JVC I'Art Palette PD-42X795, Руководство по обслуживанию

Страница: 40 / 243

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
r