LC-52XS1E/RU/LC-65XS1E/RU
4 – 1
LC-52XS1E
Service Manual
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] Power supply Troubleshooting
No power supplied (Front LED does not turn on). Power switched on but no power supplied. (Front LED does not turn Red
→
Green)
YES
Are the power cord connector correctly connected to the body?
NO
Reconnect the power cord correctly and switch on the power
again.
YES
Is connector AC/AC2 of the AC Inlet unit (RUNTKA485WJQZ: 52/
RUNTKA491WJQZ: 65) connected normally?
NO
Reconnect the AC Inlet unit correctly and switch on the power
again.
[MAIN-POWER UNIT]
RDENCA304WJQZ
YES
Is a main fuse (F7601, F7602) normal?
NO
When the fuse cuts even if the main fuses are exchanged and the
power supply is turned on again.
Check (C7901, DS7901, C7901, IC7901) of the BU5V primary
side in the MAIN power unit
YES
Please check the PS_ON signal line of IC7002 (SUB-MICON) 67
pin on IF board.
NO
Please check whether BU5V is normally outputted to pin 6 and 7
of PD connector (CN7101)?
NO
Please check whether there is parts which are out of order on
BU5V lines, or a shorting circuit.
YES
YES
Please check whether about parts out of order on the BU5V line
or the short-circuited circuits.
YES
NO
Please check the power circuit of a BU5V line system.
T7901, D7101, PC7901, PC7902, C7102, IC7101,
D7904, IC7901
Please remove the part that breaks down or is short-circuited,
and, check it again.
Please check whether exchange fuses and a power supply is
turned on again.
NO
Please check whether UR15V is normally output to pin 1 and 2 of
PE connector (CN7001).
NO
Is the fuse (F7802, F7803) normal?
YES
YES
Please check whether about parts out of order on the UR15V line
or the short-circuited circuits.
YES
NO
Please check the power circuit of a UR15V line system.
T7801, D7001, PC7801, PC7802, C7002, IC7001,
Q7810, Q7812, IC7803
Please remove the part that breaks down or is short-circuited,
and, check it again.
A MAIN-power supply unit is normal. When still amusing, please
improve connection of harness and a B/B connector.
YES
LED-PANEL-power source
[SUB1/2/3-POWER UNIT]
Check each voltage about RDENCA305/6/7WJQZ described in
the next page and survey an abnormal location.