|
|
|
|
|
#1
11-17-2021, 11:29 AM
|
||||
|
||||
|
Unfortunately the flyback transformer has gone bad I turned on the set and it ran for couple of seconds then toons of smoke came out of the flyback transformer. I have found a replacement and will try and fix the TV.
Last edited by liammc00; 11-23-2021 at 08:33 AM. 
|
|
#2
11-23-2021, 10:01 PM
|
||||
|
||||
|
From what I recollect Sony flybacks were pretty reliable but occasionally they would fail. The HV block that had red epoxy would crack and then arc to ground are what seemed to fail more often than a flyback. That set looks like it would be new enough to have HV shutdown circuitry on it.
__________________
Sony Trinitron is my favorite brand. My wish list: Sony KV-7010U Sony KV-1220U
|
|
#3
11-25-2021, 10:16 AM
|
||||
|
||||
|
This is what happened after I fixed a mistake in the power supply that I made. I plugged the set in and turned TV on the TV ran for a couple of seconds then the casting on side of the flyback cracked an smoke came pouring out of it I immediately unpuged the set. Once it stoped smoking I saw were the flyback blew brown gunck out. I did check bottom of the flyback and insulation has zreo cracks. I have replaced the flyback and set powered on and is kinda working I get a picture but it's very bright and the britness control has no effect nore dose contrast(picture control) on the picture. When the tube is warming up you can see the on screen display but once at full britness you can't. I believe the screen control needs to be adjusted but I'm not sure. I have never worked on Sony before nore have I ever replaced a flyback. I also messed up the tunner some how. I get no reception at all but I believe it was a mistake I made I think I have fixed it but I will no once I test the set.
Last edited by liammc00; 11-26-2021 at 07:56 AM.
|
|
#4
11-25-2021, 06:48 PM
|
||||
|
||||
|
G-2 usually abt 450 volts.If its high it gives your problem.
If G-2 control is on the FBT check for an unsoldered pin under it. If G-2 control on CRT socket check the high ohm resistors (over 1 meg ) on socket. If G-2 OK check the 3 cathodes of CRT ( KR, KB & KG) Should be in range of abt 120-140 VDC. If very low thats the problem. Report back. 73 Zeno  LFOD !
|
|
#5
11-25-2021, 08:23 PM
|
||||
|
||||
|
I turned on the tv after fixing the tuner and it is hooked up to a VCR so you get a blue screen. Ok here is the result the I get a blue picture from the VCR and the TV's screen display. The picture is washed out and the britness control has very little affect. I would check the G-2 voltage but I'm afraid I might blow up my meter I only have a multi meter and it's max is 600v. The G-2 can be 375-900v
Last edited by liammc00; 11-26-2021 at 10:33 PM. Reason: removed attachments to free up space so I can more pixs
|
| Audiokarma |
|
#7
11-26-2021, 10:31 PM
|
||||
|
||||
|
Got the TV working and now I'm going to joy one of my favorite tv shows which is Talespin. Thanks for all that help
Last edited by liammc00; 12-10-2021 at 01:54 PM. Reason: fixed spelling mistakes
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
