Panasonic PT-VW350 / PT-VW350D / PT-VW350T / PT-VX420 / PT-VX420D / PT-VX420T / PT-VX421 (serv.man4) Service Manual ▷ View online
INF-15
SECTION 1 SERVICE INFORMATION
4. 3. Replacement of consumable parts
[Attention] • When replacing the consumable parts, please make sure that the power cable is disconnected from the outlet.
4. 3. 1. When to replace the lamp unit
The lamp unit is a consumable component. Since its brightness gradually decreases over time, it is necessary to replace the
lamp unit regularly. The estimated duration before replacement is 5 000 hours, but the lamp may go off before reaching to
5000 hours, depending on the characteristics of the individual lamp, usage conditions, and the installation environment. It is
recommended that the Replacement Lamp Unit be prepared earlier.
lamp unit regularly. The estimated duration before replacement is 5 000 hours, but the lamp may go off before reaching to
5000 hours, depending on the characteristics of the individual lamp, usage conditions, and the installation environment. It is
recommended that the Replacement Lamp Unit be prepared earlier.
On screen display
REPLACE LAMP
LAMP indicator
On screen display
REPLACE LAMP
LAMP indicator
Over 4 800 hours
The message is displayed for 30 seconds. Pressing
any button on the control panel or remote control
within 30 seconds will clear the message.
any button on the control panel or remote control
within 30 seconds will clear the message.
The indicator lights in red even during the
standby mode.
standby mode.
Over 5 000 hours
The message remains displayed until you press any
button.
button.
If you continue to use the lamp unit after 5 000 hours has elapsed, the lamp turns off automatically after approximately 10
minutes, as it may cause malfunction of the projector.
minutes, as it may cause malfunction of the projector.
Note
• To predict when to replace the lamp, check the lamp runtime displayed in [RUNTIME] in [STATUS].
• 5 000 hours of use is a rough guideline, but is not a guarantee. The lamp runtime differs depending on the setting
of "LAMP POWER" menu.
• 5 000 hours of use is a rough guideline, but is not a guarantee. The lamp runtime differs depending on the setting
of "LAMP POWER" menu.
4. 3. 2. Calculation formula of lamp runtime
The lamp runtime that is displayed in the [STATUS] is real time.
The following conversion is required to calculate the rough estimate for lamp replacement.
The following conversion is required to calculate the rough estimate for lamp replacement.
Formula for lamp replacement time (rough estimate)
="Lamp runtime of [NORMAL]" + "Lamp runtime of [ECO]" x 5/7
4.2.5. Optical block type check
There are 2 types of optical block, named R-type and L-type.
When replacing the optical block, check the printed marker on the flat cable of the G-LCD panel and use the same type of the
optical block. If not used the same type, you will find the color shading or wrong white balance picture on the screen.
When replacing the optical block, check the printed marker on the flat cable of the G-LCD panel and use the same type of the
optical block. If not used the same type, you will find the color shading or wrong white balance picture on the screen.
GL
GR
• GL => Use L-type optical block
• GR => Use R-type optical block
• GR => Use R-type optical block
L-Type optical block
R-Type optical block
G-LCD panel
INF-16
SECTION 1 SERVICE INFORMATION
4. 3. 3. Notes on the replacement of the lamp unit
Warning
Replace the lamp unit after the lamp has cooled (after waiting at least one hour).
The high temperature inside the cover will cause burns.
The high temperature inside the cover will cause burns.
• A Phillips screwdriver is necessary when replacing the lamp unit.
• Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object. Handle with care.
• Do not disassemble or modify the lamp unit.
• When replacing the lamp unit, be sure to hold it by the handle because its surface is pointed and its shape is protruded.
• The lamp may rapture. Replace the lamp unit carefully so the glass fragments of the lamp do not scatter. While attaching the
• Since the luminous lamp is made of glass, it may burst if dropped or hit with a hard object. Handle with care.
• Do not disassemble or modify the lamp unit.
• When replacing the lamp unit, be sure to hold it by the handle because its surface is pointed and its shape is protruded.
• The lamp may rapture. Replace the lamp unit carefully so the glass fragments of the lamp do not scatter. While attaching the
projector to the ceiling, do not work right under the lamp unit or do not conduct work while your face is near the lamp unit.
