Garrard SP25 MKV speed selector - UK Vintage Radio Repair and Restoration Discussion Forum

matthew.roberts · 18th Jan 2021, 4:52 pm

Hi all
Newby here - I bought a Hitachi SDT 787820R just like my Dad's back in the 70s/80s for nostalgia reasons and als to use it!
So the record deck is stuck on 33 speed. The switch works nicely and I can follow the poles and connectors right round to the opposite corner of the unit, all moving nicely with the move of the switch, but I can't see a reason why it's not switching the motor to 45. However being a noob I don't know how the motor is finally switched to 45 at the end of all the poles and connections.

I had the motor out and can't see anything much to play with there.
I added a couple of photos, as I say the swicth moves the poles right round to the close up photo and moves the little plate into two different posssible positions

Any help greatly appreciated.

Thanks
Matthew

snowman_al · 18th Jan 2021, 5:17 pm

Surely the motor spins at the same speed all the time.
Its the position of the belt on the motor shaft that changes the speed... and that is what the 'switch' should move ie. the belt.

Hi and welcome by the way, Alan

matthew.roberts · 18th Jan 2021, 6:19 pm

Aha thanks for this - as I say I'm new to the inner workings of record decks so this is a whole new world

So I found a plastic THING that is meant to slide up and down to move the belt up and down when the switch is moved. I had a poke around with it last week and it was so solidly in its position I didnt want to mess any more but now I can see it's totally jammed up with grease thats gone hard.

Thanks so much for the help

ajgriff · 18th Jan 2021, 6:26 pm

I don't know whether or not you've got a copy of the manual so have attached one anyway. If you have a look at the diagrams you'll see that there's a forked lever, actuated by the switch, to move the belt up and down on the motor pulley. Probably some lubrication needed at some point but be careful not to contaminate the belt or the pulley.

Alan

matthew.roberts · 18th Jan 2021, 6:31 pm

Thanks so much for the help - as I say I'm a complete newby to what I was looking for - I did have a poke around at that part that the belt runs through, and it was very firmly in the up (33) position and the switch was happily sliding back and forth under it. It was so firmly in place that I left it well alone, but on further inspection now I can see it's completely seized in place with gone hard grease
SO thanks again for the pointer I'm going to try to clean away the gank so it can move freely up and down.
You guys a great

18th Jan 2021, 4:52 pm	#1
matthew.roberts Diode Join Date: Jan 2021 Location: Hove, East Sussex, UK. Posts: 3	Garrard SP25 MKV speed selector Hi all Newby here - I bought a Hitachi SDT 787820R just like my Dad's back in the 70s/80s for nostalgia reasons and als to use it! So the record deck is stuck on 33 speed. The switch works nicely and I can follow the poles and connectors right round to the opposite corner of the unit, all moving nicely with the move of the switch, but I can't see a reason why it's not switching the motor to 45. However being a noob I don't know how the motor is finally switched to 45 at the end of all the poles and connections. I had the motor out and can't see anything much to play with there. I added a couple of photos, as I say the swicth moves the poles right round to the close up photo and moves the little plate into two different posssible positions Any help greatly appreciated. Thanks Matthew Attached Thumbnails

18th Jan 2021, 5:17 pm	#2
snowman_al Octode Join Date: Dec 2018 Location: Llandeilo, West Wales, UK. Posts: 1,092	Re: Garrard SP25 MKV speed selector Surely the motor spins at the same speed all the time. Its the position of the belt on the motor shaft that changes the speed... and that is what the 'switch' should move ie. the belt. Hi and welcome by the way, Alan __________________ Never Leave Well Enough Alone... Last edited by snowman_al; 18th Jan 2021 at 5:25 pm. Reason: Welcome

18th Jan 2021, 6:19 pm	#3
matthew.roberts Diode Join Date: Jan 2021 Location: Hove, East Sussex, UK. Posts: 3	Re: Garrard SP25 MKV speed selector Aha thanks for this - as I say I'm new to the inner workings of record decks so this is a whole new world So I found a plastic THING that is meant to slide up and down to move the belt up and down when the switch is moved. I had a poke around with it last week and it was so solidly in its position I didnt want to mess any more but now I can see it's totally jammed up with grease thats gone hard. Thanks so much for the help

18th Jan 2021, 6:31 pm	#5
matthew.roberts Diode Join Date: Jan 2021 Location: Hove, East Sussex, UK. Posts: 3	Re: Garrard SP25 MKV speed selector Thanks so much for the help - as I say I'm a complete newby to what I was looking for - I did have a poke around at that part that the belt runs through, and it was very firmly in the up (33) position and the switch was happily sliding back and forth under it. It was so firmly in place that I left it well alone, but on further inspection now I can see it's completely seized in place with gone hard grease SO thanks again for the pointer I'm going to try to clean away the gank so it can move freely up and down. You guys a great