Chipper Check schematics and more are here: http://www.thomsonnetwork.com/unprotected/Dynamic/1,5078,-8F4958C6AFD03030E0339DFEEACC3030,00.html If you can get that to work, try www.thomson.net and choose chipper check links provided. Wayne Vanaman Omega Electronics 6904 W Fairfield Dr Pensacola, Fl. 32506-3310 Wayne@xxxxxxxxxxxxxxxxxxxxx WWW.PensacolaTVRepair.Com 850-456-5995 voice 850-458-6369 fax ----- Original Message ----- From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Monday, May 10, 2004 2:31 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 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > > > > > > > --- > > > > > > > > > Lost Password: > > > > > > > > > http://www.tech-assist.org and select "Login Problems?". > > > > > > > > > Email Archives: > > > > > > > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > > > > > > --- > > > > > > > > Lost Password: > > > > > > > > http://www.tech-assist.org and select "Login Problems?". > > > > > > > > Email Archives: > > > > > > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > > > > > > --- > > > > > > > > Lost Password: > > > > > > > > http://www.tech-assist.org and select "Login Problems?". > > > > > > > > Email Archives: > > > > > > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > > > > > > --- > > > > > > > Lost Password: > > > > > > > http://www.tech-assist.org and select "Login Problems?". > > > > > > > Email Archives: > > > > > > > //www.freelists.org/archives/techassist/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------------- > --- > > Lost Password: > > http://www.tech-assist.org and select "Login Problems?". > > Email Archives: > > //www.freelists.org/archives/techassist/ > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". 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