ELETTRODOMESTICI
VIA CHECCHI 98
I 21013 GALLARATE
ITALY
Page 23 of 28
Tuesday, June 18, 2002
BOSCH 700 SERIES:
SERVICE INSTRUCTIONS FOR OVEN TESTING AND BASIC TROUBLESHOOTING
CONNECTION CABLE BETWEEN DISPLAY BOARD P5 (10POS) AND KEYBOARD J1 (STRIP 12POS)
Double oven version
P5 J1 FUNCTION NOTES
12 NOT USED CONNECTED WITH J1-1 ON THE KEYBOARD.
11 FREE POSITION USED FOR CONNECTOR POLARISING.
1 10 +15V OBSOLETE. THE CURRENT KEYBOARD DOESN’T USE +15V ANYMORE.
2 9 FEEDBACK KEYBOARD SENSE FEEDBACK.
3 8 RETURN 3
RETURN LINE FOR UPPER CANCEL, COOKING MODE KEYS.
4 7 RETURN 2
RETURN LINE FOR UPPER/LOWER, TEMPERATURE, START KEYS.
5 6 RETURN 1
RETURN LINE FOR LOWER CANCEL, LIGHT, TIME KEYS.
6 5 RETURN 4
ADDITIONAL SAFETY RETURN LINE FOR ALL CANCEL KEYS.
7 4 STROBE 3
STROBE LINE FOR TIME, START KEYS.
8 3 STROBE 2
STROBE LINE FOR COOKING MODE, TEMPERATURE, LIGHT KEYS.
9 2 STROBE 1
STROBE LINE FOR UPPER CANCEL, UPPER/LOWER, LOWER CANCEL KEYS.
10 1 GND GROUND VOLTAGE REFERENCE FOR ALL LINES TO KEYBOARD.
REMARK: The control sends three strobe signals alternatively and checks the return lines to see if one of the signals is coming back.
Every strobe line scans three keys, if there is a return signal it means that the key has been pressed.
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