Sharp R930cs Service Manual

							19
R-930CS
PTOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter
and ohmmeter.
In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key
Unit,   and troubleshooting by unit replacement is described according to the symptoms indicated.
Before testing,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
1.  Key Unit.
NOTE ;
1) Check Key unit ribbon connection before replacement.
2) Reconnect all leads removed from components during testing.
3) Re-install the outer case (cabinet).
4) Reconnect the power supply cord after the outer case is installed.
5) Run the oven and check all functions.
The following symptoms indicate a defective key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the Key unit is defective.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Replace the Key unit.
5) Reconnect all leads removed from components during testing.
6) Re-install the outer case (cabinet).
7) Reconnect the power supply cord after the outer case is installed.
8) Run the oven and check all functions.
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
9. Open the door and block it open.
10.Discharge high voltage capacitor.
11.Reconnect all leads removed from components during testing.
12.Re-install the outer case (cabinet).
13.Reconnect the power supply cord after the outer case is installed.
14.Run the oven and check all functions.
The following test procedure should be carried out with the microwave oven is a fully assembled
condition (outer case fitted).
It is difficult to measure the exact temperature in the convection oven. An accurate thermocouple type
temperature tester must be used. A low priced bi-metal type thermometer is not reliable or accurate.
The temperature should be checked with outer case cabinet installed, approx. 5 minutes after preheat
temperature is reached (audible signal sounds four times). The temperature experienced may be
approx. 30ûF more or less than indicated on the display, however, in most cases the food cooking results
will be satisfactory.
Difference in power supply voltage will also affect the oven temperature. The Household power supply
voltage may sometimes become lower than the rated voltage (120 V) and cause under-cooking. If the
power supply voltage is 10% lower than the rated voltage, longer cooking time is required by 10% to 20%.
OCHECKING TEMPERATURE IN THE CONVECTION MODE 
						

							20
R-930CS
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
2. Control Unit
The following symptoms  indicate a defective control unit.  Before replacing the control unit, perform
the Key unit test (Procedure Q) to determine if control unit is faulty. Reconnect the power supply cord.
And  check for followings.
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f ) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
When testing is completed,
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Reconnect all leads removed from components during testing.
5) Re-install the outer case (cabinet).
6) Reconnect the power supply cord after the outer case is installed.
7) Run the oven and check all functions.
QKEY UNIT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4.  If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
is making good contact, verify that the door sensing switch (stop switch) operates properly; that is the
contacts are closed when the door is closed and open when the door is open. If the door sensing
switch (stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control
unit and make sure the door sensing switch is closed (either close the door or short the door sensing
switch connecter). Use the Key unit matrix indicated on the control panel schematic and place a
jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact.
If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the
control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond,
the above method may be used (after clearing the control unit) to determine if the control unit or key
pad is at fault.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord
after the outer case is installed.
8. Run the oven and check all
functions.
G 1 G 2 G 3 G 4G 5 G 6 G 7 G 8 G 9 G10 G11 G12Stop
Clear Sensor
ReheatLow Mix
Bake Slow
Cook
Custom
HelpKitchen
TimerPower
LevelClock Minute
PlusCompu
DefrostCompu
BroilCompu
RoastCompu
BakeBroil Sensor
Cook
Popcorn
350˚F 375˚F 400˚F 425˚F 450˚F67890
100˚F 150˚F 275˚F 300˚F 325˚F12345Convec Preheat
Start
Touch On
High Mix
Roast 
						

							21
R-930CS
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
6. After that procedure, re-connect the power supply cord.
7. Remove the outer case and check voltage between Pin Nos. 7 and 9 of the 9 pin connector (A) on
the control unit with an A.C. voltmeter. The meter should indicate 120 volts, if not check oven circuit.
Shut-off, Cook and Heater Relays Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation or
convection cooking condition.
DC. voltage indicated ............... Defective relay.
DC. 
voltage not indicated ........... Check diode which is connected to the relay coil. If diode is good,
control unit is defective.
 
