Sharp 60LE920UN, 52LE920UN service manual Inverter/Lamp failure details Flashes slowly once

LC-52LE920UN/LC-60LE920UN

LED flashing timing chart at the time of an error

100ms		400ms		1.6sec
1) Inverter/Lamp failure details (Flashes slowly once				and flashes fast)
Error	type	Center	icon	LED operation
Lamp failure		H: On
Flashes fast	once

L:Off

2)Power failure details Flashes slowly twice and flashes fast)

	Error type			Center	icon	LED operation
SM	POW			H: On
Main	13V failure
Flashes		fast	twice		rq_q		I
				L: Off
D POW				H: On
Digital 3.3V			failure
Flashes		fast 3 times			R	FLY[
				L: Off
PANEL		POW		H: On
Panel 12V failure
Flashes		fast 5 times		_	R_	RTL	F1

L:Off

3)Communication failure details (Flashes slowly 3 times and flashes fast)

Error type		Center icon LED operation
Initial communica-		H: On
tion reception	failure
Flashes fast once
		L: Off
Start-up confirma-		H: On
tion reception	failure	FLR
Flashes fast	twice

L: Off

Note

Pins are monitor microcomputer pins unless other- wise specified.

ERR_PNL(40pin): Hi failure. Confirmed after 8 consecu- tive detections at 64msec intervals (detected only when the backlight is on).

Note that after five detection counts, the lamp cannot be activated except in the monitor process.

Accumulated counts are cleared to 0 by the setting in the process A.

Note

Pins are monitor microcomputer pins unless other- wise specified.

DET_13V(38pin) failure (L). Main 13V is not applied.

If error is detected during start-up or operation, the power is turned on again by polling.

DET_D3V3(36pin) failure (L). Digital 3.3V is not applied.

If error is detected during start-up or operation, the power is turned on again by polling.

DET_PNL12V(35pin) failure (L). Panel power is not applied.

Detection is started after turning on the panel power and receiving command; the power is turned off by polling.

Note

Basically, debug print logs are analyzed or commu- nication logs are analyzed by a bus monitor.

Initial communication from the main CPU is not received. (Request for the monitor model No. is not received.)

--> Communication line failure or main CPU start-up fail- ure

Start-up reason confirmation from the main CPU cannot be received. (Start-up communication until start-up rea- son notification command is not received.)

--> Main CPU start-up failure or monitor microcomputer reception failure

Regular communica- tion failure

Flashes fast 3 times

Other communica- tion failure Flashes fast 5 times

H: On

F1 RTI

L:Off

H:On

_ H Iq RZI

L: Off

Regular communication that is performed at 1 second intervals in the normal operation is interrupted.

--> Main CPU operation failure or monitor microcom- puter reception failure

When a request (PM_REQ=H) is sent from the main microcomputer, the request command is not output from the main CPU, etc.

--> Main CPU operation failure or monitor microcom- puter reception failure

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