Read Panasonic TH-98SQ1W (serv.man2) Service Manual online
INF-15
SECTION 1 SERVICE INFORMATION
<98/86SQ1>
4. 2. Self check of power system
When an abnormality has occurred to the unit, the protection circuit operates and resets to the stand by mode. At this time,
the defective block can be identified by the number of blinks of the Power LED .
* The failure code is the PTCT information displayed on the CD mode in the service mode. Refer to the item [3.3. Software,
EEPROM version and failure display (CD Mode)] for further details.
Blinking
times
Failure code
(PTCT)
Contents & Check point
Check point (Caused problem)
1
01
■ PANEL 24V SOS
Detects back light error from the Panel module.
• Abnormality on +24V power line or on panel
module
Check the 24V lines supplied form P module, and
parts or circuit connected to 24V lines, and the con-
nection cables to the back light module on the panel.
(P module, LCD panel module)
4
04
■ PANEL 12V SOS
Detects +12V voltage fall of power supplied from
A module to Panel module (Timing Controller)
• Abnormality on +12V power line to panel
Check the 12V lines supplied form P module, and
parts or circuit connected to 12V lines, and connec-
tion cable to the T-CON module on the panel.
(P module, A module, LCD panel module)
5
05
■ FE SOS
Detects start failure of the video / audio pro-
cessing IC on the FE module or communication
error between this IC and A module.
The FE module is not working properly.
Or communication error between the FE module and
the A module has occurred.
Check the FE module, the A module.
Check the connection cable between the FE module
and the A module.
(FE module, A module)
6
06
■ FRC SOS1
Frame creation IC on the FRC module detects
communication error with the A module.
Communication error between the FRC module and
the A module has occurred.
Check the FRC module, the A module.
Check the connection cable between the FRC module
and the A module.
(FRC module, A module)
7
07
■ TEMPERATURE SOS
Detects high temperature from the temperature
sensor.
• High temperature detection
• Error in data reading of temperature sensor
High temperature was detected by temperature
sensor on A module.
Please check the ambient environment of the display
and lower the temperature.
If the ambient temperature is low enough, the
temperature sensor on the A module may be faulty.
(A module)
8
08
■ FRC SOS2
Detects abnormality in voltage supplied from
the P module to the FRC module.
Abnormality in the power supply line from the P mod-
ule has occurred.
Check the connection cable between the FRC module
and the P module.
(FRC module, A module)
9
09
■ SOUND SOS
• Abnormality on power line to audio amplifier
circuit
Check the audio supply voltage from P module, and
parts or circuit connected to the audio supply line.
(A module)
10
0A
■ SLOT IF SOS
Detects a voltage reduction on the 3.3V and
12V line on the SLOT IF module.
Abnormality in the power line on the SLOT IF module
has occurred.
Check the SLOT IF module, the function board that is
inserted into the SLOT.
Check the connection cable between the SLOT IF
module and the A module / P module.
(SLOT IF module, A module, P module)
13
0D
■ REGULATOR SOS
Detects abnormal voltage on the regulators on
A module.
• Abnormality on power lines, +1.0V, +1.1V,
+1.5V, +1.8V, +3.3V, +5.0V, +16V,
Check the low voltage lines on the A module and
parts or circuit connected to the low voltage line.
( A module )
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