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Service Manual

CXN

Issue date:  April 2015

Technical specifications 

 Specifications

DAC

 Dual Wolfson WM8740 24-bit DACs

Digital filter

 2nd Generation ATF2 up-sampling to 24-bit/384KHz

Analogue filter

2-Pole Dual Differential Bessel

USB Audio Input

USB Type B conforms to USB Audio profile 1.0 or 2.0 (user selectable) 

and DSD via USB 

Digital audio inputs 

S/PDIF Coaxial and TOSLINK Optical

Compatibility 

UPnP, Local USB media, USB audio 1.0 and 2.0, S/PDIF Toslink and 

Coaxial, Airplay, BT100 Bluetooth receiver (not supplied), Internet radio, 

Spotify Connect

Audio formats

ALAC, WAV, FLAC, AIFF, WMA, MP3, AAC, HE AAC, AAC+, OGG Vorbis

Max power consumption

30W

Standby power consumption

0.5W

Dimensions (H x W x D)

maximum including sockets and controls
85 x 430 x 305mm (3.4 x 16.9 x 12.2”)

Weight

3.5Kg (7.7Lbs)

Summary of Contents for CX N

Page 1: ...r 2 0 user selectable and DSD via USB Digital audio inputs S PDIF Coaxial and TOSLINK Optical Compatibility UPnP Local USB media USB audio 1 0 and 2 0 S PDIF Toslink and Coaxial Airplay BT100 Bluetooth receiver not supplied Internet radio Spotify Connect Audio formats ALAC WAV FLAC AIFF WMA MP3 AAC HE AAC AAC OGG Vorbis Max power consumption 30W Standby power consumption 0 5W Dimensions H x W x D ...

Page 2: ... the property of their respective owners Copyright Cambridge Audio Ltd 2015 Cambridge Audio and the Cambridge Audio logo are trademarks of Cambridge Audio Other brands mentioned are trademarks of their respective owners and are used for reference purposes only Exploded Diagram 3 Front Panel Exploded Diagram 4 Product Assy Exploded Diagram 5 CXN Block Diagram Master 6 CXN Block Diagram Signal Path ...

Page 3: ...3 Exploded Diagram exploded view ref Description Service Part Number 16 remote control CXN CXC CXA PZ804 18 Edimax Wi Fi dongle PZ716 PLEASE NOTE ALL POLYBAGS ARE NOT UK IEC TO PIERCE EPE ...

Page 4: ...12 15 4 3 inch TFT Display PZ786 Complete front panel including metalwork in black PKA013 Complete front panel including metalwork in silver PKA014 22 Knob in black order with insert PKA042 PZ840 22 Knob in silver order with insert PKA042 PZ841 23 Knob insert CXN CXA60 80 PKA042 27 10 7 8 14 11 9 12 16 15 24 13 17 5 3 19 23 1 22 21 20 18 6 2 4 25 26 ...

Page 5: ... 17 11 6 13 12 14 15 16 1 2 5 7 19 18 3 3 exploded diagram ref Description Service Part Number 7 Control Bus PCB PKA011 19 Audio PCB main board PKA010 18 SMPS PCB assy same as SM6 v2 PF505 17 Top cover black PKA015 17 Top cover silver PKA016 ...

Page 6: ...Service Manual 6 CXN CXN Block Diagram Master ...

Page 7: ...7 CXN Block Diagram Signal Path ...

Page 8: ...Service Manual 8 CXN CXN Block Diagram Control Lines ...

Page 9: ...9 CXN Block Diagram Clock Signals ...

Page 10: ...Service Manual 10 CXN CXN Front Panel PCB Schematic ...

Page 11: ...11 Front Panel Top ...

Page 12: ...Service Manual 12 CXN Front Panel Bottom ...

Page 13: ...25 C27 C29 C31 C33 C37 C39 5 0603 100nF 50V X7R 19 C4 C6 C9 C10 C14 C16 C19 C20 C22 C24 C26 C28 C30 C32 C36 C38 C44 10 0603 2 2uF 10V X7R 1 C1 10 0805 4 7uF 50v X7R 1 C2 10 1206 10uF 10V X5R 4 C7 C8 C11 C21 10 0805 22uF 50V Radial Electrolytic 1 C34 061054 RX Series 20 5mm Dia 2mm Pitch 47uF 50V Electrolytic 2 C35 C47 061056 RX Series 20 6mm Dia DIODES WHITE LED Super WHITE 9 D1 D9 KPT 2012VWF A Y...

Page 14: ...Service Manual 14 CXN Audio PCB Schematic Power Supply ...

Page 15: ...15 Audio PCB Schematic USB Circuit Powe Supply ...

Page 16: ...Service Manual 16 CXN Audio PCB Schematic SPDIF I O Reply ...

