Connecting Record/Erase head wires Akai GX210d - UK Vintage Radio Repair and Restoration Discussion Forum

Entangler · 4th Dec 2021, 1:35 am

The thin black wire that connects to the center lug on my Akai GX210d Record/Erase head is still attached to the "center" lug on the head, but has come loose from wherever it is supposed to connect to at the other end. I can't even find that wire on the schematic, so am at a loss where to resolder it.
Help!

DMcMahon · 4th Dec 2021, 10:44 am

Is there any fault associated with this wire not being connected ?

Do you have a photo of the head wiring and the black wire not being connected ?

David

Restoration73 · 4th Dec 2021, 12:55 pm

The circuit shows the two erase coils in series, so the wire is probably the screen, and
should be connected to any ground point that can be soldered, e.g. existing tag.

Entangler · 4th Dec 2021, 6:29 pm

I am guessing it goes to ground, but want to confirm before soldering it in. It's the thin black wire that connects to a rectangular lug that sits in the middle of the back between the other solder tabs.

DMcMahon · 5th Dec 2021, 12:19 am

I have just checked my GX-210D.

Yes it connects to ground. The short black wire connects to a solder tag just above and to the left of the Erase/Record head, the solder tag is secured to the head plate which is at ground potential.

There also is a black sleeved wire connected to the tag, this is the screen of the 2 core (red and white) screened cable for the erase signals that connect from the head to the 10 way P9 card edge type plug (plugs into J9) pins 9 and 10 just a few inches behind.

Entangler · 5th Dec 2021, 12:22 am

PERFECT!
Thanks all…will resolder and reassemble!!

4th Dec 2021, 1:35 am	#1
Entangler Diode Join Date: Apr 2021 Location: Regina, Saskatchewan, Canada Posts: 5	Connecting Record/Erase head wires Akai GX210d The thin black wire that connects to the center lug on my Akai GX210d Record/Erase head is still attached to the "center" lug on the head, but has come loose from wherever it is supposed to connect to at the other end. I can't even find that wire on the schematic, so am at a loss where to resolder it. Help!

4th Dec 2021, 10:44 am	#2
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,604	Re: Connecting Record/Erase head wires Akai GX210d Is there any fault associated with this wire not being connected ? Do you have a photo of the head wiring and the black wire not being connected ? David

4th Dec 2021, 12:55 pm	#3
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: Connecting Record/Erase head wires Akai GX210d The circuit shows the two erase coils in series, so the wire is probably the screen, and should be connected to any ground point that can be soldered, e.g. existing tag.

4th Dec 2021, 6:29 pm	#4
Entangler Diode Join Date: Apr 2021 Location: Regina, Saskatchewan, Canada Posts: 5	Re: Connecting Record/Erase head wires Akai GX210d I am guessing it goes to ground, but want to confirm before soldering it in. It's the thin black wire that connects to a rectangular lug that sits in the middle of the back between the other solder tabs. Attached Thumbnails

5th Dec 2021, 12:19 am	#5
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,604	Re: Connecting Record/Erase head wires Akai GX210d I have just checked my GX-210D. Yes it connects to ground. The short black wire connects to a solder tag just above and to the left of the Erase/Record head, the solder tag is secured to the head plate which is at ground potential. There also is a black sleeved wire connected to the tag, this is the screen of the 2 core (red and white) screened cable for the erase signals that connect from the head to the 10 way P9 card edge type plug (plugs into J9) pins 9 and 10 just a few inches behind. Attached Thumbnails

5th Dec 2021, 12:22 am	#6
Entangler Diode Join Date: Apr 2021 Location: Regina, Saskatchewan, Canada Posts: 5	Re: Connecting Record/Erase head wires Akai GX210d PERFECT! Thanks all…will resolder and reassemble!!