General Electrical Fault Analysis Process - Daewoo L32R63 VKE Series Maintenance Service Manual

Document: After-sales Maintenance Service Manual
II General Electrical Fault Analysis Process
1. No power
YES
Check +5V and +12V output from embedded
power supply for abnormity
YES
Check +5V and +12V on main board for
YES
Check for open-loop of fuse, or replace main
2. Without light
When the indicator is on but there is no display, check remote control for power-off, minimum brightness,
contrast ratio, check high-voltage switchboard controlled by main board for abnormity
YES
Check the fuse on high-voltage board for the
YES
Replace high-voltage switchboard
L32R63_VKE,L40R63_VKE,L43R63_VKE,L49R63_VKE_CIS_Russia.indd 4
No.: L32R63*VKE/L40R63*VKE/L43R63*VKE/L49R63*VKE
Check 220V power supply voltage and the contact of power
socket Check AC (220V) voltage and the contact of CN101 socket.
abnormity
board
supply of 12V
Replace power cord or power socket
Abnormal output voltage +5V and +12V from
embedded power supply, replace embedded
power supply with the same model
Check main board of power supply for
looseness, open-loop and poor contact
Check each triode of control part for abnormity
or replace main board
Page 4 of 49
Version: 1.0 Effective from: APRIL 4th, 2016
NO
NO
NO
NO
NO
Check fuse
2016-04-05 오전 11:00:48