lanxe
Well-known member
HI,
I just got an Otari MX5050 MKIII-2 (2 for two track) 1/4" tape machine in the mail. I was told it was in fine working condition....>but of course it is not.
At first i had many problems........but i have fixed most of those. My only problem now is with the play speed (and record speed). the capstan and pinch roller work 100% with the tension arm and safety switch. Fast forward works fine (turns on right take up reel at the right speed). Rewind works fine (turns on left supply reel at the right speed).
but when i push play both the supply reel and the take up reel turn on as if i pushed fastforward and rewind at the same time (both motors spin slightly slower than if i were to push fast forward or rewind, but not much slower). the motors are spinning fast and in the opposite direction (right, takeup reel spins counterclockwise, left supply reel spins clockwise). WHAT THE HELL?
does anybody have a schematic or more info than what is on otari's website?
i assume that the motor speeds are controlled by voltage......so is there an adjustment for this voltage?
the seller is being cool and is going to send a parts machine, so i should have some spare parts but i would like to have a place to start.
i traced the motor wires back to the pcb that is right between them. its a rather simple pcb, looks like its where the motor power is coming from. connections are fine to that board.
thanks guys,
Ryan
I just got an Otari MX5050 MKIII-2 (2 for two track) 1/4" tape machine in the mail. I was told it was in fine working condition....>but of course it is not.
At first i had many problems........but i have fixed most of those. My only problem now is with the play speed (and record speed). the capstan and pinch roller work 100% with the tension arm and safety switch. Fast forward works fine (turns on right take up reel at the right speed). Rewind works fine (turns on left supply reel at the right speed).
but when i push play both the supply reel and the take up reel turn on as if i pushed fastforward and rewind at the same time (both motors spin slightly slower than if i were to push fast forward or rewind, but not much slower). the motors are spinning fast and in the opposite direction (right, takeup reel spins counterclockwise, left supply reel spins clockwise). WHAT THE HELL?
does anybody have a schematic or more info than what is on otari's website?
i assume that the motor speeds are controlled by voltage......so is there an adjustment for this voltage?
the seller is being cool and is going to send a parts machine, so i should have some spare parts but i would like to have a place to start.
i traced the motor wires back to the pcb that is right between them. its a rather simple pcb, looks like its where the motor power is coming from. connections are fine to that board.
thanks guys,
Ryan