Turbo Chef Technologies NGC-1007 service manual Voltage Transformers, Determine cause of failure

Page 45

THE MICROWAVE SYSTEM

35

I S S U E

R E S O L U T I O N

F3: Magnetron

W A R N I N G : Never try to check the secondary voltages of the High

Current Low (cont.)

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 compo-

 

nent 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 con-

 

trol 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.

 

N O T E : 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.

 

 

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Contents Accelerating the World of Cooking For further information call Important Safety Information Please Read First Table of Contents Oven Door Microwave SystemService Parts and Illustrations Schematics and Schematic ComponentsConvection Circuit IR Element and Catalytic ConverterImportant Safety Instructions Grounding Instructions Installation, Specifications, and Maintenance Standard Features DimensionsPower Supply North America ConstructionPower Supply Latin America Power Supply Europe, Asia-PacificPower Supply South Korea Built-In Installation FigureInstallation Near Open Heat Source Figure Initial Power-up SetupOven Restraint Kit TC3-0242 KIT StackingRemove and Clean the Cooking Surface Remove the Lower Access PanelClean Oven Interior Clean Lower Access Panel AreaTheory of Operation Chapter Set Temperature, IR Element Irsp and Irsi Set Temperature, Cook Cavity CcspActual Temperature, Cook Cavity TCC Actual Temperature, IR Element TIRKeypad Fault CodeDisplay Self-Test StestFault Codes F1 Blower Running Status Bad F2 Cook Temperature LowF3 Magnetron Current Low F4 Door Monitor DefectiveThermocouple temperature is below the indicated limit F5 Magnetron Over TemperatureF7 Thermocouple Open F8 Heat LowControl System Mech Interlock Switches VDC Power SupplyK1 Mechanical Relay K2 Mechanical RelayBlower Speed Screen Faults ScreenSelf-Test Function Screen Heater Test ScreenElectronic Compartment Temperature Screen Diagnostic Display ScreenChanging the Cook Chamber Temperature Cooks ScreenAltering a Recipe Loading a Menu from a Smart Card Snooze ModeDone Screen Time ScreenEnter Key Code Function/ScreenSmart Card Reader Cable Board J3 connector Replace I/O control board Reference page 54 for a schematic of the I/O control boardPin connector If not, correct the voltage supplyTroubleshooting VAC is going to the motor controller via pins 2Refer to page 50 for motor controller troubleshooting Detailed troubleshootingIf high-limit is not tripped, follow the instructions below Microwave System Voltage Doubler Circuit Description Microwave System Filament and High Voltage Terminals ORG High-Voltage Transformers MagnetronFilament Transformers F3 FuseWave Guide Cover Replacement NGC-3036Kit, Wave Guide Cover Includes Item 31 and sealant Wiring the High-Voltage TransformersScrews, #8, SST NGC-1047Support, Frame Remove the wave guide cover. See Wave GuideProcedure for Measuring RF Leakage Wiring the Filament TransformersHow to Check a Diode Testing the High-Voltage DiodeHow to Check a High-Voltage or Filament Transformer How to Check a CapacitorComponents MagnetronRemove the top and right side covers Back and Enter keys, enter the code 9-4-2-8 and press EnterVoltage Transformers HV capacitor shorted or failing follow troubleshooting onMgtron soft key. Voltage present should be 200 +/- 10% Unplug the oven and replace relay if necessaryPrimary and secondary, the control would have recorded Troubleshooting see F4 MonitorOccurrence. See page 25 as well as Oven Door for Energizing the Microwave SystemOven Door Oven Door Critical Adjustment Notes 31 for proper procedureOven Burn-In Procedure Primary and Secondary Interlock Switch Adjustments and Parts PPHD, Cres Assembly Notes5963 Adjusting the Primary Interlock Switch NEW Switch Setup DIA 80 8198 AR 101Refer to Figures 35 Critical Adjustment Notes FigureActuator and toggle OK Check adjustment and wiring on Interlock switch statusNew setup for the proper adjustment procedure Door does not close freely Remove obstructions or readjustConvection Circuit Motor Controller Bmsc Main Convection HeaterHigh Limit Thermostat Convection Motor114 105 104 103 102 107 109 110 113 111108 106† Thermostat tripped Reset and determine why the thermostat Replace motor. For access to motor shaft, remove top panelCook Door Open Message Verify which switch is not actuating Readjust. See pages† Motor spins freely Verify motor windings see table below Verify motor spins freelyDisconnect control wiring Plug on schematics pages 55-63 while incrementing blowerConverter IR Element Catalytic ConverterRemoving the IR Element Installing a New IR Element Removing and Installing the Catalytic Converter119 122Schematics and Schematic Components Wire Harness Replacement P/Ns Line Voltage ComponentsLow Voltage Components Board Schematic Schematic Tornado NGC MAG Schematic Tornado Ngcew Schematic Tornado Ngced Schematic Brazil NGC Service Parts and Illustrations Relay Control SystemService Parts and Illustrations Monitor Circuit Shown in Failsafe State Microwave SystemWave Guide/Wave Guide Cover Parts Microwave System PartsSBK Oven DoorDoor Switch Parts Primary and Secondary Interlock Switch PartsPrimary Safety Switch Parts Monitor Safety Switch Parts80 81 Secondary and Monitor Safety Switch Parts Oven Door Parts 100Convection Circuit Convection Circuit Block Diagram114 105 104 103 102 107 108 106 109 110 113 111 112 Convection Circuit Parts123 Old Switch Setup 126 Wire Harness Replacement P/NIR Element and Catalytic Converter 122 119135 137 138 133 134 129 132 144 139 141147 150 162 157 159 153 155 156 151 152150 Screw, #8-32 x 3/8, Pphd NGC-2011-8 Comprehensive Part List Comprehensive Part List Comprehensive Part List Relay, K7, Magnetron Fan, Standard Europe, Asia-Pacific MPh Smart Card, Programmed call TurboChef for Part Numbers 800.90T U R B O or

