Sharp LB-1085 (serv.man2) Service Manual / Parts Guide ▷ View online
LB-1085
ADJUSTMENT
5 – 23
6) Check to confirm that the contents set in 1) to 5) are proper.
Caution: Check to confirm that the content of [MONITOR EEP READ/WRITE] is set to [READ] and that the value of
[MONITOR EEP ADR] is set to [0xA]. If the content of [MONITOR EEP READ/WRITE] is set to [WRITE], the
time is changed. In addition, if the content of [MONITOR EEP ADR] is wrong, the system will fall into an
time is changed. In addition, if the content of [MONITOR EEP ADR] is wrong, the system will fall into an
abnormality and it may be permanently damaged.
7) If the items are correct, press [ENTER] button.
8) Put down the content of [MONITOR EEP DATA].
*
Corresponds to the value of [A] of the procedure 1) of the above [10-3. SETTING OF THE BACKLIGHT USAGE
ACCUMULATED TIME].
ACCUMULATED TIME].
9) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
10) Use VOL (+/-) key to set the content of [MONITOR EEP READ/WRITE] to [READ].
11) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP ADR].
12) Use VOL (+/-) key to set the content of [MONITOR EEP ADR] to [0xB].
13) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
14) Check to confirm that the contents set in 6) to 13) are proper.
Caution: Check to confirm that the content of [MONITOR EEP READ/WRITE] is set to [READ] and that the value of
[MONITOR EEP ADR] is set to [0xB]. If the content of [MONITOR EEP READ/WRITE] is set to [WRITE], the
time is changed. In addition, if the content of [MONITOR EEP ADR] is wrong, the system will fall into an
abnormality and it may be permanently damaged.
abnormality and it may be permanently damaged.
15) If the items are correct, press [ENTER] button.
16) Put down the content of [MONITOR EEP DATA].
*
Corresponds to the value of [B] of the procedure 1) of the above [10-3. SETTING OF THE BACKLIGHT USAGE
ACCUMULATED TIME].
17) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
18) Use VOL (+/-) key to set the content of [MONITOR EEP READ/WRITE] to [READ].
19) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP ADR].
20) Use VOL (+/-) key to set the content of [MONITOR EEP ADR] to [0xC].
21) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
22) Check to confirm that the contents set in 17) to 21) are proper.
Caution: Check to confirm that the content of [MONITOR EEP READ/WRITE] is set to [READ] and that the value of
[MONITOR EEP ADR] is set to [0xC]. If the content of [MONITOR EEP READ/WRITE] is set to [WRITE], the
time is changed. In addition, if the content of [MONITOR EEP ADR] is wrong, the system will fall into an
abnormality and it may be permanently damaged.
abnormality and it may be permanently damaged.
23) If the items are correct, press [ENTER] button.
24) Put down the content of [MONITOR EEP DATA].
*
Corresponds to the value of [C] of the procedure (1) of the above [10-3. SETTING OF THE BACKLIGHT USAGE
ACCUMULATED TIME].
25) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
26) Use VOL (+/-) key to set the content of [MONITOR EEP READ/WRITE] to [READ].
27) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP ADR].
28) Use VOL (+/-) key to set the content of [MONITOR EEP ADR] to [0xD].
29) Use SELECT (
/
) key of the machine to shift the cursor to [MONITOR EEP READ/WRITE].
30) Check to confirm that the contents set in 25) to 29) are proper.
Caution: Check to confirm that the content of [MONITOR EEP READ/WRITE] is set to [READ] and that the value of
[MONITOR EEP ADR] is set to [0xD]. If the content of [MONITOR EEP READ/WRITE] is set to [WRITE], the
time is changed. In addition, if the content of [MONITOR EEP ADR] is wrong, the system will fall into an
abnormality and it may be permanently damaged.
31) If the items are correct, press [ENTER] button.
32) Put down the content of [MONITOR EEP DATA].
*
Corresponds to the value of [D] of the procedure (1) of the above [10-3. SETTING OF THE BACKLIGHT USAGE
ACCUMULATED TIME].
