Sharp LC-90LE657U, Service Manual

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LC-90LE657U
6 – 2
3. New method
LED flashing timing chart at the time of an error
1) Inverter/Lamp failure details (Flashes slowly once and flashes fast) Note
2) Power failure details (Flashes slowly twice and flashes fast) Note
Error type Center icon LED operation
Pins are monitor microcomputer pins unless other-
wise specified.
Lamp failure
Flashes fast once H: On
L: Off
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.
Error type Center icon LED operation
Pins are monitor microcomputer pins unless other-
wise specified.
PS_ON
AC_DET failure
Flashes fast once H: On
L: Off
AC_DET failure (L).
SM_POW
Main 13V failure
Flashes fast twice H: On
L: Off
DET_13V failure (L). Main 13V is not applied.
D_POW
Digital 3.3V failure
Flashes fast 3 times H: On
L: Off
DET_D3V3 failure (L). Digital 3.3V is not applied.
PANEL_POW
Panel 12V failure
Flashes fast 5 times H: On
L: Off
DET_PNL12V failure (L). Panel power is not applied.
100ms 400ms 1.6sec