Table Des Matières - QRP Labs QCX-mini CW Mode D'emploi

Contents
Contents.............................................................................................................................................................2
1. Introduction................................................................................................................................................4
2. Parts list......................................................................................................................................................5
3. Assembly - general guidelines..................................................................................................................11
3.1 Inventory parts..............................................................................................................................................27
3.2 Wind and install transformer T1....................................................................................................................28
3.3 Install IC2 socket............................................................................................................................................36
3.4 Install 100nF (0.1uF, "104") capacitors..........................................................................................................37
3.5 Install all 470nF, "474" capacitors.................................................................................................................38
3.6 Install 47nF, "473" capacitor.........................................................................................................................38
3.7 Install capacitors C25 and C26 from Low Pass Filter kit.................................................................................39
3.8 Install capacitors C27 and C28 from Low Pass Filter kit.................................................................................40
3.9 Install capacitor C30......................................................................................................................................41
3.10 Install capacitors C5 and C8...........................................................................................................................42
3.11 Install 1uF, "105" capacitors C21, and C22....................................................................................................44
3.12 Install 1N5819 diode......................................................................................................................................45
3.13 Install 20MHz crystal XTAL1...........................................................................................................................46
3.14 Install 27MHz crystal XTAL2or TCXO option..................................................................................................48
3.15 Install 500-ohm multi-turn trimmer potentiometer......................................................................................50
3.16 Install 50K multi-turn trimmer potentiometers.............................................................................................51
3.17 Install 470uF capacitors.................................................................................................................................53
3.18 Install 30pF trimmer capacitor C1.................................................................................................................55
3.19 Install MPS751 transistor Q6.........................................................................................................................56
3.20 Install three BS170 transistors.......................................................................................................................57
3.21 Install 2x3-pin in-circuit programming header..............................................................................................58
3.22 Install 2x5 LCD header...................................................................................................................................59
3.23 Install 2x4 UI header......................................................................................................................................60
3.24 Wind and install toroid L4.............................................................................................................................60
3.25 Wind and install toroid L2.............................................................................................................................62
3.26 Wind and install toroids L1 and L3.................................................................................................................64
3.27 Install 2.1mm power connector.....................................................................................................................65
3.28 Install RF output BNC connector....................................................................................................................66
3.29 Install 3.5mm stereo jack connectors............................................................................................................67
3.30 Break apart inner PCBs of display board........................................................................................................68
3.31 Install LCD module.........................................................................................................................................71
3.32 Install 2x5-pin male pin header connector....................................................................................................72
3.33 Install four 11mm nylon spacers....................................................................................................................73
3.34 Install 20K trimmer potentiometer R47.........................................................................................................73
3.35 Install 2x4-pin male header on controls PCB.................................................................................................75
3.36 Install rotary encoder....................................................................................................................................77
3.37 Install tactile switch buttons..........................................................................................................................78
3.38 Install gain control potentiometerR36...........................................................................................................78
3.39 Install 11mm nylon hex spacer......................................................................................................................79
3.40 Fit Controls PCB to main PCB.........................................................................................................................80
3.41 Install microcontroller...................................................................................................................................81
3.42 10uF input capacitor C38...............................................................................................................................81
3.43 Plug together the two boards........................................................................................................................85
3.44 Connections for basic operation....................................................................................................................85
3.45 Notes on fault-finding for the QCX-mini........................................................................................................86
QCX-mini assembly Rev 1.05_Fr
2