Icom IC-725 Service Manual page 6

• PA AND FILTER UNITS
Tx/Rx switching relay-----;;.-=:-;;-
(RL 13: DS1-M-DC12V)
- - - - - - - - P r e d r i v e amplifier
(01: 2SC1971)
~----Drive amplifier
(02, 03: 2SC3133)
'=+----Final amplifier
(05, 06: 2SC2904)
-'------Thermal switch
(81: OHD-3 90M)
2-2