66CS-D8H (serv.man22). Counter measure for doming at high beam current - Sharp TV Technical Bulletin (repair manual)

66cs-d8h (serv.man22) technical bulletin
Model
66CS-D8H (serv.man22)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
20.31 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Counter measure for doming at high beam current
File
66cs-d8h-sm22.pdf
Date

Read Sharp 66CS-D8H (serv.man22) Technical Bulletin online

 
Sharp Electronics (UK) Limited 
Reference JC280699/1
   
Revision  2 
 
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units   
CTV990701 
Month of Issue: July 1999 
        Classification:         White      
TELEVISION TECHNICAL BULLETIN 
     Page 1 of 1 
 
 
MODELS
  
59CSD8H 
66CSD8H 
 
 
 
 
 
 
 
 
 
SYMPTOM 
Doming caused by high beam current in limited areas of the CRT shadowmask 
causing short term purity errors.          
 
 
 
ACTION 
Reduce the factory pre-sets for brightness, saturation and contrast to a point at which 
doming does not appear.  
 
This is achieved by changing the following NVM locations  
 
 
Function  
NVM Page 
NVM Position  Factory Default 
Change To 
Brightness   
00 
21 
28 
24 
Saturation   
00 
22 
32 
2D 
Contrast     
00 
23 
50 
4A 
 
 
To set these NVM positions, enter the test mode as described in the service manual, 
then adjust to the values given above (these are only given for guidance and may be 
changed as necessary).  To store the values, remember to press the standby button 
on the remote control while at that location.  
 
Note: 
It is important that after carrying out the above changes, the user picture set up menu 
is entered and the normalised button is pressed.  Turn the reciever off, then back on 
again using the mains button to ensure that the settings are memorised.  
 
 

Download Sharp 66CS-D8H (serv.man22) Technical Bulletin

Here you can read online and download Sharp 66CS-D8H (serv.man22) Technical Bulletin in PDF. 66CS-D8H (serv.man22) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 66CS-D8H (serv.man22) CTR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.