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NAD
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T-571-AH
Schematic
13 pgs5.78 Mb0
Service manual
41 pgs7.66 Mb0

NAD T-571-AH Schematic

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Page 1
NOTES) Warning
NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock.
470µF/2.3V
'01. 09. 21 R10581B
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
Page 2
5
56
Spindle Servo Loop
RF SIGNAL
Focus Servo Loop Tracking Servo Loop
Sled Servo Loop
WAVEFORM
2. DVD DSP CIRCUIT DIAGRAM
DVD/CD picture
audio abnormal
MPEG Interface
Line
µ-com
Interface Data
µ-com
Interface adress
CD/DVD picture
audio abnormal
Tracking/Focus
Servo fail
Tracking
Servo fail
Spindle Motor
abnormal
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
Page 3
3. DRIVE & RF CIRCUIT DIAGRAM
4
1
6
2
3
1
WAVEFORM
Spindle Servo Loop
Turn Table Loop
Focus Servo Loop Tracking Servo Loop
Sled Servo Loop
Turntable
not operate
Tray Loading
Speed control
Turn table
speed control
Spindle Motor
unstable
Actuator spindle sled not operate
DVD laser
not operate
CD laser
not operate
Servo fail
DVD Mode fail DVD
Laser not operate
Tracking Servo fail
Focus
Servo fail
µ-com
Interface line
CD/DVD picture
abnormal
Page 4
4
4
3
7
5
2 6
WAVEFORM
OPTICAL/COAXITAL OUT
Y/Pb/Pr(Component) Y.c(S-VHS) Audio L/R OUT
CVBS
4. PANTERA CIRCUIT DIAGRAM
No Power on
Audiuo DAC Interface
System not operate
DSP interface line
Spindle Motor unstable
System not working or Digitron not display.
Page 5
• WAVEFORMS
IC2A1 Pin 42, Focus Error IC2A1 Pin 36, Pi
IC2A1 Pin 41 Tracking Error
IC501 Pin 114 Component Y
IC2A1 Pin 41 VBR TRACKING Error
IC2A1 Pin 57, RF
IC201 Pin 88, SLED Drive(FMO) IC201 Pin 18, SLED FG
IC2A1 Pin42, Focus Error(in Focus Search) IC201 Pin 83, Focus Drive(FDO)
IC501 Pin 118, Composite IC501 Pin 112, Chrominance
(Super video out Mode)
Tek
Stop :
2.50MS/s
4 Acqs
M20.0µs
2 Apr 1999 14:47:27
Glitch
Ch1
Ch3
500mV
[T ]
T
3
IC501 Pin 114, Luminance (Super video out Mode)
Tek
Stop :
1 00kS/s
3290 Acqs
M 500µs
CH1
280/mV
Edge Slope
Type
<Edge>
Source
Ch1
Coupling
DC
Level
280mV
Mode
&
Holdoff
3
Ch3
1.00V
[ T ]
Slope
T
IC501 Pin 99, PANTER MAIN
IC501 Pin 112 Component Pb
IC501 Pin 110 Component Pr
TURN(+)(-) from Motor Drive Reverse turn
Sensor 1 (disc position) Sensor 2 (disc ready)
TURN(+)(-) Signal from µ-com
TE/TZC After tracking servo ON (Play mode)
TURN(+)(-) from Motor Drive Forward turn
TE/TZC Before tracking servo ON
TZC/MIRR (Search mode) FG Signal from M/D
(Play mode)
TE/SLD(+) Search mode (outter & inner) Tray open Tray closed
Page 6
5. MEMORY CIRCUIT DIAGRAM
Program download fail
Digitron abnormal
Not used
Not power on
Not memoried setup Menu
Turntable not operating
“No Disc” display
Tray not open/close
Tray not closed
Pick-up not initial
operating
Disc Detec Error
Disc number detect error
Digitron all not display and system not operate
Digitron all not display System not working
Digitron all not display System not working
Page 7
6. TIMER & KEY CIRCUIT DIAGRAM
System not operate
Remocon not operate
Power not control
Digitron abnormal
Digitron abnormal
Page 8
7. A/V CIRCUIT DIAGRAM
L R
Q401 is defective 2CH. Audio out bad.
