Icom IC-M504, Service Manual, Page: 13 / 35

5 - 1
SECTION 5 ADJUSTMENT PROCEDURES
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REQUIRED TEST EQUIPMENTS
EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE
DC power supply
Output voltage : 13.8 V DC
Current capacity : More than 7 A
DC voltmeter Input impedance : 50 k
Ω
/V DC or better
RF power meter
(terminated type)
Measuring range : 0.1–30 W
Frequency range : 100–300 MHz
Impedance : 50
Ω
SWR : Less than 1.2 : 1
Standard signal
generator (SSG)
Frequency range : 0.1–300 MHz
Output level : 0.1
µ
V to 32 mV
(–127 to –17 dBm)
Frequency counter
Frequency range : 0.1–300 MHz
Frequency accuracy : ±1 ppm or better
Sensitivity : 100 mV or better
AC millivoltmeter Measuring range : 10 mV to 10 V
FM deviation meter
Frequency range : 30–300 MHz
Measuring range : 0 to ±10 kHz
External speaker
Input impedance : 4
Ω
Capacity : More than 5 W
Audio generator
Frequency range : 300–3000 Hz
Output level : 1–500 mV
Attenuator
Power attenuation : 40 or 50 dB
Capacity : More than 30 W
5-1 PREPARATION
T
o the antenna connector
To DC power connector
Standard signal
generator
0.1
µ
V to 32 mV
(–127 to –17 dBm)
CAUTION:
DO NOT
transmit while SSG is connected
to the antenna connector.
Frequency
counter
FM deviation
meter
Attenuator
40 dB or 50 dB
RF power meter
1–30 W
To external speaker lead
Distortion meter
AC millivoltmeter
Speaker (4
Ω
)
DC power supply
13.8 V /7 A
+
–
SP+ (Yellow)
SP− (Shield)
Red
+
–
–
+
AC millivoltmeter
Audio generator
8 1 2 3 6 7 4
[PTT
PTT
MICG
MIC
]
5
J4
(LOGIC UNIT)
• CONNECTION