Sharp LC32SB27U - LC - 32" LCD TV Service Manual page 63

LED flashing timing chart for error notification.
1) Power red LED (Large classification)
Error type
Lamp error H: On
Flashes once: Fast
L: Off
Power error H: On
Flashes twice
L: Off
Communication error H: On
with the main CPU
Flashes 3 times
L: Off
Vsync error H: On
Flashes 4 times
L: Off
Monitor temperature H: On
error
Flashes 5 times
L: Off
Program area data H: On
destruction
Flashes 8 times
L: Off
250ms
Power green LED operation (1 cycle)
LC-32D47U/LC-32SB27U/LC-C3237U
1sec
Pins are monitor microprocessor (IC2002) pins.
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.)
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.
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 (L or H fixed).
Image processing IC operation error
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).
Flash ROM data error in the microprocessor.
[Released]
Write the microprocessor software.
6 – 13
Unused