Cambridge Audio Azur 740C, Service Manual

Page 1: ...arth Balanced Frequency Response 20Hz to 20 kHz 0 1dB THD 1kHz 0dBFs 0 0008 THD 1kHz 10dBFs 0 0005 THD 20kHz dBFs 0 001 IMD 19 20kHz 0dBFs 0 0006 Linearity 90dBFs 113dB Total correlated jitter 130pS Crosstalk 1kHz 130dB Crosstalk 20kHz 110dB Output impedance 50 ohms Digital input word widths supported 16 24 bit Digital input word widths supported 16 20 24 bit Digital input sampling frequencies sup...

Page 2: ...ayout Top Side 11 Servo Board Layout Bottom Side 12 Servo Assembly PCB BOM 13 15 DAC Circuit Diagram Supply Connectors 16 DAC Circuit Diagram SPDIF RS232 17 DAC Circuit Diagram Flash Connector Mute 18 DAC Circuit Diagram DSP 19 DAC Circuit Diagram Analogue Stage 20 DAC Board Layout Top Side 21 DAC Board Layout Bottom Side 22 DAC Assembly PCB BOM 23 25 Mains Circuit Diagram 26 Mains Board Layout To...

Page 3: ...s 5 Any unauthorised design alterations or additions will void the manufacturer s warranty furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom 6 When servicing care should be taken to observe the original routing and dressing of the leads and it should be confirmed that they have been returned to normal after re assembly Notes on chi...

Page 4: ...Cambridge Audio Azur 740C CD Player Exploded Diagram To enhance viewing please print to A3 4 ...

Page 5: ...6574 010012E002A01 Azur 740C Front Panel S Artwork AP20101 AP20102 6 PY1275 6574 010012E002 01 Azur 740C Front Panel B Artwork AP20101 AP20102 7 PY1276 9474 001000E041 Azur 740C Control PCB Assy Rev A 8 PY1277 9474 001000E071 Azur 740C Main Power Input PCBA Rev A 9 PY1278 9474 001000E181 Azur 740C Servo PCBA T Type Rev A 10 PY1175 4006 740058E001 740C DAC Module 11 PY940 9692 006002 201 Azur V2 CD...

Page 6: ...R15 10K H0 14 A1 6 GND 8 A0 7 W0 12 L1 3 L0 13 H1 1 W1 4 A2 5 SDA 10 SCL 9 VCC 16 U3 DS1803 5V_SERVO 5V_SERVO 1 2 3 4 5 6 7 8 9 CN6 JST 2MM S9B PH KS 1 2 3 4 5 6 7 8 CN7 JST 2MM S8B PH KS R18 10K R19 10K SEG15 16 SEG14 15 SEG13 14 SEG12 13 SEG11 12 SEG10 11 SEG9 10 SEG8 9 SEG7 8 SEG6 7 SEG5 6 SEG4 5 SEG3 4 SEG2 3 SEG1 2 SEG0 1 SEG16 17 SEG17 18 SEG18 19 COM1 20 COM2 21 COM3 22 COM4 23 NC 24 CN10 L...

Page 7: ...Cambridge Audio Azur 740C CD Player AP19135 3 Front Panel Board Layout Top Side To enhance viewing please print to A3 7 ...

Page 8: ...Cambridge Audio Azur 740C CD Player AP19135 3 Front Panel Board Layout Bottom Side To enhance viewing please print to A3 8 ...

Page 9: ... C21 100nF Ceramic 50V Pitch 5 0mm 9 C3 C4 C8 C10 C12 C14 C19 C22 10uF Miniature 16V Pitch 2 5mm Height 5 2mm 4 C7 C11 C13 C18 TSOP1836SS3V TSOP IR RECEIVER 1 U1 PIC16F877A I P PIC 1 U2 Programme with AP20728 4 Please add version label PY983 DS18030 050 DIGITAL POT 4118 030051E200 1 U3 PIC12C508A I P PIC 1 U4 Programme with AP20231 1 Please add version label PY260 BA6218 CD DRIVER IC 1 U5 PY214 BC...

Page 10: ...100nF R64 10K 5V C58 100nF C57 100nF R42 3K3 C27 0 047uF C26 0 047uF R41 3K3 C60 0 047uF C61 100nF C14 22uF 16V C28 47uF 16V C31 2200pF no stuff C30 2200pF no stuff R38 10K no stuff R37 10K no stuff R40 10R 1 4W NC NC NC NC NC R36 100K no stuff R35 100K no stuff X1 CRYSTAL 16 9344MHz C17 15pF C16 15pF C15 0 047uF NC C18 47uF 16V NC NC NC NC NC NC NC NC NC NC NC NC R43 10K R45 3K3 C24 470pF C25 470...

