Samsung MM-18 - Troubleshooting; Amplifier Troubleshooting

Yes
No
Yes
No
Yes
No
No
Yes
LCD lamp is ON
Power Transistor
(UQ901) & fuse normal
Pins73,31 of
UIC1(LC72362)
is at 5V
Connection
and soldering
of SCON1,2
are normal
Voltages at
RQ701,RQ702
are normal
Replace RQ701,RQ702
Voltages at
RQ703 is normal
Replace RQ703 Check Voltage at RIC1
Samsung Electronics 6-1
6. Troubleshooting
6-1 Amplifier
6-1-1 Power Malfunction
mm18 3/23/98 3:47 PM Page 1