LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
6 – 1
LC32LE700E
ServiceManual
CHAPTER 6. TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
<POWER BLOCK: 32 inch models>
No power supply (Front LED does not light up) and no power-up even if turned on (Front LED light up).
Is the wire harness in the unit properly connected? NO Reconnect and recheck the wire harness.
YES
Are F7001 and F7002 normal? NO Are L7004, L7001,L7002,BD7001 etc. faulty?
Check if the peripheral circuits are short-circuited.
YES
Is BU+5V supplied from pin(11) of connector CN7003 when the
power switch is turned off?
NO Check the peripheral circuits,
IC7101, T101, C7401, C7403, PC7008, etc ⋅ ⋅ ⋅.
YES
Is the PS_ON signal sent to pin(10) of connector CN7003 when
the power switch is turned on
NO Check pin(59) of IC2002(UCON) on MAIN PWB.
YES
Is the AC_DET signal sent to pin(9) of connector CN7003 when
the power switch is turned on?
NO Check the peripheral circuits,PC7007, Q7004, PC7002,etc.
YES
Is a DC voltage of approx. 400V applied to both ends of C7015? NO Does the PFC circuit normally work?
(Check IC7002, L7003, TH7001, IC7001, Q7005, Q7006etc. and
the peripheral circuits.)
YES
Is UR13V supplied from pins(1-4) of connector CN7003 when the
power switch is turned on?
NO Check the peripheral circuits
(T7002, D7051, L7051, PC7001)
YES
Is PNL12V supplied from pins(1-2) of connector CN7004 when
the power switch is turned on?
NO Check the peripheral circuits (U7053, etc ⋅ ⋅ ⋅)
YES
Is 144V supplied from pins(2,4,6) of CN7007 and
pins(2,4,6,8,10,12) of CN7006 when the power switch is turned
on?
NO Check the peripheral circuits,
T7501, D7501, C7501, FA5511,etc ⋅ ⋅ ⋅.
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General
Weight and Dimensions
