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From: Baron on 20 Jan 2010 15:34
baron Inscribed thus:

> ehsjr Inscribed thus:
>
>> bob haller wrote:
>>> 120 volt in, 35 volts out 1.2 amps I am having a hard time finding a
>>> 35 or 36 volts out transformer.
>>
>> 2 transformers, 18V secondaries, 120V primaries.
>> Primaries in parallel, secondaries in series in phase.
>>
>>
>> # ----------+
>> ---+-------)||( |
>> 120VAC | )||( 18VAC |
>> | )||( |
>> -------+---)||( |
>> | | ----+ +-----
>> | | | 36VAC
>> | | # ----+ +-----
>> +-------)||( |
>> | )||( 18VAC |
>> | )||( |
>> +---)||( |
>> ----------+
>>
>> The transformers in the above example are MPJA #7843 TR
>> http://www.mpja.com/prodinfo.asp?number=7843+TR
>> They cost $5.63 each and are rated at 18V 2.0 amps secondary.
>>
>> The # symbol is for phasing. The secondaries have center
>> taps - don't use them.
>>
>> Ed
>
> Probably no help, but I recall that the old Deskjet 500 printer used a
> transformer with a 38v AC output at about 2amps. I still use one !
> When I get home I'll crawl under the bench and have a look.
>
Sorry I was mistaken ! Its 20v @ 2.4amps. I was sure that I'd seen one
rated 38v.


--
Best Regards:
Baron.
From: bob haller on 20 Jan 2010 18:16
On Jan 20, 3:34�pm, Baron <baron.nos...(a)linuxmaniac.nospam.net> wrote:
> baron Inscribed thus:
>
>
>
>
>
> > ehsjr Inscribed thus:
>
> >> bob haller wrote:
> >>> 120 volt in, 35 volts out 1.2 amps I am having a hard time finding a
> >>> 35 or 36 volts out transformer.
>
> >> 2 transformers, 18V secondaries, 120V primaries.
> >> Primaries in parallel, secondaries in series in phase.
>
> >> � � � � � � � � � � �# ----------+
> >> � � � � ---+-------)||( � � � � �|
> >> � 120VAC � | � � � )||( 18VAC � �|
> >> � � � � � �| � � � )||( � � � � �|
> >> � � � � -------+---)||( � � � � �|
> >> � � � � � �| � | � � � ----+ � � +-----
> >> � � � � � �| � | � � � � � | � � � � � 36VAC
> >> � � � � � �| � | � � # ----+ � � +-----
> >> � � � � � �+-------)||( � � � � �|
> >> � � � � � � � �| � )||( 18VAC � �|
> >> � � � � � � � �| � )||( � � � � �|
> >> � � � � � � � �+---)||( � � � � �|
> >> � � � � � � � � � � � �----------+
>
> >> The transformers in the above example are MPJA #7843 TR
> >>http://www.mpja.com/prodinfo.asp?number=7843+TR
> >> They cost $5.63 each and are rated at 18V 2.0 amps secondary.
>
> >> The # symbol is for phasing. The secondaries have center
> >> taps - don't use them.
>
> >> Ed
>
> > Probably no help, but I recall that the old Deskjet 500 printer used a
> > transformer with a 38v AC output at about 2amps. �I still use one !
> > When I get home I'll crawl under the bench and have a look.
>
> Sorry I was mistaken ! �Its 20v @ 2.4amps. �I was sure that I'd seen one
> rated 38v.
>
> --
> Best Regards:
> � � � � � � � � � � �Baron.- Hide quoted text -
>
> - Show quoted text -

This is used in a GBC pouch laminator, they are still being sold new
for $2500.00 but GBC has discontinued it and all parts support. If it
were the typical cheap 200 buck machine I wouldnt waste my time.

But this is a nice unit in awesome condition. I was told some
transformers have thermal fuses buried in the outer windings, so I
will do a autopsey tonight.

I am in pittsburgh PA My business is the repair of all brands of roll
laminators, including Seal, GBC, Laminex, USI, IDEX, Banner, D&K, and
some others.

GBC a ACCO BRANDS company appears in trouble. They cut pay to all
employees.

Meanwhile their field service raised their per hour rate from 250
bucks for the first hour to 295 bucks. This includes travel but is way
too much for fixing a $1300.00 machine.

