Fisher BA 3000 Service Manual
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Extracted text from Fisher BA 3000 Service Manual (Ocr-read)
Page 1
SERVICE MANUAL
7%» FISHER
BA-3000
Power Amplifier
The/i131 name in big/[fidelity
U.S.
Page 2
CONTENTS
Functional Block Diagram ............................................... 2
Specification ........................................................ 3
Cabinet & Chassis Exploded View ........................................... 4
Parts List ........................................................... 5
Input Switch P.C.Board .................................................. 6
LED. P.C.Board ...................................................... 6
SP Select P.C.Board .................................................... 6
Parts List ........................................................... 6
Power Supply P.C. Board ................................................. 7
Meter P.C.Board ....................................................... 7
Parts List .......................................................... 7
Power Amp P.C. Board ................................................. 8
Parts List ........................................................... 9
Adjustment of the Power Amp P.C. Board ..................................... 10
Explanation of Protective Circuits .......................................... 10
Point to Point Wiring Diagram .......................................... 11,12
Schematic Diagram .................................................. 13,14
Semiconductor Lead Identification ......................................... 15
Power Amp IC STK007OII Equivalent Circuit .................................. 15
FUNCTIONAL BLOCK DIAGRAM
PEAK L.E.D.
DRIVE AMP
PEAK IND.
METER DRIVE AMP
POWER METER
METER RANGE
sw
POWER AMP SPEAKERS
DC-AC
sw ESVSTEM A
INPUT©-?-
SW I3
PROTECTOR