Adjustment Procedures; Preparation - Icom ID-31A Service Manual

SECTION 5.

5-1 PREPARATION

¤ REQUIRED EQUIPMENTS
EQUIPMENT
Voltage range
Power supply
Current capacity
Audio generator Frequency range
(AG) Output level
Modulation Frequency range
Analyzer Measuring range
AC millivoltmeter Measuring range
Measuring range
RF power meter
Frequency range
(50 Ω terminated)
SWR
¤ JIG CABLES
• JIG cable #1
3-conductor 3.5 (d) mm plug
(SP)
Less than 4.5 (d) mm
• JIG cable #2
3-conductor 2.5 (d) mm
Less than 4.5 (d) mm
¤ CONNECTION
POWER SUPPLY CONNECTION
• Adjustment at 13.5 V
To the [DC IN] jack
OPC-254L
B a l c : k
W h t i : e
DC power supply
13.5 V/3 A
ADJUSTMENT PROCEDURE
GRADE AND RANGE
: 1–15 V
: More than 3 A
: 300–3000 Hz
: 1–500 mV
: 30–600 MHz
: 0 to ±10 kHz
: 10 mV to 10 V
: 0.1–6 W
: 100–600 MHz
: Less than 1.2 : 1
(GND)
82 kΩ
(CLONE)
(300–3000 Hz/1–500 mV)
(GND)
plug
PTT
33 k
(EXTMIC)
4.7 µF
Standard signal generator
–20 to 90 dBµ
(–127 dBm to –17 dBm)
FM
deviation meter
RF power meter
0.1–6 W/50 Ω
Frequency
• Adjustment at 5.5 V or 7.4 V
Be sure about the polarity
DC power supply
5.5 V or 7.4 V/3 A
EQUIPMENT
JIG cable
Attenuator
Standard signal
generator (SSG)
Frequency counter
AUDIO GENERATOR
SETTING;
Frequency : 1 kHz
Level
+ −
Waveform : Sine wave
+
to the antenna connector
Attenuator
40 dB
counter
5 - 1
GRADE AND RANGE
Modifi ed 3-conductor plugs
(See the illustration below)
Power attenuation : 40 dB
Capacity : More than 6 W
Frequency range : 0.1–600 MHz
Output level : –20 dBµ to 90 dBµ
(–127 to –17 dBm)
Frequency range : 0.1–600 MHz
Frequency accuracy : ±1 ppm or better
Input level : Less than 1 mW
MILLIVOLTMETER
(10 mV to 10 V)
: 90 mVrms
DO NOT transmit while
an SSG is connected to
the antenna connector.
[DC IN]
AC
+ −
To [MIC]
JIG cables
To [SP]