Cambridge Audio Azur 340-A Service manual

340A

Issue Date: 18th June 2004

________________________________________________________________________

SERVICE MANUAL

________________________________________________________________________ SPECIFICATIONS:

Power Output 40W (into 8Ω) 50W (into 4Ω)

Max Power Consumption 345W

Total Harmonic Distortion 1kHz < 0.009% 20kHz < 0.09%

Frequency Response (-1dB) 5Hz – 50kHz S to N Ration (unweighted) 99dB Slew Rate (into 8Ω) 20V/uS Dimensions (HxWxD)

mm 70 x 430 x 310 Inches 2.8 x 16.9 x 12.2

Weight Kg 6.2

Lbs 13.6

AP15844/1

Gallery Court Hankey Place London SE1 4BB UK

Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233

340A SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions & Important Notes Main Assembly BOM Micro controller PCB Schematic (PIC’s/Switches/LED’s) Micro controller PCB Layout (Top Side) Micro controller PCB Layout (Bottom Side) Front Panel PCB Assembly BOM Main PCB Schematic (Input Select) Main PCB Schematic (Power Amplifiers) Main PCB Schematic (Power Supplies) Main PCB Schematic (Tone Control) Main PCB Layout (Top Side) Main PCB Layout (Bottom Side) Main PCB BOM IC Pin Layout Details Silver – Black Differences BOM

3 4/5 6 7 8 9 10 11 12 13 14 15 16-18 19/20 21

SAFETY PRECAUTIONS & IMPORTANT NOTES

1.Check that the rear of the product indicates the correct supply voltage for you area.

2. The lighting flash with the arrowhead within an equilateral triangle is intended to alert the user or service agent to the presence of dangerous voltages within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

3. The exclamation point within an equilateral triangle is intended to alert the user or service agent to the presence of important operating and maintenance (Servicing) instructions in the literature accompanying the appliance.

4. This product complies with EEC Low Voltage (73/23/EEC) and Electromagnetic Compatibility (89/336/EEC) Directives when used and serviced in accordance with this manual. For continued compliance all components marked safety and EMC critical must only be replaced by Cambridge Audio approved parts.

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 chip component replacement

Never reuse a component that has been removed from a PCB Notice that the minus side of a tantalum capacitor may be damaged by heat

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. Alteration or removal of any trademark, copyright, or other notice from this content is prohibited. Information provided in this document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products.

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Cambridge Azur 340A Main Assembly BOM

AP PART

No.

PY541 AP12652/2 Foot Mouldin PY544 AP12883/3 Foot Pad 4 Affix on Foot Usin

PY638 AP14157/1 Front Panel (Punched And Printed) Silver 1 Extrusion Details AP12738* & Screened With Artwork

DRAWING NO DESCRIPTION QTY COMMENTS

Chassis Assembl

AP14160/1 Bottom Panel 1

Silver 4 Position In Place on Bottom Panel

Adhesive Surface M3 X 8 Plastite Pozi Pan 4 Fix Feet To Bottom Panel. 7mm Plastic Su 7mm Plastic Su

AP14775/1 7mm Plastic Standoff ( S

M3 X 8 Plastite Pozi Pan 6 To hold PCB to S

AP14561/3 Transformer toroidal 230

Transformer bolt M8 56mm thread len Dished transformer Rubber Washer 2 Supplied with Transformer. One is fitted under the

M8 nut 1 Supplied with Transformer. Secures transformer M8

lain washe

M8 lockin

AP15528/1 Cambrid AP14862/2 Insulation Sheet 1 To Be Positioned Over Standoffs Under Power PCB

M4 X 12 Pozi Pan Machine Bolt 1 Fix Throu M4 Nut Standard 1 Used To Fix Above Bolts M4 Lock Washer 1 For Earth Bolts Earth

oint label 1 Place next to earth point bolt on bottom of chassis

PCB Gerber AP1

AP14159/1 Sub Panel 1 Fasten in place between the Ledges of the Front Panel, Align

AP12931/1 Li AP12931/1 Li

AP12935/1 IR Lens 1 Glued In Place On The Front Panel

PCB Gerber AP1

Main PCB Assembly BOM 1 Fixes onto the Bottom Panel With 7mm Plastic Standoffs.

