Service manual

27
KB-5121KS/K/W
Pin No. Signal I/O Description
47 P47 OUT Reset signal is outout to the LCD.
48 CS2 OUT Chip select signal is outout to the LCD.
49 P45 OUT Terminal not used.
50 P44 OUT Terminal not used.
51 P43 OUT Signal to turn on the indicator for the Cook Top Warmer is output to the LED (LD10).
52 P42 OUT Terminal not used.
53 P41 OUT Power source to drive the Microwave drawer door open-close motor is output.
54 P40 IN Terminal not used.
55 P37 OUT Terminal not used.
56 P36 OUT Terminal not used.
57 P35 OUT Cook top warmer driving signal.
To turn on and off relay(RY10).
“H” level: During cook top warmer ON.
“L” level: During cook top warmer OFF.
58 P34 OUT Terminal not used.
59 - 61 A11 - A9 OUT Terminal not used.
62 VCC2 IN Power source voltage: +3.3V.
The power source voltage to drive the LSI (IC-1) is input to VCC2 terminal.
63 A8 OUT Terminal not used.
64 VSS IN Power source voltage: 0V (GND).
VS voltage of power source circuit input. Connected to GND
65 - 70 A7 - A2 OUT Terminal not used.
71 A1 OUT Register select signal is input to the LCD.
72 A0 OUT Terminal not used.
73 P17 OUT Signal to sound buzzer.
A: Key touch sound (short beep).
B: Completion sound (melody or long beep).
74 P16 OUT Terminal not used.
75 P15 OUT Terminal not used.
76 P14 OUT Terminal not used.
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
“L” level: During fan motor OFF.
77 P13 OUT Fan motor (Drawer) driving signal.
To turn on and off relay(RY5).
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
78 P12 OUT Terminal not used.
79 P11 OUT Terminal not used.
80 P10 OUT Oven lamp and stirrer motor (drawer) driving signal.
To turn on and off relay(RY1).
“H” level: During oven lamp and stirrer motor ON.
“L” level: During oven lamp and stirrer motor OFF.
81 - 88 D7 - D0 OUT Data signal is output to LCD driver.
89 AN7 OUT Terminal not used.
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V