Cambridge Audio Azur 840C Service Manual
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Cambridge Audio Azur 840C Service Manual

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See also: Command Manual , User Manual
th
Issue Date: 07
February 2007
SERVICE MANUAL

SPECIFICATIONS:

D/A Converters
Digital Filter
Analog Filter
Frequency Response
THD @ 1 KHz 0dBFs
THD @ 1Khz -10dBFs
THD @ 20 KHz 0dBFs
IMD (19/20 kHz) 0dBFs
Linearity @ -90dBFs
Stopband Rejection
(>24 kHz)
S to N ration, A weighted
Dual Analog Devices
AD1955 24 bit DAC's
Analog Devices Black Fin
ADSP-BF532 32 bit DSP
Performing ATF™
Up sampling to 24 bit 384 kHz
2 Pole Fully Differential
Linear Phase Bessel Filter
20Hz – 20kHz (+\-0.1dB)
<0.0005%
<0.0004%
<0.0007%
<0.0002%
+/- 0.5dB
> 120dB
>113dB
Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
Total correlated jitter
Crosstalk @1kHz
Crosstalk @20kHz
Output impedance
Digital input word
widths supported
Digital output word
widths supported
Digital input sampling
frequencies supported
Digital output sampling
frequencies supported
Audio output up sampling
Dimensions (H x W x D)
Weight
840C
<130pS
<-130dB
<-114dB
<50 ohms
16-24 bit
16, 20, 24 bit
32kHz, 44.1kHz,48kHz,88.2kHz
96kHz, 176.4kHz, 192kHz
32 kHz – 192 kHz pass through
(including 44.1 kHz for CD)
48 kHz, 96 kHz, 192 kHz up sampled
Fixed 24 bit, 384kHz
115 x 430 x 360 mm
(4.5 x 16.9 x 14.7")
8.5kg (18.7lbs)
AP21184/1
1

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Summary of Contents for Cambridge Audio Azur 840C

  • Page 1: Specifications

    840C Issue Date: 07 February 2007 SERVICE MANUAL SPECIFICATIONS: D/A Converters Dual Analog Devices Total correlated jitter <130pS AD1955 24 bit DAC’s Crosstalk @1kHz <-130dB Digital Filter Analog Devices Black Fin Crosstalk @20kHz <-114dB ADSP-BF532 32 bit DSP Performing ATF™ Output impedance <50 ohms Up sampling to 24 bit 384 kHz...

  • Page 2: Table Of Contents

    840C SERVICE MANUAL TABLE OF CONTENTS Safety Precautions & Important Notes Laser Safety Precautions Exploded Diagram Exploded Diagram Parts List Functional Block Diagram Front Panel Circuit Diagram Front Panel PCB Layout (Top Side) Front Panel PCB Layout (Bottom Side) Front Panel PCB BOM Servo Circuit Diagram (DAC) Servo Circuit Diagram (Servo) Servo PCB Layout (Top Side)

  • Page 3: Safety Precautions & Important Notes

    COPYRIGHT NOTICE. © 2007 Audio Partnership PLC. All rights reserved. Cambridge Audio and Azur are registered trademarks for 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

    LASER SAFETY PRECAUTIONS Caution: These labels may be attached to the unit on the rear and inside to inform that it contains a laser component. Use of controls or adjustments, or performance of procedures other than those specified within the service or instruction manual may result in hazardous radiation exposure.

  • Page 11: Front Panel Pcb Bom

    Cambridge Audio Azur 840C Front Panel PCB BOM AP19138/5 AP Part Value Description Factory Part No Component Ident Notes RESISTORS 0.25 W 1% Metal Fil m 0.25 W 1% Metal Fil m R3, R4 100R 0.25 W 1% Metal Fil m...
  • Page 16 Cambridge Audio Azur 840C Servo PCB Assembly BOM AP19969/3 AP Part Value Description Component Ident Factory Part no Notes RESISTORS l a t t s i 0.125 W Metal Film Resistor l a t t s i wirelink is positioned 100R 0.125 W Metal Film Resistor...
  • Page 17 Cambridge Audio Azur 840C Servo PCB Assembly BOM AP19969/3 AP Part Value Description Component Ident Factory Part no Notes MCU TMP87EP26F-1J15 SOP PY565 TOSHCDMCU TOSHIBA fit heatsink to top of driver mount on heatsing using t a l heatsink comound only...
  • Page 21 AP17980/1 Cambridge Audio Azur 840C V2 Voltage Selector PCB Assembly BOM AP Part Value Description Component Ident Factory Part Number Notes CONNECTORS a t l Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally.
  • Page 22 MULTIPLEXER 1 MULTIPLEXER 2...
  • Page 35 AP19132/6 Cambridge Audio Azur 840C DAC PCB Assembly BOM Resistors t s i t s i R3-R5, R21, R23, R26, R27, R37, R39, R41, R56, R86-R88, t s i R130, R135, R142, R146, R154, R161, R165-R167 R6, R7, R15, R16, R17, R20, R22, R24, R25, R33, R38, R40,...
  • Page 36 AP19132/6 Cambridge Audio Azur 840C DAC PCB Assembly BOM C2, C4, C7, C9, C12, C14, C21, C19, C20, C23, C24, C27, C28, C29, C32, C33, C43, C45, C47, C51, C52, C62, C69, C74, C85, C97, C102, C103, C108-C110, C114, C116,...
  • Page 37 AP19132/6 Cambridge Audio Azur 840C DAC PCB Assembly BOM , t r c i t 2MM 3W ST HEADER B3B-PH-KS 2MM 8W ST HEADER B9B-PH-KS 2MM 9W ST HEADER B9B-PH-KS 2,5MM 10W ST HEADER B10B-XH-A CN10 white insert (top)/red insert (bottom), gold Phono Socket vertical dual AV2-8.4-13EL...