Front Panel Assembl

uide 3 Fasten To Subplate. Input select LEDs uide (half of) 0.5 Fasten To Subplate. Power LED

M3 X 6 Pozi Pan St

M3 X 6 C/S Pozi Machine Screw 7 Fasten The Sub Plate to the Front Panel. Only 7 screws are

IR PCB Assembly (part of F/P PCB assembly) 1 Fitted onto the Front Panel, bom is AP15185/2

ort 9 Push Snap Fit On Bottom Panel ort 4 Resting Under PCB fastened to Bottom Panel

uare Snap - In) 6 Fastening PCB to Bottom Panel

uare snap-in Stand-offs

th 1 Supplied with Transformer. Secures transformer

late 70 mm diam 1 Supplied with Transformer. On top of transformer

transformer and one on the to

1Supplied with Transformer. Secures transformer

washer 1 Supplied with Transformer. Secures transformer

e Toroidal 67mm label 1 Stick to top of dished transformer plate 70 mm diam.

h Earthing Point hole on Bottom Panel

Built to BOM AP15173/2

The Power Button Holes

Screw 4 Affixes Three Lightguide To Subplate

AP14826/1 & AP14828/2

fitted out of a

ossible 8. See drawing AP15536/1

, under dished washe

AP14861/4

asher Nylon M3, 1mm Thk 1 Fitted between Front Panel and IR PCB

M2.6 x 4mm Pan hd Poz Ta

AP12934/1 7mm TAC Switch Cushion 6 Position on the 7mm tact switch Buttons, down the main

AP12925/1 7mm TAC Switch Button 6 Position In Place On The Front Panel AP12926/2 7mm Push Switch Button 2 Fitted to SW1 & 2 on main PCB PCB Gerber AP1

AP12725/2 Pressed Side Panel (2 Ridge) 2 AP12727/1 Front Plastic Support (2 Ridge With Captive

AP12728/1 Rear Plastic Support (2 Ridge With Captive M2.6

AP14162/2 Rear Panel Printed 1 Screened With Artwork AP14830/3

Front Panel & MicroController PCB Assembly BOM M3 X 6 Pozi Pan Machine Screw 7 Used For Fixing The Front Panel Pcb's To The Subplate

Side Panel Assembl

M2.6 Nuts

Nuts M2.6 X 8 C/S Pozi Plastite 8 To Affix Side Panels To Plastic Inserts

Rear Panel Assembl

M3 X 10 Pozi Pan Plastite 8 To fix speaker terminal and Phono sockets connectors to

M4 X 8 Pozi Pan Plastite 2 To fix IEC Power connector to Rear Panel

tite 1 Use to fix IR PCB onto SubPanel

shaft affix usin

1 Fixes onto the Sub Panel With M3 M/C Screws. Built to BOM

AP 15185/2

Standoff's

2 Position at Front within Side Panels

2 Position at Rear within Side Panels

Rear Panel

adhesive provided on the cushion.

AP PART

ging

ybag

ging

No.

PY592 AP10209/3 Cambrid

PY590 AP12750/2 Cambridge New Range Amp Volume Knob Silver 1

PY640 AP14161/1 340A To PY516 M2.6 X 6 C/S Torx Machine Screw (Silver) 8 To Affix Top Panel to plastic Inserts, Side, Rear and Front

DRAWING NO DESCRIPTION QTY COMMENTS

Final assembl

AP11879/3 Opus Control Box Powerswitch 1 Position in Place on the Front Panel AP14819/1 Push Switch Bar Extension 1 Affix and CD4P AB05a Power Bar 1 Fitted to SW3 on main PCB AP15512/1 Front Panel Insulation Sheet 1 Attach to main PCB with two tie-wra

Tie-wra

AP10224/1 Cambrid

AP13361/1 A600 Volume Knob Blue Plastic Insert 1 Insert Into Volume Knob AP13360/1 A600 Volume Knob Aluminium Skin 1 Glued and ta

M3 X 10 Pozi Pan Plastite 4 To fix rear M2.6 X 6 Pozi Pan Machine Screw 12 To fix Bottom Panel To Side, Front And Rear Panels M2.6 x ??? 4 To fix Bottom Panel To Side Panels (at corners)

AP14865/1 Cambridge Azur 340A Microcontroller

Cableform

AP14896/1 Cambridge Azur 340A Volume Control

Cableform

AP15204/1 Cambridge Azur 340A Earth Lead 1 From earth pin of IEC Scoket (CN3) on main PCB to Chassis

