sony g420 issue

[RichSorr]

hey all, I gotta Sony G420 19" that has gone very bright. Sometimes right from the start, others it will look okay, then slowly fade up.

numbers on the board are 250VTG. 3AH F601

any input would be appreciated. thanks

[qrz]

schematic zip file here  www.eserviceinfo.com/downloadsm/7719/Sony_CPD-G420.html

if time allows , will have a look later today . perhaps can then provide some suggestions.

qrz

[RichSorr]

bah, I can't open the file for some reason

[qrz]

it is in a "DJVU" file.  i dl'ed a scan conv. and i can't open it either .

some files on eservice are russian in origin . so,    will see if can find it elsewhere .....

qrz

[RichSorr]

anyone got any ideas?

[qrz]

4 parts at   http://fileshare.eshop.bg/index.php?what=search2&searchstring=CPD-420GS-420GST


on the "neck board",  check R048 ( 2.2meg)  and R053 ( 22meg ) Q001, ic005

check voltage sources at cn305 pin 1(180v) pin 3 (80v) pin7 (12v)

on D board , check R918 (2.2ohm) and d906     

due to circuit complexity , servicing of this model may be beyond the abilities of most amateurs , and perhaps a challenge to some professionals.

pm for more

qrz