Icom IC-725 Service Manual page 24

SECTION 6 ADJUSTMENT PROCEDURES
6·1 PREPARATION BEFORE SERVICING
•REQUIRED TEST EQUIPMENT
•
EQUIPMENT GRADE AND RANGE
EQUIPMENT GRADE AND RANGE
AC power supply Output voltage : 13.8 V DC DC voltmeter
Input impedance : 50 kO/DC or better
Current capacity : 30 A or more
AC milli-voltmeter Measuring range : 10 mv-10 v
RF power meter Measuring range : 10-2oow
External speaker Impedance : 80
(terminated type)
Frequency range
: 1.8-30 MHz
Impedance : 500
Ammeter Measurement capability: 1 A and 30 A
SWR : Less than 1.2: 1
Audio generator Frequency range : 300-3000 Hz
Frequency counter Frequency range : 0.1-100 MHz
Output level : 1-500 mv
Frequency accuracy :
±
1 ppm or better
Attenuator Power attenuation : 40 or 50 dB
Sensitivity : 100 mV or better
Capacity : 150 W or more
RF voltmeter Frequency range : 0.1-100 MHz
Spectrum analyzer
Frequency minimum : At least 90 MHz
Measuring range : 0.01-10 v
Spectrum bandwidth :
±
100 kHz or more
Oscilloscope Frequency range : DC-20 MHz
Measuring range : o.01-1ov
Standard signal Frequency range : 0.1-30 MHz
generator (SSG)
Output level : -127--17 dBm
(0.1 µV-32 mV)
•CONNECTION
Spectrum
analyzer
Attenuator
40 or 50 dB
Standard signal
---..---1
generator
RF power meter
200 W/50 0
1------------
AC
ll"I'll1--........
---to_[_EXT_s_~
_ _
~
milli-voltmeter
o o
0 0
Speaker
AC power supply
13.8 V/30 A
to
DC
power socket
[EXT
S~
IC-725
to [MIC]
• [MIC] connector (Front panel view)
to the
antenna
connector
CAUTION:
DO NOT connect the
signal generator while
transmitting.
,._--Pin 1 MIC----.
Audio
generator
Pin 7
MIC
GND
6-1
.