M4 Nut Standard 1 Used To Fix earth lead to earth stud M4 Lock Washer 1 For above nut LED wireform is attached to main PCB Glue

Liddin

AP13340/1 Lidding Tape For Front And Rear Panels 2 Fix To The Correct Surfaces For Lid AP13342/1 Liddin

Packa

Serial Number Label, Blank (6.5X35.5mm) 1 print with serial number label and attached to rear panel

s (plastic ties) Width 2.5mm 2 Attach insulation strip to main PCB

e Selector Knob Mk3 Silver 3 e Knob Insert Mk2 3 Insert Into Selector Knobs

1 From Main PCB J2 to Front Panel PCB CN2

1 From Front Panel PCB CN5 to Volume Pot Motor

earth stud

Tape For Side Panels 2 Fix To The Correct Surfaces For Lid

Panel (Silver) 1 Position Top Of The Product

Panel

lue to Power Bar

ed In Place On Volume Knob

anel to side panels

ower LED into light-guide

AP13612/1 Azur 2 Rid AP13504/2 Pol AP13613/1 Azur Woven Ba

Azur Remote Control Complete. Model No RC340AC/540AC/640AC AAA Alkaline Batteries 3 For Remote. Place In Instruction Manual Pol

PY637 AP15509/1 340A Amp Instruction Manual 1

Pol 1830mm AC IEC Power Cord Set BS Standard Fused 3 AMP

AP13505/1 Carton Packa AP14696/1 Carton Label (Model No.) 1 For Bo

Blue Tape Seal For Cambridge Carton 1

NOTES:

Issue 1 - 15.03.2004

Issue 2 - 23.04.2004

e Woven Ba

Endcap Packagin

For Remote Control 1 Pack Remote Control Inside,

173X260X4C mm 1 For Instruction Manual and Remote Batterie

With Handle 1 Printed To Artwork AP13716/1

1 Pack 340A Unit Inside 2

1 Fit into Poly Endcap, buttons to face polystyrene, Packing in

Rebate Provided

1 Must Be Bs Approved

Cambridge Azur 340A Intergrated Amplifier

To enhance viewing, please print to A3 6

+5V +5V

6 mA

AUX/PHONO CD TUNER/DAB

CHANNEL LEDD2CHANNEL LEDD3CHANNEL LEDD4CHANNEL LEDD5CHANNEL LED

220R

DVD AV/MD

CRS1

DGND

220R

TAPE MON

CHANNEL LED

FREQ=4MHz

CN1

Vpp

Data I/O

CLK +5V GND GND

ICP

SW1

AUX/PHONO

+5V

100K

IN-CIRCUIT PROGRAMMING CONNECTOR

1 2 3 4 5 6

DGND

MCLR/Vpp

RA0

RA1

RA2

RA3

RA4

RA5

Vss2

OSC1

OSC2

RC0

RC1

RC2

RC3

PIC16F72

PORT B HAS WEAK PULLUPS 250uA typ

MUTE

OUTPUT RELAY

SW2

SW3

TUNER/DAB

+5V

100n

SW4

DGND

HI = NORMAL

DC OFFSET

+5V

vol up vol down

SW5

AV/MD

DGND

IR IN

SW6

TAPE MON

strobe data

DVD

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0

Vdd

Vss

RC7

RC6

RC5

RC4

DGND

OUTPUT RELAY

+5V

100n

MUTE strobe

clockclock

+5V

47R

3 2 1

data

DGND

CN3

CN4

3 2

CN2

8 7 6 5 4 3 2 1

H8 2.54mm 90

CONN-H3

CONN TO MAIN PCB

47u 16V

BA6218

VOLUME POT

MOTOR CONTROL

GND1

GND2

OUT2

OUT1

COM

VCC

FIN

RIN

1 2 3

TSOP18 IR RECEI

IR RECEIVER

TSOP1835/37

+5V

1 2 3 4 5 6 7 8 9

DGND

OPT

GND

+5V

100n

10U 16V SM EL

vol up

vol down

CN5

100n

H2 2.54mm 90

TO MOTOR

AP14518/1 Microcontroller PCB Schematic (PIC's/Switches/LED's)

Cambridge Azur 340A Intergrated Amplifier

To enhance viewing, please print to A3 7

AP14518/1 Microcontroller PCB Board Layout (Top Side)

+ 14 hidden pages