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PDF IC-F520 Data sheet ( Hoja de datos )
| Número de pieza | IC-F520 | |
| Descripción | VHF TRANSCEIVER SERVICE MANUAL | |
| Fabricantes | Icom | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IC-F520 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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SERVICE
MANUAL
VHF TRANSCEIVER
iF510
iF520
iF521
1 page  
SECTION 2 INSIDE VIEW
Power module
IC3: RA30H1317 [25W]
RA60H1317M [50W]
8V regurator
(IC9: TA7808F)
AF amplifier
(IC8: LA4425A)
CPU 5V regurator*
(IC10: AN78L05M)
VCO circuit
CPU*
(IC20: HD64F2268TF)
PLL IC
(IC4: TB31256FL)
*Located under side of the point.
Antenna switch/
Low-pass filter circuits
1st mixer*
(Q3: 3SK272)
2nd IF filter
(FI2: ALFYM450F=K [N/W]
CFWLB450KGFA
-B0 [N/M])
FM IF IC
(IC1: TA31136FN)
D/A converter
(IC6: M62364FP)
Referance crystal osillator
(X2: CR-664A 15.3 MHz)
1st IF filter
(FI1: FL-335 46.35 MHz)
2-1
5 Page 
CPU (IC20)—continued
Pin Port
number name
Description
Input port for AF mute signal from the
32 RMUT optional board via J1.
Input port for MIC mute signal from the
33 MMUT optional board via J1.
34–36
OPT1– I/O ports for the optional board control
OPT3 signals.
NOIS signal input port from the FM IF
37 NOIS IC (MAIN unit; IC1) for noise squelch
operation.
38
POSW
Input for the POWER switch.
Low : While POWER switch is pushed.
Input port for DTMF detection signal
39 DDST from the DTMF decoder (IC19).
Remote power control signal input port
40 IGSW from the external connector (J8).
41
PWON
Outputs control signal for the power
switching circuit (Q24, Q23) via D28.
43 SENC Outputs single tone signal.
44 BEEP Outputs beep audio signals.
Single tone signal input port for decod-
45 SDEC ing from the LPF (IC21c).
CTCSS/DTCS signals input port for
46 CDEC decoding from the LPF (IC5).
47
ULCK
Input port for the PLL unlock signal
from the PLL IC (IC4).
Input port for the overvoltage detection
48 BATV from the connected power supply.
49 LVIN Input port for the PLL lock voltage.
Input port for receiving signal strength
50 RSSI level detection.
Input port for the transceiver’s internal
51 TEMP temperature.
Input port for the AF volume control
52 AFVI (FRONT unit; R12).
High : [VOL] is maximum clockwise.
Input port for the PTT switch from the
55 EPTT external connector (J6).
Low : External PTT switch is ON.
59 RES Input port for the reset signal.
68 CLO Output port for the cloning signal.
69 CLI Input port for the cloning signal.
70 CSFT Outputs CPU clock shift signal.
Outputs cut-off frequency control signal
71 DUSE to the low-pass filter (IC5) for
CTCSS/DTCS switching.
74
XCTS
Input port for the connected modem
unit via external connector (J9).
CPU (IC20)—continued
Pin Port
number name
Description
Output port for the connected modem
75 XRTS unit via external connector (J9).
Input port for serial data signals from
76 XTXD the connected MAP27 unit via external
connector (J9).
Outputs serial data signals for the con-
77 XRXD nected MAP27 unit via external con-
nector (J9).
Output serial data signals (data format
is in accordance with NMEA0183) for
79 NTXD the connected unit via external connec-
tor (J8).
Input port for serial data signals (data
80
NRXD
format is in accordance with
NMEA0183) from the connected unit
via external connector (J8).
Input port for interruption signal from
81 CIRQ the optional board via J1
Input port for the LCD backlight control
88 DIM signal from the external connector (J6).
89–91
CENC2– Output ports for the CTCSS/ DTCS sig-
CENC0 nals.
Outputs reset signal for the compander
92 AFCL IC (IC14).
94, AMSK, Output control signals for the compan-
95 ADIN der IC (IC14).
Outputs strobe signals to the compan-
96 APST der IC (IC14).
Outputs control signal for the MSK
97 PMFM PM/FM switching circuit (IC15).
98
ESDA
I/O port for the data signals from the
EEPROM (IC23).
Outputs clock signal for the EEPROM
99 ESCL (IC23).
Outputs MIC audio select signal for the
100
PA
analog switch (IC25).
Low : While “Public-address” function
is ON.
4-5
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet IC-F520.PDF ] | |
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