IC401 is defective. 2CH Audio out bad.
IC401 is defective. 2CH Audio out bad.
IC403, Q404 are defective. Digital data out bad.
Page 9
8. A/V JACK CIRCUIT DIAGRAM
Component, S-Video out can,t be changed.
Page 10
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 53
3.18
1.3
1.4
2.2
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
2.2 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
99 100 101 102 103 104 105 106 107 108
1.6
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
2.2
1.5
1.5
3.1
3.1
0.001
3.1
3.7 0
3.1
3.1
2.1
0.004
3.1 0
0
0
2.1
3.1 0 0 0 0
2.1
2.1
LEVEL(V)
MODE
PIN NO.
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
0
0.8
0.9
1.3
3.1
0.78 0
1.26
2.38
0.08
1.2 2 0
3.1
3.1
3.1
3.1
0
2.2
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
2.2
1.5
3.1
0
LEVEL(V)
MODE
PIN NO.
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
3.1
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
2.2
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
2.2
3.19
2.69
1.5
2.9
2.59 0
LEVEL(V)
MODE
PIN NO.
219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
2.29
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 53
4.3
3.1 0
3.2 2
3.1
0.01
3.1
3.2
3.2
3.2
3.2 0
3.1
3.1
3.1
0 0 0 3
0.625
3.2
0.705
3.2
3.1
0
3.1
3.1
2.39
3.2
1.49
1.5
3.09
1.69 0
3.1
3.1
2.5
3.1
3.1
3.2
3.1
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
3.1
3.1
3.1
3.1
3.1
3.1
3.1
0.5 0
3.1
3.1
3.1
3.1
3.1
1.6 0 0
3.1 0
3.1 0
3.2 0
3.1
0.3
0 0
2.5 0
3.19
3.19
4.4
3.19
4.4 0
4.4 0 0 0 0 0
3.17
3.17
3.1 0
PANTERA MEMORY
IC301IC501
EE PLAY
MODE
PIN NO.
DSP
IC201 SP3301
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 53
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
2.00
0.00
0.00
0.00
0.00
0.00
3.10
0.00
0.00
0.00
0.00
0.00
2.10
0.00
2.10
3.10
3.10
3.10
3.10
2.10
1.10
0.00
0.00
0.00
3.10
0.00
3.10
0.00
0.00
3.10
0.00
0.00
0.00
0.00
0.00
0.00
3.10
0.00
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
0.00
1.50
1.50
1.50
1.50
3.00
1.50
1.50
1.50
1.50
1.50
1.50
0.00
2.00
3.00
1.50
2.50
2.50
1.30
1.80
0.00
0.00
0.00
3.00
0.00
3.00
0.00
0.00
3.00
0.00
0.00
0.00
3.00
0.00
0.00
1.80
0.00
EE PLAY
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
99 100 101 102 103 104 105 106 107 108
3.10
3.10
0.00
0.00
5.00
0.00
0.00
5.00
0.00
2.10
0.00
3.10
0.00
3.10
0.00
0.00
0.00
3.10
0.00
0.00
3.10
0.00
0.00
0.00
0.00
3.10
5.00
0.00
5.00
2.10
2.10
3.10
1.40
0.00
2.10
2.10
0.00
1.50
3.10
1.60
1.10
2.00
1.55
0.00
1.55
1.56
3.10
1.55
1.55
1.62
1.55
1.50
0.00
0.00
0.00
3.00
3.00
0.00
3.13
4.98
0.00
0.00
4.98
0.00
2.10
0.00
3.00
0.00
3.12
0.00
0.20
0.00
3.10
0.20
0.00
3.10
0.00
0.00
0.00
2.30
3.10
5.00
0.00
5.00
2.00
2.10
3.10
1.40
0.00
2.00
2.00
0.00
1.55
3.12
1.55
1.11
2.00
1.55
0.00
1.55
2.15
3.10
1.58
1.55
1.64
1.55
1.50
0.00
0.00
0.00
EE PLAY
MODE
PIN NO.
