Typical board allocation ........................................................ 3 Block Diagram HM404 ........................................................... 4 AT - Board Diagram .................................................................................... 6 Diagram .................................................................................... 7 Top side ..................................................................................... 9 Rear side ................................................................................. 13 MB - Board Diagram .................................................................................. 16 Diagram .................................................................................. 17 Diagram .................................................................................. 18 Diagram .................................................................................. 19 Diagram .................................................................................. 20 Top side ................................................................................... 21 Rear side ................................................................................. 25 YF - Board Diagram .................................................................................. 28 Top and rear side .................................................................... 29 FC - Board Diagram .................................................................................. 32 Diagram .................................................................................. 33 Top side ................................................................................... 35 Rear side ................................................................................. 39 Readout - Board Diagram .................................................................................. 40 Diagram .................................................................................. 41 Top side ................................................................................... 43 Rear side ................................................................................. 47 CRT - Board Diagram .................................................................................. 50 Top and rear side .................................................................... 51 PS - Board Diagram .................................................................................. 54 Top side ................................................................................... 55 Rear side ................................................................................. 59 IF (RS 232) - Board Diagram .................................................................................. 62 Top and rear side .................................................................... 63 PI - Board Diagram & Top and rear side ................................................. 66
