[TechAssist] Re: Quasar Console Model TU9818CP. Vertical circuit, (open) main fuse.
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 4 Apr 2005 00:46:57 -0500
I actually had a Quasar with no vertical, after replacing the IC and caps it
still had no vertical.....but when I unplugged the CRT board from the CRT,
suddenly the vertical output signal was present. Next test was the "cold"
Crt test.....reattached the Crt board while monitoring the Vert Signal, when
cold the vertical was present until the heaters warmed up and voila....the
vert signal dropped out. Don't know why, but when the CRTs die they shut
down the vertical output on this model.
So be careful about the vertical IC you replaced, maybe disconnect the Crt
board and see what happens.
Damon Brunger
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "Robinson Electronics" <RobinsonElectronics@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, April 03, 2005 8:50 PM
Subject: [TechAssist] Quasar Console Model TU9818CP. Vertical circuit,
(open) main fuse.
> Does anyone have a pdf. manual for this model, to share?
> I never worked on this old of a set, great condition.
> I have one here with a perfect cabnet, trying to repair.
> This set had a open main fuse, checked the circuit board, could not find
any faults, except some cold solder connections. Originally had the
vertical AN5521 ic replaced a few years back, thought it may be bad (did not
check shorted) so I replaced it with, I thought was a good used one, when I
replaced it and another fuse. Set powered on with h.v., but no video or
sound. When G2 turned up- had a line across the middle.
> Looks like I replaced it with a bad vert ic? But not sure about the no
sound, unless video & sound muted?
> I put the original IC back in it, and when powered on blew the fuse out.
> So it looks like I do have a bad IC. (Got some new ones ordered).
> Can any of you Tech. familiar with this model help me on this repair?
> Or a service manual to share?
>
> Rbinson Electronics
> 1075 Sweeten Creek Road
> Asheville, NC 28803
> Ph./Fax. 828 274-3787
> Toll Free. 1-888 ROBELECT
> www.robinsonelectronics.com
> www.robelect.com
> Mailto: RobinsonElectronics@xxxxxxxxxxx
>
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