Panasonic PT-52LCX66-K, Руководство по обслуживанию, Страница: 30 / 223

Cooling Fan (Fan 1, Fan 2 and/or Fan 3) malfunction.
DT+5V line on the Main P.C.B. error.
Communication error I2C SERIAL DATA for between
IC6001 (Pin 85) and IC5001 (Pin B22) on the Main
P.C.B.
The temperature sensor (R2821) on the Thermistor 2
P.C.B. on the Lamp Top Panel is short or open.
It indicates when the temperature detected by the
Temperature Sensor (R2821) on Thermistor 2 P.C.B.
exceeds 105 ˚C (221 ˚F).
1. The surrounding temperature of the place of use
may be too high.
2. The vents on the rear may be blocked.
Clogged Air Filter of the Fan Case Unit.
When the Iris Mechanism fails to reach the objective
angle of +/- 2˚ in two consective seconds.
When power is turned on, the Iris Mechanism
performs calibration to incorporate variations
detected by the Hall Sensor.
A maximum current (+) and (-) is supplied to the
Motor and the Mechanism moves to the full-open/
full-close position.
An error occurs when this angle is measured by the
Hall Sensor and full-open/ full-close is not reached,
or when the angle difference is outside the
controllable range.
Error
No.
Problem Possible Solution
7)
2)
3)
4)
8)
9)
10)
5)
6)
How to solve problems indicated by the Error Indication of LED
(The symptom of all errors is that Lamp goes off or Lamp does not light up)
Note: Before performing the troubleshooting, confirm that all connector cables in the unit are connected correctly.
1)
Following voltage lines on the Main P.C.B. is over
voltage or over current.
• DT+9V line
• DT+5V line
• SW+3.3V line
• SW+2.5V line
The Main P.C.B. is defective.
(Refer to "CHECKING THE MAIN P.C.B.")
Replace the Iris Unit.
1. Replace the Iris Unit.
2. If still NG, replace IC9500, IC9501, IC9502, etc. on the Iris P.C.B.
Are Fan 1, Fan 2
and Fan 3 operating
for a moment just
after the power is
turned on?
Check IC2702, IC2703, and IC2704, and
the surrounding parts on the LCD Drive
P.C.B., and replace if necessary.
All Fans stop.
Replace Fan 1.
If still NG, check IC2702 and the
surrounding parts on the LCD Drive P.C.B.,
and replace if necessary.
Replace Fan 2.
If still NG, check IC2703 and the
surrounding parts on the LCD Drive P.C.B.,
and replace if necessary.
Only Fan 1 stops.
Only Fan 2 stops.
Only Fan 3 stops.
Replace Fan 3.
If still NG, check IC2704 and the
surrounding parts on the LCD Drive P.C.B.,
and replace if necessary.
Check the following parts of the +5V line on the Main P.C.B. and the Digital Tuner P.C.B.,
and replace if necessary.
• IC1102 and the surrounding parts (Main P.C.B.)
• R6008, IC6001, and the surrounding parts (Main P.C.B)
• +5V line and the surrounding parts (Digital Tuner P.C.B.)
If still NG, the Power P.C.B. is defective.
(Refer to "CHECKING THE POWER P.C.B.")
Check the following parts of the I2C SERIAL DATA line on the Main P.C.B.,
and replace if necessary.
• IC5001, R5099, R6071, and the surrounding parts
Check the following parts on the Temperature Data 1 line on the LCD Drive P.C.B. and the
Thermistor 2 P.C.B., and replace if necessary.
• R2821 (Temperature Sensor on the Thermistor 2 P.C.B.),
1. Relocate the unit to a proper location.
• Do not place in direct sunlight or other sources of direct heat.
• Do not place the unit in a humid or dusty location, or areas exposed to smoke or steam.
(surrounding temperature should be between 0 ˚C (32 ˚F) and 35 ˚C (95 ˚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.
Clean the Air Filter of the Fan Case Unit. If still NG, replace Fan Case Unit (Fan 1).
If still NG, check the following parts on the Filter Error Detection line on the LCD Drive P.C.B.,
and replace if necessary.
• LVDS Cable between the Main P.C.B. and the LCD Drive P.C.B.
• IC2301, IC2705, and the surrounding parts (LCD Drive P.C.B.)
1. The Lamp is defective (crack).
2. The Power P.C.B. is defective. 1. 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 OK, the Power P.C.B. is defective. (Refer to "CHECKING THE BALLAST CIRCUIT")
PT-52LCX66-K / PT-56LCX16-K / PT-61LCX66-K
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