Service Manual

XFIN-BLADE-SM
TECHNICAL DESCRIPTION PAGE 51
· RX mute switch Q810/813
· Multiplexer U902
· FE TUNE level translator and buffer U901A, Q900/901
Regulated +5.0V switched supply (TX PSU and TX PSU+)
· TX power control U3
· TX buffer Q606
· Microphone amplifier Q812
· Various switching functions
+3.3V Regulator U312
Regulated +3.3V supply (3N3)
· Digital supply for CODEC U800
· DSP U102
· FPGA U106
Regulated +3.3V supply (3Q3)
· I Q demodulator U401
Regulated +3.3V supply (3C3)
· Analogue supply for CODEC U800
Regulated +3.3V supply (3P3)
· PLL U701
· TCXO divider U702
Unregulated 13.8V (13V8 UNSW)
· TX PA module U2
· TX PA power control circuit Q3
· Active filter Q14/17/18/19
· Antenna changeover switch Q4/8/11
· RX mute switch Q811
· RX speaker amplifier U5
Negative Power Supply U300B/C
Provides -17.0V output (-17V0)
· Negative rail for VCO Varicap Negative Supply Q700, 701, 702 and Q703
-12.0V Output (-12V0)
· Negative rail for FE TUNE level translator Q900, 901, 902, 903 and
multiplexer U902