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 – 21
4) Communication failure details (Low-speed blinking: Flashes 3 times + High-speed blinking)
5) Other failure details (Low-speed blinking: Flashes 4 times + High-speed blinking)
Error type
Expression of Central Icon LED
Note: Basically, debug print logs are analyzed or
communication logs are analyzed by a bus monitor.
communication logs are analyzed by a bus monitor.
Initial communication
reception failure
Flashes once
(High speed)
reception failure
Flashes once
(High speed)
H: ON
L: OFF
Initial communication from the main CPU is not received.
(Request for the monitor model No. is not received.)
→ Communication line failure or main CPU start-up failure.
(Request for the monitor model No. is not received.)
→ Communication line failure or main CPU start-up failure.
Start-up confirmation
reception failure
Flashes twice
(High speed)
reception failure
Flashes twice
(High speed)
H: ON
L: OFF
Start-up reason confirmation from the main CPU cannot be
received.
(Startup communication until start-up reason notification command
is not received.)
→ Main CPU start-up failure or monitor microprocessor reception
failure.
received.
(Startup communication until start-up reason notification command
is not received.)
→ Main CPU start-up failure or monitor microprocessor reception
failure.
Regular communica-
tion failure
tion failure
Flashes 3 times
(High speed)
(High speed)
H: ON
L: OFF
Regular communication that is performed at 1 second intervals in
the normal operation is interrupted.
→ Main CPU operation failure or monitor microprocessor
reception failure.
the normal operation is interrupted.
→ Main CPU operation failure or monitor microprocessor
reception failure.
Other communica-
tion failure
tion failure
Flashes 5 times
(High speed)
(High speed)
H: ON
L: OFF
When a request (PM_REQ=H) is sent from the main microproces-
sor, the request command is not output from the main CPU, etc.
→ Main CPU operation failure or monitor microprocessor
reception failure.
sor, the request command is not output from the main CPU, etc.
→ Main CPU operation failure or monitor microprocessor
reception failure.
Error type
Expression of Central Icon LED
Note: Pins are monitor microprocessor pins unless otherwise
specified (IC2001).
specified (IC2001).
Monitor temperature
failure
failure
Flashes once
(High speed)
(High speed)
H: ON
L: OFF
If the panel temperature is 60
°C or more for 15s or more in a row,
CAUTION appears on the OSD (flashes in red in the lower right
screen).
If the panel temperature is 60
screen).
If the panel temperature is 60
°C or more for 25s or more in a row,
error standby is activated.
(MONITOR MAX TEMP on page (12/21) of the adjustment pro-
cess: Change AD value for temperature failure): Thermistor
(MONITOR MAX TEMP on page (12/21) of the adjustment pro-
cess: Change AD value for temperature failure): Thermistor
Main failure
Flashes 3 times
(High speed)
(High speed)
H: ON
L: OFF
Main microprocessor detection error (CPU temperature error, etc.)
Details are displayed on page (1/21) of the adjustment process for
the main microprocessor.
Details are displayed on page (1/21) of the adjustment process for
the main microprocessor.
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
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[3] TROUBLESHOOTING TABLE (LC-60LE840E/RU,841E/S,843E)
No power (Central Icon LED failure to light up) or No startup (Central Icon LED is flashing)
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 to
the set?
the set?
NO
Reconnect the wire harnesses and other cables properly to the
set.
set.
YES
Is power supplied from pins [9/BU+5V] of [PD] P9602?
NO
Replace the power unit.
YES
Is there the pins [12/PS_ON] of [PD] P9602 at “H”?
NO
Check the signal line between PS_ON and IC2001 (UCOM)/
IC3303 (Digital AV decode & Main CPU).
IC3303 (Digital AV decode & Main CPU).
YES
Is there the pins [11/AC_DET] of [PD] P9602 at “H”?
NO
Check the power unit, and the signal line between AC_DET and
IC2001/IC3303.
IC2001/IC3303.
YES
Is power supplied from pins [17~20/UR+13V] of [PD] P9602 as
specified?
specified?
NO
Check the line between PS_ON and IC2001/IC3303.
YES
Are the DC/DC converter outputs and the output voltages along
the control lines as specified?
the control lines as specified?
NO
Check the DC/DC converters and the control lines.
Replace defective parts as required.
Replace defective parts as required.
1) BU3.3V (IC9609 etc.)
2) D5.6V (IC9608 etc.)
3) D5V (IC9603 etc.)
4) U5V (IC9602 etc.)
5) D3.3V (IC9605 etc.)
6) M1.8V (IC9607 etc.)
7) D1.5V (IC9604 etc.)
8) D1.2V (IC1509 etc.)
9) D1.1V (IC9606 etc.)
10)AT5V (IC1104 etc.)
11)IF1.8V (IC1109 etc.)
12)SAT+1.2V (IC1102 etc.)
13)STB+3.3V (Q9607 etc.)
14)SD3.3V (IC8456 etc.)
