Sharp LC-70UD20KN (serv.man4) Service Manual ▷ View online
73
LC-60UD20
LC-70UD20
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
Check the I2C line between IC2601 and IC3301.
䞉
Check the panel module and harness.
䞉
Refer to "No picture on the display (FRC Unit)"
䞉
Regarding Sound , Refer to “No sound from the Speaker & Woofer”
Check the line between IC3301 and SC3801.
Check the FRC Unit and harness.
Check IC3301 and SC3801 and their peripheral circuits in Main Unit.
Check IC3301 and SC3801 and their peripheral circuits in Main Unit.
Are pins of IC2601 accessed to pins of IC3301 by IC2 ?
IC2601 : [112 / HDMI_SW_SCL]
[113 / HDMI_SW_SDA]
IC3301 : [AN12 / CPU_OSCL0]
[AP12 / CPU_OSDA0]
IC2601 : [112 / HDMI_SW_SCL]
[113 / HDMI_SW_SDA]
IC3301 : [AN12 / CPU_OSCL0]
[AP12 / CPU_OSDA0]
Do TMDS signals input to pins of IC3301 (CPU)?
[AH34, AH35 / TMDS_RX_CLK-,+]
[AG34, AG35 / TMDS_RX_D0-,+]
[AG36, AG37 / TMDS_RX_D1-,+]
[AF34, AF35 / TMDS_RX_D2-,+]
[AH34, AH35 / TMDS_RX_CLK-,+]
[AG34, AG35 / TMDS_RX_D0-,+]
[AG36, AG37 / TMDS_RX_D1-,+]
[AF34, AF35 / TMDS_RX_D2-,+]
Do TMDS signals input to pins of IC2701 respectively.
[12,13 / SW_TMDS_TX1_CLK-,+]
[04,05 / SW_TMDS_TX1_D0-,+]
[07,08 / SW_TMDS_TX1_D1-,+]
[09,10 / SW_TMDS_TX1_D2-,+]
[12,13 / SW_TMDS_TX1_CLK-,+]
[04,05 / SW_TMDS_TX1_D0-,+]
[07,08 / SW_TMDS_TX1_D1-,+]
[09,10 / SW_TMDS_TX1_D2-,+]
Do TMDS signals output from pins of IC2701 respectively.
[26,25 / SPLIT_TMDS_TX2_CLK-,+]
[35,34 / SPLIT_TMDS_TX2_D0-,+]
[32,31 / SPLIT_TMDS_TX2_D1-,+]
[29,28 / SPLIT_TMDS_TX2_D2-,+]
[26,25 / SPLIT_TMDS_TX2_CLK-,+]
[35,34 / SPLIT_TMDS_TX2_D0-,+]
[32,31 / SPLIT_TMDS_TX2_D1-,+]
[29,28 / SPLIT_TMDS_TX2_D2-,+]
Check the IC2601 and peripheral circuits.
Check the line between IC2701and IC2601.
Check the IC2701 and peripheral circuits.
Is the signal output from IC3301 (CPU) respectively?
[AT4, AU4 / VBO_TXA+ , -]
[AP3, AR3 / VBO_TXB+ , -]
[AT2, AU2 / VBO_TXC+ , -]
[AR1, AR2 / VBO_TXD+ , -]
[AT4, AU4 / VBO_TXA+ , -]
[AP3, AR3 / VBO_TXB+ , -]
[AT2, AU2 / VBO_TXC+ , -]
[AR1, AR2 / VBO_TXD+ , -]
Do TMDS signals output from pins of IC2601 respectively.
[14,12 / SW_TMDS_TX1_CLK-,+]
[11,09 / SW_TMDS_TX1_D0-,+]
[08,06 / SW_TMDS_TX1_D1-,+]
[05,03 / SW_TMDS_TX1_D2-,+]
[14,12 / SW_TMDS_TX1_CLK-,+]
[11,09 / SW_TMDS_TX1_D0-,+]
[08,06 / SW_TMDS_TX1_D1-,+]
[05,03 / SW_TMDS_TX1_D2-,+]
No picture on the display (14)
Does not the picture / sound of the HDMI-1/2/3/4 go out?
