EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: rhb on January 24, 2018, 06:41:44 pm
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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 (http://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 (https://www.altera.com/en_US/pdfs/literature/hb/cyclone-iv/cyiv-51001.pdf)
As more data becomes available I shall update this post.