Sharp R-362M (serv.man2) Service Manual ▷ View online
R362M - 10
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit. It accompanies a very small error because it
works on commercial frequency.
order to compose a basic standard time in the clock
circuit. It accompanies a very small error because it
works on commercial frequency.
4) ACL
A circuit to generate a signal which resets the LSI to the
initial state when power is supplied.
initial state when power is supplied.
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to
emit audible sounds (key touch sound and completion
sound).
emit audible sounds (key touch sound and completion
sound).
6) Door Sensing Switch (Stop Switch)
A switch to "tell" the LSI if the door is open or closed.
7) Relay Circuit
To drive the magnetron, fan motor, turntable motor
and light the oven lamp.
and light the oven lamp.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD1 - LD10).
LD1 - LD10).
9) Indicator Circuit
This circuit consists of 7-digits, 39-segments and 3-
common electrodes using a Liquid Crystal Display.
common electrodes using a Liquid Crystal Display.
10) Absolute Humidity Sensor Circuit
This circuit detects the humidity of a food which
is being cooked, to control its automatic cooking.
is being cooked, to control its automatic cooking.
The touch control section consists of the following units as
shown in the touch control panel circuit.
shown in the touch control panel circuit.
(1) Key Unit
(2) Control Unit (The Control unit consists of Power unit and
(2) Control Unit (The Control unit consists of Power unit and
CPU unit.)
The principal functions of these units and signals communi-
cated among them are explained below.
cated among them are explained below.
Key Unit
The key unit is composed of a matrix, signals generated in the
LSI are sent to the key unit from P40, P41, P72, P73 P74, P75,
P76 and P77.
When a key pad is touched, a signal is completed through the
key unit and passed back to the LSI through P44 - P47 to
perform the function that was requested.
LSI are sent to the key unit from P40, P41, P72, P73 P74, P75,
P76 and P77.
When a key pad is touched, a signal is completed through the
key unit and passed back to the LSI through P44 - P47 to
perform the function that was requested.
Control Unit
Control unit consists of LSI, power source circuit, synchroniz-
ing signal circuit, ACL circuit, buzzer circuit, relay circuit,
temperature measurement circuit, indicator circuit, absolute
humidity sensor circuit and back light circuit.
ing signal circuit, ACL circuit, buzzer circuit, relay circuit,
temperature measurement circuit, indicator circuit, absolute
humidity sensor circuit and back light circuit.
1) LSI
This LSI controls the temperature measurement signal,
AH sensor signal, key strobe signal, relay driving signal
for oven function and indicator signal.
AH sensor signal, key strobe signal, relay driving signal
for oven function and indicator signal.
2) Power Source Circuit
This circuit generates voltage necessary in the control
unit.
unit.
Symbol
Voltage
Application
VC
-5.2V
LSI(IC1)
R362M - 11
DESCRIPTION OF LSI
LSI(IZA961DR)
The I/O signal of the LSI(IZA961DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
20 msec.
H : GND
L (-5V)
A
B
C
H: GND
L
0.12 sec
2.4 sec
1.2 sec
1.2 sec
1
C1
IN
Terminal not used.
2
VL1
IN
Power source voltage input terminal.
Standard voltage for LCD.
3-5
AN7-AN5
IN
Heating constant compensation terminal.
6-7
AN4-AN3
IN
Terminal not used.
8
AN2
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
Door opened; "L" level signal.
9
AN1
IN
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.
to the A/D converter built into the LSI.
10
AN0
IN
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 converter built into LSI.
This input is an analog input terminal from the AH sensor circuit, and connected
to the A/D converter built into the LSI.
input is an analog input terminal from the AH sensor circuit, and connected to
the A/D converter built into LSI.
This input is an analog input terminal from the AH sensor circuit, and connected
to the A/D converter built into the LSI.
11
P57
OUT
Terminal not used.
12
P56
OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven
B: Completion sound.
C: When the temperature of the oven
cavity reaches the preset tem-
perature in the preheating mode,
or when the preheating hold time
(30 minutes) is elapsed.
perature in the preheating mode,
or when the preheating hold time
(30 minutes) is elapsed.
