Icom IC-7410 Service Manual - Page 22

4-3 ADJUSTMENTS ON THE MAIN UNIT ADJUSTMENT ITEM TRANSCEIVER'S CONDITION PRESET • Receiving OPERATION - MEASURE POINT - ADJUST POINT L3652 VALUE Screw the core all the way inside the coil. • THE LOCATION OF ADJUST/CHECK POINTS ON THE MAIN UNIT Preset point R3674 R3676 L3692 C3697 J3201 TO RF-A RL C3692 C3694 R3675 C3693 L3693 C3696 C3695 D3671 L3671 R3253 R3263 R3268 L3652 D3254 73 1 R3654 L3672 R3673 R3672 C3655 R3671 C3654 C3676 R3658 R3656 C3656 C3657 R3655 Q3651 R3653 C3653 R3605 R3604 R36 C3607 C3 4-4 ADJUSTMENTS ON THE RF-A UNIT ADJUSTMENT ITEM TX ADJUSTMENT (TX power) RX ADJUSTMENT (Sensitivity) MIXER BALANCE RX SUPRIOUS* TRANSCEIVER'S CONDITION • Frequency: 14.010 MHz • Mode: USB • Transmitting • Frequency: 14.150 MHz • Mode: USB • Receiving • Frequency: 14.150 MHz • Mode: USB • Receiving • Frequency: 3.621565 MHz • Mode: USB • [PREAMP]: OFF • Receiving OPERATION MEASURE POINT 1) Connect an RF power meter to [ANT1] [ANT1]. 2) Connect an audio generator and millivoltmeter to [MIC], and then set it as; Frequency : 1.5 kHz Level : 1 mV 1) Connect an SSG to [ANT1], and [EXT-SP] then set it as; Frequency : 14.1515 MHz Level : -10 dBµ (-117 dBm) Modulation: None 2) Connect a millivoltmeter and a speaker to [EXT-SP]. 1) Connect a terminator to [ANT1]. J741 2) Connect a spectrum analyzer to the J741. • Connect a millivoltmeter to [EXT- [EXT-SP] SP]. ADJUST POINT L612 L723, L1071 R725, R726 VALUE Max. TX power Max. voltage Min. level Min. AF output level IMAGE REJECTION • Frequency: 14.150 MHz • Mode: USB • Receiving *: For all models except [TPE] and [KOR]. 1) Connect an SSG to [ANT1], and then set it as; Frequency : 14.0765 MHz Level : +50 dBµ (-57 dBm) Modulation : None 2) Connect a millivoltmeter and a speaker to [EXT-SP]. [EXT-SP] R1276, Min. AF output C1121 level (Repeatedly) 4 - 4