Quad 405 Service Manual 1
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Extracted text from Quad 405 Service Manual 1 (Ocr-read)
Page 1
QUQD 405
POWER AMPLIFIER
Service Data
The Acoustical Manufacturing Co. Ltd (QUHD)
Tel: +44(O)1480 447700 Fax: +44(O)1480 431767
Huntingdon, Cambridgeshire. PE29 6>
wwwquad-hificouk
Page 2
Contents
Circwt Description
Test Equipment
Disconnecting Clamp Circuits
Amplifier Circuit Testing
Clamp Circuit Testing
Fault Finding
Modifications
Clamp Circuit
Replacing a Clamp Board
Conver5ion of a 405 to a Mono 180 watt amplifier
Replacing Transformer
Replacing Amplifier Modules
QUPlD 405-2
Assembly Diagram
Circuit Diagram M12333 iss. 2 7 Amplifier PCB M12368 iss. 5 & 6
Circuit Diagram M12333 iss. 3 7 Amplifier PCB M 12368 iss. 7
Circuit Diagram M12333 ISS. 4 7 Amplifier PCB M 12368 iss. 9
Circuit Diagram M 12333 iss. 5 7 Amplifier PCB M 12368 iss. 9 & 1O
Amplifier Board layout M 12368 iss. 9 & 10
Circuit Diagram M12333 ISS. 6 7 Amplifier PCB M12565 iss. 3
Amplifier Board layout M12565 iss. 3
Circuit Diagram M 12333 iss. 7 7 Amplifier PCB M12565 iss. 5
Circuit Diagram M12333 ISS. 8 7 Amplifier PCB M 12565 iss. 6
Circuit Diagram M12333 iss. 9 7 Amplifier PCB M12565 iss. 7
Circuit Diagram M12333 iss. 1O 7 Amplifier PCB M12565 iss. 7
Keith Snook modifications
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