Sharp LC-40LE820E, Service Manual

Page: 73 / 158

LC-40/46/52LE820E, LC-40/46LU820E
7 – 16
4) Communication failure details (Low-speed blinking: Flashes 3 times + High-speed blinking)
5) Other failure details (Low-speed blinking: Flashes 4 times + High-speed blinking)
Error type Expression of Central Icon LED Note: Basically, debug print logs are analyzed or
communication logs are analyzed by a bus monitor.
Initial communication
reception failure
Flashes once
(High speed) H: ON
L: OFF
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 failure
Start-up confirmation
reception failure
Flashes twice
(High speed) H: ON
L: OFF
Start-up reason confirmation from the main CPU cannot be
received.
(Startup communication until start-up reason notification command
is not received.)
→
Main CPU start-up failure or monitor microprocessor reception
failure
Regular communica-
tion failure
Flashes 3 times
(High speed)
H: ON
L: OFF
Regular communication that is performed at 1 second intervals in
the normal operation is interrupted.
→
Main CPU operation failure or monitor microprocessor
reception failure
Other communica-
tion failure
Flashes 5 times
(High speed)
H: ON
L: OFF
When a request (PM_REQ=H) is sent from the main microproces-
sor, the request command is not output from the main CPU, etc.
→
Main CPU operation failure or monitor microprocessor
reception failure
Error type Expression of Central Icon LED Note: Pins are monitor microprocessor pins unless otherwise
specified (IC2002).
Monitor temperature
failure
Flashes once
(High speed)
H: ON
L: OFF
If the panel temperature is 60
°
C or more for 15s or more in a row,
CAUTION appears on the OSD (flashes in red in the lower right
screen).
If the panel temperature is 60
°
C or more for 25s or more in a row,
error standby is activated.
(MONITOR MAX TEMP on page 13/21 of the adjustment process:
Change AD value for temperature failure): Thermistor
Main failure
Flashes 3 times
(High speed)
H: ON
L: OFF
Main microprocessor detection error (CPU temperature error, etc.)
Details are displayed on page 1/21 of the adjustment process for
the main microprocessor.