• The lamp contains mercury. When disposing of used lamp units, contact your local authorities or dealer for correct methods
of disposal.
4. 3. 4. Replacement procedure for lamp unit
Attention
• While attaching the projector to the ceiling, do not work right under
the lamp unit or do not conduct work while your face is near the
lamp unit.
lamp unit.
• Do not remove or loosen the screws other than specified ones
when replacing the lamp unit.
• Make sure to attach the lamp unit and the lamp cover securely.
• If the lamp unit is not installed properly, remove it and then push it
when replacing the lamp unit.
• Make sure to attach the lamp unit and the lamp cover securely.
• If the lamp unit is not installed properly, remove it and then push it
in slowly. Pushing it in quickly or forcibly may break the connector.
1) Turn off the projector and disconnect the power plug from
the power outlet.
• Wait at least 1 hour and make sure the lamp unit and surround-
ing are cool.
2) Use a Phillips screwdriver to loosen the lamp cover fixing
screw (×1) until it turns freely and remove the lamp cover.
• Remove the lamp cover by pulling it slowly toward the direction
of the arrow.
screw (×1) until it turns freely and remove the lamp cover.
• Remove the lamp cover by pulling it slowly toward the direction
of the arrow.
3) Use a Phillips screwdriver to loosen the lamp unit
fixing screws (×3) until they turn freely.
fixing screws (×3) until they turn freely.
4) Hold the used lamp unit by its handles, and pull it gently
from the projector.
from the projector.
5) Insert the new lamp unit in correct direction. Tighten the
lamp unit fixing screws (×3) securely with a Phillips
screwdriver.
• When you experience difficulty in installing the lamp unit, remove
it and try again. If you use force to install the lamp unit,
the connector may be damaged.
lamp unit fixing screws (×3) securely with a Phillips
screwdriver.
• When you experience difficulty in installing the lamp unit, remove
it and try again. If you use force to install the lamp unit,
the connector may be damaged.
6) Attach the lamp cover.
Tighten the lamp cover fixing screw (×1) securely with a
Phillips screwdriver.
• Perform Step 2) in the reverse order to attach the lamp cover.
Tighten the lamp cover fixing screw (×1) securely with a
Phillips screwdriver.
• Perform Step 2) in the reverse order to attach the lamp cover.
Note
• When you replace the lamp unit with new one, the projector resets
the runtime of the lamp unit automatically.
the runtime of the lamp unit automatically.
Lamp cover
Lamp cover
fixing screw
fixing screw
Fig. 1
Lamp
unit fixing
screws
unit fixing
screws
Handles
Fig. 2
INF-17
SECTION 1 SERVICE INFORMATION
4. 3. 5. Air filter maintenance
Perform maintenance of the air filter in the following case.
• The air filter is clogged with dust, causing the filter replacement message to appear on the screen.
• The air filter is clogged with dust, causing the filter replacement message to appear on the screen.
Attention
• Make sure to turn off the power before performing maintenance on the air filter unit.
• Make sure that the projector is stable, and perform the maintenance in a safe place where the unit will not be damaged even
• Make sure that the projector is stable, and perform the maintenance in a safe place where the unit will not be damaged even
if you drop the air filter unit.
4. 3. 6. Replacement procedure for air filter unit
1) Remove the air filter cover. (Fig. 1)
• Open the air filter cover in the direction of the arrow and remove it.
2) Remove the air filter unit. (Fig.2)
• Hold the tab of the air filter unit and pull out in the direction of the arrow.
• After removing the air filter unit, remove foreign objects and dust from the air filter compartment and the projector’s air
• Open the air filter cover in the direction of the arrow and remove it.
2) Remove the air filter unit. (Fig.2)
• Hold the tab of the air filter unit and pull out in the direction of the arrow.
• After removing the air filter unit, remove foreign objects and dust from the air filter compartment and the projector’s air
intake port if there are any.
3) Attach the unused air filter unit to the projector (Fig.3)
• Hold the air filter unit that the tab is in up-left side in the figure, put the right side in the figure first, and press the tab side
• Hold the air filter unit that the tab is in up-left side in the figure, put the right side in the figure first, and press the tab side
until make a click sound.
