Products > Test Equipment

TC1 lcr-meter transistor-tester fix

<< < (11/80) > >>

madires:

--- Quote from: Geert on March 04, 2020, 09:02:54 pm ---Is there a newer firmware available for the TC1 ?
My tester has version 2.12k

--- End quote ---

That's a modified k-firmware (modified by the manufacturer). I don't know if there's a newer version, but I'd recommend to upgrade to the OSHW firmware (k or m). And don't forget to reprogram U4 (https://github.com/atar-axis/tc1-u4) or replace it with a small circuit (https://github.com/madires/Transistortester-Warehouse/blob/master/Hardware/TC1-Mod.kicad.tgz).

ceut:

--- Quote from: Mechatrommer on October 07, 2018, 06:06:05 pm ---i bought this TC1 unit with expectation it is the same as M328 variant that i bought and worked charmingly earlier, but now my brother is using it now so i have to buy for myself. it turn out this is different atMega324 with STC15W104 chip, this turn out to be nightmare. and then i found this thread. after back and forth reading this thread i managed to get something from STC-ISP...

--- Quote ---Checking target MCU ...
  MCU type: STC15W104
  F/W version: 7.2.5T

Current H/W Option:
  . Current system clock source is internal IRC oscillator
  . IRC frequency: 32.975MHz
  . Wakeup Timer frequency: 36.825KHz
  . Do not detect the level of P3.2 and P3.3 next download
  . Power-on reset, use the extra power-on delay
  . RESET pin behaves as I/O pin
  . Reset while detect a Low-Voltage
  . Thresh voltage level of the built-in LVD : 2.66 V
  . Inhibit EEPROM operation under Low-Voltage
  . CPU-Core supply level : 3.74 V
  . Hardware do not enable Watch-Dog-Timer
  . Watch-Dog-Timer pre-scalar : 256
  . Watch-Dog-Timer stop count in idle mode
  . Program can modify the Watch-Dog-Timer scalar
  . Do not erase user EEPROM area at next download
  . Do not control 485 at next download
  . Do not check user password next download
  . TXD is independent IO
  . TXD pin as quasi-bidirectional mode after reset
  . P3.3 output HIGH level after reset
  . Testing time: 2017-9-22

  . MCU type: STC15W104
  F/W version: 7.2.5T


  Complete !(2018-10-08 01:17:05)

--- End quote ---
if i choose STC15L104W as demonstrated by earlier experimenters, i wont get any report from the chip.

the problem when i got this unit is the shorted C11, so i changed with 100nF, no more short, but when battery is applied, lcd turn on white for half a second or so and then random garbage before turned off immediately. pressing start button do nothing. sometime the tester did turned on and firmware on mega324 did start, but its just luck. after reprogramming STC15W104 with frodo's tc1_u4_v0.3.1.hex, now its totally blank. removing and applying battery, there is no more white screen, no start button respond nothing. ah F the STC chip what was that? support us people of China guaranteed powerful home grown business FU so much so for anti disturbance super strong chip.

earlier i removed the STC chip and connect Vbat pin to the next pin controlling the boost dcdc chip (AL673 marking), the atmega did start but halted at welcome screen its like waiting for signal on either P3.3/PD2 or P3.2/PD1 i suspect to start measurement. i have to experiment later. i think i will remove the STC chip and glue it to blank space on the pcb so it can wave dick all day long all its like. i need to find a way to start the atmega chip the hard way. or anybody else can help me make program for the STC15W104 chip? i will be gratefull, for now i dont have time to play/install with Keil or whatever. i just want it to work and then move on.

btw,
1st picture: thermal imaging superimposed when shorted C11 is installed. the SD6271 got hot 73degC as registered by my camera.
2nd picture: how i connect the STC15W104 to USB-UART converter. need few experiment though since warning from people to use 3.3V rail, 5V may damage the fucked up super strong STC. it turned out i just use 5V UART and it just worked fine.
3rd picture: the fucked up super strong anti disturbance STC15W104 chip made home grown in China, please support it people of China. i really pissed off can you imagine by now?

thanks to people directly or indirectly contributed to this thread esp OP zappenduster, frodo and others, but your FW doesnt work with mine :'( and schematics providers indman and azure.
edit: added 4th picture with its IO state to PD1/PD2 from my crude test.. and the mega fw wont start by simply toggling PD1 pin, so there must be the right sequence to turn it on |O

--- End quote ---

Hello,
I have exactly the same problem on my brand new LCR TC1 (DOA).
No power on, only charging, and 22mA of continous current draining from the battery .
There is no voltage on the switch when not pushed (pin1 of U4), and it seems that it's U4 who drains that 22mA, so I think that U4 is blank or something like that.
But don't know how to flash it...

No problem on capacitors C11/12 but I have changed them to a 15µF/100V
No problem on diode array,   neither on zener.

Someone has succeed to fix similar problem ?

Thanks !

ceut:
So with only the U4 with only the power pin only on it (PIN2 Vcc and PIN4 GND), I have my "famous" 22mA continous draining.

I don't know why they use a MCU for power managing but it seems to be a bad MCU.

Also I don't know how to bypass this to power on all.

I have tried to apply +5V on the Atmel and I have the boot logo on screen, but nothing else, seems to wait for something and I think it's a link with this bad MCU.

ceut:
I have reflashed the STC with the 0.31 hex and a modded USB serial adapter: no more 22mA draining from it, and it starts when press switch, but freeze on the boot logo.

I think I have to find another Atmel firmware to solve my problem.

So it was really a Dead On Arrival: the STC was flashed with something corrupted or wrong flash.
(After emailing and uploaded a video for them, the store where I bought it send me a new one, but wait again for about 3 weeks).


ceut:
Final words from me: I have flashed the Markus 1.34, and it's working, but I'm not a big fan of it  :-[
I think I will not use it, and waits for the new one.

Hope that someone will find and post the "famous" original STC firmware then we can put the original graphical firmware  8)

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod