Sharp LC-60E77UN Service Manual page 62

LC-60E77UN/LC-65E77UM/LC-C6077UN/LC-C6577UM
When C-S FPC(2 pieces) is replaced, does screen display normally?
NO
When C-PWB is replaced, does screen display normally?
NO
Replace Panel HIRAKI.
(Adjust "VCOM ADJ" after replace Panel HIRAKI)
LED flashing timing chart for error notification.
1) Power LED (Large classification)
Error type
Lamp error H: On
Flashes once: Fast
L: Off
Power error H: On
Flashes twice
L: Off
Communication error H: On
with the main CPU
Flashes 3 times
L: Off
Monitor temperature H: On
error
Flashes 5 times
L: Off
Program area data H: On
destruction
Flashes 8 times
L: Off
Trouble Shooting Panel Module
Replace C-S FPC(2 pieces).
Replace C-PWB
(Adjust "VCOM ADJ" after replace C-PWB).
250ms
Power green LED operation (1 cycle)
YES
YES
1sec
Pins are monitor microprocessor (IC2002) pins.
ERR_PNL (40pin): L error. Confirmed after 8 consecutive detec-
tions at 64 ms intervals (detected only when the backlight is on).
Note that after five detection counts, the lamp cannot be activated
except in the monitoring process.
[Clearing method of the accumulated counts]
• Set "LAMP ERROR RESET" on page 2 of the process A to 0.
Refer to "Power error details".
Refer to "Communication error details".
Communication line error or main CPU communication error →
Check debug statements for the main CPU.
Communication line with the main CPU: TxD (28pin), RxD (29pin).
If the panel temperature is 60°C or more for 15 seconds or more in
a row, CAUTION appears on the OSD ("TEMPERATURE" flashes
in red in the lower right portion of the screen).
If the panel temperature is 60°C or more for 25 seconds or more in
a row, error standby is activated.
[Avoidance method] Reduce the value of MONITOR MAX TEMP
(temperature protection threshold) on page 35 of the process A.
Flash ROM data error in the microprocessor.
[Recovery method] Write the microprocessor software.
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