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 Approx. 19.0V D.C. Oven lamp / Turntable motor
RY2 (COOK) Approx. 18.0V D.C. Power transformer
RY3 (HEATER) Approx. 18.0V D.C. Heating element
RY4 Approx. 19.0V D.C. Damper motor
RY5 Approx. 19.0V D.C. Convection motor
RY6 Approx. 19.0V D.C. Cooling fan motor
8. Disconnect the power supply cord, and then remove outer case.
9. Open the door and block it open.
10.Discharge high voltage capacitor.
11.Reconnect all leads removed from components during testing.
12.Re-install the outer case (cabinet).
13.Reconnect the power supply cord after the outer case is installed.
14.Run the oven and check all functions.
RRELAY TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the Compu Defrost pad twice and touch the number pad 5. And then touch the
start pad.
(3) The oven is in Compu Defrost cooking condition.
(4) The oven will operate as follows
WEIGHT 1ST STAGE 2ND STAGE 3RD STAGE 4TH STAGE
LEVEL TIME LEVEL TIME LEVEL TIME LEVEL TIME
0.5lbs 70% 47sec. 0% 52sec. 50% 32sec. 30% 40sec.
(5) If improper operation is indicated, the control unit is probably defective and should be checked.
SCOMPU DEFROST TEST
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on
the PWB, this foil pattern acts as a fuse.
1. Foil pattern check and repairs.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
TPROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN. 
						

							22
R-930CS
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
3) Discharge high voltage capacitor.
4) Follow the troubleshooting guide given below for repair.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 Only pattern at a is broken. *Insert jumper wire J1 and solder.
2 Pattern at a and b are broken. *Insert the coil RCILF2003YAZZ between c and d.
5) Make a visual inspection of the varistor.
Check for burned damage and examine the
transformer with a tester for the presence of
layer short-circuit (check the primary coil
resistance which is approximately 175W ±
10%). If any abnormal condition is detected,
replace the defective parts.
6) Reconnect all leads removed from components during testing.
7) Re-install the outer case (cabinet).
8) Reconnect the power supply cord after the outer case is installed.
9) Run the oven and check all functions.
2. Follow the troubleshooting guide given below, if indicator does not light up after above check and
repairs are finished.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 The rated AC voltage is not present to power Check supply voltage and oven power cord.
terminal of CPU connecter (CN-A).
2 The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
8) Disconnect the power supply cord, and then remove outer case.
9) Open the door and block it open.
10) Discharge high voltage capacitor.
11) Reconnect all leads removed from components during testing.
12) Re-install the outer case (cabinet).
13) Reconnect the power supply cord after the outer case is installed.
14) Run the oven and check all functions.
357 93
26
CN - A VRS1
CONV M FAN M POWER(J1)T1 P
a
c d
b
UAH SENSOR TEST
Checking the initial sensor cooking condition
WARNING : The oven should be fully assembled before following procedure.
(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 95ûF (35ûC).
(3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the ÒINSTALLATION
INSTRUCTIONSÓ of the operation manual.
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To 
						

							23
R-930CS
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
permit adequate ventilation, be sure to install so as not to block these vents. There should be some
space for air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture
with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be
at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapor given of by the spray and turn off before food is properly cooked.
(8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
WARNING : The oven should be fully assembled before following procedure.
Make sure the oven has been plugged in at least two minutes before checking sensor cook operation.
The cabinet should be installed and screws tightened.
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch SENSOR COOK pad and then touch the number pad 1. And touch Start pad. Now, the oven
is in the sensor cooking condition and BAKED POTATO will appear in the display.
(5) The oven will operate for the first 16 seconds, without generating microwave energy.
When the AH sensor is defective (open or short), Error will appear in the display after 16 seconds
cleaning time. If ERROR appears, check sensor wire connecting and/or AH sensor.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of
sensor cooking.
(6) After approximately 16 seconds, microwave energy is produced, and the display should start to count
down the remaining cooking time and oven should turn off after water is boiling (bubbling).
If the oven does not turn off, replace the AH sensor or check the control unit, refer to explanation below.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor.
(1) Disconnect the power supply cord, and then remove outer case.
(2) Open the door and block it open.
(3) Discharge high voltage capacitor.
(4) Remove the AH sensor.
(5) Install the new AH sensor.
(6) Reconnect all leads removed from components during testing.
(7) Re-install the outer case (cabinet).
(8) Reconnect the power supply cord after the outer case is installed.
(9) Check the sensor cook operation as follows:
9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
9-2. Place the container on the center of tray in the oven cavity.
9-3. Close the door.
9-4. Touch SENSOR COOK pad and then touch the number pad 1. And touch Start pad.
9-5. The control panel is in automatic Sensor operation.
9-6. The display will start to count down the remaining cooking time, and the oven will turn off
automatically after the water is boiling (bubbling).
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation
below.
CHECKING CONTROL UNIT
(1) Disconnect the power supply cord, and then remove outer case.
(2) Open the door and block it open.
(3) Discharge high voltage capacitor.
(4) Disconnect the sensor connector that is mounted to control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Disconnect the leads to the primary of the power transformer.
(7) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape. 
						

