I did something very bad...

I had been working diligently on an old Teac 2300 reel deck I acquired and with the wonderful help on this forum had been making excellent progress. Everything was getting cleaned, lubed and put back into tip-top shape.

Then I got careless. I left the power cord plugged in after a test and shorted something. There was a spark, there was smoke, there was that sinking feeling that something bad had happened.

I can no longer get any output. The VU meters do not move during playback or record. Is there any hope or is my Teac ready to be used as an anchor out on Lake Erie?

Sorry to hear that.... :worried:
Can you see where the damage are ?

The board that was smoking is the board that is mounted on the right side panel (as seen when facing the unit from the back). Here is a picture showing the board and one of the components that gets extremely hot when the unit is powered-up.

http://i8.photobucket.com/albums/a44/Frink1234/Hot.jpg

Sorry to hear that.
The good news is that mostly anything can be repaired. Don't give up just yet. Besides the meters, are you getting output through the headphones?
Ron

Thanks for the encouragement - I needed that. Here's where I'm at: No output through either the headphone jack or the line out jacks. Mic in and Line in during recording does not appear to do anything either. What next?

Well I can clearly see what's wrong with it - the rest of the components haven't been soldered on the board yet!! :lmao:

Do you hear the relay click and the record light light when you press Record? Does the transport fully work? Also try this. If you have another R2R, record on the 2300 and play back on the other machine.
If you can get the schematic, it would be a great help. Trace the foil from the overheated resistor. There seem to be 2 diodes next to the resistor in your picture. Check those for a shorted condition. Again, the schematic is a must to find the common point between the meters, record and play circuits. The short is somewhere in that area.
What did you have connected or touched when the short occured?
Ron

The motors, transports, relays and solenoids all work perfect (I had just finished cleaning and lubing them!) The record light does come on when I try to record. I do have a Sony R2R and tried as you suggested but no luck. The Teac will not play back a tape recorded on the Sony and playback on the Sony from the Teac produces no sound. The diodes you mentioned look fine. In fact, other than that resistor getting REALLY HOT, I can't find any damage on any of the circuit boards. I am trying to locate a schematic. I may have to pull off the side panel to get a better look at the board with the overheating resistor. I would love to get this baby humming!

Is it the Teac 2300, 2300S or A-2300? You took the head cover off. That's where the model number is located as well as on the rear. I can get the service manual from the people I buy semiconductors from.
That board looks like it may be the power supply, judging from the large capacitors. Do any of the components on that board smell burnt? You can't judge their condition by eye, you'll have to measure each component.
If you don't mind shipping the unit, I can repair it for you.
Ron

That is the Rectifier Board 50491033 and it looks like that resistor is toast and I would not count out a few of the diodes went too. I would check all component's on the board. I have the A-2300SX service manual on CD if you would like a copy the 2300 2300s and 2300sx share the same boards.

Ron

It's the Teac 2300S. I definitely smell that "burnt component smell" coming from the board with the toasted resistor. I'm OK with mechanical repairs, but I'm not sure about doing work on the circuit board. I guess it's a chance to learn something new - but I don't know if this is the best project to try and tackle myself. I'd have to go out and buy a multimeter (and learn how to use it).

Welcome to the world of Vintage Audio. I have had to fix every one of the 6 decks I have only because they were given to me by a friend and fellow AKer. I have (3) 2300SX's (2) 2300S's and a 3300S if you need any help you came to the right spot.

Ron

I'm leaving town for a few days and when I get back I'll try and figure-out what I want to do. As I see it right now I can:
1. Obtain the schematics and a multimeter and probably a few other assorted tools I may not have and try to tackle this repair with help from AKers.
2. Send unit to JBLMar (or somewhere) for repair.
3. Try and find another one on eBay - maybe a fixer-upper that I won't fry this time.
Obviously number one is the hardest (and ultimately most gratifying if successful, but also possibly the most frustrating and stressful! )
I was wondering if it would be possible to find someone with a non-working TEAC and just swap-out that whole rectiifier board. Whadya think? Yes, I have used a soldering iron and even own one. No, I do not have a de-soldering device and I've never worked on a circuit board. I don't know if the hand-holding step-by-step instructions you can give me here will suffice and how much additional equipment (besides the multimeter) I will need to diagnose and repair. Any advice?