13
P55
OUT
Terminal not used.
14-18
P54-P50
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor).
19
P47
IN
Signal coming from touch key.
When any one of G12 line keys on key matrix is touched, a corresponding signal
from P40, P41, P72, P73, P74, P75, P76 and P77 will be input into P47. When
no key is touched, the signal is held at "L" level.
from P40, P41, P72, P73, P74, P75, P76 and P77 will be input into P47. When
no key is touched, the signal is held at "L" level.
20
P46
IN
Signal similar to P47.
When any one of G11 line keys on key matrix is touched, a corresponding signal
will be input into P46.
will be input into P46.
21
P45
IN
Signal similar to P47.
When any one of G10 line keys on key matrix is touched, a corresponding signal
will be input into P45.
will be input into P45.
22
P44
IN
Signal similar to P47.
When any one of G9 line keys on key matrix is touched, a corresponding signal
will be input into P44.
will be input into P44.
23
INT1
IN
Terminal not used.
24
INT0
IN
Signal to synchronized LSI with commercial power source frequency(50Hz).
This is basic timing for time processing of LSI.
25
P41
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G8 line key on matrix is touched.
while one of G8 line key on matrix is touched.
26
P40
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G7 line key on matrix is touched.
while one of G7 line key on matrix is touched.
R362M - 12
Pin No.
Signal
I/O
Description
During cooking
L
H
20 msec.
ON
OFF
( During cooking )
L
GND
H.
27
P77
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G6 line key on matrix is touched.
while one of G6 line key on matrix is touched.
28
P76
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G5 line key on matrix is touched.
while one of G5 line key on matrix is touched.
29
P75
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G4 line key on matrix is touched.
while one of G4 line key on matrix is touched.
30
P74
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G3 line key on matrix is touched.
while one of G3 line key on matrix is touched.
31
P73
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G2 line key on matrix is touched.
while one of G2 line key on matrix is touched.
32
P72
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G1 line key on matrix is touched.
while one of G1 line key on matrix is touched.
33
P71
OUT
Square Waveform : 50Hz.
The square waveform voltage is de-
livered to the relay (RY2) driving cir-
cuit.
livered to the relay (RY2) driving cir-
cuit.
34
P70
IN
Connected to VC.
35
RESET
IN
Signal is input to reset the LSI to the initial state when power is applied.
Temporarily set to "L" level the moment power is applied, at this time
the LSI is reset. Thereafer set at "H" level.
Temporarily set to "L" level the moment power is applied, at this time
the LSI is reset. Thereafer set at "H" level.
36
P81
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2).
In 100% operation, the signals hold "L"
level during microwave cooking and "H"
level while not cooking. In other cooking
modes (70%, 50%, 30%, 10%) the sig-
nal turns to "H" level and "L" level in
repetition according to the power level.
In 100% operation, the signals hold "L"
level during microwave cooking and "H"
level while not cooking. In other cooking
modes (70%, 50%, 30%, 10%) the sig-
nal turns to "H" level and "L" level in
repetition according to the power level.
37
P80
OUT
Terminal not used.
38
XIN
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
with respect to XIN terminal.
39
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
40
VSS
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
41-42
P27-P26
OUT
Terminal not used.
43
P25
OUT
Oven lamp, turntable motor, fan motor driving signal.
To turn on and off the relay RY5. "L"
level during cooking. "H" level other-
wise.
level during cooking. "H" level other-
wise.
44-48
P24-P20
OUT
Terminal not used.
49-50
P17-P16
OUT
Terminal not used.
ON/OFF time ratio in Micro
cooking
(a. 32second time base)
cooking
(a. 32second time base)
MICRO
ON
OFF
COOK
100%
32 sec.
0 sec.
70%
24 sec.
8 sec.
50%
18 sec. 14 sec.
30%
12 sec. 20 sec.
10%
6 sec. 26 sec.
DESCRIPTION OF LSI
LSI(IZA961DR)
The I/O signal of the LSI(IZA961DR) are detailed in the following table.
R362M - 13
Pin No.
