Pioneer SPEC-2 Manuel d'entretien - Page 50

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Pioneer SPEC-2 Manuel d'entretien

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Table of Contents

Table Of Contents2

Specificat|Ons3

Front Panel Facilities4

Connection Diagram5

Circuit Description6

Power Amplifier6

Power Amplifier Circuit6

Peak Level Meter Circuit7

Current Limiter Circuit7

Equivalent Circuit Of The Logarithmic Compression7

Protection Circuit8

Relay And Lamp Drivers8

Power Switch On Muting8

Block Diagram Of The Protection Circuit8

Power Switch Off Muting9

Impedance Selector Muting9

Temperature Detector9

Relay And Lamp Drivers Circuit9

Dc Balance Detector10

Dc Balance Detector Circuit10

S U R G E C U R R E N T S U P P R E S S O R C I R C U I10

B L O C K D I A G R A11

Adjusting Procedures13

Idle Current Adjustment13

Connection Diagram For Ldle Current Adjustment13

Current Limiter Sensitivity Adjustment14

The Position Of Vr2 And Vr314

Connection Diagram For Current Limiter Sensitivity Adjustment14

Meter Amplifier Adjustment15

Removing The Top Cover16

Removing The Bottom Plate16

Removing The Front Panel17

Removing The Meter Amplifier Assembly18

Removing The Power Amplifier Assembly19

Power Supply Circuit Assembly (Awr-093)20

Power Amplifier Assembly (Awh-045)20

Front Panel View21

Front View With Panel Removed21

Exploded Views23

Nomenclature Of Screws, Washers And Nuts29

Schematic Diagrams, P.c. Board Patterns And Parts List30

Schematic Diagram And Miscellaneous Parts30

Schematic Diagram31

Power Supply Circuit Assembly33

Parts List Of Power Supply Circuit Assembly (Awr-093)36

Parts List Of Power Amplif Ier Assembly (Awh-045)40

Parts List Of Meter Amplif Ier Assembly (Awm-081 )45

Parts List Of Exploded Views48

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