LG FA162 Service Manual

3-7
ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
FLD display check
Refer to
SMPS troubleshooting.
Check CN102 assembly.
OK
OK
OK
IC100 Pin3 --> Pin3 STB
Pin4 --> Pin1 CLK
Check data output.
Check
Pin2 --> DO --> DATA input.
When 3.3 VA fails,
check D100 SDB0540 input
and output power.
F1+, F2- both terminals: over 3.7 V
Check power VKK: over -30 V.
Replace the related part.
Replace the related part.FLD light on?
Replace the related part.
Check
CN103 Pin1, 2, 3
power.
NO
NO
NO
NO
NO
NO
NO
Check
power of each Pin.
Check
the related part.
Check
the related part.
Check
IC101 --> IC301
DATA communication
Pin3 --> Pin3 STB
Pin2 --> Pin2 DO
Pin4 --> Pin1 CLK
Check
IC301 MC3501 power
Pin50 VKK : -30 V
Pin9, 51 : +3.3 VA
Check
CN102 connection
condition and power F1+, F2-
both terminals: over 3.7V
Check power VKK: over -30V
Check Pin25: 3.3VA
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
2. FLD DISPLAY CHECK
OK

LG FA162 Specifications

General

Karaoke	No
Speaker type	-
RMS rated power	160 W
Number of speakers	2
Equalizer	Yes
Tuner type	Digital
Supported radio bands	AM, FM
Preset stations quantity	50
Type	Home audio micro system
Product color	Black
Playback disc formats	CD audio
Audio formats supported	MP3, WMA
USB 2.0 ports quantity	1
Apple docking compatibility	Not supported
Power source	AC