[TowerTalk] M2 RC2800PX Control Box

[Steve Maki]

AFAIK, nobody likes the RC2800PX control box, not even it's mother and 
father.

-Steve K8LX

On 9/15/2021 5:10 PM, Riki, K7NJ wrote:
> I'm trying to troubleshoot the RC2800PX control box used to control the
> OR-2800 rotator.  This is the rotator with an AC motor.
> 
> After switching on the control box and momentarily pressing  and releasing
> one of the rotate buttons (CCW or CW), the rotator continues rotating until
> the main power switch is turned off.  Afterwards, turning the power switch
> back on does not result in any rotation until one of the rotate buttons is
> pressed, and then the previously described situation occurs once again.
> 
> The instruction manual has only a very minimal "schematic" which isn't
> really a schematic at all.  And there is no parts list in the manual. M2
> says that they don't have any additional documentation.  Whenever they have
> a problem with a board inside the control box, in most cases, they replace
> the entire board with a new one. They did say that most often (in 95% of the
> cases like this) the problem is due to the Triac - Q31 - part number
> BTB08700TW which is what is used in the DC control box, but likely the same
> for the AC control box.
> 
> Any assistance in accomplishing this repair would be greatly appreciated.
> Obtaining a schematic and a parts list would be awesome.  Also helpful would
> be knowing that possibly someone has replaced the BTB08700TW triac (or
> whatever is being used in the AC control box) with a more robust drop-in
> replacement.
> 
> 73, Riki K7NJ
> 
> 
>