Sharp LC-90LE657U Service Manual page 44

LC-90LE657U
3. New method
LED flashing timing chart at the time of an error
100ms 400ms
1) Inverter/Lamp failure details (Flashes slowly once and flashes fast)
Error type
Lamp failure H: On
Flashes fast once
L: Off
2) Power failure details (Flashes slowly twice and flashes fast)
Error type
PS_ON H: On
AC_DET failure
Flashes fast once
L: Off
SM_POW H: On
Main 13V failure
Flashes fast twice
L: Off
D_POW H: On
Digital 3.3V failure
Flashes fast 3 times
L: Off
PANEL_POW H: On
Panel 12V failure
Flashes fast 5 times
L: Off
1.6sec
Center icon LED operation
Center icon LED operation
6 – 2
Note
Pins are monitor microcomputer pins unless other-
wise specified.
ERR_PNL: failure(H). Inverter/Lamp error is detected.
Note that after five detection counts, the lamp cannot be
activated except in the adjustment process mode.
Accumulated counts are cleared to 0 by the setting in the
LAMP ERROR RESET on the adjustment process mode.
Note
Pins are monitor microcomputer pins unless other-
wise specified.
AC_DET failure (L).
DET_13V failure (L). Main 13V is not applied.
DET_D3V3 failure (L). Digital 3.3V is not applied.
DET_PNL12V failure (L). Panel power is not applied.