DJM-909
4
1234
123
4
C
D
F
A
B
E
3.18 FDVR ASSY ........................................................................................................................................... 52
3.19 SDRT ASSY........................................................................................................................................... 54
3.20 XLR ASSY (1/2) ..................................................................................................................................... 56
3.21 XLR ASSY (2/2) ..................................................................................................................................... 58
3.22 LVMR (1/2), C1TR, C2TR, FVA1 and FVA2 ASSYS .............................................................................. 60
3.23 LVMR ASSY (2/2) .................................................................................................................................. 62
3.24 CFVR, RVSW and FSSW ASSYS ......................................................................................................... 64
3.25 LCD ASSY ............................................................................................................................................. 66
3.26 SW POWER SUPPLAY.......................................................................................................................... 68
3.27 VOLTAGES ............................................................................................................................................. 69
3.28 WAVEFORMS ........................................................................................................................................ 75
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 80
4.1 MAIN ASSY ............................................................................................................................................. 80
4.2 DSP ASSY ............................................................................................................................................... 84
4.3 C1EQ ASSY............................................................................................................................................. 86
4.4 C2EQ ASSY............................................................................................................................................. 87
4.5 C1BF ASSY ............................................................................................................................................. 88
4.6 C2BF ASSY ............................................................................................................................................. 89
4.7 MICB ASSY ............................................................................................................................................. 90
4.8 HPBO ASSY ............................................................................................................................................ 91
4.9 LVMR, C1TR, C2TR, FVA1, FVA2 and FDVR ASSYS............................................................................. 92
4.10 LVMR, C1TR, C2TR, FVA1, FVA2 and FDVR ASSYS........................................................................... 94
4.11 SDRT ASSYS ........................................................................................................................................ 96
4.12 XLR ASSY ............................................................................................................................................. 97
4.13 CFVR, RVSW and FSSW ASSYS ......................................................................................................... 98
4.14 LCD ASSY ........................................................................................................................................... 100
4.15 SW POWER SUPPLY .......................................................................................................................... 102
5. PCB PARTS LIST ......................................................................................................................................... 104
6. ADJUSTMENT ............................................................................................................................................. 112
6.1 ADJUSTMENT REQUIRED WHEN THE SET IS REPAIRED OR REPLACED ..................................... 112
6.2 CH1 OFFSET ADJUSTMENT................................................................................................................ 114
6.3 CH1 GAIN ADJUSTMENT ..................................................................................................................... 115
6.4 CH2 OFFSET ADJUSTMENT................................................................................................................ 116
6.5 CH2 GAIN ADJUSTMENT ..................................................................................................................... 117
6.6 CH1 EQ Low ADJUSTMENT ................................................................................................................. 118
6.7 CH1 EQ Mid ADJUSTMENT.................................................................................................................. 119
6.8 CH1 EQ Hi ADJUSTMENT .................................................................................................................... 120
6.9 CH2 EQ Low ADJUSTMENT ................................................................................................................. 121
6.10 CH2 EQ Mid ADJUSTMENT................................................................................................................ 122
6.11 CH2 EQ Hi ADJUSTMENT .................................................................................................................. 123
7. GENERAL INFORMATION ........................................................................................................................... 124
7.1 DIAGNOSIS ........................................................................................................................................... 124
7.1.1 SERVICE MODE ............................................................................................................................. 124
7.1.2 Rewriting of the Software................................................................................................................. 128
7.1.3 POWER ON SEQUENCE................................................................................................................ 135
7.1.4 Table of the roles of the microcomputers ......................................................................................... 136
7.1.5 DISASSEMBLY................................................................................................................................ 138
7.1.6 CONFIGURATION OF THE PC BOARD ......................................................................................... 144
7.2 PARTS.................................................................................................................................................... 145
7.2.1 IC INFORMATION ........................................................................................................................... 145
8. PANEL FACILITIES AND SPECIFICATIONS ............................................................................................... 150