JVC pd-42dxt, Service Manual

Page: 54 / 56

PD-42DXT
1-54 (No.52108)
• PAGE 2
4.1.7 DISPLAY METHOD WHEN RASTER IS NOT AVAILABLE
When raster is not displayed due to failure of the set, the POWER LED light will flash to indicate the ailure mode.
Trigger for forced shutdown of power is stored and displayed.
<Details on Operation>
Power of TV will be turned off when NG is detected for "Panel Error" and "LOB Protection". "POWER LED" will start flashing imme-
diately after power is turned off and power of tuner and panel cannot be turned on upon shutdown until the AC plugs are discon-
nected once and reconnected.
Item Display Description of detection
Diagnosis
signal (line)
Means of detection Unit
PANEL
TEMPERATURE PRO Is temperature of thermostat in
PDP proper? SDA Detection starts 5 seconds upon
power on Performs detection every
16ms and turns off power if NG lasts
for 500ms Display
PANEL
OPERATION LVP Is panel protection activated
properly? SDA Same as above Display
PANEL
OPERATION ALM Is panel protection activated
properly? SDA Same as above Display
PANEL
TEMPERATURE
RISE TMP Is temperature in PDP proper? SDA Performs detection every 0.5 sec and
turns off power if number of times
temperature exceeds service setting
beyond acceptable limit Display
AUDIO
TEMPERATURE ATP Not used (Only display) - - -
Audio Terminal AMP Not used (Only display) - - -
Memory MEMP Is ACK returned during I
2
C
transmission? [IC1703]
SDA Monitors upon every I
2
C transmission
and counts if ACK is not returned
Display
INSIDE
TEMPERATURE
OF A RECEIVER
UNIT TEMP Is temperature in receiver proper?
[IC505] SDA Turns off power if temperature in
receiver is 73 degrees Celsius or
higher. Receiver
DEVICE DRIVER
COLOR
MANAGEMENT DDT Is ACK returned during I
2
C
transmission? [IC401]
SDA Monitors upon every I
2
C transmission
and counts if ACK is not returned.
Receiver
DEVICE DRIVER
COLOR
MANAGEMENT DDP Same as above [IC401] SDA Same as above Display
Fan FAN Not used (Only display) - - -
A/D CONVERTER AD Is ACK returned during I
2
C
transmission? [IC001]
SDA Monitors upon every I
2
C transmission
and counts if ACK is not returned.
Receiver
DVI DVI Same as above [IC7701] SDA Same as above Receiver
Trigger of error Display LED flash cycle of receiver unit LED flash cycle of display unit
LOB Protection LOB Every 2.0 secs Red every 1.0 sec
Panel
PRO Every 1.0 sec Green every 0.1 sec
ALM Every 1.0 sec Green every 1.0 sec
TMP Every 1.0 sec Green every 2.0 sec