• Do not press any other part of the air filter unit except the frame during installation.
4) Install the air filter cover.
• Perform Step 1) in “Removing the air filter unit” in the reverse order to close the air filter cover and press it firmly until make
4) Install the air filter cover.
• Perform Step 1) in “Removing the air filter unit” in the reverse order to close the air filter cover and press it firmly until make
a click sound.
• Make sure that the air filter cover is closed tightly.
Air filter cover
Fig. 1
Tab
Air filter unit
Fig. 2
Tab
Air filter unit
Fig. 3
Attention
• Turn off the power before you replace the air filter unit.
• When attaching the air filter unit, make sure that the projector is stable, and work in an environment that is safe, even in the
• When attaching the air filter unit, make sure that the projector is stable, and work in an environment that is safe, even in the
event of the air filter unit dropping.
• Make sure that the air filter unit is properly attached before using the projector. If it is not attached, the projector will suck in
dirt and dust causing a malfunction.
• Do not put anything into the air vents. Doing so may result in malfunction of the projector.
• The air filter unit to be replaced should be an unused product.
• After replacing the air filter, reset the filter counter. Otherwise, “FILTER COUNTER has reached the set time.” will appear on
• The air filter unit to be replaced should be an unused product.
• After replacing the air filter, reset the filter counter. Otherwise, “FILTER COUNTER has reached the set time.” will appear on
screen.
Note
• The replacement cycle of the air filter unit varies greatly depending on the usage environment.
INF-18
SECTION 1 SERVICE INFORMATION
5. Troubleshooting
5. 1. Shutdown system
This projector provides the shutdown function to set into the standby mode immediately for product safety when the projector
has the fan operation error or lamp lightning error.
has the fan operation error or lamp lightning error.
LED indication status
Shutdown detection
Probable cause
OSD warning
Not lighting or flashing
Power supply block
Fuse : Rated 6.3A
Fuse : Rated 6.3A
Blown out of fuse (with another reason)
Disconnecting the connectors
Power board failure
Ballast board failure
Disconnecting the connectors
Power board failure
Ballast board failure
－
Thermal fuse
⇒ Over 113ºC
Blown out of thermal fuse (with another reason)
Check usage environment
Disconnecting the thermal fuse
Check usage environment
Disconnecting the thermal fuse
－
Sub-microprocessor communication error
Sub-microprocessor failure
Disconnection the communication lines
Disconnection the communication lines
－
LAMP LED lights
Lamp runtime
⇒ More than 5000 hours
(Shutdown in 10 minutes)
Lamp runtime is over
“REPLACE LAMP IN ** MIN-
UTES, POWER WILL TURN OFF
AND GO INTO STANDBY
UTES, POWER WILL TURN OFF
AND GO INTO STANDBY
MODE
AUTOMATICALLY.”
LAMP LED brinks
(0.5 seconds cycle)
(0.5 seconds cycle)
Lamp igniting error/Lamp goes off
Lamp cover not installed
Disconnecting the connectors
Lamp error/burning
Ballast block error
Disconnecting the connectors
Lamp error/burning
Ballast block error
－
WARNING LED lights
Temperature exceeds a threshold (*1)
Temperature error
－
Sum of the fan voltage level and filter
clogged level (*2)
clogged level (*2)
Filter clogged
－
WARNING LED blinks
(2 seconds cycle)
(2 seconds cycle)
No fan sense signal
Each fan sense signal level
Each fan sense signal level
⇒ The signal is less than 50% of target
level for more than 5 seconds
Disconnecting the connectors
Fan rotation error/ abnormal
Fan control circuit on the main bard has error.
Fan rotation error/ abnormal
Fan control circuit on the main bard has error.
－
Power supply error
Disconnecting the connectors
Board error
Board error
－
*1 It depends on the lamp mode , fan mode or installed environment.
*2 It depends on the various levels of the filter clogged and fan voltage.
*2 It depends on the various levels of the filter clogged and fan voltage.
The count down number 10 to 1
will be indicated in **.
will be indicated in **.
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