FeelTech FY-6600 Corrupted Flash Repair

[rhb]

This thread summarizes information related  the threads in T&M.  The V 3.0 and V 3.1 units have a defect which corrupts memory to the point of being inoperable.  This is an attempt to correct the problem.  FeelTech appears to be unwilling  provide any support for owners of defective product.  Many promises of "lifetime warranty" have been made, but no actual repair or replacements are known. It is *believed* that V 3.2 and later are OK, but there is little data to confirm that.

Abbreviations:

FP - front panel
RP - rear panel
SB - signal board
PS - power supply

Connectors:

SB J8 <--> PS  connector   [ -11.4 V | 11.4 V | Gnd | Gnd | 5.0 V | 5.0  V ]

FP FS1 <--> 8 bit FP-SB bus   [ ? | Gnd | ? | ? | CS/SS | CLK | MISO | MOSI ]   3.5 V CMOS

FP J1 <-->  4 bit FP-SB/RP bus  [ 5 V | Gnd | Txd | Rxd ]  RS-232


Major Devices:

FP MCU  STM32F103C8T6  [  LQFP48 | 128 KB flash | 20 KB RAM  | -40 - 85 C ]

www.st.com/resource/en/datasheet/stm32f103tb.pdf

SB FPGA Altera Cyclone IV  EP4CE6  [ 6272 LEs | 270 Kbit  memory |  15  - 18 x 18 multipliers | 2 PLLs | 10 Global clock networks | 8 user I/O banks | 179 max I/O ]

https://www.altera.com/en_US/pdfs/literature/hb/cyclone-iv/cyiv-51001.pdf

As more data becomes available I shall update this post.