Hello Jens: Can you send me this HM605 manual by this way, please? Thank in advanced
Oscar Garcia Cali Colombia [EMAIL PROTECTED] ----- Original Message ----- To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> Sent: Friday, July 02, 2004 7:14 AM > At 15:28 01.07.2004 -0800, H.C. Croon wrote: > > >I have the HM605 with schematic. Perhaps there is some similarity. > > > >In the schematic of the 605 the fly back suppresionpuls is coupled to > >the cathode circuit of the CRT, which is at high negative voltage, by > >an opto coupler. The output of the opto coupler is amplified by a > >complementary pair (BF440 (PNP) and BF199 (NPN)) and given to the > >cathode. > > It might be a similar circuit, but I haven't found ay PNP transistors in > that area yet. Exchanging T606 helped a bit, I can now adjust intensity to > a spot where the fly back is invisible and the picture is absolutely > perfect. However, the beam still stays on while the scope is waiting for a > trigger event, and I bet it's not meant to be this way (I haven't used this > scope for the past 4 years). > > I'd appreciate a scan of that page, and maybe the trigger circuit page, > because there must be some link to the suppression circuit. > > If anyone on this list has the schematic of a HM604, it would be even better. > > As for the BF311, I just bought "any" that I could get (BF311 is *not* > obsolete as some pages suggest), and soldered that in. > > ciao, > -- > Jens Sch�nfeld > > -- > Author: Jens =?iso-8859-1?Q?Sch=F6nfeld?= > INET: [EMAIL PROTECTED] > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > > -- Author: =?iso-8859-1?Q?Ing._Oscar_Garc=ECa_de_la_Fe?= INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
