Sharp LC-80LE646E (serv.man7) Service Manual ▷ View online
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 57
<During external connection> No picture on the monitor
No picture appears on EXT1 connected monitor during the ATV reception.
Does CVBS signal output from pin [19] of EXT1 (SC505)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
NO
Does CVBS signal output from pin [5] of IC510?
(CAPLESS VIDEO AMP with LPF)
(CAPLESS VIDEO AMP with LPF)
YES
Check the line between SC505 and IC510.
NO
Does CVBS signal input to pin [3] of IC510?
YES
Check the peripheral circuits of IC510.
NO
Does CVBS signal output from pin [2] of IC507?
YES
Check the line between IC507 and IC510.
NO
Is CVBS_OUT_MUTE [pin (1)] of IC507 at “L”?
YES
Check the line between IC3303 and IC507.
Check the peripheral circuits of IC3303.
Check the peripheral circuits of IC3303.
NO
Does CVBS signal input to pin [6] of IC507?
YES
Check the peripheral circuits of IC507.
NO
In the case of LE645, LE648 series, refer to (A)?
In the case of LE646 series, refer to (B)?
In the case of LE646 series, refer to (B)?
(A)
(B)
Check the line between IC507 and TUNER (TU1102).
(Q1106 etc...)
(Q1106 etc...)
Check the line between IC507 and TUNER (TU1104).
(Q1106 etc...)
(Q1106 etc...)
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
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<During external connection> No picture on the monitor
No picture appears on EXT1 connected monitor during the DTV reception.
Does CVBS signal output from pin [19] of EXT1 (SC505)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
NO
Does CVBS signal output from pin [5] of IC510 (CAPLESS
VIDEO AMP with LPF)?
VIDEO AMP with LPF)?
YES
Check the line between SC505 and IC510.
NO
Does CVBS signal input to pin [3] of IC510?
YES
Check the peripheral circuits of IC510.
NO
Does CVBS signal output from pin [2] of IC507?
YES
Check the line between IC507 and IC510.
NO
Is CVBS_OUT_MUTE [pin (1)] of IC507 at “H”?
YES
Check the line between IC3303 and IC507.
Check the peripheral circuits of IC3303.
Check the peripheral circuits of IC3303.
NO
Does CVBS signal input to pin [4] of IC507?
YES
Check the peripheral circuits of IC507.
NO
Does CVBS signal output from pin (AJ20/CPU_VDAC1_OUT) of
IC3303 (Digital AV decode & Main CPU)?
IC3303 (Digital AV decode & Main CPU)?
YES
Check the line between IC3303 and IC507.
Check the peripheral circuits of IC3303.
Check the peripheral circuits of IC3303.
NO
Refer to “No picture on the display (3) (4)”.
[External input Network] No picture on the display
Does not the signal input to Network go out?
Does the signal in/output to pins (1), (2), (3), (6) of LAN-jack
(J9501)?
NO
Check the interface device and peripheral circuits.
(power-LED of hub, LINK-LED of hub)
(power-LED of hub, LINK-LED of hub)
YES
Do signals in/output to pins of IC3303 (Digital AV decode & Main
CPU)?
Pins [AD32&AD31/CPU_DATMDI_RJ45_TPN, AE32&AE31/
CPU_DATMDI_RJ45_RPN]
CPU)?
Pins [AD32&AD31/CPU_DATMDI_RJ45_TPN, AE32&AE31/
CPU_DATMDI_RJ45_RPN]
NO
Check the line between IC3303 and J9501.
(T9501 etc...)
(T9501 etc...)
YES
Check IC3303 and its peripheral circuits.
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 59
No light (Back Light doesn't light)
Is the AC cord connector tightly connected to the set?
NO
Reconnect the AC cord tightly and turn on the power again.
YES
Are the wire harnesses and other cables properly connected in
the set?
the set?
NO
Reconnect the wire harnesses and other cables properly in the
set.
set.
YES
Does Power starts up (central Icon LED lights up)?
NO
Refer to “No power (central Icon LED failure to light up) or no
startup (central Icon LED failure is flashing)”.
startup (central Icon LED failure is flashing)”.
YES
Is there the pins [10/PNL_POW] of [PD] P9602 at “H”?
NO
Check the power unit, and the signal line between PNL_POW
and IC3303 (Digital AV decode & Main CPU).
and IC3303 (Digital AV decode & Main CPU).
YES
Is there the pins [2/STB] of [PD] P9602 at “H”?
NO
Check the power unit, and the signal line between STB and
IC2001 (UCOM)/IC3303.
IC2001 (UCOM)/IC3303.
YES
Replace the power unit.
LCD Panel failure (1)
Does a single or
several vertical
stripes appear on
the LCD screen?
several vertical
stripes appear on
the LCD screen?
Does a single or sev-
eral horizontal stripes
appear on the LCD
screen?
eral horizontal stripes
appear on the LCD
screen?
Do luminescent or
black dots appear
on the screen?
black dots appear
on the screen?
Is the on-screen
image rippling or
distorted?
image rippling or
distorted?
Is there any portion
which some
screens were dark-
ish or became
whitish?
which some
screens were dark-
ish or became
whitish?
Does all LED of
one line are not
lighting?
one line are not
lighting?
Replace the LCD panel or the power unit.
LCD Panel failure (2)
The backlight func-
tions. Does not the
image come out in the
LCD screen (screen
black)?
tions. Does not the
image come out in the
LCD screen (screen
black)?
Does the entire LCD
screen look whitish all
over?
screen look whitish all
over?
Does the QS drive func-
tion?
tion?
Are the data bit drop-
out? (No solution even
when turning on and off
the QS drive)
out? (No solution even
when turning on and off
the QS drive)
Is the gamma correc-
tion as specified?
tion as specified?
Check the LCD_CONT_UNIT.
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 60
[6] LED flashing specification at the time of the error (LC-80LE645E/RU,646E/S,648E)
Display method
• Refer to Table 1.
• LED that can be used are only one of the central icon (Emblem Unit).
This expresses the error situation by combining blinking at low speed and blinking at high speed.
• For this model, the blinking pattern displayed first is only a low-speed blinking.
This expresses a rough content of the error.
• For this model, details are displayed by a high-speed blinking by pushing remote control MENU key.
This expresses details of the error.
Details are distinguished by the blinking frequency.
• It doesn’t return to the outline display again (blink at low speed) by pushing the MENU key (The toggle is not done).
Please confirm “MONITOR ERR CAUSE” of the adjustment Process mode (1/20 page), when the error doesn't reproduce by having returned from
the error.
the error.
• The process of the upgrade is expressed by the brightness of point LED that smoothness changes.
• The upgrade completion is expressed by the LED brightness that changes in a staircase pattern.
LED flashing method
<Examination for a rough content of the error>
<Examination for details of the error>
<Upgrade executing>
<Upgrade completion>
Central icons
By pushing remote control MENU key.
400ms
400ms
1600ms
OFF
ON
Central icons
1600ms
300ms
100ms
400ms
400ms
1600ms
OFF
ON
Central icons
500ms
500ms
OFF
ON
Central icons
1000ms
1000ms
1000ms
1000ms
OFF
ON
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