[TechAssist] Re: Chipper check need schematic UPDATE
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 11 May 2004 14:45:07 -0400
I ordered the transformer. The waveform had a lot of ringing in it and I
took it out and it didn't ring on my ringer tester so I guess it's bad. Put
5V in with power supply and it stayed up so will post.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, May 10, 2004 4:44 PM
Subject: [TechAssist] Re: Chipper check need schematic
> Al, if you lift the 100 ohm resistor it should show 9 volts. The Zener
diode
> is on the same line. It is on the isolated side of the transformer. I just
> thought your zener could be shorted. I put mine back together. Either
some
> thing is pulling down voltage or the small isolating transformer could be
> open? If Sencore is taking care of the CC maybe they would help, always
> helped with other test equipment.
> Bruce.
>
>
>
> ----- Original Message -----
> From: "al m" <ampm@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, May 10, 2004 4:31 PM
> Subject: [TechAssist] Re: Chipper check need schematic
>
>
> > No I tried lifting all parts I still only get 1.4V. Is yours plugged on
to
> > computer? If I'm supposed to have 5V on the secondary then I Got a
problem
> > somewhere. I checked this at 4:30 but the time in says 3:41. So Your
> saying
> > there should be 9V on secondary with zener removed?Ok then I got a
problem
> > somewhere.
> > Al Marquardt
> > ampm@xxxxxxx
> > Al Marquardt Electronic Repair
> > 206 W Main
> > Girardville Pa. 17935
> > ----- Original Message -----
> > From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, May 10, 2004 3:31 PM
> > Subject: [TechAssist] Re: Chipper check need schematic
> >
> >
> > > Al, I don't have a print maybe you could send me one. I did some
checks
> on
> > > mine. Primary side looks like your 12 volt input from external power
> > source.
> > > This goes through a small transformer inside .The 5 volts looks like
it
> is
> > > developed from cr28928 through a resistor r28928 to Zener diode
cr28907.
> > > (cathode shows 5 volts).
> > > Your zener cr28907 might be bad. If you lift that diode should see the
9
> > > volts from cr28928..
> > > Bruce.
> > > I am sending this message at 3:30pm eastern time , see how long it
takes
> > to
> > > get back to you....seems slow lately.
> > >
> > > B&T Electronics
> > > 139 Margaret St
> > > Sarnia Ontario
> > > Canada
> > > N7T 2Y3
> > > 519 344 1850
> > >
> > > ----- Original Message -----
> > > From: "al m" <ampm@xxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, May 10, 2004 1:57 PM
> > > Subject: [TechAssist] Re: Chipper check need schematic
> > >
> > >
> > > > Has anyone who is having trouble looked at their chipper checker? I
> have
> > > > 1.4V on the secondary side and the print says 5V. Does anyone know
the
> > > > waveform that's on the primary of the transformer. Mine seems to be
> > > running
> > > > but I can't get 5V out of it. Maybe someone you has one that is
> working
> > > > could see if the 5V is there, Cause to disconnect on this board is
> gonna
> > > be
> > > > tough to see what's holding this down if anything.
> > > > Al Marquardt
> > > > ampm@xxxxxxx
> > > > Al Marquardt Electronic Repair
> > > > 206 W Main
> > > > Girardville Pa. 17935
> > > > ----- Original Message -----
> > > > From: "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx>
> > > > To: "al m" <ampm@xxxxxxx>
> > > > Sent: Wednesday, April 28, 2004 7:24 AM
> > > > Subject: Re: [TechAssist] Re: Chipper check need schematic
> > > >
> > > >
> > > > > Hi Al,
> > > > >
> > > > > Sorry, I meant to respond yesterday, but I didn't have a good day
> :-)
> > > > >
> > > > > Everytihign looked so simple when I was looking at the revised
> > > schematic.
> > > > > Now on the original print, I see the isolated 5V schematic. U904
> makes
> > > an
> > > > > oscillator that drives two transistors, and energizes the primary
of
> > the
> > > > > transformer. The secondary is pretty normal.