Page 17: ...17 Audio PCB Schematic USB Streaming PHY ...

Page 18: ...Service Manual 18 CXN Audio PCB Schematic DSP and DIR ...

Page 19: ...19 Audio PCB Schematic Masterclocks ...

Page 20: ...Service Manual 20 CXN Audio PCB Schematic DSP Decoupling SRAM ...

Page 21: ...21 Audio PCB Schematic WM8740 1 2 DACs ...

Page 22: ...Service Manual 22 CXN Audio PCB Schematic MCU and Flash ...

Page 23: ...23 Audio PCB Schematic Ethernet and USB HUB ...

Page 24: ...Service Manual 24 CXN Audio PCB Schematic ZANDER ...

Page 25: ...25 Audio PCB Schematic Apple Test Points and EMC Points ...

Page 26: ...Service Manual 26 CXN Audio PCB Schematic ANALOGUE STAGE ...

Page 27: ...27 Audio PCB Top ...

Page 28: ...Service Manual 28 CXN Audio PCB Bottom ...

Page 29: ... R371 R399 R441 R443 R453 R454 R461 R468 R470 R472 R480 R481 R490 R529 R611 R613 1 0603 33R MNR14 1 RN440 10 MNR14 36R 0603 Thick Film 4 R31 R476 R501 R609 1 0603 39R 0603 Thick Film 9 R14 R336 R338 R393 R395 R400 R482 R484 R608 1 0603 47R 0204 Melf 6 R10 R33 R36 R47 R104 R172 1 0204 47R 0603 Thick Film 10 R116 R178 R285 R293 R298 R299 R463 R528 R530 R702 1 0603 47R 1206 Thick Film 3 R509 R510 R85...

Page 30: ...0603 47k 0805 Thick Film 6 R100 R103 R174 R179 1 0805 68k 0603 Thick Film 1 R150 1 0603 100k 0805 Thick Film 6 R15 R48 R57 R58 R72 R73 1 0805 100k 0603 Thick Film 3 R287 R288 R292 1 0603 470k 0603 Thick Film 5 R53 R167 R168 R173 R175 1 0603 820k 0603 Thick Film 1 R309 1 0603 1M 0603 Thick Film 1 R382 1 0603 CAPACITORS NO FIT 3 C3 C35 C305 NO FIT 2 C19 C237 NO FIT 66 C20 C66 C83 C99 C103 C106 C111 ...

Page 31: ...18 C422 C423 C425 C426 C429 C434 C439 C441 C443 C444 C450 C455 C499 C501 C505 C516 C518 C541 C551 C555 C567 C568 C584 C595 C598 C601 C630 C632 C635 C637 C642 C644 C651 C660 C704 C715 C717 C724 C726 C728 C747 C751 C772 C773 C775 C800 C812 C814 C900 C902 C904 C926 C935 C940 10 0603 100nF 50V 1206 COG 6 C273 C310 C524 C527 C3216C0G1H104J160AA 5 1206 330nF 50V 0805 Ceramic 1 C417 10 0805 1U 16V X5R CE...

Page 32: ...2Z1E9 NFE31 NO FIT 2 L7 L412 COMMON MODE CHOKE 260mA 600OHM 100MHz 1 L8 DLW31SN601SQ2L COMMON MODE CHOKE 300mA 90OHM 100MHz 2 L707 L708 ACM2012H 900 2012 SMD INTEGRATED CIRCUITS TPS2553DBV USB Power Switch 3 U1 U3 U22 TPS2553DBV SOT23 6 PF508 USB 2 0 PHY USB2 0 ULPI PHY W SWITCH 1 U2 USB3340 EZK TR QFN32 5x5mm W PAD PZ713 2k EEPROM 1 U4 24LC02BT I OT SOT23 5 PY1854 NO FIT 1 U5 NO FIT 1 U6 3 1V VOL...

Page 33: ...egulator 1 U419 LM317AT TO 220 3 Pin TH PF510 74LVC00A Quad NAND Gate 2 U421 U804 SN74LVC00APW TSSOP 14 NO FIT 2 U432 U435 NO FIT 1 U433 NO FIT 1 U434 MCU Single Core L1 XMOS 1 U610 XS1 L01A TQ128 C5 TQFP128 PZ405 NO FIT 1 U702 IP4220 USB ESD Protection 2 U709 U711 IP4220CZ6 SOT457 MODULES ZANDER ZANDER STREAMING MODULE 1 M1 AP31999 PZ778 RELAY 5V Coil 2A Contacts Low Power 2P2T 3 RL3 RL5 ME2 5 Th...

Page 34: ...Service Manual 34 CXN BUS PCB Schematic ...

