PD-F1007
52
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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.
<<< Rack section >>>
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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.
<<< Hood Section >>>
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.
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
DCNT
DPOS
Disc No.
21 22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
19
20
DCNT
DPOS
Disc No.
39 40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
37
38
DCNT
DPOS
Disc No.
57 58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
55
56
DCNT
DPOS
Disc No.
75 76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
73
74
DCNT
DPOS
Disc No.
93 94
95
96
97
98
99 100 101 102 103 104 105 106 107 108
91
92
DCNT
DPOS
Disc No.
111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
109 110
DCNT
DPOS
Disc No.
129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
127 128
DCNT
DPOS
Disc No.
147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
145 146
DCNT
DPOS
Disc No.
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
163 164
DCNT
DPOS
Disc No.
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
181 182
DCNT
DPOS
Disc No.
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
199 200
DCNT
DPOS