Adjustment Procedures; Preparation Before Servicing; Required Test Equipment; Connections - Icom IC-703 Service Manual

SECTION 4 ADJUSTMENT PROCEDURES

4-1 PREPARATION BEFORE SERVICING

I REQUIRED TEST EQUIPMENT
EQUIPMENT
Output voltage
DC power supply
Current capacity
Measuring range
Frequency range
RF power meter
(terminated type) Impedance
SWR
Frequency range
Frequency counter Frequency accuracy
Sensitivity
Frequency range
RF voltmeter
Measuring range
Standard signal Frequency range
generator (SSG) Output level
Frequency range
FM deviation meter
Measuring range
Frequency range
Modulation analyzer
Measuring range

' ' CONNECTIONS

Microphone connector
¥ (Rear panel view)
Pin 5
MIC GND
Pin 6
MIC INPUT
1 8
Pin 7
GND
DC power supply
AA13.8 V/3 A
Keyer
GREDE AND RANGE
: 13.8 V DC
: 5 A or more
: 0.1–50 W
: 1.8–100 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–100 MHz
: ±1 ppm or better
: 100 mV or better
: 0.1–100 MHz
: 0.01–10 V
: 0.1–100 MHz
: 0.1 µV–32 mV
(–127 to –17 dBm)
: 0–100 MHz
: 0 to ±5 kHz
: At least 100 MHz
: 0–100 %
—
Audio
+
generator
to [MIC]
Pin 4
PTT
to [DC 13.8 V]
AM meter
1 A, 10 A
to [ELEC KEY]
EQUIPMENT
Distortion meter
Oscilloscope
Digital multimeter
AC millivoltmeter
DC voltmeter
DC ammeter
Audio generator
Spectram analyzer
Attenuator
External speaker
to [EXT SP]
to [ANT]
i703
4 - 1
GREDE AND RENGE
Frequency range : 1 kHz ±10 %
Measuring range : 1–100 %
Frequency range : DC–100 MHz
Measuring range : 0.01–10 V
Imput impeadance : 10 MΩ/DC or beter
Measuring range : 10 mV–10 V
Input impedance : 50 kΩ/V DC or better
Measurement capability: 1 A/50 A
Frequency range : 300–3000 Hz
Measuring range : 1–500 mV
Frequency range : At least 1000 MHz
Spectraum bandwidth : 100 kHz or more
Power attenuation : 50 or 60 dB
Capacity : 150 W or more
: 8 Ω
Input impedance
Capacity : 5 W or more
AC
millivoltmeter
Speaker
Attenuator FM deviation
50 or 60 dB AAmeter
RF power meter
A200 W/50
Frequency counter
Standard signal
aagenerator
CAUTION:
DO NOT connect the
standard signal generator
while transmitting.
Spectrum
analyzer
Modulation
aanalyzer