Panasonic PT-DZ770U / PT-DZ770E (serv.man8) Service Manual ▷ View online
5. 2. 2. Repair
1. Since this projector is very strong light output, when checking the projection screen, please UV protection glasses
and select to "single" lamp mode. If the projection distance is short, please pay particular attention.
2. When electrifying the projector for the check and adjustment with top case taken off, the strong light emits from the
lighting cover and its around. Please take the use of UV protection glasses and means of the shading.
3. While the fan is working, do not pull the plug out nor disconnect the breaker.
* When the monitor of power supply lamp turns red and the fan stops, disconnecting can be done.
4. Make sure to turn off the power before repair.
* When replacing the print board, the internal electrical parts can be broken by the static electricity of clothes or
human body. Be careful of static electricity and wear the anti-static electricity globes.
5. After finishing the repair, check whether it works properly or not.
Check the image with 10 steps or gray scales that can show the gradation and perform self-check.
5. 2. 3. Replacement of A-P.C.Board
the section 3. "Adjustment".
* Down load the adjustment software from our Projector service web site.
If you cannot transfer the data that uses the service software, remove IC3102-IC3104 from the original board
and mount them on the new board.
5. 2. 4 Replacement of WL-P.C.Board
When WL-P.C.Board is replaced, the MAC address of wired LAN will be changed.
Explain it to the customers in advance.
Explain it to the customers in advance.
5. 3. Replacement of consumable parts
Attention:
If replacing A-P.C.Board (assembly), read the ROM data from the old P.C.Board and write it in the new one according to
INF - 15
Attention:
* When replacing the consumable parts, please make sure that the main power is OFF and power cable is disconnected.
* Do not replace the lamp unit when it is hot. (Wait at lease one hour after use.)
5. 3. 1. When to replace the lamp unit
1. The lamp unit is a consumable component. Since its brightness gradually decreases over time, it is necessary
to replace it regularly. The estimated duration before replacement is 2 000 hours.
However, this may be shortened depending on individual lamp characteristics, usage conditions, and the
installation environment. Therefore, it is strongly recommended that a replacement lamp unit be prepared.
2. To predict when to replace the lamp, check the lamp cumulative operating hours displayed in lamp1-2 of "STATUS".
3. The unit can damage the projector if it has not been replaced after 2 000 hours of usage.
Thus, the lamp automatically turns off after approximately ten minutes.
If the cumulative operating time of all lamp unit bulbs exceeds 2 000 hours, the power will be switch off after
about 10 minutes.
Note: 2 000 hours is not warranty hours, but guideline for replacement.
INF - 15
5. 3. 2. 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.
5. 3. 3. 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.
① Open it sparsely.
② Slide it towards the control buttons, then pull it.
② Slide it towards the control buttons, then pull it.
Lamp unit cover fixing screw
Lamp unit cover
Lamp unit2
Fixing scres
Lamp unit1
Fixing screws
Handle
INF - 16
5. 3. 4. 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.)
5. After cleaing the air filter unit, install the filter unit and the air filter cover.
* Perform the disconect step in the reverse order.
* Air filter unit has installed direction . （Check the mark on the Tabs of Air filter unit)
5. 4. 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
button for more than 2 seconds.
Air filter cover
Air filter cover screw
Air filter unit
Tabs
* Mark for direction of
the air filter unit
the air filter unit
INF - 17
6. Troubleshooting
6. 1. Shutdown system
When something wrong such as stop of fan happens, the projector has a function to be on standby immediately.
Value "**" is changed by "Lamp mode", or "Fan mode" and "Setting attitude"
Counter value is displayed in ○.
Lamp usage hour is over the guideline.
（Convert at Lamp power [HIGH] mode）
（Convert at Lamp power [HIGH] mode）
LAMP LED blinks once
Lamp memory (EEPROM)
communication:
⇒No response(ACK)
communication:
⇒No response(ACK)
LAMP LED lights
No flashing or blinking
Optical module temperature sensor
⇒More than ** degrees C
⇒More than ** degrees C
TEMP LED Blinks 2
times
(Warning: TEMP LED
lights)
times
(Warning: TEMP LED
lights)
Cooling liquid pump speed
⇒Slower than 1000rpm more than 5
sec.
⇒Slower than 1000rpm more than 5
sec.
Intake air temperature sensor
⇒More than 48 degree C
（High altitude mode: more than 43
degree C）
⇒More than 48 degree C
（High altitude mode: more than 43
degree C）
Ballast block:
Thermal protector (SW9601)
⇒ Over 115±5 degrees C
(Returns with 80±15 degree C)
Thermal protector (SW9601)
⇒ Over 115±5 degrees C
(Returns with 80±15 degree C)
Optical module temperature sensor
⇒After lamp lighting, less than 5
degrees C for more than 5 minutes.
