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#1 |
Leaking Member
Join Date: Dec 2014
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![]() Some Got it as a X-Mas present from wifey. Lasted about 30mins and then it was absolutely dead.
![]() Checked the PSU and it was loaded down to next to nothing. Unplugged the main board from the PSU and all is O.k. on the PSU. Ahh! Main board problem! ![]() Took the main board out and find a short at T2 (78L05) regulator between the input and GND pin. Took that out including the cap that is next to it and still have a short. I also measured shorts between C53 and C57. Took these out, took the 2 IC's under that heat sink out and still a short! ![]() ![]() So in short: If you have a Feeltech / Kuman FY6600 that doesn't work and the PSU is good, check C81 on the main board. It is under that little heat sink that is on top of of the 2 IC's. Merry X-Mas! |
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#2 |
Solder Sloth
Join Date: Nov 2012
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![]() Was that heatsink specifically for those two ICs? Weird... expecting a SOIC8 and SOP8 to dissipate that much heat is not a good sign...?
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#3 |
Leaking Member
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![]() Yes. The funny thing is that the heat sink only covers the both IC's only to 75% and there was no thermal paste either.
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#4 |
Leaking Member
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![]() I decided to open her up again and read the Winbond 25Q16JV SPI flash.
https://www.eevblog.com/forum/repair...nal-generator/ My firmware version is 3.2.1 Enjoy! ![]() Last edited by CapLeaker; 02-23-2019 at 05:07 PM.. |
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#5 |
Leaking Member
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![]() ... forgot the schematics to that thing.
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#6 |
Leaking Member
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![]() Now I have to figure out how to read the STM32 in the head unit. That is where the actual firmware is. The stuff on the Winbond doesn't look like firmware.
Did anyone try to copy and flash an STM32 before? |
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#7 | |
Badcaps Veteran
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![]() Quote:
This was very interesting reading I enjoyed it Thanks for sharing this
__________________
9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had ![]() All of the mosfet that are taken out by bad caps ![]() |
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#8 |
Leaking Member
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![]() Yeah, that old trick saved my butt a few times.
I've managed to get the 3.3 firmware, some .FYbi file for the STM32 from the manufacturer. Now I have to figure out how to update that Function Generator. |
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#9 |
Great Sage 齊天大聖
Join Date: Dec 2009
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![]() ask your source, stlink / serial uses HEX files.
they may have written a special bootloader - possibly using the usb port. |
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#10 | |
Leaking Member
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![]() Quote:
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#11 |
Leaking Member
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![]() This is supposed to be the version 3.3 firmware for the STM32 on the FY6600 that I've managed to download from FeelTech.
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#12 |
Great Sage 齊天大聖
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![]() that's encrypted binary with a custom header.
install the pc remote-control software and see if it has an upgrade option in it somewhere. |
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#13 |
Leaking Member
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![]() Back to this puppy. Had to grab an old windblows machine and really install that software. Nope, you can't upgrade the Firmware through the PC-software v. 5.5 and that is the latest. Maybe I'll try the software from the newer FY-6800 later on and see what that does.
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#14 | |
New Member
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![]() Quote:
Thank you, |
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#15 |
Leaking Member
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![]() yours has a different problem than mine had. Mine was totally dead, as one of the voltage rails was shorted to GND. Not sure what problem yours has. Maybe give it a good visual under the microscope. Check all the voltage rails, 12, 5, 3.3, 1.2V. There is a TTL, maybe read it out.
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