IC-746 FAQ
6 PROBLEMS AND CLARIFICATIONS..................................................... 66
6.1 What's that funny rattling noise I hear when I first power on?..................... 66
6.2 What's that "click" I hear as I tune across certain frequencies?................... 66
6.3 Why doesn't the ALC meter work while adjusting the "mic gain"?............. 66
6.4 Why can't I set numbers into memory names, CW keyer, etc...? .................. 66
6.5 Why isn't my output power up at 100 watts?................................................... 67
Low DC supply voltage. ....................................................................................... 67
You have an IC-746s instead of an IC-746........................................................... 67
Blown Internal Fuse.............................................................................................. 67
The RF driver transistors may have failed............................................................ 68
The RF power amplifier transistors may have failed............................................ 68
Blown Output Detector Diodes............................................................................. 68
Your ALC circuit may have failed........................................................................ 68
SWR Foldback...................................................................................................... 68
Confused Meter Readings..................................................................................... 68
CW Break-In Turned off....................................................................................... 69
Internal adjustments set a little low ...................................................................... 69
6.6 How low can the IC-746 supply voltage be?..................................................... 69
6.7 The backlight in my LCD has stopped working. What's wrong? ................. 70
6.8 Is there some way to get the Icom-746 to generate DTMF tones?.................. 73
6.9 Why don't my "band edge beeps" match the US amateur bands?................ 74
6.10 Can I transmit all the way out to the "band edge beeps"? ............................. 74
6.11 Can I reprogram the "band edge beeps"? ....................................................... 74
6.12 Do we know anything about the "band edge beeps"?..................................... 74
6.13 How I reset back to factory default settings? ................................................... 75
6.14 What "birdies" does the IC-746 have? ............................................................. 75
6.15 How do I adjust the LCD display? .................................................................... 76
6.16 The Noise Blanker doesn't seem to do any good. What's wrong? ................. 76
6.17 How do I get rid of ignition noise? .................................................................... 77
6.18 How do I adjust or make the NB work better?................................................ 77
6.19 How do I fix a loose rubber grip from the tuning knob? ................................ 78
6.20 Where should I go for repairs?.......................................................................... 78
6.21 How do I fix scratches on the LCD?.................................................................. 80
6.22 What can I do about sticky switches? ............................................................... 80
6.23 Why does the S-meter seem low on 2m FM?.................................................... 81
6.24 Why is my tuning shaft/knob loose and sloppy?.............................................. 81
6.25 Why is my audio cutting in and out? ................................................................ 81
7 MODIFICATIONS .................................................................................... 82
7.1 What TX/RX "mods" are there for the IC-746? ............................................. 82
7.2 What other "mods" are there for the IC-746?................................................. 82
6Khz wide IF filters .............................................................................................. 82
Safe 2m TX/RX Sequencing................................................................................. 83
Simple CAT interface ........................................................................................... 83
Separate 2m TX/RX Antenna Lines ..................................................................... 83
Increased MONITOR Volume.............................................................................. 84
Page 6 of 113
2003-02-08
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