Signal
I/O
Description
51-80
SEG39-SEG10
OUT
Segment data signal.
Connected to LCD.
The relation between signals are as follows:
The relation between signals are as follows:
LSI signal (Pin No.)
LCD (Pin No.)
LSI signal (Pin No.)
LCD (Pin No.)
SEG 0 (90) ....................SEG39 (51)
SEG 0 (90) ....................SEG39 (51)
SEG21 (69)
SEG19 (19)
SEG 1 (89) ....................SEG38 (50)
SEG 1 (89) ....................SEG38 (50)
SEG22 (68)
SEG18 (18)
SEG 2 (88) ....................SEG37 (49)
SEG 2 (88) ....................SEG37 (49)
SEG23 (67)
SEG17 (17)
SEG 3 (87) ....................SEG36 (48)
SEG 3 (87) ....................SEG36 (48)
SEG24 (66)
SEG16 (16)
SEG 4 (86) ....................SEG35 (47)
SEG 4 (86) ....................SEG35 (47)
SEG25 (65)
SEG15 (15)
SEG 5 (85) ....................SEG34 (46)
SEG 5 (85) ....................SEG34 (46)
SEG26 (64)
SEG14 (14)
SEG 6 (84) ....................SEG33 (45)
SEG 6 (84) ....................SEG33 (45)
SEG27 (63)
SEG13 (13)
SEG 7 (83) ....................SEG32 (44)
SEG 7 (83) ....................SEG32 (44)
SEG28 (62)
SEG12 (12)
SEG 8 (82) ....................SEG31 (43)
SEG 8 (82) ....................SEG31 (43)
SEG29 (61)
SEG11 (11)
SEG10 (80) ................... SEG30 (30)
SEG10 (80) ................... SEG30 (30)
SEG30 (60)
SEG10 (10)
SEG11 (79) ................... SEG29 (29)
SEG11 (79) ................... SEG29 (29)
SEG31 (59)
SEG 9 ( 9)
SEG12 (78) ................... SEG28 (28)
SEG12 (78) ................... SEG28 (28)
SEG32 (58)
SEG 8 ( 8)
SEG13 (77) ................... SEG27 (27)
SEG13 (77) ................... SEG27 (27)
SEG33 (57)
SEG 7 ( 7)
SEG14 (76) ................... SEG26 (26)
SEG14 (76) ................... SEG26 (26)
SEG34 (56)
SEG 6 ( 6)
SEG15 (75) ................... SEG25 (25)
SEG15 (75) ................... SEG25 (25)
SEG35 (55)
SEG 5 ( 5)
SEG16 (74) ................... SEG24 (24)
SEG16 (74) ................... SEG24 (24)
SEG36 (54)
SEG 4 ( 4)
SEG17 (73) ................... SEG23 (23)
SEG17 (73) ................... SEG23 (23)
SEG37 (53)
SEG 3 ( 3)
SEG18 (72) ................... SEG22 (22)
SEG18 (72) ................... SEG22 (22)
SEG38 (52)
SEG 2 ( 2) .....................SEG19 (71)
SEG21 (21)
SEG39 (51) .....................SEG 1 ( 1)
SEG20 (70)
SEG20 (20)
81
SEG9
OUT
Terminal not used.
82-90
SEG8-SEG0
OUT
Segment data signal.
Connected to LCD. Signal is similar to SEG39.
91
VCC
IN
Connected to GND.
92
VREF
IN
Connected to GND.
93
AVSS
IN
Connected to VC.
94
COM3
OUT
Terminal not used.
95
COM2
OUT
Common data signal: COM3.
Connected to LCD (Pin No. 35).
96
COM1
OUT
Common data signal: COM2.
Connected to LCD (Pin No. 34).
97
COM0
OUT
Common data signal: COM1.
Connected to LCD (Pin No. 33).
98-99
VL3-VL2
IN
Power source voltage input terminal.
Standard voltage for LCD.
100
C2
IN
Terminal not used.
DESCRIPTION OF LSI
LSI(IZA961DR)
The I/O signal of the LSI(IZA961DR) are detailed in the following table.
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