t

err
e.

AVE

RTI

SSEMENT:

To pro

vide c
ontinued pr

ot
ection against electr

ical

DHHS F
eder
al Per

for

mance S
tandar
d 21 CFR 1030.1

0.

Thi
s Oven c

omplies with applic

able sec

tions of

recei
ved
, i
ncluding in

ter
fer

ence tha

t ma
y c
ause

2.
Thi
s devic

e must acc

ept an

y in
ter
ferenc

e

1.
Thi
s devic

e may not cause har

mful in

ter

ferenc
e
.

Oper
ati

on is subjec
t t
o the f

ollowing c

onditions:

Thi
s devic

e complies with P

art 18 of the FC

C Rules

.

undesir

ed op
era
tion.

WAR

NING:

NOTICE:

Covers and Miscellaneous Parts - SBK

145. NGC-1213-1 Cover, Left Side

146. NGC-1213-2 Cover, Right Side

147. NGC-1211 Cover, Top

148. 102756 Screw, #8 x 1/2 Lg
TORX HD Security

149. 101691 Screw, #8 Serrated Phillips
TRHD, CRES

150. 102922 Screw, #8-32 x 3/8”, PPHD,
SEM, Int Tooth, SS

151. NGC-1212 Cover, Bottom Front

152. 100784 Leg, NGC, SBK, 4” (qty 1)

153. 101191 Hole Plug, 1/2” Dia, Black

154. NGC-1054-3 Assy, Keypad/Display, Cover

155. NGC-3064 Rack, Raised

156. NGC-3038 Stone, Clear Glazed

157. NGC-1176-1 Label, Schematic (USA)
NGC-1176-2 Label, Schematic (UK/Ireland)
NGC-1176-3 Label, Schematic (Eu/Asia/Pac

400VAC)

NGC-1176-4 Label, Schematic (Eu/Asia/Pac

230 VAC)

NGC-2011-8 Label, Schematic (Latin America)

158. NGC-1177 Label, Service Assistance

159. NGC-1148 Label, Caution Hot

160. 102962 Nut, KEPS HEX, #8-32, Ext

Tooth, CRES

161. NGC-1187 Pad, Abrasive Non-slip

162. NGC-1082 Cover, Cooling Fan

FIGURE 47: COVERS AND MISCELLANEOUS PARTS - SBK OVENS

x2

146

145

147

148

x3 per panel

149

x2

150

151

152

x4

x4

161

x4

153

154

155

158

157

159

160

x2

162

156

Comprehensive Part List

ITEM DESCRIPTION

PART NUMBER FIGURE NUMBER (PAGES 65-78)

Actuator, Door NGC-1076-2 29, 35
Assembly, Keypad/Housing, Cover, Standard NGC-1054-1 46
Assembly, Keypad/Housing, Cover, SWY NGC-1054-2 46
Assembly, Keypad/Housing, Cover, SBK NGC-1054-3 47
Bearings, Bronze, 3/16 ID x 5/16 OD x 1/4 100059 30
Block, Hinge NGC-1061 26, 35
Block, Sealing, Blower Motor NGC-1024 38
Blower Motor NGC-1025 38
Bolt, 1/4-20 x 1.00 102945 35
Bracket, Stacking TC3-0323 None
Cable, Ribbon, 26-Pin 100184 17
Cable, Smart Card Reader 100182 17
Cable, VF Display, 3-Pin 100193 17
Cap, Hole, Door 101191 26
Capacitor, HV (Europe, Asia-Pacific) NGC-3020-2 20
Capacitor, HV (Japan) 100207 20
Capacitor, HV (USA, Latin America, S. Korea) NGC-3020 20
Cart, TurboChef Oven, 18” NGC-1217-2 4 (Page 4)
Cart, TurboChef Oven, 24” NGC-1217-1 4 (Page 4)
Catalytic Converter NGC-1012 39
Channel, Door Handle NGC-1127 35
Clamp, Blower Seal NGC-1023 38
Cleaner, TurboChef Oven, Domestic 103180 None
Cleaner, TurboChef Oven, International 103380 None
Cleaner, Wave Guide Cover, Domestic 103183 None
Cleaner, Wave Guide Cover, International 103383 None
Clip, Catalytic Converter, Standard NGC-1030 39
Clip, Catalytic Converter, SBK NGC-1233 39
Cord, Power (Australia) 103195 None
Cord, Power (Japan 1Ph) NGC-1390 None
Cord, Power (Japan 3Ph) NGC-1383 None
Cord, Power (NGC ED - Europe, Asia-Pacific) 100194 None
Cord, Power (NGC EW - Europe, Asia-Pacific) 103187 None
Cord, Power (UK, Ireland, Brazil) 100195 None
Cord, Power (USA) 100187 None
Cover, Bottom Front, Standard NGC-1071-2 46
Cover, Bottom Front, SBK NGC-1212 47
Cover, Cooling Fan NGC-1082 46, 47
Cover, Keypad/Display, Standard NGC-1040 17
Cover, Keypad/Display, SBK NGC-1209 17
Cover, Left Side, Standard NGC-1069-1 46
Cover, Left Side, SBK NGC-1213-1 47
Cover, Motor NGC-1081 38
Cover, Right Side, Standard NGC-1069-2 46
Cover, Right Side, SBK NGC-1213-2 47
Cover, Top, Standard NGC-1068 46
Cover, Top, SBK NGC-1211 47
Cover, Wave Guide NGC-3036 22
Diode, HV 100481 20
Display NGC-3023 17
Door, Standard NGC-3067 26, 35
Door, SBK NGC-3067-2 26, 35