							24
R-930CS
TEST PROCEDURES
PROCEDURE
LETTERCOMPONENT TEST
(8) After that procedure, re-connect the power supply cord.
(9) Check the sensor cook operation proceed as follows:
9-1. Touch SENSOR COOK pad and then touch the number pad 1. And touch Start pad.
9-2. The control panel is in the sensor cooking operation.
9-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
condition is same as judgement by AH sensor.
9-4. After approximately 3 seconds, the display shows Ò X X . X X Ò which is the remaining cooking
time, and the display count down.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
(10) Disconnect the power supply cord, and then remove outer case.
(11) Open the door and block it open.
(12) Discharge high voltage capacitor.
(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.
(14) Carry out necessary repair.
(15) Reconnect all leads removed from components during testing and repairing.
(16) Re-install the outer case (cabinet).
(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all
functions.
(18) Carry out Water load cooking test again and ensure that the oven works properly.
R1, R2 : 22
W ± 1% 1/2W
R3 : 4.3k
W ± 5% 1/4W
R4 : 1M
W ± 5% 1/4W
Plunger
NC
NO
COM
COMNO
NC
R3 R4 R1
R2 1
2
3 F-1
F-2
F-3To connector (F)
on Control Unit.
CONNECTOR
Sensor Dummy Resistor Circuit 
						

							25
R-930CS
The touch control section consists of the following units
as shown in the touch control panel circuit.
(1) Key Unit
(2) Control Unit
The principal functions of these units and the signals com-
municated among them are explained below.
Key Unit
The key unit is composed of a matrix, signals P10 - P17
generated in the LSI are sent to the key unit.
When a key pad is touched, a signal is completed through
the key unit and passed back to the LSI through R24 - R27
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, temperature
measurement circuit, absolute humidity sensor circuit and
indicator 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.
2) Power Source Circuit
This circuit generates the voltages necessary for the
control unit from the AC line voltage.
3) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit. It incorporates a very small error because it works
on commercial frequency.
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
4) ACL Circuit
A circuit to generate a signals which resetting the LSI to
the initial state when power is applied.
5) Buzzer Circuit
The buzzer is responds to signals from the LSI to emit
noticing sounds (key touch sound and completion sound).
6) 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.
7) Absolute Humidity Sensor Circuit
This circuit detects the humidity of a food which is being
cooked, to control its automatic cooking.
8) Door Sensing Switch
A switch to inform the LSI if the door is open or closed.
9) Relay Circuit
To drive the magnetron, heating element, fan motor,
convection motor, damper motor, turntable motor and
light the oven lamp.
10) Indicator Circuit
Indicator element is a Fluorescent Display.
Basically, a Fluorescent Display is triode having a cathode,
a grid and an anode. Usually, the cathode of a Fluorescent
Display is directly heated and the filament serves as
cathode.
The Fluorescent Display has 8-digits, 16-segments are
used for displaying figures.
DESCRIPTION OF LSI
LSI(IZA797DR):
The I/O signals of the LSI(IZA797DR) are detailed in the following table.
Pin No. Signal I/O Description
1 VCC IN Connected to GND.
2 VEE IN
Anode (segment) of Fluorescent Display light-up voltage: -30V.
Vp voltage of power source circuit input.
3 AVSS IN
Power source voltage: -5V.
VC voltage of power source circuit input.
4 VREF IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V) 
						

							26
R-930CS
VARI MODE ON TIME OFF TIME
P-HI (100% power) 32 sec. 0 sec.
P-90 (approx. 90% power) 30 sec. 2 sec.
P-80 (approx. 80% power) 26 sec. 6 sec.
P-70 (approx. 70% power) 24 sec. 8 sec.
P-60 (approx. 60% power) 22 sec. 10 sec.
P-50 (approx. 50% power) 18 sec. 14 sec.
P-40 (approx. 40% power) 16 sec. 16 sec.
P-30 (approx. 30% power) 12 sec. 20 sec.
P-20 (approx. 20% power) 8 sec. 24 sec.
P-10 (approx. 10% power) 6 sec. 26 sec.
P-0 (0% power) 0 sec. 32 sec.
Pin No. Signal I/O Description
5 AN7 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.
6 AN6 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.
7-9 AN5-AN3 INHeating constant compensation terminal.
10 AN2 IN
Input signal which communicates the door open/close information to LSI.
Door closed; H level signal(0V).
Door opened; L level signal(-5V).
11 AN1 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).
12 AN0 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.
13 P55 OUT
Digit selection signal.
The relationship between digit signal and digit are as follows;
Digit signalDigit
P03 ........................... 1st.
P02 .......................... 2nd.
P01 ........................... 3rd.
P00 ........................... 4th.
P37 ........................... 5th.
P36 ..........................  6th.
P35 ..........................  7th.
P55 ..........................  8th.
Normally, one pulse is output in every §
period, and input to the grid of the Fluores-
cent Display.
14 P54 OUT
Oven lamp and turntable motor driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay(RY1).
The square waveform voltage is delivered to
the relay(RY1) driving circuit.
15 P53 OUTConvection motor driving signal.
To turn on and off shut-off relay(RY5). L
level during CONVECTION; H level other-
wise.
16 P52 OUT
Cooling fan motor driving signal.
To turn on and off shut-off relay(RY6). L
level during both microwave and convection
cooking; H level otherwise.
17 P51 OUT
Magnetron high-voltage circuit driving
signal.
To turn on and off the cook relay(RY2). In
P-HI operation, the signals holds L level
during microwave cooking and H level
while not cooking. In other cooking modes
(P-90, P-80, P-70, P-60, P-50, P-40, P-30,
P-20, P-10, P-0) the signal turns to H
level and L level in repetition according
to the power level.
P03 ß(60Hz)H
L
GND
VP
P02
P01
P00
P37
P36
P35
P55
During cookingL
H16.7 msec.
ONOFF During
cooking
LGND H.(Convection)
ONOFF
During
cooking
LGND
H. 
						

