Thermador CJ302B, Service Manual

Page: 75 / 121

CJ Oven Service Manual Lit. No. 94-30-007A
Page 74
Voltages
When troubleshooting, testing and repairing the ovens, you will observe these voltages;
1) 4000 volts (half wave doubler) for microwave section.
2) 120/240 volts for elements and jet blowers
3) 24 volts D.C. for relay coils, and microwave board triac.
4) 24 volts A.C. for signal voltage.
5) 12 volts A.C . for halogen lights.
6) 12 volts rectified D.C. for the upper oven latch motor.
The following parts are high voltage parts of the microwave circuit;
magnetron tube
diode
capacitors
high voltage transformer
The following parts require 240 volts to function;
bake elements
broil elements
convection elements
The following parts require 120 volts A.C. to function;
Dac control (step down transformer 120 volts to 24 volts . A.C . and D.C.).
High voltage transformer ( steps down 120 V.A.C volts to 3.2 V.A.C.) filament voltage for magnetron
tube.
Steps up 120 V.A.C . to approximately 2000 V.D.C. for magnetron excitation.
Halogen light center tap transformer (120 V.A.C. to 12 V.A.C.).
convection motors
cooling motors
tube fan
microwave transformer cooling fan
stirrer motor
lower oven latch motor
The following parts require 24 volts D.C. to function;
relays K0 through K15 on DAC control.
relay K1 on microwave board
both double line break relays
The following require 12 volts A.C. to function;
halogen lights
p3 pin on microwave board.
The following part requires 12 volts D.C. rectified to function:
upper oven latch motor (for faster door closure).