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163
0.00
0.00
0.00
0.00
3.40
5.00
1.50
1.50
3.10
0.00
0.00
3.50
3.25
3.45
3.50
3.50
3.50
0.00
3.60
0.00
3.60
0.00
0.00
0.00
3.10
0.00
0.00
3.10
0.00
0.00
3.10
3.00
0.00
3.00
3.10
3.10
3.10
3.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.55
3.10
1.50
0.00
0.00
2.60
3.10
2.00
2.00
0.00
0.00
0.00
0.00
4.70
5.00
1.50
1.53
3.10
0.00
0.00
4.20
4.20
4.30
4.30
4.30
4.50
0.00
2.60
0.00
2.60
0.20
0.00
3.10
3.10
0.00
0.00
2.20
0.00
0.00
3.10
3.10
0.00
3.00
3.10
3.10
0.90
4.50
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.55
3.10
1.50
0.00
0.00
2.60
3.10
2.00
2.00
• CIRCUIT VOLTAGE CHART
Page 11
EE PLAY
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
1 2 3 4 5 6 7 8
1.40
3.20
1.60
0.00
0.00
0.00
5.00
0.00
3.10
3.10
3.10
3.10
2.53
4.24
5.00
2.70
3.26
3.10
2.40
3.66
2.40
0.00
2.26
3.10
2.20
1.75
2.20
1.80
2.20
1.25
1.00
5.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.10
1.50
3.10
3.10
3.44
3.12
2.50
2.51
3.50
3.46
3.47
3.47
1.40
0.00
1.75
0.00
3.10
3.10
2.50
2.50
0.00
3.10
3.10
3.10
1.30
4.97
5.00
0.20
2.30
2.50
2.50
2.80
2.50
0.00
2.00
3.10
2.40
1.90
1.80
1.80
2.20
1.30
1.10
5.00
2.25
1.60
1.50
1.50
1.50
1.50
1.50
1.50
1.50
2.60
1.50
3.10
3.10
3.38
3.40
2.50
2.53
3.44
3.44
3.45
3.44
EE PLAY
MODE
PIN NO.
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 53 54 55 56 57 58 59 60 61 62 63
3.48
3.43
2.52
2.52
2.52
2.52
2.56
2.48
2.98
0.00
4.50
0.00
0.00
4.96
0.00
4.95
5.00
2.52
1.55
4.97
0.00
2.55
2.51
4.90
0.00
0.00
0.00
1.56
3.58
2.62
0.00
2.50
1.55
1.46
1.58
2.52
4.92
4.99
0.00
0.00
3.59
0.00
2.35
2.37
3.51
3.51
0.61
1.67
2.95
4.98
3.48
3.48
3.71
3.75
0.27
3.44
3.41
2.70
2.70
2.60
2.60
2.70
2.50
3.30
0.00
4.58
0.00
0.20
3.85
0.00
4.92
0.00
2.50
1.55
4.93
0.40
2.63
2.56
4.65
0.20
2.60
2.50
2.15
0.00
3.20
2.60
2.60
1.60
1.65
1.64
2.50
4.97
5.00
0.00
0.00
0.00
0.00
0.00
2.30
3.47
3.46
0.00
2.42
2.88
4.93
3.40
3.40
3.70
3.70
0.36
EE PLAY
MODE
PIN NO.
64 2.40 0.90
SERVO
IC2A1 33P3721
Page 12
PRINTED CIRCUIT DIAGRAMS
1. MAIN P.C.BOARD
LOCATION GUIDE
Page 13
LOCATION GUIDE
2. AV JACK P.C.BOARD
4. FRONT P.C.BOARD
LOCATION GUIDE
3. SMPS P.C.BOARD
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