> > > > >
> > > > > Sorry, I should've looked closer yesterday. I'll be back at the
> > keyboard
> > > > > this PM, if you have any questions.
> > > > >
> > > > > John
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "al m" <ampm@xxxxxxx>
> > > > > To: "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx>
> > > > > Sent: Tuesday, April 27, 2004 1:06 PM
> > > > > Subject: Re: [TechAssist] Re: Chipper check need schematic
> > > > >
> > > > >
> > > > > > John I'm talking about the 5V on the secondary side of the
> > > transformer.
> > > > Is
> > > > > > that developed from the transformer? I have the 5V on the
primary
> > > side,
> > > > > > although it's high 5.46V.
> > > > > > Al Marquardt
> > > > > > ampm@xxxxxxx
> > > > > > Al Marquardt Electronic Repair
> > > > > > 206 W Main
> > > > > > Girardville Pa. 17935
> > > > > > ----- Original Message -----
> > > > > > From: "John @ Myers TV" <myers_tv@xxxxxxxxxxxxx>
> > > > > > To: "al m" <ampm@xxxxxxx>
> > > > > > Sent: Tuesday, April 27, 2004 11:56 AM
> > > > > > Subject: Re: [TechAssist] Re: Chipper check need schematic
> > > > > >
> > > > > >
> > > > > > > Hi Al,
> > > > > > >
> > > > > > > The 5 V doesn't come off the secondary side. It is derived
> > directly
> > > > from
> > > > > > the
> > > > > > > 12V coming into the board from the power supply. If you have
no
> > 5V,
> > > > > check
> > > > > > > R920 & R921. They are either 100, or 150 Ohms @ 1W.
> > > > > > > This PDF of the schematis it about 500K. I could forward if
> that'd
> > > > help.
> > > > > > > Just let me know if your box has the revision 1.2, or not.
> > > > > > >
> > > > > > > John
> > > > > > > ----- Original Message -----
> > > > > > > From: "al m" <ampm@xxxxxxx>
> > > > > > > To: <myers_tv@xxxxxxxxxxxxx>
> > > > > > > Sent: Tuesday, April 27, 2004 9:59 AM
> > > > > > > Subject: Re: [TechAssist] Re: Chipper check need schematic
> > > > > > >
> > > > > > >
> > > > > > > > John Does it have any tips on repairing the interface box? I
> > > opened
> > > > > mine
> > > > > > > up
> > > > > > > > and there is no 5V on the transformer secondary side. Can
you
> > > > explain
> > > > > > how
> > > > > > > > the 5V is developed, or where it comes from. Maybe I'm
missing
> > > > > > something.
> > > > > > > > Al Marquardt
> > > > > > > > ampm@xxxxxxx
> > > > > > > > Al Marquardt Electronic Repair
> > > > > > > > 206 W Main
> > > > > > > > Girardville Pa. 17935
> > > > > > > > ----- Original Message -----
> > > > > > > > From: "John @ Myers TV" <>
> > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > Sent: Tuesday, April 27, 2004 7:40 AM
> > > > > > > > Subject: [TechAssist] Re: Chipper check need schematic
> > > > > > > >
> > > > > > > >
> > > > > > > > > Hi guys,
> > > > > > > > >
> > > > > > > > > Sorry I didn't jump in with this sooner. The schematics &
> > parts
> > > > list
> > > > > > fro
> > > > > > > > > chippercheck are on the partsfinder disk. At least they
were
> > on
> > > my
> > > > > > March
> > > > > > > > > 2002 disk, which is the most recent one I have.
> > > > > > > > >
> > > > > > > > > Go to the service information tab, then choose main
> contents.
> > > This
> > > > > > > brings
> > > > > > > > up
> > > > > > > > > a HTML page. The chipper check info is linked from that
> page.
> > > > > > > > >
> > > > > > > > > If anyone needs it uploaded to the members area, just let
me
> > > know.
