JVC AV-29FH1BUG, Service Manual

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15
TROUBLESHOOTING
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n GENERAL
n PICTURE
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No picture or sound.
The following are normal and are NOT malfunctions:
l When touching the picture tube surface, you might feel a slight charge of static electricity. This is because the picture tube contains
static electricity; it does not affect the human body.
l The TV may emit a crackling sound due to a sudden change of temperature. There is no problem unless the picture or sound is
abnormal.
l When a still, bright image (of a white dress, for example) appears on the screen, the image may be coloured. This problem occurs in all
picture tubes, and as the bright image disappears, the colour also disappears.
l This TV is equipped with a microcomputer that may operate abnormally due to interference from external equipment. If this happens,
turn off the main power and disconnect the power cord from the AC socket. Then reconnect the power cord to the AC socket and turn on
the main power again.
l
×
f the plug is disconnected from the AC socket, or the TV aerial has problems, you may think there is a problem with the TV itself. Be
sure to check the following before calling for service.
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l Review all instruction in this manual
n SOUND
The TV cannot be turned on.
l Insert the plug in an AC socket.
l Turn the main power on. (See page 3)
l The buttons on the front panel of the TV will not work if the CHILD LOCK
is operating (see FEATURES menu, on page 11). Use the POWER
button on the remote control to turn the TV on.
l Check aerial connections. (See page 3).
l Select the correct input source (See page 14).
l Change the SYSTEM setting manually (see Manual Channel Tuning on
pages 5/6).
The TV shuts off automatically.
l Did you set the SLEEP function? (See page 10).
l If the broadcast signal is not present for about 30 minutes, the set will be
automatically turned off.
l For safety reasons, the TV will automatically turn off if no operations are
made within approximately 3 hours after the TV is turned on with the
WAKE UP function.
The TV turns on automatically.
l Did you set the WAKE UP function? (See page 11).
Inoperable remote control.
l Replace the batteries. (See page 3).
l Insert the batteries correctly. (See page 3).
l Use the remote control within about 7 metres of the TV.
Poor colour.
l Change the SYSTEM setting manually (see Manual Channel Tuning on
pages 5/6).
l Move any external equipment away until the interference is eliminated.
l
Reposition the aerial.
Lines or streaks in picture
(interference)
l Reposition the aerial.
l Replace with an aerial with better directionality.
Spots (crosstalk)
l Reposition the aerial.
l Replace with an aerial with better directionality.
Double pictures (ghosts)
l Check aerial connections.
l Redirect the aerial.
l Replace or repair the aerial.
Snowy pictures (noise)
l Disconnect the headphones.
No sound from the TV's
speakers
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