Nad T 572 C Service Manual

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3-17 3-18 NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. R1A1 56(2W) '02. 03. 19 R14140A CIRCUIT DIAGRAM 1. POWER(SMPS) CIRCUIT DIAGRAM NOTE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode. Oscillation abnormal Digitron no Power 3.3V line dead. No Power 8V line dead 5V_A/5V_D, No Power No Power

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3-19 3-20 5 6 Spindle Servo Loop RF SIGNAL Focus Servo Loop Tracking Servo LoopSled Servo Loop WAVEFORM D201D202 R284 R283 '02. 03. 19 R14135A 2. DVD DSP CIRCUIT DIAGRAM DVD/CD picture audio abnormal µ-com Interface adress CD/DVD picture audio abnormal Focus Servo fail Tracking Servo fail Scratched Disc abnormal Sled Servo fail DRAM Control Disc Detect Error Spindle Servo fail

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LEVEL(V) MODE PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 533.18 1.3 1.4 1.8 1.5 0 1.5 1.4 1.6 3.1 0.7 0.15 0.15 0 0 1.7 1.4 0 1.5 1.6 0 1.6 0 3.1 1.7 1.4 3.1 1.5 0.15 0 0.7 1.5 1.8 2 3.1 2.9 2.2 2.9 0 0 0 1.6 3.1 1.6 1.5 0 1.4 0 1.5 1.7 1.2 3.1 LEVEL(V) MODE PIN NO. 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 1081.6 1.4 1.5 0 1.6 1.4 1.5 1.4 3.1 1 1.5 0.005 0.5 0.003 1.58 0 3.1 1.2 1.2 1.2 1.2 3.1 1.65 1.8 1.5 1.5 3.1 3.1 0.001 3.1 3.7 0 3.1 3.1 1.8 0.004 3.1 0 0 0 1.8 3.1 0 0 0 0 2.1 2.1 LEVEL(V) MODE PIN NO. 109 11 0 111 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 1630 0.8 0.9 1.3 3.1 0.78 0 1.26 0.08 1.2 2 0 3.1 3.1 3.1 3.1 0 1.8 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 0 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 1.8 1.5 3.1 0 LEVEL(V) MODE PIN NO. 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 2183.1 3.1 3.1 3.1 3.1 3.1 3.1 0 3.1 3.1 3.1 1.5 3.1 0 3.1 3.1 3.1 3.1 3.18 0.086 3 2.4 2.3 0 0 3.1 0 0.017 1.8 3.1 3.1 0 3.18 1.3 3.1 3.1 3.1 0 2.3 3.1 0.001 3.1 3.1 3.1 1.6 3.1 3.18 0.018 1.8 3.19 2.69 1.5 2.9 2.59 0 LEVEL(V) MODE PIN NO. 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 2402.29 2.08 2.29 2.29 2.49 3.1 2.39 2.45 1.5 0 1.52 0 1.61 1.6 3.1 1.6 1.6 1.5 0 1.6 1.4 1.5 LEVEL(V) MODE PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 534.4 0 0 0 3.2 0 0 0 0 0 0 3.2 3.2 0 0 0 0 0 0 0 0 0 0 0 0 3.2 0 0 0 0 0 0 0 2.2 0 0 0 3.2 0 0 0 0 2.2 0 3.2 2.4 3.2 2.3 0 0 3.2 1.7 3.1 LEVEL(V) MODE PIN NO. 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 1000 0 0 3.2 0 0 0 0 0 0 0 0 0 0 3.2 0 3.2 3.2 0 0 3.2 0 1.5 0 4.4 0 0 0 3.2 0 0 3.2 0 4.4 3.2 2.6 3.2 3.2 3.2 3.2 0 3 0 3.2 3.2 4.7 0 PANTERA MEMORY IC301 IC501 LEVEL(V) MODE PIN NO. DSP IC201 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 533 3 3 3 3 3 3 3 0 3.08~3.1 2.97~3.1 3~3.1 3~3.1 3~3.1 3~3.1 3~3.1 3~3.1 3.24 0.2~0.3 0.3 0.41~1 0.41~1 0.41~1 3.24 0.4~1 0.4~1 0.4~1 0.4~1 0.4~1 0.4~1 0 3~3.1 3~3.1 3~3.1 3~3.1 0 1.597 0 0 12.3mV 3.24 3.24 3.24 0.5~1.6 0.5~1.6 0.5~1.6 0.15~1 0 3.2 0 0.3~1 0.2~1 0 LEVEL(V) MODE PIN NO. 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 1085.19 0 0 0 1.698 1.97 0 3.24 0 3.24 0 0 0 0 3.24 0 3.25 0 3.24 0 0 0.8 2mV~1.459 0.795 0.795 2.17 2.13 3.27 0 1.99 2.19 0 0 1.989 2.08 1.987 1.645 0.834 2.43 1.628 1.648 2.42 1.636 1.649 0 0 1.649 3.28 3.27 2.05 2.07 1.2~1.39 3.23 0 3.24 LEVEL(V) MODE PIN NO. 109 11 0 111 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 1633.24 0 0 0 0 0 0 0 0 0 0 3.23 1.59~1.63 3.23 3.23 0 3.24 3.23 0 0 3.28 3.28 3.28 0 0 3.24 3.24 0 1.699 1.906 0 0 0 3.23 2.48~2.17 0 0 0 0 0 172mV 2.47~2.56 0 3.23 0 1.58~1.62 0 3.23 3.23 0 0 0 2.72 3.27 3.27 - CIRCUIT VOLTAGE CHART 3-37 3-38

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3-2 ELECTRICAL TROUBLESHOOTING GUIDE No 5V_D or 5V_A . No 5.2VA. Is 5.2VA section working? (Is the POWER CTL at Pin6 High/low?) Is oscillation present at the Base of Q108? Replace Q108. Check D109, C123, R125, R124. Replace R102. Replace BD101. (Bridge rectifier) Is R102(R104) normal? Is about AC 100V applied to IC101 Pin 3. Check IC101. Is 5.2V applied to IC102 Pin 1? Is there a DC voltage at the (+) terminal of BD101? Check R127, 128. (SHUTDOWN CKT) 1. Power(SMPS) Circuit No FLD Is 5.2VA section working? Replace SMPS trans(T101). Replace the inferior components. Are D109, L103 open? NO NO NO NO NO NO YES YES YES YES YES YES YES A. B. NO NO

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3-11 See the eye-pattern vivid? Does the sawtooth waveform emit at IC2A1 Pin 36? Does the 1.6V emit? Check RF Eye-Pattern. RF : 1.5-1.6V(Q2A6 collector) Fig.5. RF waveform Check IC2A1 Pins 47, 50, 51, 52. No signal: Pick-up is defective Replace IC201. Check IC201 Pin84. No signal at IC201 : IC201 is defective - Check IC201 Pin 105. - Check the clock at the IC201 Pins 138. - Both are normal : IC201 is defective Replace IC2A1. CHECK A D. END NO NO NO NO YES YES YES YES