Adjustment Procedures; Preparation - Icom IC-7700 Service Manual

SECTION 4

4-1 PREPARATION

¤ REQUIRED EQUIPMENTS
EQUIPMENT
Frequency range
Spectrum analyzer
Bandwidth
Measuring range
Frequency range
RF power
(terminated type)
Impedance
SWR
Frequency range
Frequency Counter Frequency accuracy : ±0.5 ppm or better
Input level
Frequency range
Modulation
Analyzer
Measuring range
Frequency range
Audio Generator
Output level
CAUTION!:
BACK UP originally programmed contents (Memory channels, Common settings, etc.) in the transceiver before
starting adjustment. When all adjustments are completed, these contents in the transceiver will be cleared.
¤ EXPOSING UNITS
CAUTION: The transceiver weighs approx. 22.5 kg (50 lb). Always have two people available to carry, lift or turn over the transceiver.
OSC UNIT cover
ADJUSTMENT PROCEDURE
SPECIFICATION
: At least 90 MHz
: 100 kHz or more
: 10–300 W
: 1.8–100 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–100 MHz
: Less than 1 mW
: 30–300 MHz
: 0 to ±10 kHz
: 300–3000 Hz
: 1–500 mV
Bottom cover
RF UNIT cover
PLL/SCOPE UNITs cover
EQUIPMENT
Input impedance
Digital multimeter Measuring range
Frequency range
Standard Signal
Output level
Generator (SSG)
AC Millivoltmeter Measuring range
Input impedance
External Speaker
Capacity
Power attenuation : 50 or 60 dB
Attenuator
Capacity
1) Remove 8 screws from the both sides.
2) Remove 7 screws from the bottom, then remove the
bottom cover.
3) Turn over the transceiver.
4) Remove 8 screws from the RF UNIT cover, 10 screws
from the PLL/SCOPE UNITs cover and 10 screws
from the OSC UNIT cover, then remove those covers.
4 - 1
SPECIFICATION
: 50 kΩ/DC or more
: Voltage: 0.1–10V
Current: 5A/30A
: 0.1–100 MHz
: 0.1 µV to 32 mV
(–127 to –17 dBm)
: 10 mV to 10 V
: 8 Ω
: More than 5 W
: More than 200 W