> > > > > > > > >
> > > > > > > > > John Myers
> > > > > > > > > Myers TV Service Since 1984
> > > > > > > > > Alliance, OH
> > > > > > > > > ph 330-821-6545
> > > > > > > > > ----- Original Message -----
> > > > > > > > > From: "Intrepid Video Support"
<support@xxxxxxxxxxxxxxxxxx>
> > > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > > Sent: Monday, April 26, 2004 5:34 PM
> > > > > > > > > Subject: [TechAssist] Re: Chipper check need schematic
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > > Al,
> > > > > > > > > > If you get this figured out before me, please share with
> the
> > > > > list..
> > > > > > > > > > Thanks.
> > > > > > > > > > I thought maybe I had a PC problem, since I get the same
> > > errors
> > > > > eve
> > > > > > if
> > > > > > > I
> > > > > > > > > disconnect the printer cable.
> > > > > > > > > > I reinstalled Windows XP last week and tried it again
> today,
> > > so
> > > > I
> > > > > > > assume
> > > > > > > > > the problem is with the box..
> > > > > > > > > > Jeff
> > > > > > > > > > --
> > > > > > > > > > Intrepid Video TV/VCR Repair
> > > > > > > > > > 263 S Front St, Steelton PA 17113
> > > > > > > > > > 717-939-7708; (F) 717-564-4952
> > > > > > > > > > www.intrepid-video.com www.tech-repair.net
> > > > > > > > > > ----- Original Message -----
> > > > > > > > > > From: "al m" <ampm@xxxxxxx>
> > > > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > > > Sent: Monday, April 26, 2004 4:15 PM
> > > > > > > > > > Subject: [TechAssist] Re: Chipper check need schematic
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Well after some time I still haven't figured how that 5V
> > power
> > > > > > supply
> > > > > > > > > > starts. Can anyone tell me what is supposed to start the
> > > supply?
> > > > > > > > > > I have no 5V supply for the micro.
> > > > > > > > > > Al Marquardt
> > > > > > > > > > ampm@xxxxxxx
> > > > > > > > > > Al Marquardt Electronic Repair
> > > > > > > > > > 206 W Main
> > > > > > > > > > Girardville Pa. 17935
> > > > > > > > > > ----- Original Message -----
> > > > > > > > > > From: "al m" <ampm@xxxxxxx>
> > > > > > > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > > > > > > Sent: Sunday, April 25, 2004 1:24 PM
> > > > > > > > > > Subject: [TechAssist] Chipper check need schematic
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > > My chipper checker stopped working. Does anyone know
> where
> > > to
> > > > > get
> > > > > > a
> > > > > > > > > print
> > > > > > > > > > of
> > > > > > > > > > > the interface box? I opened it up and can find no 5V
on
> > the
> > > > > EPROM.
> > > > > > I
> > > > > > > > > > tested
> > > > > > > > > > > the box with the chipper checker test and it comes up
> > cannot
> > > > > find
> > > > > > > > EPROM.
> > > > > > > > > I
> > > > > > > > > > > need to know what is holding down the 5V. there is a
> diode
> > > by
> > > > a
> > > > > > > > > > transformer
> > > > > > > > > > > that may be a zener but I don't want to fool around
too
> > > much.
> > > > > > > Thanks.
> > > > > > > > > The
> > > > > > > > > > 5V
> > > > > > > > > > > coming through the interconnect cord from the adapter
is
> > > there
> > > > > > until
> > > > > > > I
> > > > > > > > > > > connect it to the connector on the interface, then it
> > drops
> > > to
> > > > > > 1.3V.
> > > > > > > > The
> > > > > > > > > > box
> > > > > > > > > > > fell off the desk and right after that stopped
working.
> > Can
> > > > find
> > > > > > no
> > > > > > > > > > > cracks.Thanks.
> > > > > > > > > > > Al Marquardt
> > > > > > > > > > > ampm@xxxxxxx
> > > > > > > > > > > Al Marquardt Electronic Repair
> > > > > > > > > > > 206 WE Main
> > > > > > > > > > > Girardville Pa. 17935
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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