Otari 5050 won't rewind Fast forward

[[email protected]]

Hi guys , I bought 2 Otari 5050's I am working on the 1st one. After cleaning it up It plays at 7.5 and 15ips. It won't go into rewind or fast forward. Anyone know where to look? GT.

[Mike Rivers[_2_]]

On 6/21/2013 8:36 PM, wrote:
> Hi guys , I bought 2 Otari 5050's I am working on the 1st one.
> After cleaning it up It plays at 7.5 and 15ips. It won't go into
> rewind or fast forward. Anyone know where to look?

Look in the service manual.
http://www.analogrules.com/manuals/otari_manuals1.html

You won't find a chapter heading "Won't Go Into Rewind or Fast Forward"
but the manual will tell you how it's supposed to work, and the
schematics will help you to trace through the logic, power, and
switching circuitry.




--
For a good time, call http://mikeriversaudio.wordpress.com

[[email protected]]

On Friday, June 21, 2013 8:36:45 PM UTC-4, wrote:
> Hi guys , I bought 2 Otari 5050's I am working on the 1st one. After cleaning it up It plays at 7.5 and 15ips. It won't go into rewind or fast forward. Anyone know where to look? GT.

Yes I have just got the service manual and the schematics. It looks like there are some questionable solder joints to go over. GT

[None]

"Mike Rivers" > wrote in message
...
> On 6/21/2013 8:36 PM, wrote:
>> Hi guys , I bought 2 Otari 5050's I am working on the 1st one.
>> After cleaning it up It plays at 7.5 and 15ips. It won't go into
>> rewind or fast forward. Anyone know where to look?
>
> Look in the service manual.
> http://www.analogrules.com/manuals/otari_manuals1.html
>
> You won't find a chapter heading "Won't Go Into Rewind or Fast
> Forward" but the manual will tell you how it's supposed to work, and
> the schematics will help you to trace through the logic, power, and
> switching circuitry.

I remember troubleshooting transport problems on a cranky
MX-5050B (I think) back in the cretaceous. Most of the problems
I fixed were solder-joint problems in the logic and switching
circuitry.
I don't have the service manual (it belonged to the studio), but my
recollection is that the manual was accurate, thorough, and
extremely helpful.

Back then, I was very deft with a soldering iron. Once the problem
was identified, the repair typically only took a few moments. One
time, it was a solder-whisker that had grown into a short, so I
learned to identify the layout issues. Two circuits that are located
near each other physically on the circuit board can be an issue,
even if a schematic or logic diagram shows no relationship
between them.

[None]

"Mike Rivers" > wrote in message
...
> On 6/21/2013 8:36 PM, wrote:
>> Hi guys , I bought 2 Otari 5050's I am working on the 1st one.
>> After cleaning it up It plays at 7.5 and 15ips. It won't go into
>> rewind or fast forward. Anyone know where to look?
>
> Look in the service manual.
> http://www.analogrules.com/manuals/otari_manuals1.html
>
> You won't find a chapter heading "Won't Go Into Rewind or Fast
> Forward" but the manual will tell you how it's supposed to work, and
> the schematics will help you to trace through the logic, power, and
> switching circuitry.

I remember troubleshooting transport problems on a cranky
MX-5050B (I think) back in the cretaceous. Most of the problems
I fixed were solder-joint problems in the logic and switching
circuitry.
I don't have the service manual (it belonged to the studio), but my
recollection is that the manual was accurate, thorough, and
extremely helpful.

Back then, I was very deft with a soldering iron. Once the problem
was identified, the repair typically only took a few moments. One
time, it was a solder-whisker that had grown into a short, so I
learned to identify the layout issues. Two circuits that are located
near each other physically on the circuit board can be an issue,
even if a schematic or logic diagram shows no relationship
between them.

[None]

"None" > wrote in message
m...
> time, it was a solder-whisker that had grown into a short, so I
> learned to identify the layout issues. Two circuits that are located
> near each other physically on the circuit board can be an issue,
> even if a schematic or logic diagram shows no relationship
> between them.

.... connector pin-outs are also relevent here.