KAOSKAOS
Ouwe rot
Weet iemand nog de battery drain fix voor de multitrak?
krijg m op t net niet meer gevonden
krijg m op t net niet meer gevonden
Batterij fix Sci Multitrak
- Thread starter KAOSKAOS
- Start date
KAOSKAOS
Ouwe rot
`Jammer dat schema en fotos onleesbaar zijn
maar thanks iig
maar thanks iig
j.baars
vintage eigenheimer
- Lid sinds
- 22 februari 2005
- Berichten
- 12.349
voor het nageslacht...
In fact, my MultiTrak had a design bug, which lead to the short lifetime of the battery. If you want to fix this, disassemble your MultiTrak (i don't describe the procedure here, you can find out yourself or somewhere else i think), remove the keyboard cable and put the electronics assembly in front of you, with the connectors away from you. Remove the voice board (the upper board of the stack of 2 large boards) to reveal the CPU board. Near the keyboard connector, you see a large 40 pin chip, which is the keyboard processor, and right of the keyboard connector, you find a CD4022 (maybe it has other letters, but it must have the number 4022 on it). Left of this chip, there are 2 resistors of 10KOhms. The left one (more away from the 4022) is the one we neeed to touch. Desolder the pin of the left resistor which is nearer to you (goes to a thick trace, which connects it with its neighbour resistor), you can also cut it, but we need to connect it elsewhere, so be careful when cutting it. Next, isolate the board and maybe the neighbour resistor, that your midification can't touch something it shouldn't. Now connect the resistors open end to pin 16 of the 4022. That's it. Maybe you want to fix everything with some hot melt glue or another piece of isolation tape. Of just use a piece of wire stiff enough to keep everything in place.
In fact, my MultiTrak had a design bug, which lead to the short lifetime of the battery. If you want to fix this, disassemble your MultiTrak (i don't describe the procedure here, you can find out yourself or somewhere else i think), remove the keyboard cable and put the electronics assembly in front of you, with the connectors away from you. Remove the voice board (the upper board of the stack of 2 large boards) to reveal the CPU board. Near the keyboard connector, you see a large 40 pin chip, which is the keyboard processor, and right of the keyboard connector, you find a CD4022 (maybe it has other letters, but it must have the number 4022 on it). Left of this chip, there are 2 resistors of 10KOhms. The left one (more away from the 4022) is the one we neeed to touch. Desolder the pin of the left resistor which is nearer to you (goes to a thick trace, which connects it with its neighbour resistor), you can also cut it, but we need to connect it elsewhere, so be careful when cutting it. Next, isolate the board and maybe the neighbour resistor, that your midification can't touch something it shouldn't. Now connect the resistors open end to pin 16 of the 4022. That's it. Maybe you want to fix everything with some hot melt glue or another piece of isolation tape. Of just use a piece of wire stiff enough to keep everything in place.
marcmarc
Ouwe rot
Als je van de school van Helmut Tunker bent ga je op den duur onbegrijpelijke worden voor 'normale' mensen. 
Het feit dat ik begrijp wat je aanhaalt, geeft al te denken voor wat mij aangaat
Het feit dat ik begrijp wat je aanhaalt, geeft al te denken voor wat mij aangaat
KAOSKAOS
Ouwe rot
was het gezellig in de kroeg ?
Vergelijkbare discussies