LB-1085
LED FLASHING TIMING CHART
6 – 1
CHAPTER 6. LED FLASHING TIMING CHART
1. POWER LED (LARGE CLASSIFICATION)
Error type
Power green LED operation (1 cycle)
Remarks
(The pin is the monitor microprocessor
(IC2002) pin.)
Lamp failure
Flashes once: Fast
Flashes once: Fast
ERR_PNL(43pin): L error. Settled with match-
ing 10 times continuously in the interval of
500msec. (Detected only when the backlight is
lighting.)
Note that the machine does not boot with 5
times in the accumulated total except for the
monitor process. (At the first time, only the
inverter reset is made and error OFF is not
made.)
ing 10 times continuously in the interval of
500msec. (Detected only when the backlight is
lighting.)
Note that the machine does not boot with 5
times in the accumulated total except for the
monitor process. (At the first time, only the
inverter reset is made and error OFF is not
made.)
[Clear method of accumulated number of times]
Set "LAMP ERROR" (page 1 of process A) to 0.
While pressing [CH_DOWN]+[VOL_UP] on the
main unit, turn ON AC_ON for 3 minutes contin-
uously.
Set "LAMP ERROR" (page 1 of process A) to 0.
While pressing [CH_DOWN]+[VOL_UP] on the
main unit, turn ON AC_ON for 3 minutes contin-
uously.
Power failure
Flashes twice
Flashes twice
Refer to “2. Power failure details”.
Communication failure
with main CPU
with main CPU
Flashes 3 times
Refer to “3. Communication failure details”.
Communication line failure or main CPU com-
munication failure.
munication failure.
→
Check debug statements for the main CPU.
Communication line with main CPU:
TxD (pin 28), RxD (pin 29)
TxD (pin 28), RxD (pin 29)
Vsync Failure
Flashes 4 times
VSYNC (pin 52) failure (Fixed to L or H).
The video process IC operation error.
Detected during operation (interruption).
Detected during operation (interruption).
Monitor temperature failure
Flashes 5 times
Flashes 5 times
When the temperature in the panel section is
kept at 60°C or more for 15sec or more, CAU-
TION (by OSD "TEMPERATURE" (ref flashing
characters) on the right under side of the
screen).
Error standby when the temperature is kept at
60°C or more for 25sec or more.
kept at 60°C or more for 15sec or more, CAU-
TION (by OSD "TEMPERATURE" (ref flashing
characters) on the right under side of the
screen).
Error standby when the temperature is kept at
60°C or more for 25sec or more.
[Avoidance method]
Decrease the MONITOR MAX TEMP value
(temperature protect threshold value) on page
28 of the process A.
(temperature protect threshold value) on page
28 of the process A.
Program area data crash
Flashes 8 times
Flashes 8 times
Flash ROM data error in the microprocessor
[Recovering method]
Write the microprocessor software.
Write the microprocessor software.
250ms
1sec
[Time that chart indicates]
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
LB-1085
LED FLASHING TIMING CHART
6 – 2
2. POWER FAILURE DETAILS (POWER LED FLASHES TWICE AND OPC LED FLASHES)
3. COMMUNICATION FAILURE DETAILS
(POWER LED FLASHES 3 TIMES AND OPC LED FLASHES)
Error type
Power green LED operation (1 cycle)
Remarks
(Pins are microprocessor pins
unless otherwise specified.)
DET_10V failure
Flashes once
D ET_ 1 0V ( pi n 57 ) . U R 1 0V or A9 V i s n o t
applied.
applied.
If error is detected during operation, error
standby is activated by polling.
standby is activated by polling.
DET_D3V3 failure
Flashes twice
Flashes twice
DET_D3V3 (pin 59) failure (L). D3.3V is not
applied.
If error is detected during operation, error
standby is activated by polling.
applied.
If error is detected during operation, error
standby is activated by polling.
DET_6V failure
Flashes 3 times
DET_6V (pin 56) failure (L). D5V or A5V is not
applied.
applied.
If error is detected during operation, error
standby is activated by polling.
standby is activated by polling.
