Troubleshooting - Samsung MM-16 Service Manual

Micro component system
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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
(RQ705) & fuse normal
No
and soldering
of SCON1-UCON1
No
Replace RQ702,RQ703
No
Replace RQ701
Connection
are normal
Check Voltage at RIC1
Yes
6-1

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