Troubleshooting; Main; Power Malfunction; Lcd Lamp Is On - Samsung SCM-6700 Service Manual

6. Troubleshooting

6-1 Main

6-1-1 Power Malfunction

LCD lamp is ON

Yes
Pins 73,31 of
UIC1(LC72362)
is at 5V
Yes
Voltages at
RQ702,RQ703
are normal
Yes
Voltage at
RQ701 is normal
Samsung Electronics
No
Power Transistor &
fuse normal
No and soldering
of SCON1-FCW2
Voltages at RQ1,RQ2 and
No
RFR1 are normal
No
Replae RQ701
Connection
are normal
Check Voltage at RIC1
Yes
6-1