Sharp LC-40D68UT Service Manual page 64

LC-40D68UT
2) Power error details (Power LED flashes twice and OPC LED flashes)
Error type
DET_POW1 error H: On
Flashes once
L: Off
DET_POW2 error H: On
Flashes twice
L: Off
DET_6V error H: On
Flashes 3 times
L: Off
PNL_POW0 error H: On
Flashes 5 times
L: Off
Main error H: On
Flashes 7 times
L: Off
3) Communication error details (Power LED flashes 3 times and OPC LED flashes)
Error type
Initial communication reception
error
Flashes once
Time-out setting reception error
Start-up confirmation reception
error
Flashes twice
Regular communication error
Flashes 3 times
OPC LED operation (1 cycle)
OPC LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
Pins are monitor microprocessor pins unless otherwise
DET_POW1 error (L).
Detected by the above polling.
UR13V is not applied.
DET_POW2 error (L).
Detected by the above polling.
Detection starts in 400 ms after SMPOW becomes High.
D3.3V is not applied.
DET_6V error (L).
D5V or A5V is not applied.
DET_POW0 error (L).
Detected by the above polling.
Detection starts in 400 ms after PNL_ON becomes High.
Panel power is not applied.
Main microprocessor detection error.
(FAN error, 1bitAMP error, etc.)
Basically, log analysis of debug print statements or communi-
cation log analysis by a bus monitor is performed.
Initial communication from the main CPU is not received. If initial
communication from the main microprocessor is not received
within 15 seconds during start-up, it is judged to be an error.
The unit is reset and restarted until the third error, and error
standby is activated at the fourth error.
Communication line error or main CPU start-up failure.
Time-out setting and start-up mode change from the main CPU is
not received.
Main CPU start-up failure or front microprocessor reception failure.
In the operation state, regular communication is performed every 1
second. If communication from the min CPU is not received five
times in a raw, it is judged to be a regular communication error.
The regular communication errors are counted. The unit is reset
and restarted until the third error, and error standby is activated at
the fourth error.
The regular communication error counter is cleared to 0 when nor-
mal operation continues for 10 minutes.
Main CPU start-up failure or front microprocessor reception failure.
6 – 15
specified.