scx 3405F Image Error please reset printer

[iohan]

режим загрузки или принудительном режиме не представляется возможным 3405F?

download mode,  enforcing mode ?

[Aleksey Mo-skin]

DEBUG CABLE ONLY

[iohan]

где паять связано отладки кабель Tx, Rx, GND на принтере борту? Hyperterminal команды такие же, как для SCX 3400, здесь
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спасибо

[johnny_computers]

?? ?? ? ?? . ?? ? ? Tx, Rx, GND; ?? ??

[вложение удалено администратором]

[iohan]

пожалуйста, помогите. У меня есть проблема.
Я припаять перемычку ( рисунок 4 )
Я подключил USB-TTL преобразователь на материнской плате принтера Tx, Rx, Gnd. рисунок 1
Я начал гипер терминал (рисунок 2)
Hyper Terminal ошибки Unable to open COM*. PLease check your port settings. (рисунок 3)

В чем проблема? где я не прав? что я сделал неправильно?
спасибо

[вложение удалено администратором]

[apopovv]

Your usb-to-ttl converter must be work without connection to the printer.

Install driver (for USB)
Run HyperTerminal (COM = new COM from usb device) - 115200, 8, no, 1, no
Hyper - running

Test - type letters. See on terminal. Short RX and TX - type letters - look at terminal again.
Reaction of response should be different.

After succes test - connect to the pinter.

[iohan]

3405F
USB converter is installed.
hyperterminal run without connecting the printer (only usb-ttl converter).
show "connected" as shown in Figure 1


when pushbutton "ENTER" once one of the lights flashing rapidly.
where to write "Test" and "Short RX and TX". ? Hyperterminal does not allow me to write anything.
is a problem if USB extension 1 meter length? (picture 2)

please help

[apopovv]

test converter: write any letter (symbol) from keyboard. terminal no answer
short, connect TX fnd RX pin on converter
again write any symbol from keyboard - terminal must be answer same symbol.

it work ?

[iohan]

does not allow me to write anything.
need to change settings here? image

[вложение удалено администратором]

[iohan]

before solder jumpers not display this error (unable to oper COM8. PLEASE check your port settings). should or should not soldered jumper?

[вложение удалено администратором]

[iohan]

test converter: write any letter (symbol) from keyboard. terminal no answer
short, connect TX fnd RX pin on converter
again write any symbol from keyboard - terminal must be answer same symbol.

it work ?

I've been trying, and you can see in the picture, which appeared
. I typed TESTTEST, and wrote these symbols

[вложение удалено администратором]

[apopovv]

Use short wire (10-15 cm) from converter to printer
Try 38400 or 56700 speed.

[iohan]

I shortened the wires (5 cm) and I weld again.
I tried 38400 and 57600 speed but same error (unable to open COM8. Please check your port settings
. please help.
  this printer is killing me

[apopovv]

You connected to printer 3 wire ?

- RX
- TX
- GND

?

[Nikita]

I shortened the wires (5 cm) and I weld again.
I tried 38400 and 57600 speed but same error (unable to open COM8. Please check your port settings
. please help.
  this printer is killing me

если не можешь открыть порт то сначала включи принтер потом нажми вызов