Cambridge Audio AZUR 351A, Service Manual

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Contents

For your own safety please read the following important safety 

instructions carefully before attempting to connect this unit to the mains 

power supply. They will also enable you to get the best performance from 

and prolong the life of the unit:
  1. Read these instructions.
  2. Keep these instructions. 
  3. Heed all warnings. 
  4. Follow all instructions. 
  5. Do not use this apparatus near water. 
  6. Clean only with a dry cloth. 
  7.  Do not block any ventilation openings. Install in accordance with the 

manufacturer’s instructions.

  8.  Do not install near any heat sources such as radiators, heat registers, 

stoves, or other apparatus (including amplifiers) that produce heat. 

  9.  Do not defeat the safety purpose of the polarized or grounding-type 

plug. A polarized plug has two blades with one wider than the other.  

A grounding-type plug has two blades and a third grounding prong.  

The wide blade or the third prong are provided for your safety. If the 

provided plug does not fit into your outlet, consult an electrician for 

replacement of the obsolete outlet. 

10.  Protect the power cord from being walked on or pinched, particularly 

at plugs, convenience receptacles and the point where they exit from 

the apparatus. 

11.  Only use attachments/accessories specified by the manufacturer. 
12.  Use with only the cart, stand, tripod, bracket, or table 

specified by the manufacturer, or sold with the apparatus. 

When a cart is used, use caution when moving the cart/ 

apparatus combination to avoid injury from tip-over.

13.  Unplug this apparatus during lightning storms or when unused for 

long periods of time. 

14.  Refer  all  servicing  to  qualified  service  personnel.  Servicing  is 

required when the apparatus has been damaged in any way, such 

as the power-supply cord or plug having been damaged, liquid has 

been spilled or objects have fallen into the apparatus, the apparatus 

has been exposed to rain or moisture, does not operate normally, or 

has been dropped.

WARNING 
–  To reduce the risk of fire or electric shock, do not expose this unit to 

rain or moisture. 

–  Batteries (battery pack or batteries installed) shall not be exposed to 

excessive heat such as sunshine, fire or the like.

The unit is of Class 1 construction and must be connected to a mains 

socket outlet with a protective earthing connection.
The unit must be installed in a manner that makes disconnection of 

the mains plug from the mains socket outlet (or appliance connector 

from the rear of the unit) possible. Where the mains plug is used as the 

disconnect device, the disconnect device shall remain readily operable. 

Only use the mains cord supplied with this unit.
Please ensure there is ample ventilation (at least 10cm clearance all 

round). Do not put any objects on top of this unit. Do not situate it on 

a rug or other soft surface and do not obstruct any air inlets or outlet 

grilles. Do not cover the ventilation grilles with items such as newspapers, 

tablecloths, curtains, etc.
This unit must not be used near water or exposed to dripping or splashing 

water or other liquids. No objects filled with liquid, such as vases, shall 

be placed on the unit.

Important safety instructions

Important safety instructions .....................................................................2
Rear panel connections ..............................................................................4
Front panel controls ....................................................................................5
Remote control ............................................................................................6
Connections .................................................................................................7
Technical specifications ..............................................................................9
Troubleshooting ...........................................................................................9
Packaging exploded diagram .................................................................. 10
Front panel exploded diagram ................................................................ 10
Unit exploded diagram ............................................................................. 11
Main PCB Schematics - Tone Circuit ....................................................... 12
Main PCB Schematics - Power Amps ...................................................... 13
Main PCB Schematics - Power Supply .................................................... 14
Main PCB Schematics - iPod Stage......................................................... 15
Main PCB Schematics - Parts for Bom ................................................... 16
Main PCB Gerbers .....................................................................................17
Main PCB BOM ......................................................................................... 18
Main PCB BOM ......................................................................................... 20
Microcontroller PCB Schematics ............................................................. 22
Microcontroller Gerbers ........................................................................... 23
Microcontroller PCB BOM .........................................................................24
USB PCB Schematic ................................................................................. 25
USB PCB Gerber ....................................................................................... 26
USB PCB BOM ...........................................................................................27
IC details ................................................................................................... 29