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12. TROUBLE SHOOTING GUIDE
12.1. Simple check
No Picture,no sound
Blank screen
No sound
Poor sound
No picture in some channel
No
color
for some
program(black and white)
Spots with some or all pictures
Horiaontal/vertical bars or picture
shaking
Television out of control
12.2 Power Supply Board failure check
State:No power
First,check cables which connect with PSU,then check as follows
1) Check PSB input voltage（AC input）
voltage : ～120V
connector:CN7
2）Check PSB output voltage orderly：
Verify if the television is properly plugged
Verify if the television is properly supplied power
Verify if electricity is available
Verify if correct signals are input
Press INPUT button to change signal input to TV input
Restart the television of power supply is interrupted
Press Mute button and verify if Mute mode is set.
Switch to otger channel and verify if the same problem happens.
Press VOL+ button to see of he problem can be solved.
Verufy if sound system is correct .Refer to some chapter for
adjust.
Verify if correct channel is selected.
Adjust the antenna.
Make adjustments by Fine Tune and MANUAL Scan.
Verify if the same problem exists in other channels.
channel
check out of picture and sound system.
Refer to relative instructions in the Manual for color adjust.
Verify if the antennal is correctly connected.
Verify if the antennal is in good condition.
Make fine adjustment of channel.
Check for local interference such as an electrical appliance or
power tool.
Disconnect the television from power supply and 10 seconds
later,connect the television to the power supply.If the problem still
exists,contact authorized
assistance.
after-sales service for technical
43
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