Daewoo KOR-616T2S Service Manual page 37

Condition
Display does
not show
program ming
at all, even
if button key is
pressed
NOTE
: Before following the particular steps listed above in the trouble shooting guide for failure,
please check for the continuity of each wire-harness between the tact switch keyboard
and PCB assembly.
KEYBOARD CHECK PROCEDURE
1. Type of encoding and key names
0
q
CN101
The tact switch keyboard consists of 9 keys whose aconfigurations are described above.
2. Key check procedure
To determine if the tact switch keyboard is defective or not, check the continuity of each button contacts
with a multimeter.
1) CLOCK button: Between 7 and 10
2) STOP/CLEAR button: Between 8 and 10
3) LESS button: Between 9 and 10
4) DEFROST button: Between 12 and 10
5) POWER button: Between 14 and 10
Check
Check each button
for continuity the
tach switch deyboard
as the following
keyboard check
procedure.
7
STOP
CLOCK
CLEAR
MORE START
Result
Normal
Normal
9
8
DEFROST
LESS
AUTO
COOK
6) MORE button: Between 7 and 11
7) START button: Between 8 and 11
8) AUTO COOK button: Between 12 and 11
9) +1 min button: Between 14 and 11
36
Cause
Malfunction of
touch control
circuity of control
box
main-assembly
Malfunction of
touch control
circuitry of control
box sub-assembly
r
w
POWER
+1 min
Remedy
Replace
control box
main
assembly
Replace
control box
sub-assembly