6-1-2 FM No Sound
6-1-3 AM No Sound
Yes
No
Yes
No
No
Voltages at
IIC1(LA1851N) and semi
conductors tuner section
are normal
Voltages at power supply
section
Check TUNER PACK B+
Voltage at FET are
normal
Replace FET
Check pump charge circuitry(OQ5,
IQ2) connection or soldering of
SCON1-UCON1, FCON1 soldering
of pin 77 of LC72362
Yes
No
No
Check pump charge circuitry
(OQ5,OQ4) connection of SCON1,
UCON1 soldering of pin77
of LC72362N
Yes
Voltage
at LA1851N(IIC1) and tuner
semi conductors are normal
(Refer to Schematic Diagram)
Voltage between
Check loop antenna soldering and
connection of OL1, OL2, OT1,OT2, IT2
Check voltage at power
supply section
VT: AM(MW)
Low coverage 0.9V 0.1
LW Low coverage 0.7V 0.1
6-2
Samsung Electronics
Troubleshooting
mm18 3/23/98 3:47 PM Page 2
Summary of Contents for MM-18
Page 8: ...Remote Control mm18 10 3 23 98 2 48 PM Page 2 ...
Page 55: ...10 PCB Diagrams 10 1 Main Samsung Electronics 10 1 mm18 5 3 23 98 4 26 PM Page 1 ...
Page 56: ...10 2 SUB Front Power Mic PCB Diagrams 10 2 Samsung Electronics mm18 5 3 23 98 4 26 PM Page 2 ...
Page 57: ...10 3 CD PCB Diagrams Samsung Electronics 10 3 mm18 5 3 23 98 4 26 PM Page 3 ...
Page 58: ...11 Wiring Diagram Samsung Electronics 11 1 mm18 5 3 23 98 4 36 PM Page 1 ...