							27
R-930CS
Pin No. Signal I/O Description
18 P50 OUT
Damper motor relay driving signal.
To turn on and off shut-off relay(RY4).
19 P47 OUTHeating element driving signal.
To turn on and off shut-off relay(RY3). L level
during convection cooking; H level otherwise. Dur-
ing convection cooking, the signal becomes H level
when the temperature of the oven cavity exceeds the
predetermined temperature.
20-21 P46-P45 OUT Terminal not used.
22 P44 OUT
Timing signal output terminal for temperature measurement(OVEN THERMIS-
TOR).
H level (GND) : Thermistor OPEN timing.
L level (-5V) : Temperature measuring timing.(Convection cooking)
23 P43 OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven cav-
ity reaches the preset temperature in
the preheating mode, or when the
preheating hold time (30 minutes) is
elapsed.
24 P42 OUT
Timing signal output terminal for temperature measurement(OVEN).
H level (GND) : Thermistor OPEN timing.
L level (-5V) : Temperature measuring timing.(Convection cooking)
25 INT1 IN
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time
processing of LSI.
26 P40 IN Connected to GND.
27 RST 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.
28/29XCIN/XCOUTOUT Terminal not used.
30 XIN IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XOUT terminal.
31 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
32 VSS IN
Power source voltage: -5V.
VC voltage of power source circuit input.
33 P27 IN
Signal coming from touch key.
When any one of G-1 line keys on key matrix is touched, a corresponding signal from
P10 - P17 will be input into P27. When no key is touched, the signal is held at L level.
34 P26 IN
Signal similar to P27.
When any one of G-2 line key on key matrix is touched, a corresponding signal will be
input into P26.
35 P25 IN
Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will be
input into P25.
36 P24 IN
Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will be
input into P24.
ONOFFH : GND
L
ONOFF During
cooking
LGND H.
(Convection)
A
B
C
H: GND
L 0.1 sec
2.0 sec
1.0 sec
1.0 sec
16.7 msec.H : GND
L (-5V) 
						

							28
R-930CS
Pin No. Signal I/O Description
37 P23 OUTSegment data signals.
The relation between signals and indicators are as follows:
SignalSegmentSignalSegmentSignalSegmentSignalSegment
P23 ............. P1 P17 ............. P5 P13 ............. P9 P07 ........... P13
P22 ............. P2 P16 ............. P6 P12 ........... P10 P06 ........... P14
P21 ............. P3 P15 ............. P7 P11 ........... P11 P05 ........... P15
P20 ............. P4 P14 ............. P8 P10 ........... P12 P04 ........... P16
38-40 P22-P20 OUT
Segment data signal.
Signal similar to P23.
41 P17 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-12 line keys on key matrix is touched.
42 P16 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-11 line keys on key matrix is touched.
43 P15 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-10 line keys on key matrix is touched.
44 P14 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-9 line keys on key matrix is touched.
45 P13 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-8 line keys on key matrix is touched.
46 P12 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-7 line keys on key matrix is touched.
47 P11 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-6 line keys on key matrix is touched.
48 P10 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while
one of G-5 line keys on key matrix is touched.
49-53 P07-P03 OUT
Segment data signal.
Signal similar to P23.
54-56 P02-P00 OUT
Digit selection signal.
Signal similar to P55.
57-59 P37-P35 OUT
Digit selection signal.
Signal similar to P55.
60-64 P34-P30 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).