FP520 Service Manual
Page 15 of 64
Q602
2SC5108
transmitter 1
st
amplification
Q603
2SC3356
transmitter 2rd amplification
Q604
DTA144EE
APC output switch
Q703
3SK318
receiver low noise amplifier
Q702
3SK318
the 1
st
level frequency mixer
Q701
2SC5108
the 1
st
intermediate frequency amplifier
Q700
2SC4617
receiver noise amplifier
Q800
FMMT717
audio output control switch
Q801
DTC144EE
audio power amplifier control switch
IC100
XC6204B502MR
adjustable 5C stable voltage output
IC100
XC6204B502MR
adjustable 5R stable voltage output
IC100
XC6204B502MR
adjustable 5T stable voltage output
IC102
XC6228D122VR
adjustable 1.8V voltage output
IC101
XC6204B332MR
adjustable 3V voltage output
Chart 3.5 Diode Function Description
Item
Item no.
Function Description
D309
DA2S10100L
losing lock detection diode
D310
DA2S10100L
VCO power filter accelerating diode
D304
1SV278
transmitter VCO modulation diode
D305,D306
D307,D308
HVC376
transmitter VCO oscillation variode
D300,D301
D302,D303
HVC376
receiver VCO oscillation variode
D402
HSC277
VCO output switch
D604
HZU5ALL
APC output voltage limiting diode
D600,D601
D602,D603
HVC131
transmitter antenna switch diode
D704,D705,D706,
D707,D708
HVC355B
receiver band pass filter and variode
D701
RB706F
communication diode
Summary of Contents for FP520
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Page 44: ...FP520 Service Manual Page 43 of 64 Figure 1 FP520 01 Mainboard Schematic Diagram 136 174MHz ...
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Page 54: ...FP520 Service Manual Page 53 of 64 Figure 4 FP520 02 Mainboard Schematic Diagram 400 470MHz ...
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Page 64: ...FP520 Service Manual Page 63 of 64 Figure 7 KBC 51 7 4V Electrical Schematic Diagram ...