| Author |
Message |
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Wed Mar 13, 2013 4:01 am Post subject: Biggest recapping ever |
|
|
Check this out. I just spent 12 hours recapping 12 channels of this 24 channel Fostex reel to reel. Quoted the customer $100 per channel, and he only wanted 10 repaired. I've recapped 12 channels, but ran out of caps on the last two, so I'll let him know those are only 1/2 done. He only wanted 10 recapped anyway. I also removed leaky caps off the remaining boards so they don't cause damage.
Seems like this is a very common problem in these G24 Fostex's. Not many around, this is the second one I've seen, but I guess the electronics run really hot with all the boards stacked next to each other the way they are.
Funny thing was, after I recapped the boards, only 3 channels showed audio output on playback, although all passed audio from the line input to output. After scratching my head and doing some signal tracing, it seems that someone had gotten into the trimpots and turned the output ones to 0 for the playback. Then only 4 VU meters were working. Ditto for the meter gain controls. Bastards!
A good learning experience, as the G24S service manual that I got was very similar electrically, but almost all the components had different part numbers on it. That took 1/2 hour to figure out.
But.. it's up and running. Tomorrow I calibrate and collect my money.
| Description: |
|
| Filesize: |
141.27 KB |
| Viewed: |
7958 Time(s) |
|
| Description: |
|
| Filesize: |
144.42 KB |
| Viewed: |
7958 Time(s) |
|
| Description: |
|
| Filesize: |
151.01 KB |
| Viewed: |
7958 Time(s) |
|
| Description: |
| 24 channels crammed on top of each other |
|
| Filesize: |
152.85 KB |
| Viewed: |
7958 Time(s) |
|
| Description: |
| 1 preamp board, post recapping. Some caps are larger than the originals. |
|
| Filesize: |
151.52 KB |
| Viewed: |
7958 Time(s) |
|
|
|
| Back to top |
|
 |
HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
|
| Posted: Wed Mar 13, 2013 7:06 am Post subject: |
|
|
That is a long stretch behind the soldering iron, Nice job fixing the problems.
Do you have a fan or smoke extractor when soldering?
Cheers
_________________
|
|
| Back to top |
|
|
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Wed Mar 13, 2013 1:30 pm Post subject: |
|
|
Nope, I'm a prime candidate for lead poisoning/lung cancer. 
|
|
| Back to top |
|
|
draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
|
|
| Back to top |
|
|
Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
|
| Posted: Sat Mar 16, 2013 12:39 am Post subject: |
|
|
Open a window, that'll do it 
_________________
When I'm asking for a Model number, that doesn't mean I'm asking for a nude photo with your number on it 
|
|
| Back to top |
|
|
|
|
