This service manual describes the latest information for the following Transceiver at the time of going to press IC-4SAT U.S.A. version (version no. #05) IC-4SAT Australia version {version no. #07) IC-4SAT Asia version (version no. #08) IC-4SET Europe version (version no. #04) IC-4SA U.S.A. version (version no. #06) IC-4SA Australia version (version no #07) IC-4SA Asia version (version no. #09) IC-4SE Europe version (version no. #04) SECTION 1 SPECIFICATIONS... 1 — 1 SECTION 2 INSIDE VIEWS... 2 —1~2 2 - 1 IC-4SAT SET... 2—1 2 - 2 IC-4SA SE... 2 — 2 SECTION 3 BLOCK DIAGRAM... 3 — 1 SECTION 4 CIRCUIT DESCRIPTION... 4 —1~6 4 -1 Receiver CIRCUITS... 4 — 1 4-2 Transmitter CIRCUITS... 4 — 2 4-3 PLL CIRCUITS... 4 — 3 4 - 4 Power Supply CIRCUITS... 4 — 4 4 - 5 OTHER CIRCUITS... 4 — 4 4 - 6 CPU PORT ALLOCATIONS (LOGIC UNIT)... 4 — 5 SECTION 5 MECHANICAL PARTS AND DISASSEMBLY... 5 — 1-4 5 -1 IC-4SAT SET... 5 — 1 5 - 2 IC-4SA SE... 5 — 3 5-3 ACCESSORIES... 5 — 4 SECTION 6 PARTS LIST... 6 — 1 ~ 9 SECTION 7 ADJUSTMENT PROCEDURES... 7 — 1 ~ 5 7 -1 PREPARATION BEFORE SERVICING... 7—1 7-2 PLL ADJUSTMENT... 7 — 2 7 - 3 Receiver ADJUSTMENT... 7 — 3 7 - 4 Transmitter ADJUSTMENT... 7 — 4 SECTION 8 BOARD LAYOUTS... 8 — 1-13 8-1 LOGIC (LGC) UNIT... 8—1 8-2 LOGIC DAUGHTER UNITS... 8 — 5 8-3 INITIAL MATRICES... 8 — 6 8-4 PRT UNIT... 8 — 6 8-5 MAIN UNIT... 8 — 7 8 - 6 MAIN DAUGHTER UNITS... 8 — 9 8-7 VR UNIT... 8 — 13 SECTION 9 OPTIONAL UNITS... 9 — 1-3 9 - 1 UT-50 TONE SQUELCH UNIT... 9 — 1 9 - 2 UT-51 TONE ENCODER UNIT... 9 — 2 9-3 UT-49 DTMF DECODER UNIT... 9 — 3 SECTION 10 VOLTAGE DIAGRAMS... 10 — 1-2 10-1 IC-4SAT SET... 10—1 10-2 IC-4SA SE... 10 — 2