Pioneer spec 1 service manual

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CONTENTS

SPECIFICATIONS ..................................................... 2
FRONT PANEL FACILITIES ............................................ 3
CONNECTION DIAGRAM .............................................. 5
CIRCUIT DESCRIPTION
4.1 Equalizer Amplifier ................................................ 7
4.2 Input Buffer Amplifier .............................................. 8
4.3 Tone Amplifier .................................................... 8
4.4 Filter Circuit ...................................................... 9
4.5 Output Buffer Amplifier ............................................ 10
4.6 Mic Mixing Circuit .................................................. 10
4.7 Muting Circuit .................................................... 10
BLOCK DIAGRAM .................................................... 11
LEVEL DIAGRAM .................................................... 13
DISASSEMBLY ....................................................... 14
PARTS LOCATION . .................................................... 18
EXPLODED VIEWS .................................................... 23
SCHEMATIC DIAGRAMS, P.C. BOARD PATTERNS AND
PARTS LIST
10.1 Schematic Diagram and Miscellaneous Parts .............................. 29
10.2 Input Circuit Assembly (AWF-017) .................................... 33
10.3 Power Supply Circuit Assembly (AWR-094) .............................. 38
10.4 Mixing Amplifier Assemny (AWM-083) ................................. 41
10.5 Filter Amplifier Assembly (AWM-082) .................................. 45
10.6 Fuse Board Assembly (AWX-091) ...................................... 51
10.7 Tone Amplifier Assembly (AWG~035) .................................. 53
PACKING ............................................................ 60
PARTS LIST OF EXPLODED VIEWS ...................................... 61