LC-32LE40E-LC-42LE40E
41
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
Power unit operation check.
↓
LINE_FILTER_UNIT:
↓
YES
POWER_UNIT
↓
YES
↓
YES
↓
YES
The sound is not emitted from the speaker though the picture has come out.
↓
No sound output in all modes?
TERMINAL UNIT:
↓
↓
YES
↓
YES
↓
YES
↓
YES
Are the power cord and harness in the unit properly connected?
NO
Connect the power cord and harness properly, and turn on the
power.
Is F9901/F9902 normal?
NO
LINE_FILTER_UNIT:
Isn't NR9901,NR9902,IC9901,L9901,L9902(32
”
)/L9903(42
”
),etc.
out of order? Moreover, whether the short-circuit with the
circumference circuit is checked.
POWER_UNIT:
BD9901, FB9901, (FB9902, FB9906, D9101)(32
”
)/(FB902,
FB9801, D9801)(42
”
) etc. out of order? Moreover, whether the
short-circuit with the circumference circuit is checked.
Is B+_main(32”)/B1+(42”) output? (Set the main power SW to ON.)
Does the PFC circuit operate normally?
The circuit around the protection circuit etc. is checked.
NO
Is a voltage of +5.2V applied to pin (2,3) of connector
(CN9304(32
”
)/CN907(42
”
))?
(Set the main power SW to ON.)
Does the switching circuit operate normally?
Check circuit around the primary side (IC9301, T9301,
D9303(32
”
)/D9307(42
”
),etc.), the secondary side ((D9302,
L9301, ZD9316)(32
”
)/(D9308, L9304, ZD9103(42
”
), etc.), and
the protection circuit.
NO
Are 12 and 24V output as for the power on/off switch when it is on?
NO
Does the inverter circuit operate normally?
Check circuit around the primary side (IC9103, T9101, Q9101,
etc.)(32
”
)/(IC9101, T9101, Q9101, Q9102)(42
”
), the secondary
side ((IC9101, D9102, D9103)(32
”
)/(IC9302, D9115,
D9116)(42
”
), etc.), and the protection circuit.
Is the audio signal output of IC U401 normal?
NO
Check IC U401 and its peripheral circuits.
Is audio signal input to pin (15/20/21/22) of IC U602 (AMP)?
NO
Check the line between IC U401 and IC U602.
Is MUTE circuit [AMP_MUTE_LINE, POWERUP_LINE] normal?
Is the audio signal output of pin (1,2) (R) and pin (3,4) (L) of
CN601(AOUDIO-CONNECTOR) normal?
NO
Check the AMP_MUTE_LINE and POWERUP_LINE. (Q652,
Q653 etc.)
NO
Check IC U602 and its peripheral circuits.
Check Speaker (right and left) and wire harness.
Summary of Contents for AQUOS LC-42LE40E
Page 6: ...LC 32LE40E LC 42LE40E 6 2 OPERATION MANUAL Remote Control ...
Page 7: ...LC 32LE40E LC 42LE40E 7 TV Front TV Side Rear ...
Page 11: ...LC 32LE40E LC 42LE40E 11 3 DIMENSIONS ...
Page 40: ...LC 32LE40E LC 42LE40E 40 ...
Page 62: ...LC 32LE40E LC 42LE40E 62 2 DETAILED ICS INFORMATION 3 1 U401 MT5366CAOU B Block Diagram ...
Page 63: ...LC 32LE40E LC 42LE40E 63 Pin Connections and Short Description ...
Page 67: ...LC 32LE40E LC 42LE40E 67 3 5 U501 TMDS251PAGR Block Diagram ...
Page 68: ...LC 32LE40E LC 42LE40E 68 Pin Connections and Short Description ...
Page 71: ...LC 32LE40E LC 42LE40E 71 3 7 U4053 ICL3232ECV Pin Connections and short description ...
Page 151: ...LC 32LE40E LC 42LE40E 151 2 CABINET PARTS LC 32LE40E ...
