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32" AUDIO
TROUBLESHOOTING
Low DTV audio
Problem: Digital TV audio is at a lower level than analog TV.
Resolution: Install firmware version 3.13 or newer.
Auto volume up
Problem: The volume suddenly goes up when the TV is turned on.
Resolution: Most likely changing the control panel PCB will fix the problem. Also check the connection
on the main PCB.
Video but no sound
Problem: Partial or no sound. Resolution: First, check the menus to make sure the speakers are not
turned off. Try different sources. If all sources have no sound, change the PCB that handles audio
(normally the main PCB, jackpack PCB on new models with cable card support). Also check all
connectors and cables.
Resolution: If only digital audio (from HDMI or Optical input) is missing, the input device doesn't
support Dolby digital or the TV needs an updated main PCB. There are a few 2005 models that did
not process digital audio properly and audio processing was updated during production. In this
case, changing the Jackpack PCB will remedy the problem.
No sound
Check Sound supply :
A_board P804 #1 18V
Check output
to the Speaker :
Dose P601 No.1 waveform
exist?
Replace Speaker
Directview LCD Training
Measure
A_power board trans output:
18V at power_board
FAIL
CN803 #1
PASS
Check
If A_board 18V
is short-circuited.
Resistance btween A_board
P821 Pin No.2
and 3 infnity?
Replace A_board
FAIL
33
CIRCUIT DESCRIPTIONS
Replace power board
FAIL
Replace A_board
PASS
Circuit Descriptions
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Table of Contents
Troubleshooting
