Thanks for a very good and readable servicemanual. Just what I needed as a "dinosaur technician". I really recommmend this site and will come back.
Åsbjörn
Very pleased with manual except that a few more details in the drawings might make the job (not yet done, tut-tut) easier. Should be adequate though. Actually I didn't have to pay for this anyway as I was given credit for another item that wasn't quite complete. Good service, then.
Text excerpt from page 49 (click to view)
*When an intercom transmission is not in use, the waveform of (D) becomes the same burst signal as (C). 2. Data Reception The data that is transmitted to the telephone line from another set is input via T701 in reverse order of the data transmission (D). This burst signal passes BPF701 to separate from the audio signal and then only 455 kHz is extracted (E) at pin 5 of IC701. This burst signal is amplified and demodulated at pin 4 of IC701 (I). The amplified burst signal (J) is input to pin 32 of the microcomputer IC801.