Check the line between IC3301 and IC2701.
Check IC3301 and its peripheral control circuits.
(IC2002, IC3501, IC3502, IC3503, IC3504, X3301, etc.)
(IC2002, IC3501, IC3502, IC3503, IC3504, X3301, etc.)
Do above-mentioned signals input to connector (SC3801) ?
[20,21 / VBO_TXA+/-]
[17,18 / VBO_TXB+/-]
[14,15 / VBO_TXC+/-]
[11,12 / VBO_TXD+/-]
[20,21 / VBO_TXA+/-]
[17,18 / VBO_TXB+/-]
[14,15 / VBO_TXC+/-]
[11,12 / VBO_TXD+/-]
Is the FRC Unit connected?
VBO_LOCKN (40pin) of SC3801 become Low if there is no problem
in the connection.
VBO_LOCKN (40pin) of SC3801 become Low if there is no problem
in the connection.
74
LC-60UD20
LC-70UD20
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YES
NO
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YES
(A)
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
NO
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YES
(B)
NO
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YES
NO
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YES
NO
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YES
䞉
Refer to "No picture on the display (FRC Unit)"
䞉
Regarding Sound , Refer to “No sound from the Speaker & Woofer”
Check the I2C line between IC2601 and IC3301.
Do TMDS signals input to pins of IC3301 (CPU) respectively?
[AH34, AH35 / TMDS2_RX_CLK-,+]
[AG34, AG35 / TMDS2_RX_D0-,+]
[AG36, AG37 / TMDS2_RX_D1-,+]
[AF34, AF35 / TMDS2_RX_D2-,+]
Do TMDS signals input to pins of SC3801 (LW) respectively?
[37,36 / TMDS1_CLK-,+]
[34,33 / TMDS1_D0-,+]
[31,30 / TMDS2_D1-,+]
[28,27 / TMDS2 D2-,+]
[AH34, AH35 / TMDS2_RX_CLK-,+]
[AG34, AG35 / TMDS2_RX_D0-,+]
[AG36, AG37 / TMDS2_RX_D1-,+]
[AF34, AF35 / TMDS2_RX_D2-,+]
Do TMDS signals input to pins of SC3801 (LW) respectively?
[37,36 / TMDS1_CLK-,+]
[34,33 / TMDS1_D0-,+]
[31,30 / TMDS2_D1-,+]
[28,27 / TMDS2 D2-,+]
Do TMDS signals output from pins of IC2601 respectively.
[28,26 / TMDS_TX0_CLK-,+]
[25,23 / TMDS_TX0_D0-,+]
[22,20 / TMDS_TX0_D1-,+]
[19,17 / TMDS_TX0_D2-,+]
[28,26 / TMDS_TX0_CLK-,+]
[25,23 / TMDS_TX0_D0-,+]
[22,20 / TMDS_TX0_D1-,+]
[19,17 / TMDS_TX0_D2-,+]
Is the pin of SC3801 at "Low"
[40 / VBO_LOCKN]
[40 / VBO_LOCKN]
Check the line between IC3301 and IC2701.
Check the line between SC3801 and IC2701.
Check the line between SC3801 and IC2701.
Do TMDS signals output from pins of IC2601 respectively.
[14,12 / SW_TMDS_TX1_CLK-,+]
[11,09 / SW_TMDS_TX1_D0-,+]
[08,06 / SW_TMDS_TX1_D1-,+]
[05,03 / SW_TMDS_TX1_D2-,+]
[14,12 / SW_TMDS_TX1_CLK-,+]
[11,09 / SW_TMDS_TX1_D0-,+]
[08,06 / SW_TMDS_TX1_D1-,+]
[05,03 / SW_TMDS_TX1_D2-,+]
Do TMDS signals input to pins of IC2701 respectively.