NGC-1007 specifications

TurboChef Technologies has made a substantial impact in the commercial cooking industry with its advanced cooking equipment, and one of their standout products is the NGC-1007. The NGC-1007 is a revolutionary cooking oven designed to meet the demands of high-paced kitchens while ensuring superior cooking quality and efficiency.

One of the main features of the NGC-1007 is its high-speed cooking technology. Utilizing a combination of convection, impingement, and microwave cooking, this oven can reduce cooking times significantly while maintaining food quality. This multi-cooking method not only speeds up the cooking process but also enhances flavor and texture, making it ideal for cooking a wide variety of dishes, from pizzas to entrees.

The NGC-1007 also showcases advanced control technology, incorporating a user-friendly touch screen interface. This intuitive control panel allows chefs to easily navigate through various cooking settings and recipes, ensuring that each dish can be prepared to perfection. With programmable settings, operators can store favorite recipes and recall them at the touch of a button, improving efficiency and consistency in food preparation.

The design of the NGC-1007 reflects a commitment to reliability and durability. Built with high-quality materials, it can withstand the rigors of a bustling kitchen environment. Its compact size is perfect for establishments with limited space yet powerful enough to handle the demands of high-volume cooking.

Another key characteristic of the NGC-1007 is its energy efficiency. TurboChef has integrated innovative technology that reduces energy consumption without compromising cooking performance. This not only helps in cutting operational costs for restaurants but also aligns with sustainability goals by minimizing the environmental impact.

Furthermore, the NGC-1007 is equipped with easy-to-clean surfaces, making maintenance hassle-free. This is crucial in any busy kitchen, as it allows staff to focus on food preparation and service rather than extensive cleanup.

In summary, the TurboChef NGC-1007 is a game-changer for commercial kitchens looking to optimize their cooking processes. With its high-speed cooking capabilities, intuitive controls, durable construction, energy efficiency, and ease of maintenance, it stands out as a reliable option for chefs aiming to elevate their culinary output while managing time and resources effectively.
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