LG NB3532A Service Manual page 21

RECEIVER BAR TROUBLESHOOTING
1-2. SYSTEM PART
Power On
YES
"WELCOME"
Display on FLD
OK?
NO
IC101
3 V_MICOM, 3.3 V
OK?
X101
20.000 MHz
OK?
Replace
IC100 UPD78F1165.
3V_MICOM,
FL(+), FL(-)
OK?
3401_RX,
3401_CLK, 3401_STB
OK?
IC301
Data Output to VFD
OK?
Check VFD.
3-8
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check IC801 and SMPS.
Replace X100.
MAIN board
Check D804, IC802
& SMPS.
Check CN303.
Replace IC301 (FLD Driver).
FRONT board