Panasonic PT-60LCX64-K, Service Manual, Page: 120 / 279

Mis-installed the Lamp Cover
(The Lamp Cover is open).
The Temperature Sensor (R2811) on the Thermistor 1
C.B.A. on the Fan 1 is short or open.
Lamp voltage is not correct due to short of the Lamp.
The Ballast C.B.A. is defective.
1. The Lamp is not cooled off.
2. Thermal Fuse Unit (115˚C (239˚F)) is defective
(open).
3. The Lamp is defective (crack).
4. The Lamp voltage becomes more over 130V or
less than 30V.
5. The Ballast C.B.A. is defective.
6. The Main C.B.A. is defective.
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.")
How to solve the problem indicated by the Error Indication of LED
Problem Possible Solution
2)
3)
4)
6)
7)
8)
5)
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.
It indicates when the temperature detected by the
Temperature Sensor (R2811) on Thermistor 1 C.B.A.
exceeds 55
°
C (131
°
F).
1. The surrounding temperature of the place of use may
be too high.
2. The vents on the rear may be blocked.
Thermal fuse (F1302) 117
°
C (243
°
F) on the Ballast
C.B.A. is open due to abnormal temperature rise.
Error No.
Tighten the screw of the Lamp Cover
Unit.
Check if the voltage at Pin 66 of
IC6003 on the Main C.B.A. is
approx. 0V. (Lamp Cover Open (H))
Replace IC6003.
Still NG
Still NG
NO
1. Confirm that all connector cables are connected to the connectors correctly.
2. Check the following Temperature data lines.
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.
NO
NO
Check if the voltage at Pin 16 of
P2501 on the LCD Drive C.B.A. is
approx. 0V.
Check if the voltage at Pin 16 of
P5302 on the Main C.B.A. is approx.
0V.
Replace the Cover SW (SW2911)
on the Cover Switch C.B.A.
Check the signal line between Pin
16 of P2501 and Pin 1 of P2502 on
the LCD Drive C.B.A.
Repair if necessary.
YES
YES
Disconnect P2303 connector on the
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
Ω
~200k
Ω
.
Check if the voltage at Pin 4 of
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).
Check if the voltage at Pin 20 of P5302
on the Main C.B.A. is +0.5V~+4V.
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.
Replace the Temperature Sensor
(R2811) on the Thermistor 1 C.B.A.
NO
NO
YES
Check the signal line between Pin
20 of P2501 and Pin 2 of P2303 on
the LCD Drive 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.
Still NG
NO
YES
Check IC6302 and the surrounding
parts on the Main C.B.A.
Repair if necessary.
YES
YES
PT-60LCX64-K
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