In Need of a schematic or manual for a RT-8840S

[a88fl1]

Hello, I have a RT-8440S BomBeat that produces nothing but a hum on all inputs. Does anyone out there have a service manual for this model?

Thanks.

 

[dubout]

Did you try cleaning the record bar?

Record Switch Bar Example

A few boombox problems are caused by a dirty, or faulty, record switch / bar. Most of the times, the primary symptom is a high-pitched squeal when playing cassettes. Thorough cleaning with DeOxit or some other electronics cleaner will generally be the simple fix. Here is an example of what a...

boomboxery.com

 

[a88fl1]

Did you try cleaning the record bar?

Record Switch Bar Example

A few boombox problems are caused by a dirty, or faulty, record switch / bar. Most of the times, the primary symptom is a high-pitched squeal when playing cassettes. Thorough cleaning with DeOxit or some other electronics cleaner will generally be the simple fix. Here is an example of what a...

boomboxery.com

Thanks for the reply. I've tried flushing the record and input switch multiple times.