LG BH9530TW Service Manual page 31

DIGITAL DISPLAY & MEDIA TRAINING MASTER
4-3. Humming/Clicking Noise
The unit is making a humming noise or a clicking noise.
Does the noise only
happen when a disc
is playing?
YES
Does the noise happen
when the BD is turned on?
4-4. Audio/Video Out of Synch
The audio and video do not match up. People look to be talking, but their voices are delayed by a few seconds.
Has the customer tried
multiple tapes and discs?
YES
How are the cables
routed?
YES
Has the customer
connected to another TV?
BD's make a slight hum when playing discs.
A clicking noise or a noise interfering with audio may indicate a problem.
NO
Try multiple discs. Multiple discs with the same issue
means the BD may need service or be professionally cleaned.
Check BD service for service instructions.
Check to see if a disc is inserted into the BD and eject the disc.
NO
A humming or clicking noise when the disc is not inserted
may be a cooling fan. Check OM to see if cooling fan is present.
If not, unit will need service. See BD service for service instructions.
If the issue only shows up on one disc, then the problem is
NO
with that disc. Have the customer try multiple tapes or discs.
If the issue happens on multiple discs and tapes,
then ask the customer to try a lens or a head cleaner.
Make sure audio and video cables are routed to the same source
NO
(if possible). Routed audio and video to separate products
can cause a bit of a delay between the devices as not all devices
will process audio and video signals at the same speed.
Ask the customer to connect the product to another TV.
NO
If the issue persists, try another set of cables. If the issue still persists,
then the issue is with the unit. The unit will need service.
Arrange service following proper procedure.
2-16
Make sure cables are routed properly.