Page 35: ...35 Control BUS Top U20 C32 C1 C2 C5 R95 R23 R24 R96 Q8 Q9 C45 C47 R41 R73 R74 R77 C16 C12 C13 C31 R32 R33 R39 R40 C95 AP33042 2 C34 C35 Audio Partnership PLC 2014 R1 R2 R4 ...

Page 36: ...Service Manual 36 CXN Control BUS Bottom ...

Page 37: ...50V X7R 0603 2 C5 C34 10 0603 100nF 50V X7R 4 C13 C16 C31 C35 10 0603 10uF 10V X5R CER 0805 2 C12 C95 10 0805 CONNECTORS 2 Way Horizontal Gold Plated RCA 1 CN4 AV2 8 4 14 EC Through Hole Mono 3 5mm 3 5mm Jack 1 CN5 CKX 3 5 12 Through Hole DIODES 3mm Red LED IR Demodulator 1 D1 MV50640 INTEGRATED CIRCUITS Opto IC Opto Isolator 1 U3 4N25 DIL06 PY1144 36KHz IR Receiver 1 U10 TSOP34836 Through Hole PY...

Page 38: ...Service Manual 38 CXN Front DAUGHTER PCB Schematic ...

Page 39: ...39 C3 AP33037 2 CN1 C611 C612 C9 FB1 C10 FB425 U100 CA3 R52 R54 R53 L1 CA30 Front Panel DAUGHTER Top PCB ...

Page 40: ...Service Manual 40 CXN C3 AP33037 2 CN1 C611 C612 C9 FB1 C10 FB425 U100 CA3 R52 R54 R53 L1 CA30 Front Panel DAUGHTER Bottom PCB ...

Page 41: ...0 10 1206 CONNECTORS USB Type A Black Insert Socket 1 CN1 18004 X11X102N Horizontal PCB Mount INDUCTORS 120Z 3A Ferrite Bead 0603 2 FB1 FB425 BLM18KG121TN1D 0603 120Z 100MHz COMMON MODE CHOKE 300mA 90OHM 100MHz 1 L1 ACM2012H 900 INTEGRATED CIRCUITS IP4220 USB ESD Protection 1 U100 IP4220CZ6 SOT457 Front Panel DAUGHTER PCB BOM Note Resistors capacitors and other generic components are not usually s...

Page 42: ...Service Manual 42 CXN ENCODER PCB Schematic ...

Page 43: ...43 ENCODER Top Bottom AP33112 2 ...

Page 44: ...5 1 0603 10k 0603 Thick Film 2 R80 R83 1 0603 100k 0603 Thick Film 4 R71 R78 R79 R82 1 0603 CAPACITORS 1nF 50V NP0 0603 3 C57 C75 C78 5 0603 100nF 50V X7R 6 C40 C58 C74 C76 C77 C92 10 0603 TRANSISTORS 45V 500mA NPN Signal 2 Q10 Q11 BC817 25 SOT23 PY1847 MISCELLANEOUS 12mm Shaft No Detent with Push Switch Rotary Encoder 1 ROT1 REB162 9X5 PVBS19FINB1 2 24E PKA040 Note Resistors capacitors and other ...

Page 45: ... NC R5 0R K A R IC3 AZ431AZ A 2 1 3 4 IC2 K1010 R12 560R R13 2 2K C9 104 R14 10K 1 R15 10K 0 25 R16 150K 1 C27 2n2 Y1 BS 1 IN 2 SW 3 GND 4 FB 5 COMP 6 EN 7 SS 8 IC6 MP1423 C24 103 L4 CDRH104RNP 220NC sumida D8 B340A R38 15K 1 R37 10K 1 C23 120PF NPO R36 7 5K 1 C22 4700PF NPO C21 103 R35 NC R34 10K C26 22uF 25V X7 EC15 470U 10 C25 22uF 25V X7 R39 2K 1 1 2 3 4 5 6 7 8 Q4 DMP3020LSS R30 22K Q7 KTC319...

Page 46: ...Service Manual 46 CXN SMPS PCB LAYOUT ...

Page 47: ... Cer Cap 120PF C23 6 Cer Cap 0 001uF C2 C6 C11 C12 C13 C14 1 Cer Cap 0 0047uF C22 3 Cer Cap 0 01uF C7 C21 C24 6 Cer Cap 0 1uF C4 C8 C9 C20 C28 C29 2 1210 Cer X7R 22uF 25V X7 C25 C26 1 Polyester Cap 470nJ100 C3 2 X1 Y1 Mains Rated 471 250VAC C17 C18 1 X1 Y1 Mains Rated 2n2 Y1 C27 2 X2 Mains Rated 0 1U 275VAC X2 C15 C16 1 Cap 2n2J 630V C1 1 Connector 2P3 96 CN3 1 Wire 3P 3 96 Wire CN2 1 Wire 12P 2 5...

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