Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: RichSorr on March 28, 2008, 10:12:23 pm

Title: sony g420 issue
Post by: RichSorr on March 28, 2008, 10:12:23 pm

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

Title: Re: sony g420 issue
Post by: qrz on March 29, 2008, 10:49:32 am

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

Title: Re: sony g420 issue
Post by: RichSorr on March 29, 2008, 03:40:33 pm

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

Title: Re: sony g420 issue
Post by: qrz on March 29, 2008, 05:38:08 pm

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

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

qrz

Title: Re: sony g420 issue
Post by: RichSorr on April 02, 2008, 11:52:09 pm

anyone got any ideas?

Title: Re: sony g420 issue
Post by: qrz on April 03, 2008, 04:56:48 pm

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