Re: For "big dog" and others-some known flyback pinouts!

From: big dog <catfishh_at_bellsouth.net>
Date: Wed Aug 08 2001 - 05:06:31 EDT

Thanks Mr. Vector:>

Mark Capps

Aaron Howald wrote:

> I assume NO responsibilty for this info, although I believe it to be
> correct.
>
> OK. First, ALL of these have an isolated drive winding,
> most of these are in hot-ground sets.
> BTW, almost all flybacks have an isolated driver winding, and in many
> sets, the flyback IS the isolation transformer.
> All of these have the standard divider built in with the 2 controls,
> with foucus+g-2 outputs.
> The voltages noted are when operated in a "normal" TV.
> B+ is usually 120-130 Volts IN to the fly back, all other voltages come OUT
> of it, and need a hi-speed diode+a cap to GND to get the voltage.
>
> The pins are NOT marked on the transformer, but they were
> helpfully marked on the boards they were taken off of!
> They are the pin-outs reffered to here.
> All are given Clockwise around, looking at the bottom-held
> as the letter "C", pins start at the lower right...
>
> If you ONLY want HV, you only need the collector and B+ pins,
> with maybe the +180 ouput used for the video out transistors.
>
> Emerson #3225006
> Collector (to horiz out)
> B+ (usually 110 to 130 volts)
> +25V (usually to vertical deflection)
> +14V (misc supplies)
> Gnd
> +180V (usually boosted off of the B+ pin, beware!)
> this winding just adds 60-70 volts to the B+
> ABL (usually the ground for the HV 30KV,used in many sets for HV
> current monitoring)
> Gnd
> AFC (small winding, often used to sync horiz osc)
> Heater (power for pix tube fil)
> There is also a small tab next to the "ABL" pin, was grounded in the set...
> seems to be the ground for the hi-voltage!
>
> Most flybacks are VERY similar to this, just slightly different volt outs
> for tube sizes, etc...
>
> Emerson #3225003 (can get this for $25)
> B+, +180, AFC, Collector, +25V, +14V, ABL, Heater, GND, GND
> This one has a small aux winding on the other side used to reg the power
> supply, called the "scr coil"
>
> Emerson 3220030
> Collector,B+,+25V,+14V,GND,+180V,ABL,GND,AFC,Heater(tube)
>
> Emerson 3220018 (3220019 may be VERY similar,slightly higher HV?)
> B+,+180V,AFC,Collector,+25V,open pin,ABL,GND,Heater,+14V
> This fly has the "scr" coil too.
>
> Daewoo DCF-2077
> Collector,open pin,AFC,B+,+17V,ABL,+25V,GND,+175V(boosted),heater
>
> Goldstar 154-1770
> Collector,+180V,B+,Gnd,+24V,+12V,Gnd,ABL,Heater,+22V
>
> You should have no problem getting these from a TV parts distributor...
>
> One thing of note-the G2 and the foucus outputs are scaled to an output
> HV of 25-30KV, since vector monitors use less, the foucus output
> may be too low to use, even turned up all the way.
> The +180V boost will also be less "boosted" as well.
>
> good luck!
>
> Aaron Howald (just call we mister vector)
> ahowald@w-link.net
>
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Received on Wed Aug 8 02:08:39 2001

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