Sharp R-963 (serv.man2) Service Manual ▷ View online
R-953/963M - 19
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
(2) Control Unit (The Control unit consists of Power unit
and CPU unit.)
The principal functions of these units and signals commu-
nicated among them are explained below.
nicated 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 P10, P11, P12, P13,
P14, P15, P16 and P17.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through P70, P71,
P72 and P73 to perform the function that was requested.
The key unit is composed of a matrix, signals generated in
the LSI are sent to the key unit from P10, P11, P12, P13,
P14, P15, P16 and P17.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through P70, P71,
P72 and P73 to perform the function that was requested.
Control Unit
Control unit consists of LSI, power source circuit, synchro-
nizing signal circuit, ACL circuit, buzzer circuit, relay
circuit, temperature measurement circuit, indicator circuit,
absolute humidity sensor circuit and back light circuit.
Control unit consists of LSI, power source circuit, synchro-
nizing 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 sig-
nal, absolute humidity sensor signal, key strobe signal,
relay driving signal for oven function and indicator
signal.
nal, absolute humidity 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)
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.
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
5) Buzzer Circuit
The buzzer is responsive to signals from the LSI to emit
audible sounds (key touch sound and completion
sound).
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, grill heating element, convec-
tion heating element, convection motor, fan motor,
turntable motor, damper motor, touch control trans-
former and light the oven lamp.
tion heating element, convection motor, fan motor,
turntable motor, damper motor, touch control trans-
former and light the oven lamp.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD10 - LD19).
LD10 - LD19).
9) Indicator Circuit
This circuit consists 40-segments and 16-common
electrodes using a Liquid Crystal Display.
The Liquit Crystal Display (LCD) is drived by LCD
driver IC3.
electrodes using a Liquid Crystal Display.
The Liquit Crystal Display (LCD) is drived by LCD
driver IC3.
10) Temperature Measurement Circuit : (OVEN
THERMISTOR)
The temperature in the oven cavity is sensed by the
thermistor. The variation of resistance according to
sensed temperature is detected by the temperature
measurement circuit and the result applied to LSI.
The LSI uses this information to control the relay
and display units.
The temperature in the oven cavity is sensed by the
thermistor. The variation of resistance according to
sensed temperature is detected by the temperature
measurement circuit and the result applied to LSI.
The LSI uses this information to control the relay
and display units.
11) Damper Switch
A switch to tell the LSI if the damper is open or
close.
close.
12) Absolute Humidity Sensor Circuit (For only R-
963(SL)M/(W)M)
This circuit detects the humidity of the food which is
being cooked, to control its automatic cooking.
This circuit detects the humidity of the food which is
being cooked, to control its automatic cooking.
6-4. After approximately 3 seconds, the display shows "STAND COVER".
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
If the above is proper, the AH sensor is probably defective.
R1,R2 : 22
Ω
±
1% 1/2W
R3 : 4.3k
Ω
±
5% 1/4W
R4 : 1M
Ω
±
5% 1/4W
Sensor Dummy Resistor Circuit
Plunger
NC
NO
COM
COM
NO
NC
R3
R4
R1
R2
1
2
3
F-1
F-2
F-3
To connector (F)
on Control Unit.
on Control Unit.
CONNECTOR
TEST PROCEDURES
R-953/963M - 20
1
AN0
IN
Terminal not used. (For only R-953(SL)M/(W)M)
1
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 the LSI. (For only R-963(SL)M/(W)M)
is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI. (For only R-963(SL)M/(W)M)
2
P77
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
3
P76
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
4-5
P75-P74
OUT
Terminal not used.
6
P73
IN
Signal coming from touch key.
When any one of G9 line keys on key matrix is touched, a corresponding signal
from P10, P11, P12, P13, P14, P15, P16 and P17 will be input into P73. When no
key is touched, the signal is held at "L" level.
When any one of G9 line keys on key matrix is touched, a corresponding signal
from P10, P11, P12, P13, P14, P15, P16 and P17 will be input into P73. When no
key is touched, the signal is held at "L" level.
7
P72
IN
Signal similar to P73.
When any one of G10 line keys on key matrix is touched, a corresponding signal
will be input into P72.
