Troubleshooting Flow Chart - Polaroid FXM-3211C Service Manual

3.

Troubleshooting Flow Chart

START
Power on
N
Does LED
change color?
Y
N
Does Backlight
power on?
Y
N
Does OSD
appear?
Y
N
Does Remote
Control work?
Y
N
Does the TV
display signals?
Y
N
Does sound
play as
expected?
Y
Perform Auto
Channel Search
from the OSD
A
1. Check connection between Power Board and Main Board
2. Check Power Board output voltage
1. Check connection between Power Board and LCD Module
2. Check Main Board J32 Backlight Control
1. Check LVDS connector
1. Check connection between Remote Board and Main Board
2. Check ATMAGE8 pin 23
3. Check the remote receiver and transfer circuit
1. For Tuner sources, verify the cable has signal and has a
good connection to the TV
2. For other sources, check the jack for damage
3. Check switch chip FSAV330, FSAV331 relevant circuit
4. For Y/Pb/Pr, RGB, Y/C check MST9883 signal output and
input circuit
1. Check cable connections including internal COAX pin
2. Check AMP TDA8932 circuit
3. Check switch chip CD4052 relevant circuit
4. Check AP8206 relevant circuit
5. Check mute control between ATMAGE8 and AMP
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