Cambridge Audio 640C Service Manual
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Cambridge Audio 640C Service Manual

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nd
Issue Date: 22
December 2004
________________________________________________________________________
SERVICE MANUAL
________________________________________________________________________
SPECIFICATIONS:
D/A Converter
Freq response (-0.5dB)
THD
Dynamic Range
Channel Separation
Jitter (correlated)
Digital Outputs
Dimension (mm) (H x W x D)
Weight (kg)
Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
Wolfson
WM8740
24-Bit/192kHz
Capable
10Hz to 20kHz
<-92dB
<105dB
>75dB
<260pS
Opt and Coax
70 x 430 x 310
4.6
640C
AP14839/2
1

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Summary of Contents for Cambridge Audio 640C

  • Page 1 640C Issue Date: 22 December 2004 ________________________________________________________________________ SERVICE MANUAL ________________________________________________________________________ SPECIFICATIONS: D/A Converter Wolfson WM8740 24-Bit/192kHz Capable Freq response (-0.5dB) 10Hz to 20kHz <-92dB Dynamic Range <105dB Channel Separation >75dB Jitter (correlated) <260pS Digital Outputs Opt and Coax Dimension (mm) (H x W x D)

  • Page 2: Table Of Contents

    640C SERVICE MANUAL TABLE OF CONTENTS Safety Precautions & Important Notes Laser Safety Precautions Exploded Assembly Diagram Main Assembly BOM (Silver Unit) Front Panel PCB Schematic Front Panel PCB Layout (Top Side) Front Panel PCB Layout (Bottom Side) Front Panel PCB BOM (Silver Unit)

  • Page 3: Safety Precautions & Important Notes

    COPYRIGHT NOTICE. © 2005 Audio Partnership PLC. All rights reserved. Cambridge Audio and Azur are registered trademarks of Audio Partnership PLC. This document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC.

  • Page 4: Laser Safety Precautions

    4. It is essential that safety and EMC critical components are replaced with Cambridge Audio approved parts only. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc.

  • Page 5: Exploded Assembly Diagram

    9805-064001-000 Azur-340/540/640AC REMOTE CONTROL ASSY PY544 6600-170100-000 FOOT PAD FOR Azur-640A PY568 6564-010006-000A01 Azur-640C.Silver CD DOOR W/SILKSCREEN PMS COOL GREY 7C PY554 6564-010006-000-01 Azur-640C.Black CD DOOR W/SILKSCREEN PMS COOL GREY 7C PY552 3110-064580-100 LCD DISPLAY ISO6458P01V0 113*25.7MM NEGATIVE (BLACK UNIT)

  • Page 6: Main Assembly Bom (Silver Unit)

    POLY ENDCAP PACKAGING AP13505/1 CARTON PACKAGING W/HANDLE PRINTED TO ARTWORK AP13716/1 AP13613/1 CAMBRIDGE AUDIO AZUR WOVEN BAG FOR REMOTE CONTROL PACK REMOTE CONTROL INSIDE, CAMBRIDGE AZUR REMOTE CONTROL COMPLETE. MODEL No RC- MOUNTED INTO POLY ENDCAP 540AC/640AC PACKING IN REBATE PROVIDED AAA ALKALINE BATTERIES FOR REMOTE.
  • Page 7 CAMBRIDGE AUDIO EI 115/230V 540C/640C TRANSFORMER POSITION ON TRANSFORMER PAD WITH FIXING BOLTS THROUGH SUPPLIED HOLES AP13545/1 CAMBRIDGE AUDIO NEW RANGE CD TRANSFORMER CAN WITH ADHESIVE SCREENED WITH ARTWORK PAD ADDED AP13721/1 POSITION ON TOP OF TRANSFORMER AND PRESS TO...
  • Page 8 FIX CORNERS OF BOTTOM PANEL TO PLASTIC INSERTS SIDE PANEL ASSEMBLY AP12725/1 CAMBRIDGE AUDIO NEW RANGE PRESSED SIDE PANEL (2 RIDGE) (SILVER) POSITION IN PLACE ON PLASTIC FRONT INSERTS AP12727/1 CAMBRIDGE AUDIO NEW RANGE FRONT PLASTIC SUPPORT (2 RIDGE WITH POSITION AT FRONT WITHIN SIDE CAPTIVE M2.6 NUTS)

