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SECTION 2
INSIDE VIEWS
2 - 1
* Located under
side of the point
1st LO PLL circuit
PLL IC
(IC1801:
MC145170)
2nd LO and ref
erence
oscillator circuit
1st mix
er circuit
(Q211, Q212:
2SK1740)
3rd LO PLL circuit
2nd mix
er
(D261:
HSB88WS)
RF unit
TX 3rd mix
er
(IC400:
MC1496V)
DSP unit
RX 3rd mix
er *
(IC280:
TC4W53F)
MAIN unit
• MAIN AND RF UNITS
Summary of Contents for IC-7400
Page 1: ...HF VHF TRANSCEIVER i7400 SERVICE MANUAL ...
Page 63: ...to S LOGIC board J303 DS1002 9 2 DISPLAY BOARD TOP VIEW 9 3 for free by RadioAmateur eu ...
Page 72: ...9 12 1 9 18 10 BOTTOM VIEW RF UNIT for free by RadioAmateur eu ...
Page 74: ... BOTTOM VIEW CTRL UNIT 9 14 for free by RadioAmateur eu ...
Page 76: ... BOTTOM VIEW TUNER UNIT 9 16 for free by RadioAmateur eu ...
Page 78: ...9 18 BOTTOM VIEW PA UNIT for free by RadioAmateur eu ...
Page 92: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13811HZ C2 2002 Icom Inc ...