yeah i pulled....i´ll check continuity thanks again --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote: > > check the cable > > make sure you have continuity > > when removing the cable did you pull on it > > as your supposed to use a hook tool > ----- Original Message ----- > From: cheju_99 > To: emax@yahoogroups.com > Sent: Wednesday, July 25, 2012 3:11 AM > Subject: [emax] Re: No black boxes boot > > > > Yeah... you really hit the ball!!! Thanks for the advice. I connected to a m-audio controller keyb via midi channel 1, and it sounds with no problem!! But I have no leds light on the emax and no pannels buttons activated, i only could change presets via the m-audio controller. It does mean that i bypassed the scanner chip? The internal keyb and Pannel buttons is the problem? What do you think > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: > > > > even if you remove keyboard its still connected via midi mode > > ----- Original Message ----- > > From: cheju_99 > > To: emax@yahoogroups.com > > Sent: Monday, July 23, 2012 2:32 AM > > Subject: [emax] Re: No black boxes boot > > > > > > > > Yes but even i disconnect the keyboard conector and got the same. When i turn on the emax all the led turn on for a few miliseconds. > > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: > > > > > > front panel is done by the scanner chip and cpu > > > > > > so are the keys > > > > > > sustaning notes is usually a bad diode on the keyboard some where > > > ----- Original Message ----- > > > From: cheju_99 > > > To: emax@yahoogroups.com > > > Sent: Sunday, July 22, 2012 11:42 PM > > > Subject: [emax] Re: No black boxes boot > > > > > > > > > > > > Finally after reseating some ic´s the unit began to boot from the diskette, now the problem is : it load the preset tone but i have no access to the front panel buttons, even no lights form the form panel leds, and also when i press the music keyboard it becomes a totally mess, with tones in chaos no scale, sustain for ever......recently i changed the scanner chip with a nes one form eprelectronics but nothing happens.... any idea? > > > > > > --- In emax@yahoogroups.com, "cheju_99" <cheju_99@> wrote: > > > > > > > > Ok great advice i'll ask Ted > > > > Thanks for your time > > > > > > > > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: > > > > > > > > > > basically send it to ted who can test against another mainboard to see where the problem is > > > > > > > > > > as you could be nocking your head against the wall not know what is actually wrong > > > > > > > > > > you could be changing chips that dont need changing > > > > > > > > > > as it could be a cap thats gone down to earth and dropping a signal to zero volts > > > > > > > > > > with out a scope or a anilyser you cant tell > > > > > > > > > > as ted can test a good working machine and compare the functions from the none working machine to see if the signals are correct > > > > > ----- Original Message ----- > > > > > From: cheju_99 > > > > > To: emax@yahoogroups.com > > > > > Sent: Sunday, June 10, 2012 10:05 PM > > > > > Subject: [emax] Re: black boxes No boot > > > > > > > > > > > > > > > > > > > > Its a keyboard i upload some photos to the forum > > > > > > > > > > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: > > > > > > > > > > > > no the lcd control is seperste from the scanner cpu > > > > > > > > > > > > the scanner cpu deals with the keyboard matrix of notes and velocity > > > > > > > > > > > > and also scans the front control buttons when a momentary pulse from a button it goes to the correct software access and lights a led if there is a led function for it via some logic switches > > > > > > > > > > > > the scanner interfaces with the main cpu giving it all the control information > > > > > > > > > > > > cpu with other logic chips deals with the lcd but gets the control information from the scanner cpu and duart > > > > > > > > > > > > what board do you have rack or keyboard > > > > > > ----- Original Message ----- > > > > > > From: cheju_99 > > > > > > To: emax@yahoogroups.com > > > > > > Sent: Sunday, June 10, 2012 8:44 PM > > > > > > Subject: [emax] Re: black boxes No boot > > > > > > > > > > > > > > > > > > > > > > > > I am thinking this must be related to a failure in the front panel panel, what do you think? > > > > > > > > > > > > --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote: > > > > > > > > > > > > > > broken floppy > > > > > > > > > > > > > > this can also make the lcd screen crash > > > > > > > > > > > > > > remove floppy drive idc cable and see if it comes up with the emu screen > > > > > > > > > > > > > > it could be a number of chips but i would check the floppy disk controller > > > > > > > > > > > > > > if your brother is a digital electronics technician then he can check the pulses with a logic anilyser and cross reference with the pdf for the pulse signals to see if he is getting correct signals > > > > > > > > > > > > > > also have you got the cable the corect way on the floppy is it an original or a replacement as if its a replacement the floppy cable goes the oposit to the original version > > > > > > > > > > > > > > as you have to do that on all models due to the manufactureres setting the to pc standard and pin 1 is the oposit side > > > > > > > ----- Original Message ----- > > > > > > > From: cheju_99 > > > > > > > To: emax@yahoogroups.com > > > > > > > Sent: Sunday, June 10, 2012 6:58 PM > > > > > > > Subject: [emax] Re: black boxes No boot > > > > > > > > > > > > > > > > > > > > > > > > > > > > Yes i already check the cables pin 1 is ok. My brother (digital electronics technician) insist that is a power issue, 'cos no spin on the floopy but we checked completely the psu and q2 on the board but the volts are ok, i am seriously thinkig my pal chips are dead, what do you think??? > > > > > > > > > > > > > > --- In emax@yahoogroups.com, Ted Summers <djtbs1@> wrote: > > > > > > > > > > > > > > > > You may also wish to reseat the IC's on the right half of the Emax logic board including the EPROM. > > > > > > > > My testbed for the SCSI kits does this as it gets flexed from many IC removal / replacement and so the seating of IC's isn't great. > > > > > > > > > > > > > > > > Once I reseat everything I will get my display back and floppy whirring away- IT's ALIVE, ALIVE!!!! > > > > > > > > BWAHAHAHA!!! > > > > > > > > > > > > > > > > Just a thought. > > > > > > > > The other option is to send it to jammie or me (depend on where you live). I doubt it is dead, you may just be looking at the wrong thing / area of the board. > > > > > > > > > > > > > > > > or Jammie has some boards... I do believe. > > > > > > > > > > > > > > > > Thx, > > > > > > > > Ted > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On Jun 10, 2012, at 2:12 AM, jammie wrote: > > > > > > > > > > > > > > > > check the digital to audio board cable have you got it reversed > > > > > > > > ----- Original Message ----- > > > > > > > > From: cheju_99 > > > > > > > > To: emax@yahoogroups.com > > > > > > > > Sent: Sunday, June 10, 2012 3:50 AM > > > > > > > > Subject: [emax] black boxes No boot > > > > > > > > > > > > > > > > After spending many dollars buying the technical manual, and the 6500 scan processor from eprelectronics, definitely with no success triying to start an emax 1- Right now got the unit with the display showing black boxes, a floppy drive who doesn´t spin, and definitely no boot. Any idea from the people´s forum????......hurry the trash truck is coming. > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > [Non-text portions of this message have been removed] >
Message
Re: No black boxes boot
2012-07-25 by cheju_99