TEAC 8-08 Tascam 8 track reel to reel no record - UK Vintage Radio Repair and Restoration Discussion Forum

Biggles · 26th Apr 2017, 9:55 pm

Hi all, a friend has dropped this machine off tonight for repair. Apparently the machine plays back fine and the transport is ok but there is no record on any of the eight channels, although the VU meters show record signal. I have not done a functional check yet but was wondering if anyone has a circuit for this machine, or know where to find one. Thanks in advance.
Alan.

ITAM805 · 26th Apr 2017, 10:13 pm

try Tanya

Biggles · 27th Apr 2017, 8:52 pm

Thanks for that ITAM.

Diabolical Artificer · 29th Apr 2017, 6:42 am

Manual here - https://www.hifiengine.com/manual_li...eac/80-8.shtml The 80-8 has 8 amplifier cards that are accessed via the bottom panel. Each has three relays for switching the signals. The relays used were made by NEC and are known to go OC. I have some amplifier cards out of the Tascam 38 that may have the same relays on if you get stuck for spares. Oh, there's a Rifa cap on the on/off switch that will wanting changing if it hasn't gone already.

You can still get some of the logic IC's from the USA, though some are very hard to find.

There's a couple of good Tascam/Teac forums online, one on a reel to reel/recording forum. just had a look in my bookmarks but can't find them.

Hope that helps, Andy.

jamesperrett · 2nd May 2017, 12:26 pm

It may also be worth looking up Sam Palermo from Skywave Services in the US as he tends to be a good source of information on old Teac/Tascam gear.

EMI BTR 3 · 16th May 2017, 1:31 am

I understand it's now a known problem with the 80-8 that several capacitors in the master bias oscillator are bad by now, and require replacement, so it would be wise to check those as well.

ricard · 16th May 2017, 5:37 am

Yes, it would seem that if recording all eight channels has failed at the same time, the culprit is likely to be some common component, such as the bias oscillator.

26th Apr 2017, 9:55 pm	#1
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	TEAC 8-08 Tascam 8 track reel to reel no record Hi all, a friend has dropped this machine off tonight for repair. Apparently the machine plays back fine and the transport is ok but there is no record on any of the eight channels, although the VU meters show record signal. I have not done a functional check yet but was wondering if anyone has a circuit for this machine, or know where to find one. Thanks in advance. Alan.

26th Apr 2017, 10:13 pm	#2
ITAM805 Nonode Join Date: Jul 2010 Location: Folkestone, Kent, UK. Posts: 2,172	Re: TEAC 8-08 Tascam 8 track reel to reel no record try Tanya

27th Apr 2017, 8:52 pm	#3
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	Re: TEAC 8-08 Tascam 8 track reel to reel no record Thanks for that ITAM.

29th Apr 2017, 6:42 am	#4
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,662	Re: TEAC 8-08 Tascam 8 track reel to reel no record Manual here - https://www.hifiengine.com/manual_li...eac/80-8.shtml The 80-8 has 8 amplifier cards that are accessed via the bottom panel. Each has three relays for switching the signals. The relays used were made by NEC and are known to go OC. I have some amplifier cards out of the Tascam 38 that may have the same relays on if you get stuck for spares. Oh, there's a Rifa cap on the on/off switch that will wanting changing if it hasn't gone already. You can still get some of the logic IC's from the USA, though some are very hard to find. There's a couple of good Tascam/Teac forums online, one on a reel to reel/recording forum. just had a look in my bookmarks but can't find them. Hope that helps, Andy. __________________ Curiosity hasn't killed this cat...so far.

2nd May 2017, 12:26 pm	#5
jamesperrett Octode Join Date: May 2007 Location: Liss, Hampshire, UK. Posts: 1,873	Re: TEAC 8-08 Tascam 8 track reel to reel no record It may also be worth looking up Sam Palermo from Skywave Services in the US as he tends to be a good source of information on old Teac/Tascam gear.

16th May 2017, 1:31 am	#6
EMI BTR 3 Tetrode Join Date: May 2010 Location: Mountain Home, Arkansas, USA. Posts: 68	Re: TEAC 8-08 Tascam 8 track reel to reel no record I understand it's now a known problem with the 80-8 that several capacitors in the master bias oscillator are bad by now, and require replacement, so it would be wise to check those as well.

16th May 2017, 5:37 am	#7
ricard Octode Join Date: Mar 2006 Location: Lund, Sweden Posts: 1,632	Re: TEAC 8-08 Tascam 8 track reel to reel no record Yes, it would seem that if recording all eight channels has failed at the same time, the culprit is likely to be some common component, such as the bias oscillator.