79

COMPREHENSIVE PART LIST

ITEM DESCRIPTION

PART NUMBER FIGURE NUMBER (PAGES 65-78)

Fan Blade, Motor NGC-3007 38
Fan, Magnetron Cooling 100083 20
Filter, EMI, 1Ph (USA, Europe, Latin America, Japan) 100542 None
Filter, EMI, 3Ph (Europe, Asia-Pacific, Korea, Japan) 100545 None
Fuse, F1, 12 Amp 100592 38
Fuse, F2, 12 Amp 100592 38
Fuse, F3, 20 Amp 100599 20
Gasket, Convection Heater NGC-1043 38
Gauge, Door Switch (Adjustment Tool) NGC-1215 32
Grease, Food Grade, USDA H-1 NGC-3006 30
Guard, TurboChef Oven, Domestic 103181 None
Guard, TurboChef Oven, International 103381 None
Handle, Door, Standard 102750 35
Handle, Door, SBK NGC-1216 None
Harness, Line Voltage (Europe, Asia-Pacific, Japan) NGC-1150-3 None
Harness, Line Voltage (North America) NGC-1150-1 None
Harness, Line Voltage (UK, Ireland, Brazil) NGC-1150-2 None
Harness, Low Voltage, Old Switch Setup 100185 None
Harness, Low Voltage, New Switch Setup NGC-1418 None
Heater Element, IR NGC-3003 39
Heater, Convection NGC-3011 38
Hinge, Left 102805 26
Hinge, Right 102804 26, 31, 33, 34
Insulation, Door, 1 NGC-1125-1 35
Insulation, Door, 2 NGC-1125-2 35
Insulator, Adhesive NGC-1163 21
Keypad, OUT NGC-1110-4 17
Keypad, Standard NGC-1110-1 17
Keypad, SBK NGC-1110-3 17
Keypad, SWY NGC-1110-2 17
Label, Caution, Empty Cavity NGC-1165 35
Label, Caution, Hot NGC-1148 46, 47
Label, Precaution for Safe Use NGC-1138 35
Label, Schematic (Europe, Asia-Pacific, 230 VAC) NGC-1176-4 46, 47
Label, Schematic (Europe, Asia-Pacific, 400 VAC) NGC-1176-3 46, 47
Label, Schematic (USA) NGC-1176-1 46, 47
Label, Schematic (UK, Ireland) NGC-1176-2 46, 47
Label, Schematic, Standard (Latin America) NGC-2020 46
Label, Schematic, SBK (Latin America) NGC-2011-8 47
Label, Service Assistance NGC-1177 46, 47
Label, Service Number NGC-1170 35
Latch, Bracket NGC-1072 30
Latch, Spring Door NGC-1087 30
Leg, 4”, Black Plastic 100785 46
Leg, 4”, Standard, Stainless Steel 100781 46
Leg, 4”, SBK 100784 47
Leg, 7”, SBK Kit (4 legs) NGC-3068 47
Magnetron NGC-3015 20, 21
Motor Controller 100443 38
Nameplate, TurboChef NGC-1155 35
Nut, Crescent, Keps, Hex, #8-32, External Tooth 102692 46, 47

80

COMPREHENSIVE PART LIST

ITEM DESCRIPTION

PART NUMBER FIGURE NUMBER (PAGES 65-78)

