Document: After-sales Maintenance Service Manual No.: L32R63*VKE/L40R63*VKE/L43R63*VKE/L49R63*VKE Version: 1.0 Effective from: APRIL 4th, 2016
Page 7 of 49
7. Poor sound
Poor sound refers to without sound or with noise; check whether
the selection of sound system is proper
Switch to other audio input, check whether DVD
input and PC main board input has sound
No sound for other inputs; check the sound
amplifier and the shared control circuit
No sound; check whether remote control mute is
selected and switch sound system
There is sound for other inputs, replace TV tuner
or control chip
NO
YES
YES
NO
8. No VGAinput signal
VGA signal input does not respond, the screen prompts “Please input signal”,
check whether PC signal source and signal line is normal.
Check VGA signal input board and see whether
the row and field sync signal protection diode is
broke down
Replace the motherboard or
factory reset is normal
Replace PC or signal line, check
display VGA plug for looseness
Replace the 5.6V Zener diode
on the motherboard
NO
YES
YES
NO
L32R63_VKE,L40R63_VKE,L43R63_VKE,L49R63_VKE_CIS_Russia.indd 7
2016-04-05 오전 11:00:48
