Panasonic PT-60LCX64-K Service Manual page 120

PT-60LCX64-K
How to solve the problem indicated by the Error Indication of LED
Error No.
2) Mis-installed the Lamp Cover
(The Lamp Cover is open).
The Temperature Sensor (R2811) on the Thermistor 1
3)
C.B.A. on the Fan 1 is short or open.
It indicates when the temperature detected by the
4)
Temperature Sensor (R2811) on Thermistor 1 C.B.A.
exceeds 55 C (131 F).
1. The surrounding temperature of the place of use may
2. The vents on the rear may be blocked.
1. The Lamp is not cooled off.
5)
2. Thermal Fuse Unit (115˚C (239˚F)) is defective
3. The Lamp is defective (crack).
4. The Lamp voltage becomes more over 130V or
5. The Ballast C.B.A. is defective.
6. The Main C.B.A. is defective.
Lamp voltage is not correct due to short of the Lamp.
6)
Thermal fuse (F1302) 117 C (243 F) on the Ballast
7)
C.B.A. is open due to abnormal temperature rise.
The Ballast C.B.A. is defective.
8)
Problem
be too high.
(open).
less than 30V.
Possible Solution
Tighten the screw of the Lamp Cover
Unit.
Still NG
Check if the voltage at Pin 66 of
YES
IC6003 on the Main C.B.A. is
approx. 0V. (Lamp Cover Open (H))
NO
Check if the voltage at Pin 16 of
YES
P5302 on the Main C.B.A. is approx.
0V.
NO
Check if the voltage at Pin 16 of
YES
P2501 on the LCD Drive C.B.A. is
approx. 0V.
NO
Replace the Cover SW (SW2911)
on the Cover Switch C.B.A.
Still NG
Check the signal line between Pin
16 of P2501 and Pin 1 of P2502 on
the LCD Drive C.B.A.
Repair if necessary.
1. Confirm that all connector cables are connected to the connectors correctly.
2. Check the following Temperature data lines.
Disconnect P2303 connector on the
NO
LCD Drive C.B.A. and check if the
resistance between Pin 1 and Pin 2
of P2811 on the Thermistor 1 C.B.A.
is 5k ~200k .
YES
Check if the voltage at Pin 4 of
YES
IC6302 on the Main C.B.A. is +0.5V~
+4V (Temperature Data3) and Pin 5
of IC6302 on the Main C.B.A. is
approx. 0V (Temperature Data4).
NO
YES
Check if the voltage at Pin 20 of P5302
on the Main C.B.A. is +0.5V~+4V.
NO
Check the signal line between Pin
20 of P2501 and Pin 2 of P2303 on
the LCD Drive C.B.A.
Repair if necessary.
Still NG
Replace the 20-pin Cable (Ref. No. 14)
between P5302 on the Main C.B.A.
and P2501 on the LCD Drive C.B.A.
1. Relocate the unit to a proper location.
• Do not place in direct sunlight and other sources of direct heat.
• Do not place the unit in humid or dusty location, or areas exposed to smoke or steam.
(surrounding temperature should be between 0 C (32 F) and 40 C (104 F) and humidity
should be between 20 % and 80 % (with no condensation).)
• The vents are not blocked.
It is recommended that a gap of at least 10 cm is left all around the unit even when it is
placed inside a cabinet or between shelves.
2. Check if the fans are operating properly.
1. Confirm that the Thermal Fuse Unit (115˚C(239˚F)) on the Lamp House is not open.
2. Wait until the Lamp is cooled off and try to turn the power back on. If same error LED
indication continues, remove the Lamp and visually inspect it. If it is cracked, it must be
replaced. If the Lamp is not cracked, check the Ballast C.B.A. (Refer to "CHECKING THE
BALLAST C.B.A.")
3. If still NG, replace the Main C.B.A.
1. Wait until the Lamp is cooled off.
2. Replace the Lamp.
Check the Ballast C.B.A. (Refer to "CHECKING THE BALLAST C.B.A.")
If the Lamp does not light up after attempting to turn on the power twice or three times,
check the Ballast C.B.A. (Refer to "CHECKING THE BALLAST C.B.A.")
120
Replace IC6003.
Check the signal line between Pin 66
of IC6003 and Pin 16 of P5302 and
the surrounding parts on the Main
C.B.A.
Repair if necessary.
Replace the 20-pin Cable (Ref.
No. 14) between P5302 on the Main
C.B.A. and P2501 on the LCD Drive
C.B.A.
Replace the Temperature Sensor
(R2811) on the Thermistor 1 C.B.A.
Check IC6302 and the surrounding
parts on the Main C.B.A.
Repair if necessary.
Check the signal line between Pin
20 of P5302 and Pin 4 of IC6302 on
the Main C.B.A. and the surrounding
parts.
Repair if necessary.