Sharp LC-40LE820E, Service Manual

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LC-40/46/52LE820E (1st Edition)
7 – 15
LED flashing timing chart at the time of the error
1) Low-speed blinking
2) Lamp failure details (Low-speed blinking: Flashes once + High-speed blinking)
3) Power failure details (Low-speed blinking: Flashes twice + High-speed blinking)
Error type Expression of Central Icon LED Note: Pins are monitor microprocessor pins (IC2002).
Lamp failure
low-speed blinking
Flashes once H: ON
L: OFF
Refer to “Lamp failure details”.
LOW/High blinking by pressing the [MENU] key on the remote
control.
Power failure
low-speed blinking
Flashes twice H: ON
L: OFF
Refer to “Power failure details”.
LOW/High blinking by pressing the [MENU] key on the remote
control.
Communication
failure with main CPU
low-speed blinking
Flashes 3 times H: ON
L: OFF
Refer to “Communication failure details”.
LOW/High blinking by pressing the [MENU] key on the remote
control.
Communication line failure or main CPU communication failure.
Others
low-speed blinking
Flashes 4 times H: ON
L: OFF
Refer to “Other failure details”.
LOW/High blinking by pressing the [MENU] key on the remote
control.
Error type Expression of Central Icon LED Note: Pins are monitor microprocessor pins unless otherwise
specified (IC2002).
Lamp failure
Flashes once
(High speed)
H: ON
L: OFF
ERR_PNL (40pin): Abnormal H.
Confirmed after 8 consecutive detections at 64ms intervals
(detected only when the backlight is on).
NOTE: After 5 detection counts, the lamp cannot be activated
except in the monitoring process.
To confirm the problem, “Lamp Error detection off-mode”
is prepared.
This mode compulsorily starts the set disregarding the
count.
Please refer to [ADJUSTMENT PROCEDURE - 7. Lamp
Error detection]
Error type Expression of Central Icon LED Note: Pins are monitor microprocessor pins unless otherwise
specified (IC2002).
PS_ON
AC_DET failure
Flashes once
(High speed) H: ON
L: OFF
AC_DET (72pin: Abnormal (L).
If error is detected during start-up or operation, the power is turned
on again by interrupt handling (instantaneous blackout process-
ing).
SM_POW
Main 13V failure
Flashes twice
(High speed) H: ON
L: OFF
DET_13V (38pin): Abnormal (L). Main 13V is not applied.
If error is detected during start-up or operation, the power is turned
on again by polling.
D_POW
Digital 3.3V failure
Flashes 3 times
(High speed) H: ON
L: OFF
DET_D3V3 (36pin): abnormal (L). Digital 3.3V is not applied.
If error is detected during start-up or operation, the power is turned
on again by polling.
PANEL_POW
Panel 12V failure
Flashes 5 times
(High speed) H: ON
L: OFF
DET_PNL12V (35pin): abnormal (L).
DET_PNL12V is not applied.
Detection starts after receiving command from Panel Power ON.
The power is turned off by polling.
100ms 400ms 1.6sec