LG NB3532A - Page 21

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