Daewoo DWF-7588TE, Service Manual

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43 42
EEPROM UNIT
1)CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
In contrast with mask ROM, EEPROM which enable WRITE/READ by program, memorize data even
during POWER is OFF.
• EEPROM PIN FUNCTION
EEPROM stores the selected contents in MEMORY course and LOAD SENSING data.
If you press MEMORY button, MICOM read the contents in MEMORY course and L.E.D displays the
selected contents in MEMORY course.
3) CAUTION FOR A/S
1. When the selected contents of MEMORY course in EEPROM can not memorize, EEPROM is
defective.
M
I
C
O
M
SO0,1
SI0,2
SCK0,3
SO1,4
RA4 103J
1,CS
R9
10K
Ω
C6,104Z
2,CLK
4,DO
3,DI
GND,5
6
VDD,8
BUSY,7
IC2 EEPROM
TC89101P
PIN NAME FUNCTION
Chip selector
CS Chip is enabled when CS is at ‘L’ level.
Set CS to ‘H’ level before executing instruction.
Clock input
CLK The DI data is latched at the rising edge of CLK.
The data is out from DO at the falling edge of CLK.
CLK is enable when CS is at ‘L’ level.
DI Serial data input
The address, command and data input pin.
DO Serial data output
The data output pin
Organization select
ORG The 16-bit organization is selected when ORG is ‘H’ level.
The 8-bit organization is selected when ORG is ‘L’ level.
Status output
RDY/BUSY ‘L’ level is output during program or chip eraise operation.
‘H’ level is output when program or chip eraise operation is completed.
TEMPERATURE SENSOR UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• To use resistor for temperature detection, the value of R43 was decided to the center value of
temperature bandwidth (-20~70°C), that is, resistance of temperature sensor is 51.35 K
Ω
at 25°C.
Therefore the value of R43 was decided to 51.5 K
Ω
, F(1%).
• C15 used electrolytic condensor (1µF) to remove noise and to stabilize the voltage.
3) CAUTION FOR A/S
1. HOW TO CHECK TEMPERATURE SENSOR.( Reference to TEST MODE)
If the L.E.D displays ‘LO’ or ‘HI’, there is some trouble with the temperature sensor.
In this case, the processing is designed to perform normal processing. Before change temperature
sensor, check the connector and temperature sensor.
2. There is function to give up role of temperature sensor forcibly.
At the first condition in TEST MODE press the RESERVATION button. And after change data by
SOAK button, press START/HOLD button.
If so, data input. (11 : perform to temperature sensor, 22 : give up temperature sensor)
3. In the FUZZY course (WASH:14min, RINSE : 2Times, SPIN:5min, COOL WATER SELECTION) the
total processing time can be changed by water temperature.
M
I
C
O
M
R81,1K
Ω
18
C32
1uF
R31
5.4V
SENSOR
51.1K
Ω