Found a Sony Trinitron KV-1212

[Dreamsbeard]

Good to know that! But I was really saying is : I heard that some sony need OEM parts in order to work, no 3rd part stuff will do and that they are hard to diagnose (over engeneering I guess)

[zeno]

Originally Posted by Dreamsbeard

Good to know that! But I was really saying is : I heard that some sony need OEM parts in order to work, no 3rd part stuff will do and that they are hard to diagnose (over engeneering I guess)

The ones to avoid use the SG613 or SG603 gate controlled switch for
a hoz output, few shops would get near one. They were sold apx
'72-'77. Before that not to bad. After that about as easy as most sets.

73 Zeno

[rca2000]

ANY Sony that uses a GCS is something to STAY AWAY from!! Unless you are into masochism...I do NOT think a KV-1212 does....but may be wrong. If you have the SLIGHTEST problem with horiz. drive..kiss the GCS good-bye INSTANTLY !!

[zeno]

Originally Posted by rca2000

ANY Sony that uses a GCS is something to STAY AWAY from!! Unless you are into masochism...I do NOT think a KV-1212 does....but may be wrong. If you have the SLIGHTEST problem with horiz. drive..kiss the GCS good-bye INSTANTLY !!

On the same page.
Sony was a super arrogant company in the 70's. Independant parts
distributors were yet to come. If you called them & managed to get
the right person they treated you like dog doot. The shops that did them kept mum on how to deal with them. They were getting $120 to open one, a LOT of beer & smokes at the time. Most of the arrogance went away in the 80's, the parts dept in KC were great & the tech help became friendly. Of course it helped to be an ASC & true franchised dealer !
Anyhows avoid the bad ones & have a fist full of electrolytics for the good ones. Nuf sed.

73 Zeno

[dieseljeep]

Originally Posted by zeno

The ones to avoid use the SG613 or SG603 gate controlled switch for
a hoz output, few shops would get near one. They were sold apx
'72-'77. Before that not to bad. After that about as easy as most sets.

73 Zeno

In a Sony of that vintage, I replaced the damper diode and the GCS, with ECG replacements. The repair lasted about an hour.
The only parts that would last were genuine Sony replacements.

[zeno]

Originally Posted by dieseljeep

In a Sony of that vintage, I replaced the damper diode and the GCS, with ECG replacements. The repair lasted about an hour.
The only parts that would last were genuine Sony replacements.

Yup the old top-hat dampers used to open intermitantly. Change them
all even if I was working on another stage. OEM only of course.

73 Zeno

[DaveWM]

so if I own of these I should get a couple spare transistors? I can keep I eye open for them.

[rca2000]

Can't you use 2SC 1308's---those should work fine...unless Sony did the ol' "specific ckt" that you MUST use OEM's for....

[DaveWM]

found its way to soggy central Florida today, arrived in good shape, nice pic but has the same pin cushion issue I found on the other. bad cap located, pulled tested bad, but of course I am out of 4.7 uf argh...

video soon.

Thanks again Tim.