[12,13 / SW_TMDS_TX1_CLK-,+]
[04,05 / SW_TMDS_TX1_D0-,+]
[07,08 / SW_TMDS_TX1_D1-,+]
[09,10 / SW_TMDS_TX1_D2-,+]
[12,13 / SW_TMDS_TX1_CLK-,+]
[04,05 / SW_TMDS_TX1_D0-,+]
[07,08 / SW_TMDS_TX1_D1-,+]
[09,10 / SW_TMDS_TX1_D2-,+]
Do TMDS signals output from pins of IC2701 respectively.
[38,37 / SPLIT_TMDS_TX1_CLK-,+]
[47,46 / SPLIT_TMDS_TX1_D0-,+]
[44,43 / SPLIT_TMDS_TX1_D1-,+]
[41,40 / SPLIT_TMDS_TX1_D2-,+]
[26,25 / SPLIT_TMDS_TX2_CLK-,+]
[35,34 / SPLIT_TMDS_TX2_D0-,+]
[32,31 / SPLIT_TMDS_TX2_D1-,+]
[29,28 / SPLIT TMDS TX2 D2-,+]
[38,37 / SPLIT_TMDS_TX1_CLK-,+]
[47,46 / SPLIT_TMDS_TX1_D0-,+]
[44,43 / SPLIT_TMDS_TX1_D1-,+]
[41,40 / SPLIT_TMDS_TX1_D2-,+]
[26,25 / SPLIT_TMDS_TX2_CLK-,+]
[35,34 / SPLIT_TMDS_TX2_D0-,+]
[32,31 / SPLIT_TMDS_TX2_D1-,+]
[29,28 / SPLIT TMDS TX2 D2-,+]
Check the line between IC2701and IC2601.
Check the IC2701 and peripheral circuits.
Do TMDS signals input to pins of SC3801 (LW) respectively?
[50,49 / TMDS0_CLK-,+]
[47,46 / TMDS0_D0-,+]
[44,43 / TMDS0_D1-,+]
[41,40 / TMDS0_D2-,+]
[50,49 / TMDS0_CLK-,+]
[47,46 / TMDS0_D0-,+]
[44,43 / TMDS0_D1-,+]
[41,40 / TMDS0_D2-,+]
Is the pin of SC3801 at "Low"
[40 / VBO_LOCKN]
[40 / VBO_LOCKN]
Check the IC2601 and peripheral circuits.
Does SPDIF signal output from pin of IC2601 ?
[33/ CH0ASD3]
[33/ CH0ASD3]
Does SPDIF signal input to pin of IC2601 ?
[121 / CH1ASD0]
[121 / CH1ASD0]
Regarding the problem of Right Picture and sound , refer to (A).
Regarding the problem of Left Picture , refer to (B).
Regarding the problem of Left Picture , refer to (B).
Refer to "No picture on the display (FRC Unit)"
Does not the picture(4K UHD)/sound of the HDMI-1/2/3/4 go out?
Check the IC2601 and peripheral circuits.
Check the IC2601 and peripheral circuits.
Check the line between SC3801 and IC2701.
䞉
Check IC3301 and SC3801 and their peripheral circuits in Main Unit.
䞉
Check the connection to FRC Unit
䞉
Check the harness.
No picture on the display (15)
Are pins of IC2601 accessed to pins of IC3301 by IC2 ?
IC2601 : [112 / HDMI_SW_SCL]
䚷 [113 / HDMI_SW_SDA]
IC3301 : [AN12 / CPU_OSCL0]
[AP12 / CPU_OSDA0]
IC2601 : [112 / HDMI_SW_SCL]
䚷 [113 / HDMI_SW_SDA]
IC3301 : [AN12 / CPU_OSCL0]
[AP12 / CPU_OSDA0]
䞉
Check IC3301 and SC3801 and their peripheral circuits in Main Unit.
䞉
Check the connection to FRC Unit
䞉
Check the harness.
Check the IC2601 and peripheral circuits.
75
LC-60UD20
LC-70UD20
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YES
NO
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YES
NO
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YES
Check IC3301 and its peripheral circuits.
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YES
NO
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YES
NO
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YES
Are the signals output from pins of IC9503?