Page 11: ...Cambridge Audio Azur 740C CD Player AP20195 5 Servo Board Layout Top Side To enhance viewing please print to A3 11 ...

Page 12: ...Cambridge Audio Azur 740C CD Player AP20195 5 Servo Board Layout Bottom Side To enhance viewing please print to A3 12 ...

Page 13: ... 13 14 15 16 17 18 26 27 28 29 30 31 39 43 53 54 55 56 64 65 1011 003016 000 15K 0 125 W Metal Film Resistor 1 R5 1011 503018 000 22K 0 125 W Metal Film Resistor 1 R21 27K 0 125 W Metal Film Resistor 1 R61 47K 0 125 W Metal Film Resistor 5 R9 48 49 50 51 1014 703016 000 56K 0 125 W Metal Film Resistor 2 R52 57 68K 0 125 W Metal Film Resistor 2 R7 1016 803018 000 82K 0 125 W Metal Film Resistor 1 R...

Page 14: ...02 470014 000 100uF 16V Electrolytic 2 C69 85 1102 101014 000 220uF 16V Electrolytic 3 C56 65 84 1102 221014 000 470uF 16V Electrolytic 3 C46 47 83 1102 471014 000 3300uF 25V Electrolytic 1 C50 1102 332024 000 PY474 TA2153FN TOSHIBA RF Amplifier 1 U1 4121 530103 000 PY475 TC9462FG TOSHIBA Digital Servo chip Processor 1 U2 4194 620123 000 PY565 TOSHCDMCU MCU TMP87EP26F 1J15 SOP TOSHIBH 1 U3 4187 26...

Page 15: ... 1600 737282 990 PY027 16 934MHz XTAL Oscillator module 4 pin 1 X3 1600 169343 602 Half size 50ppm as per used on 540 640C 20mm PCB Mount Fuse Holder 1 FU1 4031 050100 001 T2AL 2A delay 20mm Fuse 250V LBC low breaking capacity 1 FU1 4030 618002 001 CRYSTALS MISCELLANEOUS Note resistors capacitors and other generic electronic components are not usually stocked by the manufacturer Please obtain thes...

Page 16: ... C47 100N 50V X7R SM 0805 C128 100N 50V X7R SM 0805 C130 100N 50V X7R SM 0805 C132 100N 50V X7R SM 0805 C134 100N 50V X7R SM 0805 C114 100N 50V X7R SM 0805 C116 100N 50V X7R SM 0805 C124 100N 50V X7R SM 0805 C126 100N 50V X7R SM 0805 C69 100N 50V X7R SM 0805 C142 100N 50V X7R SM 0805 C108 100N 50V X7R SM 0805 C109 100N 50V X7R SM 0805 C103 100N 50V X7R SM 0805 C102 100N 50V X7R SM 0805 C213 100U 3...

Page 17: ...50V X7R SM 0805 R26 10K 0805 R27 10K 0805 1 2 3 U8 A 74VHC32 VCC 3 3V 4 5 6 U8 B VCC 3 3V 10 9 8 U8 C VCC 3 3V 13 12 11 U8 D VCC 3 3V R28 0R 0805 CS8416_RXP0 MULTIPLEXER 1 MULTIPLEXER 2 1E 1 S1 2 1 IN3 3 1 IN2 4 1 IN1 5 1 IN0 6 2 IN3 13 2 IN2 12 2 IN1 11 2 IN0 10 GND 8 2E 15 SO 14 1Y 7 2Y 9 VCC 16 U9 CS8406_TXP 5V_DIG C20 100N 50V X7R SM 0805 SO1_U9 SO2_U9 fs 44 1kHz fs 48kHz min servo spdif pass ...

Page 18: ... 32 A10 31 CE 30 IO7 29 IO6 28 IO5 27 IO4 26 IO3 25 GND 24 IO2 23 IO1 22 1 O0 21 A0 20 A1 19 A2 18 A3 17 U32 AT49BV002AN 3 3V DSP 1 2 3 CN7 2MM 3W ST HEADER R72 100R 0805 SERVO_SPDIF_OUT C160 100N 50V X7R SM 0805 C164 100N 50V X7R SM 0805 R140 62R 2W 10V UNREG R141 4K7 0805 R142 10K 0805 R143 100K 0805 C212 10U 35V EL R144 8K2 0805 0805 R145 2K2 0805 D17 1N4001 AC_5V D18 1N4001 D20 1N4148 R146 10K...

