12. BLOCK DIAGRAM (Base Unit)
13. CIRCUIT OPERATION (Base Unit)
13.1. SP-PHONE RX Circuit
Circuit Operation:
Telephone Line (T/R) R139/R140 C139 C449 R448 C441 Q461 C442
R442 pin 38 of IC501 pins 32 and 33 of IC501 Speaker
13.2. SP-PHONE TX Circuit
Circuit Operation:
MIC C474 C475 C476 R476 pin 47 of IC501 pin 36 of IC501 R431 C432
C433 Telephone Line
60
To Next Page
Loading...
