Guest
On Friday, May 12, 2017 at 8:51:25 PM UTC-4, Phil Allison wrote:
You do what you have to do to live Phil. A lot of the boards I work on are for consumer level TV, and with the price erosion of the last few years, I can't afford to pay more for a board than a customer is willing to spend in total for a repair. I can replace an AS15F gamma IC on an LCD TCON board in 10 minutes tops, and you'd have to look *very* carefully to see that it was replaced. I buy them 50 at a shot out of China for less than 0.50 each.
There are some boards that defy repair and those need to be replaced, but they are usually a break even deal at best, so we do whatever we can to avoid replacements.
True. No schematics, no .bin files, no help. But we adapt by utilizing the datasheets for the ICs on the boards. Fortunately, manufacturers no longer deface ICs and/or put house numbers on them, so using the "typical" circuit topology provided by the chip maker goes a long way in replacing the missing schematic.
Every main board that has a 25 series eeprom gets the .bin file removed, read, and stored on my computer (and backed up to half a dozen flash drives). A lot of main boards just have corrupted firmware, and I can pull an eeprom, reprogram it, and get it back on the board in 10 minutes.
I love getting guitar amps in because the guys want them back right away and don't care a lot about cost. It's nice to work on parts that I don't need to wear opti-visors to repair.
I do the occasional "antique" tube radio because it's a lot of fun to bring these old timers back to life.
dansabr...@yahoo.com wrote:
** Not the point.
Faulty SMD boards are replaced, not repaired, cos the latter is normally too expensive or impossible to do.
You do what you have to do to live Phil. A lot of the boards I work on are for consumer level TV, and with the price erosion of the last few years, I can't afford to pay more for a board than a customer is willing to spend in total for a repair. I can replace an AS15F gamma IC on an LCD TCON board in 10 minutes tops, and you'd have to look *very* carefully to see that it was replaced. I buy them 50 at a shot out of China for less than 0.50 each.
There are some boards that defy repair and those need to be replaced, but they are usually a break even deal at best, so we do whatever we can to avoid replacements.
In the real world, the manufacturer is in China and supplies no help at all.
.... Phil
True. No schematics, no .bin files, no help. But we adapt by utilizing the datasheets for the ICs on the boards. Fortunately, manufacturers no longer deface ICs and/or put house numbers on them, so using the "typical" circuit topology provided by the chip maker goes a long way in replacing the missing schematic.
Every main board that has a 25 series eeprom gets the .bin file removed, read, and stored on my computer (and backed up to half a dozen flash drives). A lot of main boards just have corrupted firmware, and I can pull an eeprom, reprogram it, and get it back on the board in 10 minutes.
I love getting guitar amps in because the guys want them back right away and don't care a lot about cost. It's nice to work on parts that I don't need to wear opti-visors to repair.
I do the occasional "antique" tube radio because it's a lot of fun to bring these old timers back to life.