  • Page 41: Mains Pcb Bom

    AP19128/2 Cambridge Audio Azur 840C CD Player Mains PCB BOM Component Factory Part AP Part No Value Description Notes Ident CAPACITORS 1n X1/Y1 10mm pitch Polyester Capacitor C1, C2 t i c CONNECTORS IEC-SOCKET 3 Way IEC Connector 2336-003910-002 B10B-XH-A JST 10 Way 2.54mm...

  • Page 42: Ic Pin Layout Details

    Cambridge Audio Azur 840C CD player IC Pin Layout Details TA2153FN Servo PCB (U1) TC9462FG Servo PCB (U2)
  • Page 43 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)
  • Page 44 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) DS18030-050 Front Panel PCB (U3)
  • Page 45 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) 4011 DAC PCB (U3) RX179AT DAC PCB (U4 & U5)
  • Page 46 74VHC14 DAC PCB (U6 & U15) 74VHC153 DAC PCB (U7) 74HCT153 DAC PCB (U9) 74VHC32 DAC PCB (U8) TX179AT DAC PCB (U10) CS8416CZ DAC PCB (U11)
  • Page 47 CS8406CZ DAC PCB (U12) ADSP-BF532BSTZ400 DAC PCB (U13) 7815 DAC PCB (U14, U22, U49 & U51)
  • Page 48 7915 DAC PCB (U16 & U24) LM1117T_3.3 DAC PCB (U18 & U26) 74VHC125 DAC PCB (U19) 74HCT125 DAC PCB (U20) DS1818 DAC PCB (U21)
  • Page 49 74HCU04 DAC PCB (U23) MAX202CSE DAC PCB (U28) LT1963AET DAC PCB (U30) AT49BV002AN70TU DAC PCB (U32) OPA8421D DAC PCB (U33, U34, U37 & U38)
  • Page 50 OPA1632DGN DAC PCB (U35 & U39) OPA2134UA DAC PCB (U40, U41, U46, U50, U52 & U53) LT1761ES5-BYP DAC PCB (U42 & U44) LT1761ES5-2.8 DAC PCB (U43 & U45) 7905 DAC PCB (U47 & U48) AD1955ARS DAC PCB (U130 & U131) BC807-25 DAC PCB (Q2, Q3, Q5, Q7, Q8 &...
  • Page 51 MPSA14 DAC PCB (Q4 & Q6) TIP31 DAC PCB (Q10 & Q11) BC817-25 DAC PCB (Q1, Q12, Q13, Q17 & Q18)

  • Page 52: Circuit Description

    Circuit Description To Follow.
  • Page 53 Gallery Court Hankey Place AP21487/1 London SE1 4BB England Azur 840C CD Player www.cambridge-audio.com Upgrade Software Instructions Introduction The following instructions are a step-by-step guide on how to upgrade the DSP (Digital Signal Processor) chip (Type is Analog Devices ADSP-BF532BSTZ400 and ident on PCB is U13) and the PIC Microcontroller chip (Type is Microchip PIC16F877A-I/P and ident on PCB is U2), inside the 840C CD Player.
  • Page 54 Latest 840C DSP Software (AP20059X 740C-840C DSP software upload file VX.X (6.1.ZZ).bin). Latest 840C PIC Software (AP20058X 840C VX.X.HEX). Note: All the required software can be found on the Service Extranet. Please download and save all software onto your PC or Laptop Hard Drive. Checking Software Version Before you start, you need to make a note of the current version of software installed in the 840C.
  • Page 55 Switch the 840C on using the Power On/Off switch on the rear panel, while pressing and holding the Standby/On button on the front panel. This will then display “DOWNLOAD!” on the front panel LCD. This means the 840C is ready to receive new software.
  • Page 56 If the wrong comm port is selected, please close down the software and repeat the process, from step 6, above. Select the “Load File” button corresponding to “PIC Software Download.” This will then bring up a browse menu. Please locate the latest PIC software (the file extension is .HEX) for the 840C and press “Open.”...
  • Page 57 Now press the “Download Code” button corresponding to “PIC Software Download” to start the process. “Programming PIC Processor…” will now display on the PC screen and the progress bar will start to move. Also “Loading PIC…” will be displayed on the 840C front panel LCD.
  • Page 58 When the process is complete, the program will display the following: Also, the 840C will return to its Standby mode. If at any time during the process, there is a failure, an error message will be displayed. If this occurs, please repeat the steps above. If the problem persists, please seek advice from our servicing department.
  • Page 59 Make sure the 840C is switched off. Repeat steps 1 to 9 for the PIC software above. Note: Please skip step 1 if you already have the PC/Laptop installer program installed. Also make sure you press and hold the Standby/On button while switching on the 840C via the On/Off switch on the rear panel.
  • Page 60 screen and the progress bar will start to move. Also “Loading DSP…” will be displayed on the 840C front panel LCD. When the process is complete, the program will display the following: Also, the 840C will return to its Standby mode. If at any time during the process, there is a failure, an error message will be displayed.
  • Page 61 Testing Repeat the procedure “Checking Software Version” above and note the new software version. This should be the same number as the numbers located on the file names of the HEX and BIN files. In this example the HEX version is 1.1 (see item 10 PIC picture above) and BIN build version is 065 (see item 4 DSP picture above).

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