[TechAssist] Re: Quasar TT9909CE
- From: "Webster TV" <webstertv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 26 Feb 2002 16:59:30 -0600
Joe,
The set you are working on is in the overvoltage protect mode, your B+
voltage should be 129V right on fuse F002. Check Q801 (SCR), make sure it's
not shorted.There's also four other transisters in the power supply circuit
Q802, Q803, Q804, Q805 you should check. If everything checks OK, I'd run
the set off a variac and cut down your AC voltage, till you get the right B+
voltage and go from there, beings you have the service manual.
Good Luck!
Dan Webster
Webster's TV
Shullsburg, Wi.
----- Original Message -----
From: Joe Prokup <pro501@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 26, 2002 8:13 AM
Subject: [TechAssist] Quasar TT9909CE
>
> Just started on an older Quasar Model TT9909CE Chassis ANEDC124.
> I'm using Sam's 2326 it appears "close" to the same power supply.
> Set turns on,horizontal frequency off.Testing found B+ at 169VDC would not
> go any lower.
> B+ adjustment is turned down all the way.
> Just did some quick checks on Q501 (Horiz Drive)checked the 12V 31.4V
> Any thoughts on this one?
> Joe Prokup
> PRO-ELECTRONICS
> Spring Valley, IL
> PH 815-663-3005 FAX 815-371-1234
> pro501@xxxxxxxx
>
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