Nut, Flange, 1/4-20 100906 38
Nut, M5, Yellow Zinc (Magnetrons, Bottom Electrical Plate) 100101 None
Nut, Push, 1/8 101293 35
Nut, Stainless, #4-40 102960 17
Pad, Abrasive, Non-Slip NGC-1187 46, 47
Pin, Clevis, 3/16 Diameter x 1” Long 101119 30
Plate, Door Switch NGC-1126 30, 31, 33, 34
Plug, Hole, Black, 1/2” Diameter 101191 46, 47
Rack, Raised NGC-3064 46, 47
Rack, Recessed NGC-1274 46
Rack, Standard NGC-1064-1 46
Reader, Smart Card 100506 17
Relay, K1, Filament Transformers 101273 20
Relay, K2, HV Transformers 101273 20
Relay, K3, Monitor 101273 20
Relay, K4/K5, Solid State, Convection Heater/IR Element NGC-3005 38
Relay, K6, 208/240 Transformer Taps (USA only) 101272 None
Relay, K7, Magnetron Fan, DNK NGC-3030-11 None
Relay, K7, Magnetron Fan, OXXO NGC-3030-5 None
Relay, K7, Magnetron Fan, SBK (USA) NGC-3030-3 20
Relay, K7, Magnetron Fan, SBK (Europe, Asia-Pacific MPh) NGC-3030-15 20
Relay, K7, Magnetron Fan, SBK (Europe SPh) NGC-3030-13 20
Relay, K7, Magnetron Fan, SBK (Indiana/North Carolina) NGC-3030-14 20
Relay, K7, Magnetron Fan, Standard (USA) NGC-3030-1 20
Relay, K7, Magnetron Fan, Standard (Europe, Asia-Pacific MPh) NGC-3030-4 20
Relay, K7, Magnetron Fan, Standard (Europe SPh) NGC-3030-7 20
Relay, K7, Magnetron Fan, Standard (Latin America) NGC-3030-12 20
Relay, K7, Magnetron Fan, SWY (USA) NGC-3030-2 20
Relay, K7, Magnetron Fan, SWY (Europe, Asia-Pacific MPh) NGC-3030-9 20
Relay, K7, Magnetron Fan, SWY (Europe, Latin America SPh) NGC-3030-6 20
Relay, K7, Magnetron Fan, TESCO NGC-3030-10 None
Relay, K7, Magnetron Fan, WAWA NGC-3030-8 None
Ring, E-clip 101296 30
Ring, Snap 101312 39
Screw, #4-40 x 5/8 102902 31
Screw, #4-40 x 3/4 101555 32
Screw, #4-40 x 1 1/8 101558 33, 34
Screw, #4-40 x 1 1/4 101557 29, 30
Screw, #6, Sheet Metal 100684 21
Screw, #8, Crescent, TRHD, Serrated Phillips 101688 35, 38, 39, 46
Screw, #8, Crescent, TRHD, Serrated Phillips, Black Oxide 101691 47
Screw, #8-16, Torx Security 102752 46
Screw, #8-16 x 1/2, Torx Security, Black Oxide 102756 47
Screw, #8-18, SS 101701 22
Screw, #8-32 x 3/8 102921 29, 30, 31, 32, 33, 34, 46
Screw, #8-32 x 3/8, PFH, CSK 102809 22, 26, 29, 32, 35
Screw, #8-32 x 3/8, PPHD, SEM, SS, Internal Tooth 102922 47
Screw, #8-32 x 3/8, Torx Security 102748 35
Screw, #8-32 x 1/2, Cap 101666 22
Screw, #10-32 x 1/2, SS, Hex 101381 26
Shield, Microwave NGC-1116 39

COMPREHENSIVE PART LIST

81

ITEM DESCRIPTION

PART NUMBER FIGURE NUMBER (PAGES 65-78)

Shim, 0.030 NGC-1169-1 32
Shim, 0.045 NGC-1169-2 32
Shim, Door Latch NGC-1132 35
Shim Tool, 0.030 NGC-1344 32
Shim Tool, 0.060 NGC-1340 32
Shunt Plate, Door NGC-3021 35
Smart Card, Blank 100508 17
Smart Card, Programmed (call TurboChef for Part Numbers) Varied 17
Spacer, Aluminum, 1/2” 101954 17
Standoff, #8-32 F/F x 1” 101912 31
Standoff, #8-32, F/F x 1”, 5/16 Diameter 101914 33, 34
Standoff, #8-32, M/F x 5/16”, 1/4 Diameter 101915 33, 34
Stone, Baking, Fiber-Reinforced NGC-3063 46
Stone, Baking, Glazed, Clear NGC-3038 46, 47
Stone, Baking, Unglazed NGC-3037 46
Support, Frame NGC-1047 22
Switch, Door, Assembly NGC-3033 29, 32
Switch, Door (Component) 102012 29, 30, 31, 32, 33, 34
Tape, Aluminum 102698 35
Thermocouple, Electrical Compartment (EC) 700-1199 None
Thermocouple, Cook Cavity (CC) NGC-1140 None
Thermostat, High-Limit 102075 38
Thermostat, Magnetron 102070 21
Toggle, Latch NGC-1073 30
Transformer, Filament (USA, Korea) NGC-3061-1 20
Transformer, Filament (Europe, Asia-Pacific, Latin America) NGC-3061-2 20
Transformer, Filament (Japan) NGC-3061-3 20
Transformer, HV (USA, Latin America, Korea) NGC-3062-1 20
Transformer, HV (Europe, Asia-Pacific) NGC-3062-2 20
Transformer, HV (Japan) NGC-3062-3 20
Washer, Flat, #10 102140 26
Washer, Shim 102449 39
Washer, Split Lock, #10 102350 26
Wave Guide, Front NGC-3016 20, 22
Wave Guide, Rear NGC-3017 20, 22
Wire, Magnetron 100186 21

82

COMPREHENSIVE PART LIST

For further information call:

800.90

TURBO or

[phone]

Accelerating the World of Cooking

Headquarters

Six Concourse Parkway
Suite 1900
Atlanta, Georgia 30328

678.987.1700

PHONE

678.987.1750

FAX

TURBOCHEF

.COM

Global Operations

4240 International Parkway
Suite 105
Carrollton, Texas 75007

214.379.6000

PHONE

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