Randall head Rh100 1generation (Red turn on/off knob)

[Saul]

So i bought a cheap head unit the Randall RH100 without the enclosure try it all good too weeks laters i plug it in as normal and the thing turn on but immediately turn off of what could it be what should i do T.T its my first time with a head it will be an expensive stuff ? thanks for the help ! btw anyone has the schematics D:?

 

[rjenkinsgb]

There is a schematic on Elektrotanya, here:

Elektrotanya for electronics experts

Electronics forum for electronics experts to repair defective appliance.

elektrotanya.com

 

[Saul]

There is a schematic on Elektrotanya, here:

Elektrotanya for electronics experts

Electronics forum for electronics experts to repair defective appliance.

elektrotanya.com

it's the same schematic ? that's the G2 version with a. blue knob turn on off

 

[Tony Stewart]

It's unlikely to be much different.

1: report Vdc+, Vdc-, Vout using DMM. (?) +/-50V , Power switch OK?
2, How old?


It's a cheap head. 100W <$100 used.

https://www.facebook.com/video.php?v=568464298364888

 

[Saul]

It's unlikely to be much different.

1: report Vdc+, Vdc-, Vout using DMM. (?) +/-50V , Power switch OK?
2, How old?


It's a cheap head. 100W <$100 used.

View attachment 141885

https://www.facebook.com/video.php?v=568464298364888

Thanks ill answer those two questions my worry is that the problem is some sort of expensive repair x.x

 

[Saul]

It's unlikely to be much different.

1: report Vdc+, Vdc-, Vout using DMM. (?) +/-50V , Power switch OK?
2, How old?


It's a cheap head. 100W <$100 used.

View attachment 141885

https://www.facebook.com/video.php?v=568464298364888

so update got it sent to teh technician and he told me eveyrthing was fine, only thing i know suspect is that i plug it in without the cab butwith the headphones on. for what i know solid state head can run without cabs and its supposed toi be fine since the headphones jack were plug and cuts the power send . any idea ?