DOWNLOAD Panasonic PT-LW373 / PT-LW333 / PT-LB423 / PT-LB383 / PT-LB353 / PT-LB303 (serv.man3) Service Manual ↓ Size: 20.74 MB | Pages: 70 in PDF or view online for FREE

Model
PT-LW373 PT-LW333 PT-LB423 PT-LB383 PT-LB353 PT-LB303 (serv.man3)
Pages
70
Size
20.74 MB
Type
PDF
Document
Service Manual
Brand
Device
Projector / LCD PROJECTOR
File
pt-lw373-pt-lw333-pt-lb423-pt-lb383-pt-lb353-pt-lb.pdf
Date

Panasonic PT-LW373 / PT-LW333 / PT-LB423 / PT-LB383 / PT-LB353 / PT-LB303 (serv.man3) Service Manual ▷ View online

ADJ-3
SECTION 3 ADJUSTMENTS
<LW373/LW333/LB423/LB383/LB353/LB303>
2. Optical Adjustment
Before taking optical adjustments, remove the cabinet top following the "Mechanical Disassembly". 
Tools: a  hex wrench and a slot screwdriver. 
Note:  Do not disconnect connectors on the main board, because the projector cannot turn on due to operate the  
          power failure protection. 
2. 1. Optical center adjustment
[Before]
Input a 100% white signal. 
1. Adjust the condenser lens (OUT) to obtain a completely white screen. 
  1) In case the shadow appears on the left or right edge of the   
      screen. Loosen 1 screw A and move the condenser lens unit  
      right or left to disappear the shadow on the screen. (Fig2-1)
  2) In case the shadow appears on the top or bottom edge of the 
      screen. Loosen 2 screws B and move the condenser lens unit 
      upper or lower to disappear the shadow on the screen. (Fig.2-2)
2. Tighten screws A and B to fix the condenser lens unit. 
Fig. 2-2 
Completely 
white screen
Completely 
white screen
Fig. 2-1 
a
b
y
x
x
B
B
y
a
A
b
ADJ-4
SECTION 3 ADJUSTMENTS
<LW373/LW333/LB423/LB383/LB353/LB303>
3. Electrical adjustment
3. 1. Service adjustment menu operation
Enter service mode.
To enter the "Service Mode", press and hold the MENU button and  button on the projector for more than 3 seconds or press 
and hold the MENU button on the remote control for more than 20 seconds.
The service menu appears on the screen as follows. 
To adjust service data
1. Select the adjusting items "Group", "No." or "Data" by pressing the MENU button repeatedly. The red cursor will 
    move to show the selected item.
2. To change the value of selected item, press the  or  button repeatedly. Refer to the "Service adjustment 
    data table" for further information. 
Exit service mode.
Press 
 to exit the service mode. 
Service Mode       PANASONIC
Input 
     Computer 1 
Image            Dynamic
Group 
No. 
Data
  200              
1
             
0
 Ver.
             
  1.00             XXXXX
 
Group No.
F/W version
Item No.
Data value
ADJ-5
SECTION 3 ADJUSTMENTS
<LW373/LW333/LB423/LB383/LB353/LB303>
*  Before setting, check which type of Optical block is used by 
  the projector according to the "Optical block removal" 
  chapter in Optical Parts Disassembly.
1. Enter the service mode.
2. Optical block type check
Select Group 290 and No. 0 to check the following values;
  Data "0" 
:  L-type Optical block
  Data "20"  
:  R-type Optical block
  If the installed type of Optical block is different from the  
  set display mode, perform the following procedures.
3. Optical block type mode setting
    Select Group 290 and No. 1, set the Data value between 
10 and 0 or 20 according to the Optical block type. When     
   the value reaches 0 or 20, it will return to 10. 
3. 2. Circuit adjustment
CAUTION:  The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following 
 
 
 
  adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance 
 
 
 
  and product safety. Before adjustment, please turn on the projector for more than ten minutes. 
WARNING:  USE UV RADIATION EYE AND SKIN PROTECTION DURING SERVICING
.
CAUTION:  To prevent suffer of UV radiation, those adjustments must 
be completed within 25 minutes.
1. Fan voltage adjustment
    Equipment 
Digital voltmeter
1. Enter the service mode.
2. Connect the digital voltmeter to the test points listed 
    below.
3. Select Group no. 250, No. 0 and change the Data 
    value to adjust the reading of voltmeter to be 
    specified value.
4. Adjust the remaining adjustments of the No. 1 to 5 
    listed below.
 
Group-No. 
Test Points  
Adjustment value
  250  -  0 
FAN-A1  
4.0 ±0.1Vdc
  250  -  1 
FAN-A1  
12.5 ±0.1Vdc
  250  -  2 
FAN-B1  
4.0 ±0.1Vdc
  250  -  3 
FAN-B1  
12.5 ±0.1Vdc
  250  -  4 
FAN-C1  
4.0 ±0.1Vdc
  250  -  5 
FAN-C1  
12.5 ±0.1Vdc
 
2. Panel type check and setting
3. Flicker adjustment
  Input signal            No signal
1.  Enter the service mode.
2.   
Select Group No.30 and change Data value as follows.  
  Obtain the minimum screen flickering value by adjusting   
     the value. 
 
Group-No.      Adjustment
 
30 - 3 
Red flickering
 
30 - 4 
Green flickering 
 
30 - 5 
Blue flickering
4. Keystone offset correction 
     Input signal No signal
1.   
Put the projector on a horizontal place with the adjust-
able feet being minimum range and then enter the
      service mode. 
2.  Select Group 102, No.3 and set data value from 0 to 5. 
3.   By pressing the INPUT/ENTER button, the Keystone 
  Offset adjustment will start. 
4.    When it has completed, the "OK" message will appear 
on the screen. 
5.    By pressing any button on the projector or the remote  
  control, the "OK" message will disappear.  
  (Data value of Group 102, No.3 will be back to 0 for
      initial value.)
ADJ-6
SECTION 3 ADJUSTMENTS
<LW373/LW333/LB423/LB383/LB353/LB303>
3. 3. Test points and locations
MAIN board
FAN_B1
FAN_A1
FAN_C1
(Only for PT-LW373, PT-LW333, PT-LB423, PT-LB383 and PT-LB353)
(Only for PT-LB303)
FAN_B1
FAN_A1
FAN_C1
IC3501
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