  • Page 9: Front Panel Pcb Schematic

    Cambridge Audio Azur 640C CD Player LCD1 COM0 10uF 10V COM1 COM2 COM3 SEG0 SEG1 100n SEG2 SEG3 SEG4 CONN-H8 SEG5 SEG6 RB5/OSC1/CLKIN SEG7 RB4/OSC2/CLKOUT SEG8 RB3/MCLR/VPP SEG9 RC5/TOCKI SEG10 SEG11 SEG12 16C505 SEG13 SEG14 SEG15 SW-TACT SEG16 CONN-H8 SEG17...

  • Page 10: Front Panel Pcb Layout (Top Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP12992/3 Front Panel PCB Layout (Top Side)

  • Page 11: Front Panel Pcb Layout (Bottom Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP12992/3 Front Panel PCB Layout (Bottom Side)

  • Page 12: Front Panel Pcb Bom (Silver Unit)

    AP13752/3 Cambridge Azur 640C CD Player (Front Panel BOM Silver Unit) AP Part No. DRAWING DESCRIPTION DESIGNATOR COMMENTS AP12993/3 CONTROL/FRONT PANEL PCB ASSEMBLY (FRONT PANEL SWITCH BLUE WITH WHITE PCB) SNAP OFF IDENT 33R 0.25W 1% METAL FILM RESISTOR 330R 0.25W 1% METAL FILM RESISTOR 820R 0.25W 1% METAL FILM RESISTOR...
  • Page 13 AP Part No. DRAWING DESCRIPTION DESIGNATOR COMMENTS AP13438/1 CAMBRIDGE AUDIO NEW RANGE CD DISPLAY SPACER PAD POSITION UNDER THE BACKLIGHT WITHIN THE PLASTIC HOLDER PY562 AP13337/2 CAMBRIDGE AUDIO NEW RANGE CD LCD POSITIVE POSITION ON THE TOP LEDGE WITHIN THE...

  • Page 14: Servo Pcb Schematic

    Cambridge Audio Azur 640C CD Player REMOTE REMOTE PWR DET RESET CONTROL KEYS SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 27R 1W SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 8550 8550 470R 470R SEG5 SEG4 CLOSE OPEN SEG3 +5VDD DRAW DRIVE...

  • Page 15: Servo Pcb Schematic (Power Supply)

    Cambridge Audio Azur 640C CD Player CN21 14.5V FP DIS 100nF 120R 0.5W 100nF IN4004 14.5V IN4004 CN19 7808 7805 RL1:A T2AL AC IN IN4004 IN4004 IN4004 3300uF 25V 470uF 16V 100nF 100nF 470uF 16V 100nF 100nF 100nF 100nF 8050...

  • Page 16: Servo Pcb Layout (Top Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP12927/7 Servo PCB Layout (Top Side)

  • Page 17: Servo Pcb Layout (Bottom Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP12927/7 Servo PCB Layout (Bottom Side)

  • Page 18: Servo Pcb Bom

    AP13752/3 Cambridge Azur 640C CD Player (Servo BOM) AP Part No. DRAWING NO DESCRIPTION DESIGNATOR COMMENTS AP12928/6 SERVO PCB ASSEMBLY Blue with white ident 10R 0.125W METAL FILM RESISTOR 10R 0.25W METAL FILM RESISTOR 27R 1W CARBON RESISTOR 47R 0.125W METAL FILM RESISTOR 100R 0.125W METAL FILM RESISTOR...
  • Page 19 AP Part No. DRAWING NO DESCRIPTION DESIGNATOR COMMENTS 10u 16V ELECTROLYTIC CAPACITOR C69, C82 22u 16V ELECTROLYTIC CAPACITOR 47u 16V ELECTROLYTIC CAPACITOR C9, C10, C18, C20, C28, C29, C65, C70, C74, C77, C78 100u 16V ELECTROLYTIC CAPACITOR 220u 16V ELECTROLYTIC CAPACITOR C56, C84 470u 16V ELECTROLYTIC CAPACITOR C46, C47, C83...

