|
09-04-2009, 09:29 PM
| #1 |
| Junior Member Join Date: May 2009
Posts: 9
| Crate Limo TX50D schematic
Does anybody have a schematic for a Crate Limo model TX50D. I have a broken one. I got a few bits and pieces from Loud Tech. I have the Pwr Supply, Mic Input Board, and DSP Board but no main board. Also the docs I have say TX50a. Loud said that was all they had and they lost a lot of stuff from the SLM archive. Thanks in advance. -Feves |
|  |
| ...and now, a word from our sponsor: |
| |
|
09-05-2009, 04:37 AM
| #2 |
| Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA
Posts: 10,366
|
The service disc is rather spotty on this. Here is a more complete file on the TX50a, see if it helps. Just what part are you working on?
__________________ Education is what you're left with after you have forgotten what you have learned. |
|
| |
|
09-05-2009, 05:30 AM
| #3 |
| Junior Member Join Date: May 2009
Posts: 9
|
The amp failed after the 15vdc wall wart was plugged into the 12vdc car adapter input. Amp would power up and make a few small pops and the LED would light brightly at first and then dim down to a faint glow. The amp would have no sound. I found that one of the opamps was bad when I tried it in a known good circuit. The others were fine. It was a 5534 that was bad. I didn't have another on hand so I replaced with TL082. Amp still does not work but now it oscillates when powered up. I suspect the power amp IC is bad as it's data sheet says it's max supply is 18vdc and the 15v wall wart puts out over 20vdc with no load. Thought I would check the schematic to see if it might be something else. Diodes on the main board look good. Thanks for your help. Will post updates as I look into this one more tommorrow. -Feves |
|
| |
|
09-22-2009, 07:25 PM
| #4 |
| Junior Member Join Date: May 2009
Posts: 9
|
I pulled the power amp IC out and everything looks good the power LED changes from Red to Yellow instead of blinking red and I get signal on the scope all the way to the power amp IC pin 1. However, when I replaced the power amp IC it is still not working. Back to where it was. Any ideas? I was VERY careful not to give it too much heat when I put it in. The replacement is TDA1562QCD that I ordered from Digikey not sure the make. The original is just TDA1562Q made by Phillips Thanks, feves |
|
| |
 |
| Bookmarks |
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
| |
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Need Crate CR60 schematic | mnow | Schematic Requests | 1 | 08-13-2009 11:46 PM |
| Crate BV120H schematic please! | walthur | Schematic Requests | 1 | 04-23-2009 12:58 AM |
| Schematic for a Crate FXT120 | HarryB | Schematic Requests | 4 | 01-25-2009 06:13 PM |
| Crate schematic | Valvehead | Maintenance, Troubleshooting & Repair | 1 | 12-18-2007 08:40 PM |
| Need schematic for Crate FXT120 | fixitrightthefirsttime | Maintenance, Troubleshooting & Repair | 6 | 05-24-2007 02:57 AM |
Linear Mode