15)CPU_A+1.2V (IC3301 etc.)
16)CIIN+5V (IC4403 etc.)
17)MT5135+1.1V (IC4401 etc.)
2) D5.6V (IC9608 etc.)
3) D5V (IC9603 etc.)
4) U5V (IC9602 etc.)
5) D3.3V (IC9605 etc.)
6) M1.8V (IC9607 etc.)
7) D1.5V (IC9604 etc.)
8) D1.2V (IC1509 etc.)
9) D1.1V (IC9606 etc.)
10)AT5V (IC1104 etc.)
11)IF1.8V (IC1109 etc.)
12)SAT+1.2V (IC1102 etc.)
13)STB+3.3V (Q9607 etc.)
14)SD3.3V (IC8456 etc.)
15)CPU_A+1.2V (IC3301 etc.)
16)CIIN+5V (IC4403 etc.)
17)MT5135+1.1V (IC4401 etc.)
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 23
The sound is not emitted from the Speaker & Woofer though the picture has come out.
No sound output in all modes?
YES
Do audio signals output from pins [Y30/CPU_AOLRCK, Y31/
CPU_AOBCK, V27/CPU_AOSDATA0] of IC3303 (Digital AV
decode & Main CPU)?
CPU_AOBCK, V27/CPU_AOSDATA0] of IC3303 (Digital AV
decode & Main CPU)?
NO
Check IC3303 and its peripheral circuits.
YES
Do audio signals input to pins [7, 8, 9] of IC2701 (DSP)?
NO
Check the line between IC3303 and IC2701.
YES
Do audio signals output from pins [43/AMP_BCLK, 44/
AMP_LRCLK, 45/AMP_DATA_LR, 46/AMP_DATA_SW, 47/
AMP_MCLK] of IC2701?
AMP_LRCLK, 45/AMP_DATA_LR, 46/AMP_DATA_SW, 47/
AMP_MCLK] of IC2701?
NO
Check IC2701 and its peripheral circuits.
YES
In the case that the sound is not emitted from the Speaker, refer
to (A).
In the case that the sound is not emitted from the Woofer, refer to
(B).
to (A).
In the case that the sound is not emitted from the Woofer, refer to
(B).
(B)
(A)
Do audio signals input to pins [5, 6, 7, 8] of IC2703
(SP_AMP)?
(SP_AMP)?
NO
Check the line between IC2701 and IC2703.
YES
Do audio signals output from pins [28/OUTML, 30/
OUTPL, 12/OUTPR, 14/OUTMR] of IC2703?
OUTPL, 12/OUTPR, 14/OUTMR] of IC2703?
NO
Check IC2703 and its peripheral circuits.
YES
Is AMP_MUTE [pin (21)] of IC2703 at “H”?
NO
Check the line between IC2703 and IC3303 & IC2001 (UCOM).
(Q2701,D2701 etc...)
(Q2701,D2701 etc...)
YES
Do audio signals input to pins [1&2/L-ch, 3&4/R-ch] of
P2701?
P2701?
NO
P2701 terminal and the peripheral circuit (L/C filter) are checked.
YES
Check Speaker (right and left) and wire harness.
Do audio signals input to pins [5, 6, 7, 8] of IC2702
(Woofer_AMP)?
(Woofer_AMP)?
NO
Check the line between IC2701 and IC2702.
YES
Do audio signals output from pins [28/OUTML, 30/OUTPL, 12/
OUTPR, 14/OUTMR] of IC2702?
OUTPR, 14/OUTMR] of IC2702?
NO
Check IC2702 and its peripheral circuits.
YES
Is AMP_MUTE [pin (21)] of IC2702 at “H”?
NO
Check the line between IC2702 and IC3303 & IC2001.
(Q2701,D2701 etc...)
(Q2701,D2701 etc...)
YES
Do audio signals input to pins [1/SUB (+), 2/SUB (-)] of P2702?
NO
P2702 terminal and the peripheral circuit (L/C filter) are checked.
YES
Check Woofer and wire harness.
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
6 – 24
No sound (during the reception of TV (ANALOG) broadcasting)
Does not the sound go out though the picture has come out when UHF/VHF is received?
In the case of LE840,LE843 series, refer to (A).
In the case of LE841 series, refer to (B).
In the case of LE841 series, refer to (B).
(B)
(A)
Does SIF signal output from pin (8) of TUNER
(TU1102)?
(TU1102)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of
IC3303 (Digital AV decode & Main CPU)?
IC3303 (Digital AV decode & Main CPU)?
NO
Check the line between TU1102 and IC3303. (Q1102, etc.)
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
Does SIF signal output from pin (8) of TUNER (TU1104)?
NO
Check the tuner and its peripheral circuits.
Replace as required.
Replace as required.
YES
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of IC3303
(Digital AV decode & Main CPU)?
(Digital AV decode & Main CPU)?
NO
Check the line between TU1104 and IC3303. (Q1102, etc.)
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
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