When any one of G10 line keys on key matrix is touched, a corresponding signal
will be input into P72.
8
P71
IN
Signal similar to P73.
When any one of G11 line keys on key matrix is touched, a corresponding signal
will be input into P71.
When any one of G11 line keys on key matrix is touched, a corresponding signal
will be input into P71.
9
P70
IN
Signal similar to P73.
When any one of G12 line keys on key matrix is touched, a corresponding signal
will be input into P70.
When any one of G12 line keys on key matrix is touched, a corresponding signal
will be input into P70.
10-11
P57-P56
OUT
Terminal not used.
12
P55
OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven
cavity reaches the preset
temperature in the preheating mode,
or when the preheating hold time (30
minutes) is elapsed.
temperature in the preheating mode,
or when the preheating hold time (30
minutes) is elapsed.
13-17
P54-P50
OUT
Terminal not used. (For only R-953(SL)M/(W)M)
13-17
P54-P50
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor). (For only
R-963(SL)M/(W)M)
R-963(SL)M/(W)M)
18
P47
OUT
Terminal not used.
19
P46
IN
Input signal which communicates the damper open/close information to LSI.
Damper opened; "H" level signal (0V:GND).
Damper closed; "L" level signal (-5V:VC).
Damper closed; "L" level signal (-5V:VC).
20
P45
OUT
Terminal not used.
21
P44
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 signal turns to "H" level
and "L" level in repetition
according to the power level.
(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 signal turns to "H" level
and "L" level in repetition
according to the power level.
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
cro cooking
(a. 32second time base)
ON/OFF time ratio in Mi-
cro cooking
(a. 48second time base)
cro cooking
(a. 48second 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.
MICRO
ON
OFF
COOK
100%
48 sec.
0 sec.
70%
36 sec. 12 sec.
50%
26 sec. 22 sec.
30%
16 sec. 32 sec.
10%
8 sec. 40 sec.
A
B
C
H: GND
L
0.12 sec
2.4 sec
1.2 sec
1.2 sec
DESCRIPTION OF LSI
R-953/963M - 21
Pin No.
Signal
I/O
Description
22
INT1
OUT
Terminal not used.
23
INT0
IN
Signal to synchronized LSI with commercial power source frequency(50Hz).
This is basic timing for time processing
of LSI.
This is basic timing for time processing
of LSI.
24
CNVSS
IN
Connected to VC.
25
RESET
IN
Auto clear terminal.
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. Thereafter
set at "H" level.
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. Thereafter
set at "H" level.
26
P41
IN/OUT
Memory (EEPROM) data input/output.
27
P40
OUT
Memory (EEPROM) clock out.
28
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.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
29
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
Output to control oscillation input of XOUT.
30
VSS
IN
Power source voltage: -5V.
VC voltage of power source circuit input.
VC voltage of power source circuit input.
31
P27
OUT
Grill (TOP) heating element driving signal.
To turn on and off the grill heating
element relay (RY3). "L" level during
grill cooking, convection cooking or
dual cooking, "H" level otherwise.
The heater relay turns on and off
within a 48 second time base in
accordance with the special program
in LSI.
element relay (RY3). "L" level during
grill cooking, convection cooking or
dual cooking, "H" level otherwise.
The heater relay turns on and off
within a 48 second time base in
accordance with the special program
in LSI.
32
P26
OUT
Convection heating element driving signal.
To turn on and off the relay (RY4). "L"
level during grill cooking, convection
cooking or dual cooking, "H" level
otherwise.
The heater relay turns on and off within
a 48 second time base in accordance
with the special program in LSI.
To turn on and off the relay (RY4). "L"
level during grill cooking, convection
cooking or dual cooking, "H" level
otherwise.
The heater relay turns on and off within
a 48 second time base in accordance
with the special program in LSI.
33
P25
OUT
Oven lamp and turntable motor driving signal(Square Waveform : 50Hz).
To turn on and off shut-off relay (RY1).
The square waveform voltage is
delivered to the relay (RY1) driving
circuit.
The square waveform voltage is
delivered to the relay (RY1) driving
circuit.
