DOWNLOAD Sharp LC-37XL8E (serv.man4) Service Manual ↓ Size: 1 MB | Pages: 23 in PDF or view online for FREE

LC-32XL8E/S/RU, LC-37XL8E/S/RU

4 – 21

SCART2:                             
No picture from EXT3 appears on EXT2- connected monitor.

TERMINAL UNIT:                 
Is CVBS signal input from pin (51) of IC506 to pin (19) of 
SCART2 (SC503)?

YES

Check the setting of an external input device that connects of 
SC503.

NO

Is CVBS signal input from pin (5) of the connector P501 to pin (3) 
of IC506 (VIDEO SELECTOR)?

YES

Check the IC506 and its peripheral circuits.

MINI AV UNIT:                      

NO

Is CVBS signal input from pin (6) of the input terminal J901 to pin 
(5) of the connector (P501)?

YES

Check the connector (P501/P901)

NO

Is V3_PLUG signal of the CVBS signal detection function from 
pin (7) of the input terminal J901 normal?

YES

Check the setting of an external input device that connects of 
J901.

NO

Check between V3_PLUG_LINE J901 and pin (2) of IC506 in the 
TERMINAL UNIT. (Connector P901/P501, etc.)

LED flashing atterns for error notification

1) Power LED

Error type

Power LED operation (1 cycle)

Description

Lamp failure

H: On

ERR_PNL(IC2002_43pin): Abnormal L. Confirmed after 5 consec-
utive detections at 1 second intervals.
  (Detected only when the backlight is light is on).

Flashes once: Fast

L: Off

Note that after five detection counts, the lamp cannot be activated 
except in the monitoring process.
  (For the first time doesn't make an error only by inverter reset 
OFF)
Accumulated counts are cleared to 0 when the corresponding set-
ting in the process adjustment(2/33) is made or when the power is 
turned on with [CH_DOWN] and [VOL_UP] on the unit down or 
after continuous illumination for 3 minutes.

Power failure

H: On

Refer to "Power failure details".

Flashes twice

L: Off

Communication fail-
ure with main CPU

H: On

Refer to "Communication failure details".
Communication line failure or main CPU(IC8101) communication 
failure. 

Flashes 3 times

L: Off

→Check main CPU (IC8101).

Monitor temp. failure H: On

If the panel temperature is 60

°C or more for 15 seconds or more in 

a row, CAUTION appears.
If the panel temperature is 60

°C or more for 15 seconds or more in 

a row, error standby is activated.

Flashes 5 times

L: Off

(MONITOR MAX TEMP of process adjustment(29/33): Change of 
temperature failure AD value): Thermistor

250ms

1sec

LC-32XL8E/S/RU, LC-37XL8E/S/RU

4 – 22

2) Power failure details(Power LED flashes twice and OPC LED flashes)

Error type

OPC LED operation (1 cycle)

Description

PS_ON

H: On 

AC_DET(IC2002_16pin): Abnormal (L). Main converter 12V is not 
applied.

12V failure

If error is detected during operation, the power is turned on again 
by interrupt handling.

Flashes once

L: Off

PS_ON

H: On 

DET_10V(IC2002_57pin): Abnormal (L). Main power UR13V is 
not applied.

10V failure

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

Flashes 3 times

L: Off

D_POW

H: On

DET_D3V3(IC2002_59pin): Abnormal (L). D3.3V is not applied.

Digital 3.3V failure

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

Flashes 4 times

L: Off

PANEL_POW

H: On

DET_PNL12V(IC2002_58pin): Abnormal (L). Panel power is not 
applied.

Panel 12V failure

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

Flashes 5 times

L: Off

Main failure

H: On

Main microprocessor detection error
The details are displayed on page 1 of process adjustment for the 
main microprocessor (IC8101).

Flashes 7 times

L: Off

3) Communication failure details(Power LED flashes 3 times and OPC LED flashes) 

Error type

OPC LED operation (1 cycle)

Description

Initial communica-
tion reception failure

H: On

Initial communication from the main CPU (IC8101) is not received.
→Communication line failure or main CPU (IC8101) start-up fail-
ure

Flashes once

L: Off

Start-up confirma-
tion reception failure

H: On

Start-up reason confirmation from the main CP(IC8101) is not 
received.
→Main CPU (IC8101) start-up failure or monitor microprocessor 
(IC2002) reception failure

Flashes twice

L: Off

Regular communi-
cation failure

H: On

Regular communication that is performed at 1 second intervals in 
the normal operation is interrupted.
→Main CPU (IC8101) operation failure or monitor microprocessor 
(IC2002) reception failure

Flashes 3 times

L: Off

Restart failure

H: On

When restarted by a software with the standby off/on, restart com-
pletion notification is not received.
→Main CPU (IC8101)restart failure to monitor microprocessor 
(IC2002) reception failure

Flashes 4 times

L: Off

LC-32XL8E/S/RU, LC-37XL8E/S/RU

4 – 23

 — MEMO —

LC-32XL8E/S/RU, LC-37XL8E/S/RU

4 – 23

 — MEMO —