Wolf MWD24-2 Service Manual page 31

Drawer Microwave
Pin No. Signal I/O
27 COM0 OUT
28 VL3 IN
29 - 31 P27- P25 OUT
32 SEG20 OUT
33 P23 IN
34 P22 IN
35 P21 IN
36 P20 IN
37 P17 OUT
38 P16 OUT
39 P15 OUT
40 P14 OUT
41 P13 OUT
42 P12 OUT
43 P11 OUT
44 P10 OUT
45 P07 OUT
46 P06 OUT
(Models MWD24-2 / MWD30-2)
Description
Common Data Signal: Connected to LCD signal C4.
Connected VC (+5V).
Terminal not used.
Segment Data Signal: Connected to LCD segment S24.
Signal Coming from Touch Key: When any one of J-4 line keys on key matrix is
touched, a corresponding signal from P10 - P17 will be input into P23. When no key
is touched, the signal is held at "L" level.
Signal Similar to P23: When any one of J-3 line keys on key matrix is touched, a
corresponding signal will be input into P22.
Signal Similar to P23: When any one of J-2 line keys on key matrix is touched, a
corresponding signal will be input into P21.
Signal Similar to P23: When any one of J-1 line keys on key matrix is touched, a
corresponding signal will be input into P20.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-12 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-11 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-10 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-9 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-8 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-7 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-6 line key on matrix is touched.
Key Strobe Signal: Signal applied to touch-key section. A pulse signal is input to
P20 - P23 terminal while one of J-5 line key on matrix is touched.
Fan Motor (Drawer) Driving Signal: To turn on and off relay(RY4):
"H" level: During fan motor ON.
"L" level: During fan motor OFF.
Stirrer Motor Driving Signal: To turn on and off relay(RY3):
"H" level: During fan motor ON.
"L" level: During fan motor OFF.
ON
ON
3-19
Theory of Operation
OFF
OFF
#813632 - Revision B - December, 2009
H: +5V
L: GN D
H: +5V
L: GN D