Panasonic PT – DZ770U – How to replace the lamp – Air filter cleaning – Led blinking and cusses

Panasonic PT – DZ770U – How to replace the lamp – Air filter cleaning – Led blinking and cusses – How to initialize – Service mode – Projector repair and service

Panasonic PT – DZ770U: Replacement procedure for lamp unit
1. Power off the projector and disconnect the power plug from the power outlet.
And wait at least one hour, and then check if the lamp unit has been cooled down.
2. Loosen the lamp unit cover fixing screw (one screw) until it turns freely, and then open the lamp unit cover in the direction of the arrow.

3. Loosen the lamp unit fixing screw (three screws each) until it turns freely, and then holding the handles, pull out the lamp unit from the projector.

4. Install the Lamp units and install the lamp unit cover. Perform the disconect step in the reverse order.

Projector does not turn on by protection circuit, if Lamp unit or Lamp unit cover are installed inperfect. When you replace yje new lamp unit, the projector resets the total usage time of the lamp unit automatically.

Air filter maintenance
1. The air filter is clogged with dust, causing the filter replacement message to appear on the screen and the filter indicator <FILTER> to light in red. In such a case, clean the air filter unit.
2. The proceeds of the air filter clogging, becomes hot of projector inside, and <TEMP>indicator is lit , power shut down. Then <FILTER>Indicator remains red , <TEMP> indicator will blink (2 times) red.
3. Indication of cleaning is 12,000 hours. but varies greatly depending on the usage environment. If dirt does not come off even if the unit is maintained, it is time for the unit to be replaced.

Cleaning procedure for air filter unit
1. Power off the projector and disconnect the power plug from the power outlet.
And wait at least one hour, and then check if the lamp unit has been cooled down.
2. Loosen the lamp unit cover fixing screw (one screw) until it turns freely, and then remove the Air filter cover.

3. Hold the tabks on the air filter unit and pull out the air filter unit from the projctor.

4. Clean and dry the air filter unit.

1) Soak the air filter unit in cold or warm water and then lightly rinse it.

 Do not use cleaning tools such as brushes.
When rinsing, fold the frame of the air filter unit without putting strong
pressure on the filter unit.
2) Rinse the unit two to three times using fresh water each times.
3) Let the unit naturally dry off in a well-ventilated place where there is little
dust and the unit is protected from direct sunlight.
After clearing the air filter unit, make sure that it is sufficiently dry before reinstalling it to the projector.
Do not dry using drying devices such as dryers. (Please read the page 'Maintenance / Replacement' on the instruction book to know about diatils.)

Initialization for menu lock password

Follow the procedure below to initialize the password to the default "AAAA".
1. While menu lock password is shown on the screen, press ‘AUTO SETUP’ button on remote controller or operation panel for more than 2 seconds.
2. Press Down  button for more than 2 seconds.

LED BLINIKING AND CAUSE

Monitor LED indication	Shutdown detection	Possible factor
STANDBY/ON LED blinks in red 4 times	Inter lock SW Open the rear cover more than 1 seconds.	Rear cover is not installed.
STANDBY/ON LED blinks in red 3 times	FPGA initialized or Communication error or Formatter initial error	DMD drive circuit is faulty or Signal processing unit PCB is faulty or Connector connection is faulty
	Color wheel rotation speed Over 202Hz or Under 70Hz	Rotation problem with color wheel
STANDBY/ON LED: Red TEMP LED: Lights	Optical block temperature sensor Under -20 degree C	Connection problem with optical block temperature sensor Faulty temperature sensor
	Exhausting temperature sensor Under -20 degree C	Connection problem with exhausting temperature sensor Faulty temperature sensor
TEMP LED Blinks 3 times	Each FAN sense signal Slower than 50% of target for more than 5 sec.	Fan rotation problem
	Cooling liquid pump speed Slower than 1000rpm more than 5 sec	Cooling liquid unit pump has problem
TEMP LED Blinks 2 times (Warning: TEMP LED lights)	Intake air temperature sensor More than 48 degree C 　　（High altitude mode: more than 43 degree C）	Intake air temperature problem Filter clogging High temperature of environment Intake air window is closed.
	Optical module temperature sensor 　More than ** degrees C	Optical module error. Cooling liquid unit attachment error Clogged ventilator High altitude mode is not on
	Optical module temperature sensor After lamp lighting, less than 5 degrees C for more than 5 minutes.	Optical module temperature is low. Adjust the setting circumstances.
	Exhaust temperature sensor More than ** degrees C	Exhaust temperature error. Closed ventilator Deteriorating exhaust fan High altitude mode is not on
LAMP LED blinks 3 times	Lamp status Lamp is off during the status other than normal one	Failed making lamp ON, lamp abnormal condition Ballast block faulty Hot restart

Service Mode

This model has Service Mode in addition to regular on screen menu (user mode).
This mode enables some menu settings for the service operation.
Setting to Service Mode
2. Input "1565" by remote controller and press ENTER. Then it goes into the Service Mode.
3. Press MENU button on the main body or remote controller and the menu of Service Mode is displayed.
Resetting to User Mode
2. Input "0000" by remote controller and press ENTER. Then the Serviceman Mode is disabled.
3. Press MENU button on the main body or remote controller and the menu of User Mode is displayed
1. Press menu button of main body or remote controller and go to Main menu -> "Projector setup".
Then go to sub menu and select "Service Password" and press ENTER.
1. Press menu button of main body or remote controller and go to Main menu -> "Projector setup".
Then go to sub menu and select "Service Password" and press ENTER