Hitachi SDT400 - UK Vintage Radio Repair and Restoration Discussion Forum

thelegend2020 · 15th Dec 2018, 11:17 am

I have an Hitachi SDT400, the problem is that the tone arm is ejecting before the record ends, I would say that it is at least 2cm too soon. Does anybody know how to adjust the tone arm to solve the problem

regards

Rob

'LIVEWIRE?' · 15th Dec 2018, 12:15 pm

One possibility is dried grease, particularly around the cam gear and Trip Pawl assembly. These components are located under the platter, which is easily removed. IIRC it simply pulls off, having first removed the drive belt from around the motor pulley. The Cam Gear is the large white gearwheel to the right of the center spindle, whilst the Trip Pawl is two metal levers attached to this gear. These levers must be free of grease and pivot freely. There are 'sticky' threads about the SDT400, which can be found by typing 'Hitachi SDT400' into the Google search box at the top of the page. At least one thread has an illustration of the components concerned, which should help you find the answer to the problem you describe. (Edit) Do not attempt any adjustments to the tone arm until the above points have been checked.

15th Dec 2018, 11:17 am	#1
thelegend2020 Retired Dormant Member Join Date: Dec 2018 Location: Bodmin, Cornwall, UK. Posts: 1	Hitachi SDT400 I have an Hitachi SDT400, the problem is that the tone arm is ejecting before the record ends, I would say that it is at least 2cm too soon. Does anybody know how to adjust the tone arm to solve the problem regards Rob

15th Dec 2018, 12:15 pm	#2
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Hitachi sdt400 One possibility is dried grease, particularly around the cam gear and Trip Pawl assembly. These components are located under the platter, which is easily removed. IIRC it simply pulls off, having first removed the drive belt from around the motor pulley. The Cam Gear is the large white gearwheel to the right of the center spindle, whilst the Trip Pawl is two metal levers attached to this gear. These levers must be free of grease and pivot freely. There are 'sticky' threads about the SDT400, which can be found by typing 'Hitachi SDT400' into the Google search box at the top of the page. At least one thread has an illustration of the components concerned, which should help you find the answer to the problem you describe. (Edit) Do not attempt any adjustments to the tone arm until the above points have been checked. Last edited by 'LIVEWIRE?'; 15th Dec 2018 at 12:32 pm.