Read Sharp LC-52XS1E (serv.man4) Service Manual online
LC-52XS1E/RU/LC-65XS1E/RU
4 – 12
The color of back light is abnormal.-1
The whole back light is reddish.
LED 27V has not gone out, and it checks it sequentially.
Check whether there is any abnormal or connection error of a
LED-PANEL array.
LED-PANEL array.
YES
Are 27V input to LA1/2/3 pin(1) (2) (3) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
YES
Have 27V come out in output connector (CN5-8) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
NO
NO
Are 27V output to (1) (2) pin of the LA1 connector of
SUB1_POWER-UNIT?
SUB1_POWER-UNIT?
Check whether there is any part which 27V line opens within
POWER-DISTRIBUTION-UNIT
POWER-DISTRIBUTION-UNIT
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
NO
If 27V of SUB1_POWER-UNIT does not come out, 20V stops
coming out.
Check the IC5101A feedback circuit and the peripheral circuit.
coming out.
Check the IC5101A feedback circuit and the peripheral circuit.
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
The color of back light is abnormal.-2
The whole back light is bluish.
LED 20V has not gone out, and it checks it sequentially.
Check whether there is any abnormal or connection error of a
LED-PANEL array.
LED-PANEL array.
YES
Are 20V input to LA1/2/3 pin (5) (6) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
YES
Have 20V come out in output connector (CN5-8) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
NO
NO
Are 20V output to (5) (6) pin of the LA1 connector of
SUB1_POWER-UNIT?
SUB1_POWER-UNIT?
Check whether there is any part which 27V line opens within
POWER-DISTRIBUTION-UNIT
POWER-DISTRIBUTION-UNIT
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
NO
Check 20V generation circuit of SUB1_POWER-UNIT.
(IC5003,Q5007,IC5101B)
(IC5003,Q5007,IC5101B)
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
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