On-Line #01 02 сентября 1995

Модем     Доработки     Железо

Iron - CDOS-modem may work better. (Revision)

                 IRON


        CDOS-modem may work better
        ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 
■ ■ ■  I welcome all users CDOS-modem. Leave this one hundred 
Tew I decided after tired to explain over the phone: that  need 
to do to the modem to accept files without a "seizure." 

 It all started with the fact that my modem, having served 
faithfully  a year, suddenly ceased to take more than one file 
at a time  (Zaraza!). Buying a new nothing has given (the same 
effect). Then  I picked up the tester, poyalnik, tweezers, a 
hammer, chisel ...  To gather his thoughts, and began to 
experiment over a modem. 

 LED "reception" (the first from the corner, the last of the 
transformer pa) was burning, even when there is no signal. All 
attempts to cut  high-frequency signal through capacitors do 
not give good  results (the modem was working fine, but took 
ill).  And then I tried to change the resistance to lifting UD2B

 zero (5 foot UD2B): The LED is off, the modem has to take
 normal. The direction of modernization has been received, and 
I vypayal  two resistance R1 and R2, replacing them with a 
variable resistor R3  (See Fig.)




                          In 5
                          D
                          2



              555LL1 R1