⇒After lamp lighting, less than 5
degrees C for more than 5 minutes.
STANDBY/ON LED
blinks in red 4 times
blinks in red 4 times
Inter lock SW
⇒Open the rear cover more than 1
seconds.
⇒Open the rear cover more than 1
seconds.
Monitor LED indication
－
Cooling liquid unit pump has problem
OSD warning
－
Exhausting temperature sensor
⇒Under -20 degree C
⇒Under -20 degree C
－
Each ＦＡＮ sense signal
⇒Slower than 50% of target for
more than 5 sec.
⇒Slower than 50% of target for
more than 5 sec.
STANDBY/ON LED: Red
TEMP LED: Lights
TEMP LED: Lights
STANDBY/ON LED
blinks in red 3 times
blinks in red 3 times
Replace lamp Power off (Standby)
after ○ min“
after ○ min“
Shutdown detection
"TEMPERATURE WARNING "
Intake air temperature problem
Filter clogging
High temperature of environment
Intake air window is closed.
Filter clogging
High temperature of environment
Intake air window is closed.
Exhaust temperature error.
Closed ventilator
Deteriorating exhaust fan
High altitude mode is not on
Closed ventilator
Deteriorating exhaust fan
High altitude mode is not on
Optical module temperature is low.
Adjust the setting circumstances.
Adjust the setting circumstances.
Intake air temperature sensor
⇒Under -20 degree C
⇒Under -20 degree C
Optical block temperature sensor
⇒Under -20 degree C
⇒Under -20 degree C
Exhaust temperature sensor
⇒More than ** degrees C
⇒More than ** degrees C
Lamp hours is over.
⇒2000 hours
(Shuts down after 10 min.)
⇒2000 hours
(Shuts down after 10 min.)
－
DMD drive circuit is faulty or
Signal processing unit PCB is faulty or
Connector connection is faulty
Signal processing unit PCB is faulty or
Connector connection is faulty
Color wheel rotation speed
⇒Over 202Hz or Under 70Hz
⇒Over 202Hz or Under 70Hz
Rotation problem with color wheel
FPGA initialized or
Communication error or
Formatter initial error
Communication error or
Formatter initial error
Possible factor
Blown out of the fuse
( with some reason )
( with some reason )
Bimetal is OFF (with some reason)
Setting environment confirmation is required.
Setting environment confirmation is required.
Inductor clogging
Something wrong with Ballast block
Something wrong with Ballast block
－
Power fuse
⇒15A 250V
⇒15A 250V
Thermal fuse
(Automatic restoration type)
⇒More than 152 degrees Celsius
(Automatic restoration type)
⇒More than 152 degrees Celsius
－
Rear cover is not installed.
－
TEMP LED Blinks 3 times
－
Fan rotation problem
Connection problem with Intake air temperature
sensor
Faulty temperature sensor
sensor
Faulty temperature sensor
Connection problem with optical block temperature
sensor
Faulty temperature sensor
sensor
Faulty temperature sensor
Connection problem with exhausting temperature
sensor
Faulty temperature sensor
sensor
Faulty temperature sensor
－
－
LAMP LED blinks 3 times
Lamp status
⇒Lamp is off during the status other
than normal one
⇒Lamp is off during the status other
than normal one
Failed making lamp ON, lamp abnormal condition
Ballast block faulty
Hot restart
Ballast block faulty
Hot restart
FILTER LED blinks once
(RED)
(RED)
Filter is not installed
⇒Filter detect (SW1501)
Not detect more than 10 minutes
⇒Filter detect (SW1501)
Not detect more than 10 minutes
Optical module error.
Cooling liquid unit attachment error
Clogged ventilator
High altitude mode is not on
Cooling liquid unit attachment error
Clogged ventilator
High altitude mode is not on
Filter is not installed
Lamp is not installed
Cable for lamp memory has bad contact or
connection.
Cable for lamp memory has bad contact or
connection.
－
－
"TEMPERATURE WARNING "
－
“REPLACE FILTER.
IN ○ MINUTES,POWER WILL TURN
OFF
AND GO INTO STANDBY MODE
AUTOMATICALLY”.
IN ○ MINUTES,POWER WILL TURN
OFF
AND GO INTO STANDBY MODE
AUTOMATICALLY”.
46 degrees C (high altitude 41
degrees C) "TEMPERATURE
WARNING"
44 degrees C (high altitude 39
degrees C) "warning cancel"
degrees C) "TEMPERATURE
WARNING"
44 degrees C (high altitude 39
degrees C) "warning cancel"
－
INF - 18
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