NO
[3,4 / SD_USB_1D-, + ]
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YES
Are the signals input to pins of IC9501?
NO
[3,4 / SD_USB_1D-, + ]
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䊼
YES
Are the signals output from pins of IC9501?
NO
[1,2 / USB1D-, + ]
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YES
Are the signals input to pins of IC3301?
NO
[D37,D36 / USB1D - , + ]
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YES
Check IC3301 and its peripheral circuits.
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NO
YES
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NO
YES
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NO
YES
䊻
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NO
YES
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NO
Check IC3301 and its peripheral circuits.
Check the line between IC9501 and IC9503
Check the peripheral circuits of IC9501?
Check the line between IC3301 and IC9503
Please check SD card Format is FAT / FAT32.
Please check SD card has JPEG files.
Please check SD card has JPEG files.
If SD card is inserted ,
can't "SD/USB media" menu be selected on the Input source?
can't "SD/USB media" menu be selected on the Input source?
Check the line between IC9503 and SC9501(10pin / SW_DET)
Is 0V applied to the pin of IC9503 ?
[10 / SD_CD#]
[10 / SD_CD#]
Check the peripheral circuits of IC9503?
Does not the data from SD Card go out?
Check the interface device and peripheral circuits.
(power-LED of hub, LINK-LED of hub)
(power-LED of hub, LINK-LED of hub)
Check the line between IC3301 and J9401.
(T9401 etc…)
(T9401 etc…)
Does CVBS signal output from pin of EXT1 (SC650) ?
[19 / SC1_V_OUT]
[19 / SC1_V_OUT]
Does the signal in/output to pins of LAN-jack (J9401)?
[1, 2 / MDI0+ , -]
[3, 6 / MDI1+ , -]
[1, 2 / MDI0+ , -]
[3, 6 / MDI1+ , -]
Does CVBS signal output from pin of IC650 ?
[5 / SC1_V_OUT]
[5 / SC1_V_OUT]
Do signals in/output to pins of IC3301(CPU) ?
[AT18, AU18 / MDI0+ , -]
[AT17, AU17 / MDI1+ , -]
[AT18, AU18 / MDI0+ , -]
[AT17, AU17 / MDI1+ , -]
No picture on the display (16)
Check the line between SC650 and IC650 ?
Does not the data from Network go out?
No picture on the monitor
No picture appears on EXT1 connected monitor during the ATV / DTV reception.
No picture on the display (17)
Check the setting of an external input device that connects with EXT1
?
?
Check the peripheral circuits of IC650 ?
Check the line between IC650 and IC3301.
Does CVBS signal input to pin of IC650 ?
[3 / CVBS_TU_OUT]
[3 / CVBS_TU_OUT]
Does CVBS signal output from pin of IC3301(CPU) ?
[AU30 / CVBS_TU_OUT]
[AU30 / CVBS_TU_OUT]
76
LC-60UD20
LC-70UD20
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YES
NO
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YES
NO
䊻
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YES
䊼
䊼
YES
䊼
YES
䊼
YES
䊼
NO
䊼
YES
䊼
YES
䊼
YES
䊼
YES
NO
䊻
䊼
YES
䊼
䊼
YES
䊼
YES
䊼
YES
䊼
NO
䊼
YES
䊼
YES
䊼
YES
䊼
YES
NO
䊻
䊼
YES
䊼
䊼
YES
䊼
YES
䊼
YES
䊼
YES
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NO
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YES
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YES
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YES
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YES
NO
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YES
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NO
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YES
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YES
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YES
NO
䊻
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YES
Complete.
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YES
NO
䊻
䊼
YES
䊼
NO
䊼
YES
䊼
NO
䊼
YES
䊼
YES
䊼
NO
Check the IC9001 and peripheral circuits.
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YES
NO
䊻
䊼
YES
䊼
NO
䊼
YES
䊼
NO
䊼
YES
䊼
NO
䊼
YES
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NO
䊼
YES
䊼
YES
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YES
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YES
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YES
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YES
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YES
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YES
䊼
YES
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YES
䊼
YES
䊼
YES
Go to the section "CLKGEN
operation check."
operation check."