I charge a 100 bucks a hour:)

These machines apply plastic to paper think menus. And thanks for the
help!
From: bob haller on 20 Jan 2010 23:54
On Jan 20, 6:16�pm, bob haller <hall...(a)aol.com> wrote:
> On Jan 20, 3:34 pm, Baron <baron.nos...(a)linuxmaniac.nospam.net> wrote:
>
>
>
>
>
> > baron Inscribed thus:
>
> > > ehsjr Inscribed thus:
>
> > >> bob haller wrote:
> > >>> 120 volt in, 35 volts out 1.2 amps I am having a hard time finding a
> > >>> 35 or 36 volts out transformer.
>
> > >> 2 transformers, 18V secondaries, 120V primaries.
> > >> Primaries in parallel, secondaries in series in phase.
>
> > >> # ----------+
> > >> ---+-------)||( |
> > >> 120VAC | )||( 18VAC |
> > >> | )||( |
> > >> -------+---)||( |
> > >> | | ----+ +-----
> > >> | | | 36VAC
> > >> | | # ----+ +-----
> > >> +-------)||( |
> > >> | )||( 18VAC |
> > >> | )||( |
> > >> +---)||( |
> > >> ----------+
>
> > >> The transformers in the above example are MPJA #7843 TR
> > >>http://www.mpja.com/prodinfo.asp?number=7843+TR
> > >> They cost $5.63 each and are rated at 18V 2.0 amps secondary.
>
> > >> The # symbol is for phasing. The secondaries have center
> > >> taps - don't use them.
>
> > >> Ed
>
> > > Probably no help, but I recall that the old Deskjet 500 printer used a
> > > transformer with a 38v AC output at about 2amps. I still use one !
> > > When I get home I'll crawl under the bench and have a look.
>
> > Sorry I was mistaken ! Its 20v @ 2.4amps. I was sure that I'd seen one
> > rated 38v.
>
> > --
> > Best Regards:
> > Baron.- Hide quoted text -
>
> > - Show quoted text -
>
> This is used in a GBC pouch laminator, they are still being sold new
> for $2500.00 but GBC has discontinued it and all parts support. If it
> were the typical cheap 200 buck machine I wouldnt waste my time.
>
> But this is a nice unit in awesome condition. I was told some
> transformers have thermal fuses buried in the outer windings, so I
> will do a autopsey tonight.
>
> I am in pittsburgh PA My business is the repair of all brands of roll
> laminators, including Seal, GBC, Laminex, USI, IDEX, Banner, D&K, and
> some others.
>
> GBC a ACCO BRANDS company appears in trouble. They cut pay to all
> employees.
>
> Meanwhile their field service raised their per hour rate from 250
> bucks for the first hour to 295 bucks. This includes travel but is way
> too much for fixing a $1300.00 machine.
>
> I charge a 100 bucks a hour:)
>
> These machines apply plastic to paper think menus. And thanks for the
> help!- Hide quoted text -
>
> - Show quoted text -

Thermal fuse was blown, it was on the outside of the input winding.
Hopefully that will fix the machine. Epoxy will put it back together
again.

How sad to toss a transformer for the lack of a fuse:(
From: Paul E. Schoen on 21 Jan 2010 13:35

"bob haller" <hallerb(a)aol.com> wrote in message
news:a79f2299-3770-4101-9eff-ff1abe3356c8(a)h2g2000yqj.googlegroups.com...

Thermal fuse was blown, it was on the outside of the input winding.
Hopefully that will fix the machine. Epoxy will put it back together
again.

How sad to toss a transformer for the lack of a fuse:(

==========================================================================

Still it is important to determine what might have blown the fuse. Most
thermal fuses are rated high enough that when they open, the temperature is
high enough to have caused damage to the insulation. It would be prudent to
replace it with another thermal fuse. To make sure there is no damage,
check the primary current under no-load conditions, and also perform a
hipot check between windings. Then operate the unit under normal conditions
and check for excess current draw or overheating.

Paul


From: John Fields on 21 Jan 2010 14:16
On Wed, 20 Jan 2010 20:54:01 -0800 (PST), bob haller <hallerb(a)aol.com>
wrote:


>Thermal fuse was blown, it was on the outside of the input winding.
>Hopefully that will fix the machine. Epoxy will put it back together
>again.
>
>How sad to toss a transformer for the lack of a fuse:(

---
Did you replace the fuse?

JF
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