Adjustment Procedures; Preparation Before Servicing - Icom IC-7400 Service Manual

SECTION 5 ADJUSTMENT PROCEDURES

5-1 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
Frequency range
FM deviation meter
Measuring range
Frequency range
Modulation analyzer
Measuring range
Frequency range
Distortion meter
Measuring range
Frequency range
Oscilloscope
Measuring range
' ' CONNECTIONS
FM deviation meter
Modulation analyzer
Spectrum analyzer
RF power meter
Distortion meter
Speaker
Audio generator
+
[MIC]
GREDE AND RANGE
: 13.8 V DC
: 30 A or more
: 10–200 W
: 1.8–200 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–200 MHz
: ±1 ppm or better
: 100 mV or better
: 0.1–200 MHz
: 0.01–10 V
: DC–200 MHz
: 0 to ±5 kHz
: At least 200 MHz
: 0–100 %
: 1 kHz ±10 %
: 1–100 %
: DC–20 MHz
: 0.01–20 V
Attenuator
to [SP]
[ANT1] [ANT2] [ANT 144MHz]
–
PTT
EQUIPMENT
Frequency range
Audio generator
Measuring range
Frequency range
Standard signal
Output level
generator (SSG)
Imput impeadance
Digital multimeter
AC millivoltmeter Measuring range
DC voltmeter Input impedance
Measurement capability: 1 A/30 A
DC ammeter
Frequency range
Spectrum analyzer
Spectraum bandwidth : 100 kHz or more
Power attenuation
Attenuator
Capacity
Input impedance
External speaker
Capacity
Resistance
Terminator
Capacity
Ammeter
For entering the "ADJUSTMENT
MODE", connected to [REMOTE].
2-conductor 3.5 (d) mm (
Shorten inner and outer terminals.
5 - 1
GREDE AND RENGE
: 300–3000 Hz
: 1–500 mV
: 0.1–200 MHz
: 0.1 µV to 32 mV
(–127 to –17 dBm)
: 10 MΩ/DC or beter
: 10 mV–10 V
: 50 kΩ/V DC or better
: At least 90 MHz
: 50 or 60 dB
: 150 W or more
: 8 Ω
: 5 W or more
: 50 Ω and 100 or 25 Ω
: 150 W or more
Standard signal
generator
CAUTION !
DO NOT
transmit while
an SSG is connected to
the antenna connector.
DC power supply
Terminator
1
⁄ ")
8