Check the operation of IC7703.
Check the operation of IC7708.
Check the operation of IC7702.
Check the operation of IC7708.
Check the operation of IC7702.
Are the signal (V by One) output from pins of IC9501(FRC) ?
[B13, A13 / FRC_TCON_Vx1_0 -, +] [D14, C14 / FRC_TCON_Vx1_0 -,
+]
[D15, C15 / FRC_TCON_Vx1_2 -, +] [B15, A15 / FRC_TCON_Vx1_3 -,
+]
[B16, A16 / FRC_TCON_Vx1_4 -, +] [D17, C17 / FRC_TCON_Vx1_5 -,
+]
[D18, C18 / FRC_TCON_Vx1_6 -, +] [B18, A18 / FRC_TCON_Vx1_7 -,
+]
+]
[D15, C15 / FRC_TCON_Vx1_2 -, +] [B15, A15 / FRC_TCON_Vx1_3 -,
+]
[B16, A16 / FRC_TCON_Vx1_4 -, +] [D17, C17 / FRC_TCON_Vx1_5 -,
+]
[D18, C18 / FRC_TCON_Vx1_6 -, +] [B18, A18 / FRC_TCON_Vx1_7 -,
+]
[B19, A19 / FRC TCON Vx1 8 -, +] [D20, C20 / FRC TCON Vx1 9 -,
Is VCC_3.3V applied to IC9501?
Is FRC_1.5V applied to IC9501?
Is FRC_2.5V_A applied to IC9501 ?
Is FRC_1.1V_A applied to IC9501 ?
Is FRC_1.1V_CORE, FRC_1.1V_CORE_RS applied to IC9501 ?
Is FRC_1.5V applied to IC9501?
Is FRC_2.5V_A applied to IC9501 ?
Is FRC_1.1V_A applied to IC9501 ?
Is FRC_1.1V_CORE, FRC_1.1V_CORE_RS applied to IC9501 ?
Check the operation of
IC7001/7002 or the main
IC7001/7002 or the main
Check the operation of IC7701.
Is the pin of IC7201 at “Low”?
[56pin / 215_LOCKN_0]
[56pin / 215_LOCKN_0]
Check the line between IC7201 and IC9501 ?
Go to the section “LVC
operation check”.
operation check”.
Check the operation of IC7701.
FRC operation check
Check the line between IC9501 and SC8301/8302 ?
LVC operation check
Check the operation of IC7702
Check the operation of IC7705
Check the operation of IC7709
Check the operation of IC7710
Check the operation of IC7704
Check the operation of IC7705
Check the operation of IC7709
Check the operation of IC7710
Check the operation of IC7704
Is LVC_1.2V applied to IC9001?
Is LVC_2.5V applied to IC9001?
Is VCC_3.3V applied to IC9001 ?
Is LVC_2.5V applied to IC9001?
Is VCC_3.3V applied to IC9001 ?
Is UR+13.V applied to the conector (P8002) ?
[1,2,3 / UR+13V]
[1,2,3 / UR+13V]
Check the power supply cable and the Power Unit.
Are the signals (V by One) output from pins of IC9002(LVC) ?
[AB3, AB4 / LVC_226_Vx1_0 -, +] [Y3, Y4 / LVC_226_Vx1_1 -, +]
[V3, V4 / LVC_226_Vx1_2 -, +] [T3, T4 / LVC_226_Vx1_3 -, +]
[P3, P4 / LVC_226_Vx1_4 -, +] [M3, M4 / LVC_226_Vx1_5 -, +]
[K3, K4 / LVC_226_Vx1_6 -, +] [H3, H4 / LVC_226_Vx1_7 -, +]
[AB3, AB4 / LVC_226_Vx1_0 -, +] [Y3, Y4 / LVC_226_Vx1_1 -, +]
[V3, V4 / LVC_226_Vx1_2 -, +] [T3, T4 / LVC_226_Vx1_3 -, +]
[P3, P4 / LVC_226_Vx1_4 -, +] [M3, M4 / LVC_226_Vx1_5 -, +]
[K3, K4 / LVC_226_Vx1_6 -, +] [H3, H4 / LVC_226_Vx1_7 -, +]
Does the video appear?