  • Page 20: Dac Pcb Schematic

    Cambridge Azur 540C CD Player +21V UNREG +21V UNREG 7805 7815 7805 1N4002 1N4002 430R 2W 1N4002 47uF 100n 2200uF 47uF POWER 1N4148 10n PE 1N4002 1N4002 RL1:A 10U 25V NP 10n PE 10n PE 1N4148 5V RELAY C8050 100R C9012 330k 2200uF...

  • Page 21: Dac Pcb Layout (Top Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP13111/4 DAC PCB Layout (Top Side)

  • Page 22: Dac Pcb Layout (Bottom Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP13111/4 DAC PCB Layout (Bottom Side)

  • Page 23: Dac Pcb Bom

    Cambridge Azur 640C CD Player (DAC BOM) AP13752/3 AP Part No. DRAWING NO DESCRIPTION DESIGNATOR COMMENTS AP13112/4 WM8740 DAC PCB Blue PCB with white ident 2R2 Resistor 0.125W 1% metal film 22R Resistor 0.125W 1% metal film R2, 24, 25 91R Resistor 0.125W 1% metal film...

  • Page 24: Mains Input Pcb Schematic

    Cambridge Audio Azur 640C CD Player 20MM T1AL 230V earth BROWN X1 10n IEC-SOC 20MM F1AL 115V BLACK CONN-H3 CONN-H3 X1 10n 20MM F1AL BLUE To enhance viewing, please print to A3. AP13637/3 Mains Input Schematic...

  • Page 25: Mains Input Pcb Layout (Top Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP13637/2 Mains Input PCB Layout (Top Side)

  • Page 26: Mains Input Pcb Layout (Bottom Side)

    Cambridge Audio Azur 640C CD Player To enhance viewing, please print to A3. AP13637/2 Mains Input PCB Layout (Bottom Side)

  • Page 27: Mains Input Pcb Bom

    AP13752/3 Cambridge Azur 640C CD Player (Mains Input BOM) AP Part No. DRAWING NO DESCRIPTION DESIGNATOR COMMENTS AP13638/2 MAINS PCB ASSEMBLY BLUE WITH WHITE SILK SCREEN 10n CERAMIC X1 Y2 MAINS RATED CAPACITOR C1,C2 FUSE T1AL FUSE F1AL FU1,FU2 PY091...

  • Page 28: Ic Pin Layout Details

    Cambridge Audio Azur 640C CD Player IC Pin Layout Details Front Panel PCB PIC16C505 (U3)
  • Page 29 DAC PCB WM8740 (U7) NE5532 (U5 & U6)
  • Page 30 74HC14 (U2 & U10) APTX179A (U11) SERVO PCB...
  • Page 31 TA2153FN (U1) TC9462F (U2)
  • Page 32 TLCS-870 MCU (U3)
  • Page 33 TA2092 (U6)

  • Page 34: Silver / Black Differences Bom

    AP13752/3 Cambridge Azur 640C CD Player (Silver - Black Differences BOM) AP PART No. DRAWING NO DESCRIPTION COMMENTS PY557 CAMBRIDGE AUDIO NEW RANGE TOP PANEL (BLACK) POSITIONON TOP OF THE PRODUCT SIDE PANELS PY582 AP12741/1 CAMBRIDGE NEW RANGE CD FRONT PANEL (PUNCHED AND PRINTED)

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