It's possible to swap out a new board. The problem is that there may be more damage futher down the line. Futher testing is necessary.
You'll need:
1) A DMM with diode test function for checking transistors and diodes.
2) A tone generator to check frequency response and troubleshoot.
3) An oscilloscope to trouble shoot and use with 2) to check for distortion and channel balance.

I hope this helps. Don't think about it for a few days. As I've stated before, just about anything is repairable. This is not a fatal problem. Teac is great when it comes to parts. Your machine is very repairable and worth the effort.
Ron

Hi Frink1234!

I think I got your old TEAC off of Ebay! Plugged it in, and the motors run nice, solenoids and transport seem good, but no VU movement, no sound from lines out or phones, 'sigh' The quest for a nice RTR continues.

Alas, there are probably several of those out there but you don't have mine. It's making a nice home for some spiders that live in my basement. :p: A friend of mine said he could fix it for me one of these days so I'm holding on to it for now.

My quest will now change direction, for an A-2300 that produces output, but the transports shot. Maybe between the two, I'll get something to work!!

:banana: :banana: :banana:

:thmbsp: Yippee!! OK, so I FINALLY got my Teac into the hands of my good buddy who has quite a few vintage R2R's (Teac, Revox, Sony, etc) and he was able to quickly diagnosis and fix my baby! Evidently, when I removed a small circuit board (I think it was to get better access to free the pinch roller) I must have misplaced or lost a small insulator that went between the screw and the circuit board. So when I screwed the circuit board back onto the post I grounded it out. Once he unscrewed the board, bingo, everything works perfectly. So he is going to just put in a new insulator and I get my baby back only 18 months after I started this thread! This does mean however, that I have an extra 2300S that I may be putting up for sale. It's missing a volume knob and pinch roller, and the pinch roller sticks, but otherwise works fine.

KB, I listed a really nice 4010GSL Teac on AK to benefit the new server fund....I know you would love it.....She's a keeper.....

Another happy ending. :thmbsp:

That was good news, better late then never.:tresbon:

I just found this thread and busted (dusted?) out my copy of the teac a-2300s service manual. Then I kept on reading, and noticed the date..

The 2300s were the basis for some professional high speed tape duplicators I worked on in the factory in the late mid 70's.... just before I became a Pioneer dealer tech... I recognized the b+ short... and the frying R6 3.3 ohm 2 watt resistor... oh well.....

Hi, I'm new here but old on the homerecording.com boards (under hungovermorning). This is a longshot, but there were a couple mentions of a digital version of the manual for the TEAC A-2300sx and I was wondering if it would be at all possible to get a copy. Please either PM me or email me at hungovermorning@hotmail.com I bought this a couple weeks ago (never shoulda sold my king Akai!) Thanks!

I did something very bad...

I had been working diligently on an old Teac 2300 reel deck I acquired and with the wonderful help on this forum had been making excellent progress. Everything was getting cleaned, lubed and put back into tip-top shape.

Then I got careless. I left the power cord plugged in after a test and shorted something. There was a spark, there was smoke, there was that sinking feeling that something bad had happened.

I can no longer get any output. The VU meters do not move during playback or record. Is there any hope or is my Teac ready to be used as an anchor out on Lake Erie?

It works. One playback head is shot. One channel. You are welcome to any parts--free. I have a working 2300 and 1230. Used the feet and several cosmetic pieces but its whole.

Eric:music:

:thmbsp: Yippee!! OK, so I FINALLY got my Teac into the hands of my good buddy who has quite a few vintage R2R's (Teac, Revox, Sony, etc) and he was able to quickly diagnosis and fix my baby! Evidently, when I removed a small circuit board (I think it was to get better access to free the pinch roller) I must have misplaced or lost a small insulator that went between the screw and the circuit board. So when I screwed the circuit board back onto the post I grounded it out. Once he unscrewed the board, bingo, everything works perfectly. So he is going to just put in a new insulator and I get my baby back only 18 months after I started this thread! This does mean however, that I have an extra 2300S that I may be putting up for sale. It's missing a volume knob and pinch roller, and the pinch roller sticks, but otherwise works fine.

not perfect pinch roller,has a small flat spot but plays fine. Can have the volume knob too. Email if you want it..Eric