3. Buzzer Drive Condition Check
4. Open Door Detection Circuit Check
- 28 -
OFF
IC1 ( )
0 V
IC1 ( )
0 V
Measure-
ment Location
Condition
0 V
5 V
0 V
5 V
0.5 s
0.5 s
2.63 kz (Beep~)
OFF
0.05 s
0.1 s
0.2 s
2 s
0 V
5 V
0 V
5 V
2.63 kz
(Ding~)
2.21 kz
(Dong~)
(PIN NO.63 & PIN NO.8)
Closed
5 V
Open
0 V
Freezer/
Refrigerator Door
Measurement
Location
FREEZER DOOR
SWITCH
REFRIGERATOR DOOR
SWITCH
A
B
Tone (Ding~Dong~) when the button on
the display is pushed.
Alarm for open door
(beep-beep-beep)
Summary of Contents for LRDC20731ST
Page 9: ...3854JK1006A GY GRIS GRAY 3854JK1006B GY GRIS GRAY 5 CIRCUIT DIAGRAM 9 ...
Page 36: ...8 5 MAIN PWB ASSEMBLY AND PARTS LIST 8 5 1 Main PWB Assembly 36 ...
Page 37: ...8 5 2 Replacement Parts List 37 ...
Page 38: ...8 5 3 PWB Assembly Display And Parts List 38 SW106 Dispenser Model Best Model ...
Page 63: ...P No 3828JL8005A November 2004 Printed in Mexico ...