34
P24
OUT
Convection motor driving signal.
To turn on and off shut-off relay(RY7). "L"
level during convection or dual cooking "H"
level otherwise. (Relay RY7 does not turn on
at preheating mode.)
To turn on and off shut-off relay(RY7). "L"
level during convection or dual cooking "H"
level otherwise. (Relay RY7 does not turn on
at preheating mode.)
35
P23
OUT
Fan motor driving signal.
To turn on and off the fan motor relay RY6. "L"
level during cooking, or for 5 minutes after grill
cooking or for a while after convection or dual
cooking. "H" level otherwise.
To turn on and off the fan motor relay RY6. "L"
level during cooking, or for 5 minutes after grill
cooking or for a while after convection or dual
cooking. "H" level otherwise.
Power output
ON time
OFF time
100 %
48 sec.
0 sec.
90 %
44 sec.
4 sec.
80 %
40 sec.
8 sec.
70 %
36 sec.
12 sec.
60 %
32 sec.
16 sec.
50 %
26 sec.
22 sec.
40 %
22 sec.
26 sec.
30 %
16 sec.
32 sec.
20 %
12 sec.
36 sec.
10 %
8 sec.
40 sec.
Power output
ON time
OFF time
100 %
48 sec.
0 sec.
90 %
44 sec.
4 sec.
80 %
40 sec.
8 sec.
70 %
36 sec.
12 sec.
60 %
32 sec.
16 sec.
50 %
26 sec.
22 sec.
40 %
22 sec.
26 sec.
30 %
16 sec.
32 sec.
20 %
12 sec.
36 sec.
10 %
8 sec.
40 sec.
20 msec.
H : GND
L (-5V)
During cooking
L
H
20 msec.
ON
OFF
During
cooking
L
GND
H.
(Convection or dual cooking)
ON
OFF
During cooking or for awhile after
grill convection or dual.
grill convection or dual.
L
GND
H.
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
DESCRIPTION OF LSI
R-953/963M - 22
36
P22
OUT
Terminal not used.
37
P21
OUT
Damper motor relay driving signal.
To turn on and off shut-off relay (RY8).
To turn on and off shut-off relay (RY8).
38
P20
OUT
Touch control transformer driving signal.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 2 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 2 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
39
P17
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G8 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G8 line key on matrix is touched.
40
P16
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G7 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G7 line key on matrix is touched.
41
P15
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G6 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G6 line key on matrix is touched.
42
P14
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G5 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G5 line key on matrix is touched.
43
P13
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G4 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G4 line key on matrix is touched.
44
P12
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G3 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G3 line key on matrix is touched.
45
P11
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G2 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G2 line key on matrix is touched.
46
P10
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G1 line key on matrix is touched.
Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal
while one of G1 line key on matrix is touched.
47-52
P07-P02
OUT
Terminal not used.
53-54
P01-P00
OUT
Data output terminal to LCD driver IC3.
55-62
P37-P30
OUT
Data output terminal to LCD driver IC3.
63-66
P87-P84
OUT
Data output terminal to LCD driver IC3.
67-70
P83-P80
IN
Input terminal to change the specification of model.
71
VCC
IN
Connected to GND.
72
VREF
IN
Connected to GND.
73
AVSS
IN
Connected to VC.
74-76
AN7-AN5
IN
Heating constant compensation terminal.
77
AN4
OUT
Terminal not used.
78
AN3
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the
thermistor, this input is converted into temperature by the A/D converter built into
the LSI.
By inputting DC voltage corresponding to the temperature detected by the
thermistor, this input is converted into temperature by the A/D converter built into
the LSI.
79
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.
80
AN1
IN
Terminal not used. (For only R-953(SL)M/(W)M)
80
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. (For only R-963(SL)M/(W)M)
This input is an analog input terminal from the AH sensor circuit, and connected
to the A/D converter built into the LSI. (For only R-963(SL)M/(W)M)
Pin No.
Signal
I/O
Description
ON
OFF
L
GND
H.
LSI(IXA034DR)
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
The I/O signal of the LSI(IXA034DR) are detailed in the following table.
DESCRIPTION OF LSI
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