1-40 (No.YA100)
< Page 2 of screen (DISPLAY UNIT) >
5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.
< Explanation of operation >
If error is detected, the power is turned off.
Shortly after a power is turned off, POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.
Detection item
Display
Detection content
Diagnosis
signal
(line)
Detection timing
Fan lock
[PD-50X795]
FAN
Confirm the operation of the cooling
fan.
IC807 [DISPLAY INTERFACE PWB]
FAN_LOCK Detection starts 8 seconds after the power is
turned on.
Detection is performed every 16ms.
If errors continues between 300ms the power
is turned off.
Abnormal of operation
of PDP (PANEL)
ALM
Confirm the operation of the panel
protection.
[PDP UNIT]
SDA
Detection starts 8 seconds after the power is
turned on.
Detection is performed every 16ms.
If errors continues between 300ms the power
is turned off.
Abnormal rise of
temperature in PDP
(PANEL)
TMP
It detects whether the temperature in a
display unit is normal.
IC8101 [TEMP. SENSOR PWB]
SDA
Detection starts 8 seconds after the power is
turned on.
Detection is performed every 0.5 seconds.
If a temperature rises beyond the temperature
of 71ºC for detection of error over the
predetermined 120 times the power is turned
off.
Abnormal rise of
temperature in AUDIO
PWB
ATP
Not used.
---
Not used.
Short circuit detection
of AUDIO PWB
ASH
Not used.
---
Not used.
Panel communication
PNL
It confirm whether panel
communication is normal.
[PDP UNIT]
SDA
If it checks whenever I
2
C communication is
performed and no reply of ACK signal an error
will be counted.
Panel memory
MEM
Confirmation of reply of ACK signal
which uses I
2
C communication.
IC805 [DISPLAY INTERFACE PWB]
SDA
Same as above.
Temp. sensor
operation
TMP
Same as above.
IC8101 [TEMP. SENSOR PWB]
SDA
Same as above.
Audio control
AIO
Same as above.
IC6521 [AUDIO PWB]
SDA
Same as above.
Type of error
Display
POWER LED flash cycle
Unit
Low bias line short protection
LOB
Low luminance blue Flash 1.0 second / Low luminance blue Out 1.0 seconds
RECEIVER UNIT
Fan lock [Receiver unit]
FAN
Low luminance blue Flash 0.1 second / Low luminance blue Out 0.1 seconds
RECEIVER UNIT
ATSC digital tuner error
---
Low luminance blue Flash 2.0 second / Low luminance blue Out 2.0 seconds
RECEIVER UNIT
Fan lock [Display unit]
FAN
High luminance blue Flash 0.1 second / High luminance blue Out 0.1 seconds
DISPLAY UNIT
[PD-50X795]
Abnormal of operation of PDP (PANEL)
ALM
High luminance blue Flash 1.0 second / High luminance blue Out 1.0 seconds
DISPLAY UNIT
Abnormal rise of temperature in PDP (PANEL)
TMP
High luminance blue Flash 2.0 second / High luminance blue Out 2.0 seconds
DISPLAY UNIT
d u p
a t o
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