Sharp LC-42LD266K (serv.man3) Service Manual ▷ View online
45
LC-42LD264
LC-42LD265
LC-42LD266
LC-42LD265
LC-42LD266
Prefix text
Model
SHARP_2K14_MT5561_NUCLEUS_EU_
TPV OEM 50/42LD264/265, 32LD164/165 series (
EU
)
SHARP_2K14_MT5561_NUCLEUS_UK_
TPV OEM 50/46/42LD266, 32LD166 series (
UK
)
SHARP_2K14_MT5561_NUCLEUS_EU_2G_
TPV OEM 46LD264/265 series (
EU_2G
)
Example:
a)
SHARP_2K14_MT5561_NUCLEUS_EU_
V0.42.1_20131214.pkg : for SHARP EU
b)
SHARP_2K14_MT5561_NUCLEUS_UK_
V0.42.1_20131214.pkg : for SHARP UK
c)
SHARP_2K14_MT5561_NUCLEUS_EU_2G_
V0.42.1_20131214.pkg : for SHARP EU_2G
V. TV’s LED will flash during upgrade process, after finished upgrade process, TV will
reboot by itself.
VI. Remove USB disk from TV.
VII. Check if the software version is correct.
(Menu
Setup Version Info)
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46
LC-42LD264
LC-42LD265
LC-42LD266
LC-42LD265
LC-42LD266
TROUBLESHOOTING
11. 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
Is the audio signal output of IC U401 normal?
NO
Check IC U401 and its peripheral circuits.
Is audio signal input to pin (21/26/27/28) of IC U601 (AMP)?
NO
Check the line between IC U401 and IC U601.
Is MUTE circuit [A_MUTE] normal?
Is the audio signal output of pin (1,2) (R) and pin (3,4) (L) of
CN601(AOUDIO-CONNECTOR) normal?
CN601(AOUDIO-CONNECTOR) normal?
NO
Check the A_MUTE. (D601 etc.)
NO
Check IC U601 and its peripheral circuits.
Check Speaker (right and left) and wire harness.
Are the power cord and harness in the unit properly connected?
NO
Connect the power cord and harness properly, and turn on the
power.
power.
Is F9901/F9902 normal?
NO
LINE_FILTER_UNIT:
Isn't NR9901, NR9902,L9901,L9903,etc. out of order? Moreover,
whether the short-circuit with the circumference circuit is
checked.
POWER_UNIT:
BD9901, FB9901,FB9902, FB9810, D9801, etc. out of order?
Moreover, whether the short-circuit with the circumference circuit
is checked.
Isn't NR9901, NR9902,L9901,L9903,etc. out of order? Moreover,
whether the short-circuit with the circumference circuit is
checked.
POWER_UNIT:
BD9901, FB9901,FB9902, FB9810, D9801, etc. out of order?
Moreover, whether the short-circuit with the circumference circuit
is checked.
Is a voltage of 12V applied to pin (2,3) of connector (CN902)?
(Set the main power SW to ON.)
(Set the main power SW to ON.)
Does the switching circuit operate normally?
Check circuit around the primary side (IC9301, T9301,
D9307,D9304,D9305,etc.), the secondary side (D9308, L9304,
ZD9303,IC9303 etc.), and the protection circuit.
Check circuit around the primary side (IC9301, T9301,
D9307,D9304,D9305,etc.), the secondary side (D9308, L9304,
ZD9303,IC9303 etc.), and the protection circuit.
.
NO
Are 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 (IC9101,T9101, Q9101,
Q9102, etc.), the secondary side (D9115,
D9116 ,L9105,L9106etc.), and the protection circuit.
Check circuit around the primary side (IC9101,T9101, Q9101,
Q9102, etc.), the secondary side (D9115,
D9116 ,L9105,L9106etc.), and the protection circuit.
Is B1+ output? (Set the main power SW to ON.)
Does the PFC circuit operate normally?
(IC9801, Q9801, L9801 and etc. And, the circuit around the
protection circuit etc. is checked.)
