ICOM service manual IC 726

INTRODUCTION DANGER This service manual describes the latest service informa- NEVER connect the transceiver to an AC outlet or tion for the 10-726 HF/50 MHz ALL MODE TRANSCEIVER to a DC power supply that uses more than 16V. This al ihe time of publication. will ruin the transceiver. — 7 —_— | NOT expose ihe transceiver to rain, snow or To upgrade quality, all electrical or mechanical parts any liquids and internal circuits are subject to change without Oo AC à Ci | Wh F at _ = = - ret 7 7 notice or obligation. _ ___| DO NOT reverse the polarities of the DC power supply when connecting the transceiver. DO NOT apply an AF signal of more than 20 dBm (100 mW) to the antenna connector, This could damage the transceiver's front end. = _ 5 ea = Sf 126 Og re 6 — 4 Po | en ni eee (Le) | | Cm i ei, a oe ee Es —_ — s = ae | sé a | ORDERING PARTS REPAIR NOTE Be sure to include the following four poi

--- TABLE DES MATIERES / CONTENTS --- TABLE OF CONTENTS SECTION 1 SPECIFICATIONS ..................................................... Ÿ—14 SECTION 2 INSIDE VIEWS... 22 2-1 PLL AND MAIN UNITS ........ eee ee cep euuuuee eee 2—1 2-2 PA, PB AND FILTER UNITS.......0...0.. 0000 ccc cece cece eevee ec eee eeuees 2—2 SECTION 3 BLOCK DIAGRAM ....................................................... 1 SECTION 4 MECHANICAL PARTS AND DISASSEMBLY............................ 4—1~8 4-1 FRAME DISASSEMBLY ............0.0. eee eee eee eee. 4—1 4-2 PAAND ACCESSORIES ................ eue eee ce eee ev nee eue. 4—3 SECTION 5 PARTS LIST......................................................... B=1~16 SECTION 6 ADJUSTMENT PROCEDURES. ....................................... 6— 1 12 6-1 PREPARATION BEFORE SERVICING. ............... eee ueueuuse 6— 1 6-2 PLL ADJUSTMENT .....0.0000 eee deu eee vue eee 6—2 6-3 RECEIVER ADJUSTMENT... ce u ee eee eee erueeeee 6—4 6-4 TRANSMITTER ADJUSTMENT .......00....0 00... cee ccc eee eue 6—8 SECTION 7 BOARD LAYOUTS .................................................. T—14—6 7-1 FRONT UNIT... ccc uuur eee eue eee T— 7 7-2 MAIN UNIT... eee ee peur eee ee eue 7—2 7-3 PLL…