Icom IC-7400 Service Manual

2 - 1
SECTION 2
.
INSIDE VIEWS
* Located under
side of the point
1st LO PLL circuit
PLL IC
(IC1801: MC145170)
2nd LO and reference oscillator circuit
1st mixer circuit
(Q211, Q212: 2SK1740)
3rd LO PLL circuit
2nd mixer
(D261: HSB88WS)
RF unit
TX 3rd mixer
(IC400: MC1496V)
DSP unit RX 3rd mixer *
(IC280: TC4W53F)
MAIN unit
• MAIN AND RF UNITS

Icom IC-7400 Specifications

General

Frequency Range TX	1.8-54 MHz
Frequency Range RX	0.03-60 MHz
Modes	SSB, CW, RTTY, AM, FM
Output Power	100W (HF/50MHz), 50W (144MHz)
Receiver Type	Triple conversion superheterodyne
Antenna Connector	SO-239
IF Rejection	More than 70 dB
Supply Voltage	13.8 V DC ±15%
Current Drain RX	1.5 A
Image Rejection	More than 70 dB
Audio Output Power	2 W
Current Drain TX	20 A
Sensitivity	0.13 μV (SSB/CW)
Selectivity	SSB: 2.4 kHz