Sony TV9-306ub frame slip - UK Vintage Radio Repair and Restoration Discussion Forum

tvden · 8th Jun 2006, 5:00 pm

Hi all

A little help sought. I bought a little Sony 405/625 Tv9-306 UB at Harpenden, Trader sheet 1803.
On trying it I find it has frame slip !!
Frame is only running at 50%; can't get frame lock, as I have two complete pics on the screen with a black band in the middle, and this then has a bright band in the middle which looks like a scope trace.
As I know next to nothing about transistor sets I wonder if anyone has any ideas?
I would add that I have not yet looked inside,
many thanks
Den

tvden · 8th Jun 2006, 5:57 pm

Just to add that it will lock on the two pics for a few mins and then starts running again, the sync is ok.

den

Steve_P · 8th Jun 2006, 10:25 pm

Oh God, another one of these. People seem to love them or hate them, and I'm in the second category. Oh well....

The transistor on the Vertical Osc is probably OK. It's VTR102. The Vertical Hold control is VR5, and it has two resistors, one on each side. R702 is between the control and Earth and it should be 6.8k. The other one is between the other pin of the control and +Vs. This should be 2.7k.

The Vs should be OK.

There's also a Capacitor across the Wiper of the Control and Vs.

Your problem should be here.

Good Luck. You'll need it to get the thing apart!!!

Steve P

tvden · 9th Jun 2006, 8:09 am

Hi Steve
Many thanks for your explicit information on the fault.
Yes, I am not looking forward to taking it apart, but needs must.
I must admit I rather like these little Sonys, I have the 9-990 as well and a Perdio Portarama. These are my only B/W trani sets

Many thanks for your help
Den

8th Jun 2006, 5:00 pm	#1
tvden Retired Dormant Member Join Date: Oct 2003 Location: Halesworth, Suffolk, UK. Posts: 413	Sony TV9-306ub frame slip Hi all A little help sought. I bought a little Sony 405/625 Tv9-306 UB at Harpenden, Trader sheet 1803. On trying it I find it has frame slip !! Frame is only running at 50%; can't get frame lock, as I have two complete pics on the screen with a black band in the middle, and this then has a bright band in the middle which looks like a scope trace. As I know next to nothing about transistor sets I wonder if anyone has any ideas? I would add that I have not yet looked inside, many thanks Den

8th Jun 2006, 5:57 pm	#2
tvden Retired Dormant Member Join Date: Oct 2003 Location: Halesworth, Suffolk, UK. Posts: 413	Re: Sony TV9-306ub frame slip Just to add that it will lock on the two pics for a few mins and then starts running again, the sync is ok. den

8th Jun 2006, 10:25 pm	#3
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Sony TV9-306ub frame slip Oh God, another one of these. People seem to love them or hate them, and I'm in the second category. Oh well.... The transistor on the Vertical Osc is probably OK. It's VTR102. The Vertical Hold control is VR5, and it has two resistors, one on each side. R702 is between the control and Earth and it should be 6.8k. The other one is between the other pin of the control and +Vs. This should be 2.7k. The Vs should be OK. There's also a Capacitor across the Wiper of the Control and Vs. Your problem should be here. Good Luck. You'll need it to get the thing apart!!! Steve P __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

9th Jun 2006, 8:09 am	#4
tvden Retired Dormant Member Join Date: Oct 2003 Location: Halesworth, Suffolk, UK. Posts: 413	Re: Sony TV9-306ub frame slip Hi Steve Many thanks for your explicit information on the fault. Yes, I am not looking forward to taking it apart, but needs must. I must admit I rather like these little Sonys, I have the 9-990 as well and a Perdio Portarama. These are my only B/W trani sets Many thanks for your help Den