Page 19: ...35 PF8 PPI11 36 PF7 SPISEL7 PPI12 37 PF6 SPISEL6 PPI13 38 GND 39 GND 40 GND 41 GND 42 GND 43 GND 44 VDDEXT 45 PF5 SPISEL5 PPI14 46 PF4 SPISEL4 PPI15 47 PF3 SPISEL3 PPI_FS3 48 PF2 SPISEL2 49 PF1 SPISEL1 TMRCLK 50 PF0 SPISS 51 VDDINT 52 SCK 53 MISO 54 MOSI 55 GND 56 VDDEXT 57 DT1SEC 58 DT1PRI 59 TFS1 60 TSCLK1 61 DR1SEC 62 DR1PRI 63 RFS1 64 RCLK1 65 VDDINT 66 DT0SEC 67 DT0PRI 68 TFS0 69 GND 70 VDDEX...

Page 20: ...5V NP C304 10U 35V NP R200 910R 1206 R201 910R 1206 C306 1N5 PP C307 1N5 PP R202 2K7 1206 R203 2K7 1206 3 2 1 8 4 U59 A NE5532 5 6 7 U59 B NE5532 C308 47N 16V ECHU SM C309 47N 16V ECHU SM C310 47N 16V ECHU SM C311 47N 16V ECHU SM R204 1K8 1206 R205 1K8 1206 C312 220pF PP C313 220pF PP R206 2K2 1206 R207 2K2 1206 C314 47N 16V ECHU SM C315 47N 16V ECHU SM 15V 2 15V 2 R208 910R 1206 R209 910R 1206 C3...

Page 21: ... R144 C212 R143 D18 R142 R141 R146 D19 D20 R140 R32 C43 C45 C102 C103 C47 C20 C86 C160 C162 C210 R129 R6 R29 R52 R56 R57 R58 R65 R132 L2 L4 C117 R152 R153 R130 R131 R154 U51 C251 C252 C243 U49 C133 C240 C241 C253 C254 R66 R160 CN10 Q6 R161 Q10 Q12 R163 R164 Q17 R166 Q13 R165 Q18 R167 D24 C134 C110 U17 C51 C52 C49 C62 C63 C65 D22 D23 D2 D21 D25 D26 D27 D28 P2 P4 C189 P3 C68 C183 D29 D30 740C 24 Bit...

Page 22: ...Cambridge Audio Azur 740C CD Player AP20020 2 DAC Board Layout Bottom Side To enhance viewing please print to A3 22 ...

Page 23: ... R144 4K7 Thick film 0 063W 1 0805 3 R52 R131 R141 47R Thick film 1 4W 1 1206 2 R104 R172 1K8 Thick film 1 4W 1 1206 8 R180 R181 R188 R189 R204 R205 R 212 R213 2K2 Thick film 1 4W 1 1206 12 R182 R183 R190 R191 R198 R199 R 206 R207 R214 R215 R222 R223 680R Thick film 1 4W 1 1206 4 R194 R195 R218 R219 2K7 Thick film 1 4W 1 1206 8 R119 R120 R186 R187 R202 R203 R 210 R211 1K Thick film 1 4W 1 1206 4 R...

Page 24: ...12 C241 C252 2 5mm pitch 10U 35V NP Non Polar 5mm diameter 6 C270 C275 C276 C301 C303 C304 2 5mm pitch 47U 16V NP Non Polar 6 5mm dia 2 C271 C302 2 5mm pitch 100U 35V Polar Electrolytic 8mm diameter 7 C16 C25 C46 C104 C105 C137 C213 3 5mm pitch 470U 16V Polar Electrolytic 8mm diameter 1 C5 2200U 35V Polar Electrolytic 16mm diameter 10 C42 C57 C58 C70 C71 C118 C121 C136 BC807 25 PNP BC807 25 SOT23 ...

Page 25: ...Phono Socket AV2 8 4 14 EC 1 CN1 orange insert gold plated Phono Socket AV 8 4 8ES 3 CN3 CN5 black insert gold plated 2x7 Way Vertical Header 2 5mm Pitch 1 CN6 2MM 3W ST HEADER B3B PH KS 2mm Pitch 1 CN7 2MM 8W ST HEADER B8B PH KS 2mm Pitch 1 CN8 2MM 4W ST HEADER B4B PH KS 2mm Pitch 1 CN14 2MM 9W ST HEADER B9B PH KS 2mm Pitch 1 CN9 2 5MM 10W ST HEADER B10B XH A 2 5mm Pitch 1 CN10 Phono Socket AV2 8...

