Adjustment Procedures; Preparation Before Servicing - Icom IC-7800 Service Manual Addendum

SECTION 4 ADJUSTMENT PROCEDURES

4-1 PREPARATION BEFORE SERVICING

' ' REQUIRED TEST EQUIPMENT
EQUIPMENT
Voltage
AC outlet
Measuring range
Frequency range
RF power meter
Impedance
(terminated type)
SWR
Frequency range
Frequency counter Frequency accuracy
Sensitivity
Frequency range
RF voltmeter
Measuring range
Measuring range
AC millivolt meter
Power attenuation
Attenuator
Capacity
Frequency range
Oscilloscope
Measuring range
CONNECTIONS
' '
AC outlet
AC millivolt meter
Speaker
AC millvolt Audio
meter generator
[MIC]
GRADE AND RANGE
: 85–265 V
: 250–300 W
: 1.8–100 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–100 MHz
: ±0.5 ppm or better
: 100 mV or better
: 0.1–100 MHz
: 0.01–10 V
: 10 mV to 10 V
: 50 or 60 dB
: 200 W
: DC to 20 MHz
: 0.01–20 V
to [AC] connector
to MAIN [EXT SP]
PTT
EQUIPMENT
Audio generator
Standard signal
generator (SSG)
Digital multimeter
DC voltmeter
DC ammeter
Spectrum analyzer
External speaker
Dummy load
[ANT4] [ANT3] [ANT2]
4 - 1
GRADE AND RANGE
Frequency range : 300–3000 Hz
Measuring range : 1–500 mV
Frequency range : 0.1–100 MHz
Output level : 0.1 µV to 32 mV
(–127 to –17 dBm)
Input impedance : 10 MΩ/DC or more
Input impedance : 50 kΩ/V DC or better
Measurement capability: 5 A/30 A
Frequency range : At least 90 MHz
Spectraum bandwidth : 100 kHz or more
: 8 Ω
Input impedance
Capacity : 5 W or more
: 50 and 100 Ω
Input impedance
Capacity : 200 W or more
Standard signal
generator
CAUTION !
DO NOT
an SSG is connected to
the antenna connector.
RF power meter
[ANT1]
transmit while