Wolf MWD24-2 Service Manual page 33

Drawer Microwave
Pin No. Signal I/O
58 P52 OUT
59 P51 IN
60 INT0 IN
61 AVSS IN
62 VREF IN
63 AN7 IN
64 AN6 IN
(Models MWD24-2 / MWD30-2)
Description
Signal to Sound Buzzer:
A: Key touch sound.
B: Completion sound.
C: When the oven stops so that the food can be
checked in Automatic cooking mode.
Input Signal Which Communicates the Drawer Door Close Information to LSI:
Door opened; "H" level signal(+5V).
Door closed; "L" level signal(0V).
Signal to Synchronize LSI With Commercial
Power Source Frequency: This is the basic
timing for all real time processing of LSI.
A/D Converter Power Source Voltage: The power source voltage to drive the A/D
converter in the LSI.
Reference Voltage Input Terminal: A reference voltage applied to the A/D converter
in the LSI. Connected to +5V.
AH Sensor Input: This input is an analog input terminal from the AH sensor circuit,
and connected to the A/D converter built into the LSI.
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is
an analog input terminal from the AH sensor circuit, and connected to the A/D con-
verter built into the LSI.
3-21
Theory of Operation
0.1 sec
A
2.0 sec
B
1.0 sec 1.0 sec
C
16.7 msec.
#813632 - Revision B - December, 2009
H: +5V
L: GND
H : +5V
L : GND