(IC9801, Q9801, L9801 and etc. And, the circuit around the
protection circuit etc. is checked.)
NO
47
LC-42LD264
LC-42LD265
LC-42LD266
LC-42LD265
LC-42LD266
No sound (during the reception of TV broadcasting)
Does not the sound go out though the picture has come out when TV is received?
MAIN UNIT:
YES
YES
No sound from external input devices (1)
Does not the sound of the audio signal input to (Component) go out?
MAIN UNIT:
YES
YES
No sound from external input devices (2)
Does not the sound of the audio signal input to (Composite, Y/C) go out?
MAIN UNIT:
YES
YES
Is the DIF signal output from pin (5/6) of Tuner (TU101)?
NO
Check the tuner and its peripheral circuits. Replace as required.
Refer to No sound output in all modes.
Is the audio signal properly sent to pin (9)(YPbPr1L_In) and pin
(12)(YPbPr1R_In) of CN116?
(12)(YPbPr1R_In) of CN116?
NO
Check the connection to CN116and the external input device.
Refer to No sound output in all modes.
Is the audio signal properly sent to pin (V20) (YPBPR_L_IN) and
pin (R17) (YPBPR_R_IN) of IC U401?
pin (R17) (YPBPR_R_IN) of IC U401?
NO
Check the line between CN116and IC U401.
Is the audio signal properly sent to pin (9)(YPbPr1L_In) and pin
(12)(YPbPr1R_In) of CN116?
(12)(YPbPr1R_In) of CN116?
NO
Check the connection to CN116 and the external input device.
Refer to No sound output in all modes.
Is the audio signal properly sent to pin (V20) (YPBPR_L_IN) and
pin (R17) (YPBPR_R_IN) of IC U401?
pin (R17) (YPBPR_R_IN) of IC U401?
NO
Check the line between CN116 and IC U401.
Is the DIF signal sent to pin (Y19/W18) of IC U401?
NO
Check IC U401 its peripheral circuits.
48
LC-42LD264
LC-42LD265
LC-42LD266
LC-42LD265
LC-42LD266
No sound from external input devices (3)
Does not the sound of the audio signal input to (SCART) go out?
MAIN UNIT:
YES
YES
No sound from external input devices (4)
Does not the sound of the audio signal input to (HDMI1/2) go out?
YES
The audio signal is not output(1)
No sound from HEADPHONE_OUTPUT terminal.
TEREMINAL UNIT:
YES
YES
The audio signal is not output(2)
No sound from SPDIF_OUTPUT terminal.
TEREMINAL UNIT:
NO
Is the audio signal properly sent to pin (2) (SCT1_AUR_IN) and pin
(6) (SCT1_AUL_IN) of CN151?
(6) (SCT1_AUL_IN) of CN151?
NO
Check the connection to CN151 and the external input device.
Refer to No sound output in all modes.
Is the audio signal properly sent to pin (U20) (SCART1_L_IN) and
pin (R20) (SCART1 R IN) of IC U401?
pin (R20) (SCART1 R IN) of IC U401?
NO
Check the line between CN151 and IC U401.
Is the HP_DET# signal input into pin (F17) of IC U401 from pin (6)
of a headphone terminal (CN602)?
NO
Check the connection to CN602 and the external input device.
Check IC U401 and its peripheral circuits.
Is the audio signal output from IC U401 pin (T18) andpin (U19) sent
to pin (2)( HPOUT_LT) and pin(3)( HPOUT_RT) of headphone
terminal CN602?
NO
Check the line between IC U601 and CN602.
Refer to No sound output in all modes.
Is picture of the signal input from HDMI 1/2 displayed?
NO
Refer to Does not the picture of the HDMI signal input to
HDMI1/2 go out?.
HDMI1/2 go out?.
Is the SPDIF_OUT signal output from pin (R4) of IC U401 to pin
(1)of connector(CN603)?
NO
Check the connection to SPDIF_OUT and external devices.
Check IC U401 and its peripheral circuits.
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