Components; Control Board; Cooling Fans; Display - TurboChef High h batch 2 Service Manual

The control system signals, senses, commands, and
actuates all electrical components within then oven.
See page 49 for a schematic. See pages 38-40 for
illustrations regarding part locations and replace-
ment.

Components

The control system consists of the following
components:

Control board

£

Cooling fans

£

Display

£

EMI filter

£

Fuses

£

Keypad

£

Power cord

£

Power supply

£

Relay - rack oscillation motor

£

Smart card reader

£
Solid state relay
£
Thermocouple – cook cavity
£
Thermocouple – electrical compartment
£
Thermostat – cooling fan
£
Thermostat – high-limit
£
Voltage sensor
£
Wire harness
£
Control Board
Figure 32. The control board uses 24 VDC from
the power supply to control each electrical compo-
nent of the oven. Check for the 24 VDC on the
striped end of the D6 Diode. See page 52 for the
location of the D6 Diode on the control board.
Cooling Fans
Figure 32. The cooling fans (located in the rear of
the oven) are actuated by the cooling fan thermostat
when the temperature of the electrical compartment
reaches 120 º F (49 º C).
Display
Figure 31. The vacuum fluorescent display (VFD)
is the primary user interface. The display uses 5
VDC from the control board to operate.
EMI Filter
Figure 32. The EMI filter helps suppress the
amount of RF interference emitted by the oven.
Fuses
Figure 34. The F1 and F2 fuses are 12-amp,
ATMR, type D.
The F1 fuse (via brown wire) and F2 fuse (via blue
wire) are designed to blow in case of an over-
current situation relative to these components:
- BMSC motor controller
- Electrical compartment cooling fans
- Power supply
- Stirrer motor
Keypad
Figure 31. The keypad is a 5 x 11 matrix membrane
switch. For details on key functions, see page 13.
Power Cord
The power cord is equipped with a grounding wire
and plug. See page 2 for different plug configura-
tions, or page 49 for a schematic. To avoid poten-
tial hazards, only the manufacturer, an authorized
service agent, or a similarly-qualified person should
replace a damaged power cord.
Power Supply
Figure 32. The power supply outputs 24 VDC at
40 watts to the control board.
Relay - Rack Oscillation Motor
Figure 32. The relay is 30 amp, double pole, dou-
ble throw, 24 VDC, and actuates the rack oscillation
motor.
Smart Card Reader
Figure 31. The smart card reader allows the oven
operator to load menu updates from a smart card.
A menu that already exists in the oven can also be
saved to a smart card. For instructions, see page 15.
37