Bosch HBL 73 Service Manual page 39

ELETTRODOMESTICI
VIA CHECCHI 98
I 21013 GALLARATE
ITALY
CHECK CONNECTIONS MEANS:
1. ALL CONNECTIONS MUST CORRESPOND TO THE ELECTRIC SCHEMATICS. EXCHANGING CONNECTIONS CAN
DAMAGE THE BOARDS.
2. SHORT OR OPEN CIRCUIT DETECTION.
3. BAD CONNECTOR ASSEMBLING OR HEADER JOINTS WELDING ON THE ELECTRONIC BOARDS.
4. LOOSE CONTACTS OR CONNECTOR TERMINALS INCORRECT INSERTION IN THE HOUSING.
5. REVERSE PIN-TO-PIN CABLES, 1POS SHIFTED CONNECTORS.
6. WIRES CUT OR PINCHED TO DEAD METAL PARTS.
FAULT CAUSE
F31 UPPER OR SINGLE OVEN
TEMPERATURE SENSOR FAILURE.
F32 LOWER OVEN TEMPERATURE
SENSOR FAILURE.
F41 UPPER OR SINGLE OVEN LATCH
WILL NOT LOCK.
Tuesday, June 18, 2002
BOSCH 700 SERIES:
SERVICE INSTRUCTIONS FOR OVEN TESTING AND BASIC TROUBLESHOOTING
BASIC TROUBLESHOOTING
1. Check connections between P4 on the Power Board and the RTD sensor.
2. Unplug the sensor connector and check its resistance (approximately 1080 ohms
at room temperature with connector removed). Remember to reconnect it.
3. Replace Power Board.
1. Check connections between P24 on the Power Board and the RTD sensor.
2. Unplug the sensor connector and check sensor resistance (approximately 1080
ohms at room temperature with connector removed). Remember to reconnect it.
3. Replace Power Board.
1. Check connections between P4 connector on the Power Board and the latch
switches.
ACTION
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