Panasonic PT-40LC12 Service Manual page 31

LED INDICATIONS FOR ERROR CONDITION
Each LED indication facilitates finding the cause of the error.
When an error is detected, each LED on the Center Panel will light up or flash when the AC Cord is plugged in.
The detected error data will not be stored in the EEPROM. This data is cleared after the AC Cord is unplugged.
Error No. Error Information
1)
Front Fan stop or
Lamp Fan stop
2) Lamp Cover open
3) Temperature Sensor
short or open
4) Abnormal
Temperature
5) Power Ballast Error
(abnormal
Lamp voltage)
6)
Power Ballast Error
(abnormal
temperature)
7)
Power Ballast Error
(other causes)
8)
Abnormal Voltage
on 16 V line of
LCD Main C.B.A.
9)
Abnormal Voltage
on 14 V line of
LCD Main C.B.A.
10)
Abnormal Voltage
on 7 V line of
LCD Main C.B.A.
11)
Abnormal Voltage
on 3.3 V line of
LCD Main C.B.A.
12)
Temperature Sensor
short or open
13)
Abnormal
Temperature
14)
Duct Fan stop
15)
Clogged air filter
more than 90%
16)
The failure of Lamp
light up
17)
Request for Lamp
Replacement
18)
Request for Filter
Cleaning
Forced cooling
Note:
1. When any of the above errors has occurred, the LED will flash as shown above every 5 seconds.
2. When two or more errors have occurred at the same time, the LED will light up or flash as shown above, and then
change to another every 5 seconds in turn.
3. LAMP OFF: The LED will flash right after the Lamp goes off.
4. Warning OSD appears when the Air Filter is clogged 90%, accumulated operation time of the Lamp reaches 5000 hours,
or accumulated operation time of the Air Filter reaches 400 hours.
5.IC2301 is mounted on LCD Main C.B.A. which is includes in the Projection Unit.
6.IC6001 is mounted on TV Main C.B.A.
POWER LED
TEMP LED
LAMP LED
<Center Panel of the unit>
Fig. 2-1
ERROR DESCRIPTION
IC2301(pin12) detects the Front FAN stop or Lamp
FAN stop, then indicates the error when the Front FAN
or Lamp FAN is stopped.
IC2301(pin76) detects the Lamp Cover Unit condition
(open or close), then indicates the error when the
Lamp Cover Unit is open.
IC2301(pin74 and 75) detects open or short of the Temperature
Sensor (R2911) on Front Thermistor C.B.A., then indicates the
error when Temperature Sensor is open or shorted.
(The error is not detected for 1 minute after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Front FAN by the Temperature Sensor (R2911) on Front
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 43 C.
(The error is not detected for 1 minute after Lamp ON.)
IC2301(pin11) detects the error of the Lamp, then indicates the
error when the Lamp is short-circuit.
IC2301(pin11) detects the error of LCD Power C.B.A.,
then indicates the error when the temperature fuse
(117 C) in LCD Power C.B.A. is open.
IC2301(pin11) detects the error of LCD Power C.B.A. and Lamp,
then indicates the error when an inner malfunction of LCD Power
C.B.A. occurs, the Lamp voltage becomes more than 130V or
less than 30V, Lamp current becomes more than 5A, or the Lamp
is cracked.
IC2301(pin48) detects +16V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +13V.
IC2301(pin47) detects +14V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +11V.
IC2301(pin45) detects +7V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +5.7V.
IC2301(pin44) detects +3.3V line voltage on LCD Main
C.B.A., then indicates the error when the voltage
becomes less than +2.5V.
IC6001(pin86 and 87) detects open or short of the
Temperature Sensor (R2901) on Lamp Thermistor C.B.A.,
then indicates the error when Temperature Sensor is open or
shorted.
(The error is not detected for 4 minutes after Lamp ON.)
IC2301(pin74 and 75) detects the temperature attached near
the Lamp by the Temperature Sensor (R2901) on Lamp
Thermistor C.B.A., then indicates the error when the
temperature becomes more than 60 C.
(The error is not detected for 4 minutes after Lamp ON.)
IC6001(pin85) detects the Duct FAN stop, then
indicates the error when the Duct FAN is stopped.
IC2301(pin82) detects the clogged air filter, then indicates the
error when the air filter is clogged 90%.
IC2301 (pin11) detects the failure of light up processing of
the Lamp, then the POWER LED is changed as follows.
1) POWER LED flashes green for 140 seconds (while turning on).
2) POWER LED flashes red for 60 seconds (while cooling).
3) POWER LED lights up red (standby).
Note: If the Lamp will not light after attempting turning on the
power 2 or 3 times, the Lamp, the LCD Power C.B.A. or the
LCD Main C.B.A. may be defective.
When accumulated operation time of the the Lamp reaches
5000 hours, OSD (replacing the Lamp) appears on the screen.
Note: The Lamp time is stored in EEPROM (IC2305).
When accumulated operation time of the Air Filter reaches 400
hours, OSD (cleaning the Air Filter) appears on the screen.
Note: The Filter time is stored in EEPROM (IC2305).
During forced cooling, this indication is indicated.
Fig. 2-2
POWER LED TEMP LED LAMP LED
flashes orange
once every - -
5 seconds
flashes orange
twice every
- -
5 seconds
flashes once
-
every 5 seconds
-
flashes twice
every 5 seconds
-
-
flashes twice
every 5 seconds
-
-
flashes 3 times
every 5 seconds
-
-
flashes 4 times
every 5 seconds
-
-
flashes once flashes once
every 5 seconds every 5 seconds
-
flashes twice flashes twice
every 5 seconds every 5 seconds
-
flashes 3 times flashes 3 times
every 5 seconds every 5 seconds
-
flashes 4 times flashes 4 times
every 5 seconds every 5 seconds
-
flashes 3 times
every 5 seconds
- -
flashes 4 times
every 5 seconds
-
-
flashes orange
- -
3 times every
5 seconds
flashes 5times
- -
every 5 seconds
flashes green for
140 seconds.
flashing red for
60 seconds.
light up red.
-
-
lights up
- - -
flashes red for flashes 5 times
-
10 minutes every 5 seconds
OSD LAMP OFF