DOWNLOAD Panasonic PT-LW375 / PT-LW335 / PT-LB425 / PT-LB385 / PT-LB355 / PT-LB305 (serv.man3) Service Manual ↓ Size: 20.3 MB | Pages: 70 in PDF or view online for FREE

Model
PT-LW375 PT-LW335 PT-LB425 PT-LB385 PT-LB355 PT-LB305 (serv.man3)
Pages
70
Size
20.3 MB
Type
PDF
Document
Service Manual
Brand
Device
Projector / LCD PROJECTOR
File
pt-lw375-pt-lw335-pt-lb425-pt-lb385-pt-lb355-pt-lb.pdf
Date

Panasonic PT-LW375 / PT-LW335 / PT-LB425 / PT-LB385 / PT-LB355 / PT-LB305 (serv.man3) Service Manual ▷ View online

10
PREFACE
<LW375/LW335/LB425/LB385/LB355/LB305>
 
r
Dimensions
ENGLISH - 115
Dimensions
Unit : mm (inch)
335 (13-3/16")
87 (3-7/16")
250 (9-27/32")
252 (9-29/32")
61 (2-13/32")
9 (11/32")
96 (3-25/32")
55 (2-5/32")
69 (2-23/32")
168 (6-5/8")
 
Actual dimension may differ by product.
Chapter 7   Appendix - Dimensions
SECTION
1
INF-1
 (2018-12)
SECTION 1 SERVICE INFORMATION
CONTENTS
1. Circuits Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-2
1. 1. Thermal switch 
1. 2. Lamp cover switch
1. 3. Fuse (F2003)
2. Maintenance/Replacement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-3
2. 1. Maintenance 
2. 2. Replacing the Unit
2. 3. How to check the lamp runtime
2. 4. Cleaning
3. Notes on service  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-10
3. 1. Before service operation
3. 2. Service
3. 3. Security functions
3. 4. Standby mode
3. 5. How to change the baud rate of serial communication port
4. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-14
4. 1. LED indicators
4. 2. Shutdown system
4. 3. Error log
4. 4. Troubleshooting chart
4. 5. I/O port functions
INF-2
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
1. Circuits Protection
This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the projector, it will 
automatically turn off by operating one of the following protection circuits. 
1. 1. Thermal switch 
There is a thermal switch inside of the projector to detect the inter-
nal temperature rising abnormally. When the internal temperature 
around lamp reaches near 120°C , the thermal switch will open to 
cut off the power supply to the lamp power circuit.
The thermal switch is not reset to normal automatically even if the 
internal temperature becomes normal. Please reset the thermal 
switch following to the procedure below.
How to reset the thermal switch
1. Remove the cabinet top case.
2. Press the reset button on the thermal switch. 
Caution:
Before press the reset button, disconnect the AC cord from the 
projector.
1. 2. Lamp cover switch
The lamp cover switch cuts off the drive signal to the lamp circuit 
when the lamp cover is removed or not closed completely. After open-
ing the lamp cover for replacing the lamp unit, place the lamp cover 
correctly otherwise the projector cannot turn on. 
1. 3. Fuse (F2003)
A fuse is located inside of the projector. When the <ON (G)/STANDBY (R)> indicator is not lighting, the fuse may be opened. 
Please check the fuse as following steps.
The fuse should be used with the following type;
Fuse Part No.: K5E632YY0007
TYPE VBS UBM 6.3A 250V (PF) FUSE
CONQUER. TYPE VBS UBM
How to replace the fuse
1.  The fuse is placed on the filter board. Remove the cabinet
    top according to the SECTION 2 "Mechanical Disassembly". 
2.  Take the fuse off from the fuse holder, then replace the new
    one with the specified type. 
 
Fuse
(F2003)
Thermal fuse 
Lamp cover switch
INF-3
SECTION 1 SERVICE INFORMATION
<LW375/LW335/LB425/LB385/LB355/LB305>
2. Maintenance/Replacement
Before performing maintenance/replacement
 
f
When you perform maintenance or replacement of the parts, make sure to turn off the power and disconnect the power plug 
from the wall outlet.
 
f
Be sure to observe the procedure  "Powering Off the Projector" of Operating Instructions when performing power supply 
operation.
2. 1. Maintenance 
Outer Case
Wipe off dirt and dust using a soft dry cloth.
 
f
If the dirt is persistent, soak the cloth with water and wring it thoroughly before wiping. Dry off the projector with a dry cloth.
 
f
Do not use benzene, thinner, or rubbing alcohol, other solvents, household cleaners. Using them may cause deterioration of 
the outer case.
 
f
When using chemical treated dusters, follow its instruction.
Front glass surface of the lens
Wipe off the dirt and dust off the front surface of the lens with soft clean cloth.
 
f
Do not use a cloth that has an abrasive surface or a cloth that is moist, oily, or covered with dust.
 
f
Do not use excessive force when wiping the lens as it is fragile.
 
f
Do not use benzene, thinner or rubbing alcohol, other solvents or household cleaners. Using them may cause deterioration of 
the lens. 
Attention
 
f
The lens may be damaged if you hit with a hard object or wipe with excessive force. Please handle with care.
Air filter unit
Perform maintenance of the air filter in the following cases.
 
f
If the time which is set in [Expand] menu → [Filter counter] is elapsed, the filter warning icon 
 will be dis-
played. 
 
f
If the air filter is clogged with dust, the power indicator <ON(G)/STANDBY(R)> blinks in orange, or the filter warning icon 
 will be displayed and after a while the projector is turned off automatically. 
Attention
 
f
Make sure to turn off the power before performing maintenance on the air filter unit.
 
f
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 
Removing the air filter unit
Air filter cover
Tabs
Fig.1
Fig.2
Hook
Hook
Air filter cover
Air filter unit
1)  Remove the air filter cover. (Fig.1)
 
f
Pull out the air filter cover from the hook of the projector while slightly pushing upward the tabs of the air filter cover and 
open it in the direction of the arrow in figure.
2)  Remove the air filter unit.
 
f
The air filter unit is fixed by the three hooks. Grasp the fibre of the air filter unit near to the cover side with one hook and 
then pull the air filter unit out from the air filter cover as arrow direction shown. (Fig.2)
 
f
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.
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