PNL_12V failure
Flashes 5 times
DET_PNL_12V (pin 58) failure (L). Panel power
is not applied.
is not applied.
If error is detected during operation, error
standby is activated by polling.
standby is activated by polling.
Digital error
3.3V error
3.3V error
Flashing 6 times
SRESET (33pin) error (L). The digital 3.3V is
not rising. The reset line is pulled to L.
Detection when booting and operating. (Inter-
ruption).
not rising. The reset line is pulled to L.
Detection when booting and operating. (Inter-
ruption).
Main failure
Flashes 7 times
Main microprocessor detection error. (FAN
error, 1bit AMP error, etc.)
error, 1bit AMP error, etc.)
T h e d e t a i l s a r e d i s p l a y e d i n “ E R R O R
STANDBY CAUSE” on page 1 of process A for
the main microprocessor.
STANDBY CAUSE” on page 1 of process A for
the main microprocessor.
TCON ROM failure
Flashes 8 times
LCD control ROM failure
Notifies from the main CPU by communication
Error type
Power green LED operation (1 cycle)
Remarks
(Basically, log analysis of the debug print sen-
tence and communication log analysis by the
bus monitor.)
Initial communication
reception failure
reception failure
Flashes once
Initial communication from the main CPU is not
received. (After canceling the reset, request for
the monitor model No. is not received.)
received. (After canceling the reset, request for
the monitor model No. is not received.)
Communication line failure or main CPU start-
up failure.
up failure.
Time-out setting reception failure
Start-up confirmation
reception failure
Start-up confirmation
reception failure
Flashes twice
Time out setting from the main CPU
The change in the boot mode is not received.
(The boot communication up to the time out
setting and the change in the boot mode is not
received yet.)
The change in the boot mode is not received.
(The boot communication up to the time out
setting and the change in the boot mode is not
received yet.)
Regular communication failure
Flashes 3 times
Regular communication that is performed at 1
second intervals in the normal operation is
interrupted.
second intervals in the normal operation is
interrupted.
Main CPU operation failure or monitor micro-
processor’s reception failure.
processor’s reception failure.
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
LB-1085
TROUBLESHOOTING
7 – 1
CHAPTER 7. TROUBLESHOOTING
1 POWER LED FLASHING
*
The following chart is power green LED operation (1 cycle)
1
Power LED flashing timing table
2
Power abnormality
3
Lamp abnormality
4
The power is not supplied
5
The display is not shown / Display abnormality
6
The remote controller does not work
7
No sound / Reproduced sound abnormality
Lamp error
Lamp abnormality. If it occurs 5 times, the unit
cannot be turned ON. To boot forcibly, while
pressing [CH_Down] + [VOL_UP], turn AC_ON.
Refer to "3 Lamp abnormality."
cannot be turned ON. To boot forcibly, while
pressing [CH_Down] + [VOL_UP], turn AC_ON.
Refer to "3 Lamp abnormality."
Flashing Once
H:On
L: Off
Power error
Flashing twice
Between main CPU's
Communication error
Communication error
Flashing 3 times
Vsync
Flashing 4 times
Monitor temperature
error
error
Flashing 5 times
H:On
L: Off
H:On
L: Off
H:On
L: Off
H:On
L: Off
Power abnormality. Check the flashing pattern
of the OPC LED.
Refer to "2 Power abnormality."
of the OPC LED.
Refer to "2 Power abnormality."
Communication abnormality. Check the flashing
pattern of the OPC LED. Log analysis of the
debug print sentence, log analysis by the bus
monitor. Replace the main PWB.
pattern of the OPC LED. Log analysis of the
debug print sentence, log analysis by the bus
monitor. Replace the main PWB.
Panel temperature abnormality. Since the panel
temperature exceeds 60˚C, remove the factor
which causes the temperature rise.
temperature exceeds 60˚C, remove the factor
which causes the temperature rise.
VSYNC abnormality detection. Video process
IC operation abnormality.
Replace the main PWB.
IC operation abnormality.
Replace the main PWB.
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