Page 26: ... 7 8 CN1 2 5MM 8W ST HEADER 6 7 8 RL1 C RELAY 1 2 RL1 A RELAY 3 4 5 RL1 B RELAY 1 2 RL2 A RELAY 3 4 5 RL2 B RELAY 6 7 8 RL2 C RELAY ANALOG A ANALOG A ANALOG B ANALOG B GND A GND B DIGITAL DIG GND ANALOG A ANALOG A ANALOG B ANALOG B GND A GND B DIGITAL DIG GND RELAY 10V 1 2 3 4 5 6 7 8 9 10 CN2 2 5MM 10W ST HEADER FROM TRANSFORMER TO DAC OCB TRANSISTOR COLLECTOR 230V 115V Transformer Connections 10...

Page 27: ...Cambridge Audio Azur 740C CD Player AP20024 2 Mains Board Layout Top Side To enhance viewing please print to A3 27 ...

Page 28: ...Cambridge Audio Azur 740C CD Player AP20024 2 Mains Board Layout Bottom Side To enhance viewing please print to A3 28 ...

Page 29: ...Y 2 54MM 1 CN1 AP13570 1 10uH 5A mains inductor 2 L1 2 T68 2A 32 5 TURNS WITH UL HEATSHRINK ME 11 005 RELAY 5V ME 11 2 RL1 RL2 T2AL 2A slow blow fuse 20mm LBC low breaking capacity 1 FU3 4030 618002 001 20MM FUSE HOLDER 3 FU 3 4034 000030 000 FUSE COVER 3 FU 3 4031 050100 001 Cambridge Azur 740C Mains PCB BOM CAPACITORS CONNECTORS MISCELLANEOUS Note resistors capacitors and other generic electroni...

Page 30: ...Cambridge Audio Azur 740C CD Player IC Pin Layout Details TA2153FN Servo PCB U1 TC9462FG Servo PCB U2 30 ...

Page 31: ...MCU TMP87EP26F 1J15 Servo PCB U3 TA2092N Servo PCB U6 7808 Servo PCB U7 7805 Servo PCB U8 DAC PCB U17 U25 U27 U29 U31 U36 C8050D Servo PCB Q7 Q8 Q11 Q12 31 ...

Page 32: ...9014C Servo PCB Q13 C8550 Servo PCB Q9 Q10 9015C Servo PCB Q1 TSOP1836SS3V Front Panel PCB U1 PIC16F877A I P Front Panel PCB U2 32 ...

Page 33: ...DS18030 050 Front Panel PCB U3 PIC12C508A I P Front Panel PCB U4 BA6218 Front Panel PCB U5 BC337 Front Panel PCB Q1 Q2 Q3 Q4 TSOP1836 DAC PCB U1 OP4N25 DAC PCB U2 33 ...

Page 34: ...4011 DAC PCB U3 APRX179AT DAC PCB U4 U5 74VHC14 DAC PCB U6 U15 74VHC153 DAC PCB U7 74HCT153 DAC PCB U9 34 ...

Page 35: ...74VHC32 DAC PCB U8 APTX179AT DAC PCB U10 CS8416CZ DAC PCB U11 CS8406CZ DAC PCB U12 ADSP BF532BSTZ400 DAC PCB U13 35 ...

Page 36: ...7815 DAC PCB U14 U22 U49 U51 7915 DAC PCB U16 U24 LM1117T 3 3 DAC PCB U18 U26 36 ...

Page 37: ...74VHC125 DAC PCB U19 74HCT125 DAC PCB U20 DS1818 DAC PCB U21 74HCU04 DAC PCB U23 LT1963AET DAC PCB U30 AT49BV002AN70TU DAC PCB U32 37 ...

Page 38: ...NE5532AD DAC PCB U55 U56 U59 U60 OP275GS DAC PCB U57 U61 WM8740 DAC PCB U54 U58 BC807 25 DAC PCB Q2 Q8 MPSA14 DAC PCB Q4 Q6 TIP31 DAC PCB Q10 Q11 BC817 25 DAC PCB Q1 Q12 Q13 Q17 Q18 38 ...