Samsung RR39M7 Series Service Manual page 90

TROUBLESHOOTING
- 1 BOARD
Door & MICOM state
DOOR S/W
Close
Open
MICOM state
DOOR
Close
Open
Q710(Top), Q708(Right), Q706(Left)
CN710 #5, #6 Pin(Top),
Connector CN710 #3, #4 Pin(Right),
CN710 #1, #2 Pin(Left)
0V(Low)
5V(High) 10~12V(High)
MIC01 #1
0V(Low)
5V(High)
F or R
#1
0V(Low)
5V(High)
0V(Low)
Start
DOOR S/W works normal
(Open/Close).
Yes
MIC01 MICOM #50, #51,#52
output voltage is normal.
Yes
The voltage output
between pins CN710 # 1, # 3, # 5
and GND is normal.
Yes
Voltage Output at the
MAIN PCB Connector (CN710) is
normal (10~12V).
Yes
The LED Lamp is
connected properly.
Yes
LED Lamp is normal.
Yes
Normal
90
No
Check and Replace the Reed S/W &
Magnet Ass'y.
No
Replace / Repair the PCB.
No
Replace the PCB.
No
Check the Connector Terminal /
Replace the PCB.
No
Check the Connector Terminal.
No
Replace the LED Lamp.