UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

simondhopkins · 8th Feb 2019, 7:22 pm

Hi there,

I have a dead technics pr305 in my living room wanting some tlc to get it working again.

No lights what so ever on the control panel but the power led on the frond of the piano comes on.

It has 15v at the test point on the main board, but trying to find the 5v is proving a pain.

Also is it possible that the reset is being shorted to stop it powering up (got power led on on front of piano) and if so what is the reset line voltage ment to be and is it just a pulse or continual signal to keep the cpu up?

Any other ideas would be greatly received too to check using just a digital multimeter.

Thanks.

8th Feb 2019, 7:22 pm	#1
simondhopkins Retired Dormant Member Join Date: Feb 2019 Location: Burnley, Lancashire, UK. Posts: 1	Technics PR305 Hi there, I have a dead technics pr305 in my living room wanting some tlc to get it working again. No lights what so ever on the control panel but the power led on the frond of the piano comes on. It has 15v at the test point on the main board, but trying to find the 5v is proving a pain. Also is it possible that the reset is being shorted to stop it powering up (got power led on on front of piano) and if so what is the reset line voltage ment to be and is it just a pulse or continual signal to keep the cpu up? Any other ideas would be greatly received too to check using just a digital multimeter. Thanks.