disconnect crt board from tube and measure g2 voltage at board while adjusting focus if it varies bad g2/focus block if it doesn't, bad crt Robert tvservice@xxxxxxxxxxxxx H & H Electronics Inc ----- Original Message ----- From: "pete" <tvtech@xxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Thursday, December 30, 2004 8:10 PM Subject: [TechAssist] hitachi projo ap84 chassis model 60sbx78b blue retrace > Hi everybody > I have a ap84 chassis. The original problem was dead. found f994 open and cap 707 blown up. replaced parts unit now turns on but the picture is greenish. The blue is very flaky. If I turn up the screen just a hair I get retrace lines,I cannot get good grey scale. I dont have enough control of the blue gun. If I turn up the focus control it acts like the screen control. How can I know wheather I have a bad screen focus control, or a bad crt? Has anybody seen this before. Any help will be greatly appreciated I dont have a tube checker > > Pete > Perdomo Tv Inc Since 1972 > Miami.Fl > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > http://www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: http://www.freelists.org/archives/techassist/