Cambridgeaudio Alpha 2 Alpha 3 Alpha Plus Service Manual
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Extracted text from cambridgeaudio Alpha 2 Alpha 3 Alpha Plus Service Manual (Ocr-read)
Page 1
ARCAM
ALPHA AMPLIFIER
SERVICE MANUAL
(ALL MODELS)
Page 2
ALPHA AMPLIFIER SERVICE MANUAL
ARCAM ALPHA AMPLIFIER SERVICE MANUAL
Issue 2 16/10/91 Arcarn Drawing No. H04/0001
Alpha amplifier s/n 0001 - 5580 Alpha Plus s/n 5581 - 18799
Alpha ll s/n 18800 - 39649 Alpha |I| sln 39650 -
CONTENTS
Clrcult descrlptlon ...................................................
Dlsc lnput ....................................................
Alpha and Alpha Plus ......................................
Alpha II .................................................
Alpha III ................................................
Selector swltch ................................................
Alpha ..................................................
Alpha Plus onwards ........................................
Alpha II and III ...........................................
Llna preamp .................................................
Alpha, Alpha Plus and Alpha ll ................................
Alpha ||| ................................................
Tone controls .................................................
Alpha. Alpha Plus and Alpha ll ................................
Alpha lll ................................................
Mute clrcult and balance control ..................................
Alpha ..................................................
Alpha Plus, Alpha II and Ill ...................................
Preamp power supply ..........................................
All models ...............................................
Power ampllfler ..............................................
Alpha, Alpha Plus and Alpha II ...............................
Alpha III ................................................
Power supply .................................................
All models ...............................................
Alpha Ill ................................................
CHANGE OF MAINS VOLTAGE (ALPHA) ...................................
CHANGE OF MAINS VOLTAGE (ALPHA PLUS, ALPHA ll) ......................
CHANGE OF MAINS VOLTAGE (ALPHA Ill) .................................
RESETI'ING THE OUIESCENT CURRENT ..................................
CIRCUIT DIAGRAMS ..................................................
BOARD MODIFICATIONS ..............................................
6
7
8
9
9