LB-1085 (serv.man2). Parts Manual - Sharp Monitor Parts Guide (repair manual). Page 46

LB-1085

LED FLASHING TIMING CHART

6 – 1

Error type

Power green LED operation (1 cycle)

Remarks

(The pin is the monitor microprocessor 

(IC2002) pin.)

Lamp failure
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.)

[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.

Power failure
Flashes twice

Refer to “2. Power failure details”.

Communication failure 
with main CPU

Flashes 3 times

Refer to “3. Communication failure details”.

Communication line failure or main CPU com-
munication failure.

→

 Check debug statements for the main CPU.

Communication line with main CPU:
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).

Monitor temperature failure
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.

[Avoidance method]

Decrease the MONITOR MAX TEMP value
(temperature protect threshold value) on page
28 of the process A.

Program area data crash
Flashes 8 times

Flash ROM data error in the microprocessor

[Recovering method]
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