Change T-Con Unit
Is the pin of the conector (P8002) at "Low"
[29 / MAIN_226_LOCKN]
[29 / MAIN_226_LOCKN]
Check the line between P8002 and IC7001 ?
(IC7003, Q7001 etc…)
(IC7003, Q7001 etc…)
No picture on the display
(FRC Unit)
Is QVCC_1.8V applied to IC7001/7002?
Check the operation of IC7701.
Check the operation of IC7702.
Check the operation of IC7702.
Are the pins of IC9002 (LVC) at “Low” ?
[AJ27 / LVC_FRC_Vx1_LOCKN0]
[AH27 / LVC_FRC_Vx1_LOCKN1]
[AJ27 / LVC_FRC_Vx1_LOCKN0]
[AH27 / LVC_FRC_Vx1_LOCKN1]
Check the line between IC9002 and IC8501/8502 ?
(Q8504, Q8506, Q8511, Q8512 etc…)
(Q8504, Q8506, Q8511, Q8512 etc…)
Go to the section “FRC operation check”.
Go to the section “FRC
operation check”.
operation check”.
Is QVCC_1.8V applied to IC8501/8502?
Is the pinof IC9501 (FRC) at “Low” ?
[B12 / FRC_TCON_Vx1_LOCKN ]
[B12 / FRC_TCON_Vx1_LOCKN ]
Check the line between IC9501 and SC8302 ?
Is QVCC_1.8V applied to IC7201?
Is VCC_3.3V applied to IC9001 ?
Is VCC_3.3V applied to IC9001 ?
Are the signal (V by One) output from pins of IC9501(FRC) ?
[B13, A13 / FRC_TCON_Vx1_0 -, +] [D14, C14 / FRC_TCON_Vx1_0 -, +]
[D15, C15 / FRC_TCON_Vx1_2 -, +] [B15, A15 / FRC_TCON_Vx1_3 -, +]
[B16, A16 / FRC_TCON_Vx1_4 -, +] [D17, C17 / FRC_TCON_Vx1_5 -, +]
[D18, C18 / FRC_TCON_Vx1_6 -, +] [B18, A18 / FRC_TCON_Vx1_7 -, +]
[B19, A19 / FRC_TCON_Vx1_8 -, +] [D20, C20 / FRC_TCON_Vx1_9 -, +]
[D21, C21 / FRC_TCON_Vx1_10 -, +] [B21, A21 / FRC_TCON_Vx1_11 -, +]
[B22, A22 / FRC_TCON_Vx1_12 -, +] [D23, C23 / FRC_TCON_Vx1_13 -, +]
[D24, C24 / FRC_TCON_Vx1_14 -, +] [B24, A24 / FRC_TCON_Vx1_15 -, +]
[B13, A13 / FRC_TCON_Vx1_0 -, +] [D14, C14 / FRC_TCON_Vx1_0 -, +]
[D15, C15 / FRC_TCON_Vx1_2 -, +] [B15, A15 / FRC_TCON_Vx1_3 -, +]
[B16, A16 / FRC_TCON_Vx1_4 -, +] [D17, C17 / FRC_TCON_Vx1_5 -, +]
[D18, C18 / FRC_TCON_Vx1_6 -, +] [B18, A18 / FRC_TCON_Vx1_7 -, +]
[B19, A19 / FRC_TCON_Vx1_8 -, +] [D20, C20 / FRC_TCON_Vx1_9 -, +]
[D21, C21 / FRC_TCON_Vx1_10 -, +] [B21, A21 / FRC_TCON_Vx1_11 -, +]
[B22, A22 / FRC_TCON_Vx1_12 -, +] [D23, C23 / FRC_TCON_Vx1_13 -, +]
[D24, C24 / FRC_TCON_Vx1_14 -, +] [B24, A24 / FRC_TCON_Vx1_15 -, +]
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