Pioneer PD-F1007 Service Manual - Page 52

PD-F1007 User Display Display > Contents None • When the position of the selection mechanism just before switching to disc selection operation os DCNT terminal = "L". (Normally, DCNT terminal = "H" exists when the selection mechanism is stopped, so that it can be assumed that the position of the mechanism has deviated for some reason. There is the possibility that a position deviation of the mechanism can cause a defect of the mechanism.) None • At the time of movement of the selection mechanism, a deviation has occurred between the present position of the disc and the disc position according to position detection. (It can be assumed that the waveform at the DCNT terminal and/or at the DPOS terminal has been miscounted. When a miscount occurs, a discrepancy occurs between the displayed disc No. and the counted disc position.) None • When the position of the mechanism became DCNT terminal = "L" during disc loading. (Normally, DCNT terminal = "H" exists when the selection mechanism is stopped, so that it can be assumed that the position of the mechanism has deviated for some reason. There is the possibility that a position deviation of the mechanism can cause a defect of the mechanism.) None • At the time of shifting to a different disc after play completion, the pickup does not return to the innermost circumference. > User Display Display Contents The hood did not open within a fixed time. The hood switch was broken. The hood did not close within a fixed time. The hood switch was broken. None It was tried to force the closed hood open. The hood switch was broken. 7.2.3 EXPLANATION OF DISC DETECTION 1. Detection of the rack position There are two types of slits on the rear of the rack, and their combination is used to find which disc has been selected during rack rotation. The input ports (DCNT, DPOS) are as follows. Disc No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 DCNT DPOS Disc No. 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 DCNT DPOS Disc No. 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 DCNT DPOS Disc No. 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 DCNT DPOS Disc No. 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 DCNT DPOS Disc No. 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 DCNT DPOS Disc No. 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 DCNT DPOS Disc No. 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 DCNT DPOS Disc No. 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 DCNT DPOS Disc No. 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 DCNT DPOS Disc No. 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 DCNT DPOS Disc No. 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 DCNT DPOS 52