Sharp LC40E67U - LC - 40" LCD TV, Service Manual

Page: 62 / 112

LC-40E67U/LC-40E77U
6 – 15
1) Power LED (Large classification)
LED flashing timing chart for error notification.
Unused
Error type Power green LED operation (1 cycle) Pins are monitor microprocessor (IC2002) pins.
Lamp error
Flashes once: Fast H: On
L: Off
Judged by the ERR_PNL port. Confirmed after 10 consecutive
detections at 500 ms intervals (detected only when the backlight is
on).
[Released]
•
Set “LAMP ERROR” of the adjustment process to 0.
• Execute AC_ON with [CH_DOWN] and [VOL_UP] on the unit
down.
• Continuous illumination for 3 minutes.
NOTE: After five detection counts, the lamp cannot be activated
except in the monitoring process. (For the first time, only
the inverter is reset, and error OFF is not activated.)
Power error
Flashes twice H: On
L: Off
Refer to “Power error details”.
Detection is performed at 16 ms intervals, and each terminal for
monitoring the power is polled. If the error logic is detected twice
in a row, error is confirmed so as to shift to the error standby.
Communication error
with the main CPU
Flashes 3 times H: On
L: Off
Judged by the communication line error or main CPU communica-
tion error.
Refer to “Communication error details”.
Communication line with the main CPU: TxD, RxD
Check debug statements for the main CPU.
Vsync error
Flashes 4 times H: On
L: Off
VSYNC error (L or H fixed).
Image processing IC operation error
Monitor temperature
error
Flashes 5 times H: On
L: Off
Judged by monitoring temperature with the temperature sensor.
When the panel temperature is 60
°
C or more for 15 seconds or
more in a row, caution is displayed. If the panel temperature is
60
°
C or more for 25 seconds or more in a row, error standby is
activated.
[Released]
Reduce the value of MONITOR MAX TEMP of OTHERS (temper-
ature protection threshold).
Program area data
destruction
Flashes 8 times H: On
L: Off
Flash ROM data error in the microprocessor.
[Released]
Write the microprocessor software.
250ms 1sec