Pioneer sx 1050 service manual

Page 2

991990.?

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11.
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CONTENTS

SPECIFICATIONS .................................................... 4
FRONT PANEL FACILITIES ............................................ 6
CONNECTION DIAGRAM .............................................. 9
BLOCK DIAGRAM .................................................... 11
LEVEL DIAGRAM .................................................... 13
CIRCUIT DESCRIPTIONS
6.1 AM Tuner ........................................................ 14
6.2 FM Tuner ........................................................ 14
6.3 Equalizer Amplifier ................................................ 16
6.4 Buffer Amplifier ................................................... 17
6.5 Tone Control Amplifier .............................................. 17
6.6 Filter Amplifier .................................................... 18
6.7 Power Amplifier ................................................... 19
6.8 Protection Circuit .................................................. 20
6.9 Surge Current Suppressor Circuit ...................................... 21
DISASSEMBLY ....................................................... 22
PARTS LOCATIONS
8.1 Front View 1 ...................................................... 25
8.2 Front View 2 (with Panel Removed) .................................... 27
8.3 Top View ........................................................ 29
8.4 Bottom View ...................................................... 31
8.5 Rear View ........................................................ 33
DIAL CORD STRINGING .............................................. 35
ADJUSTMENTS
10.1 AM Section ...................................................... 37
10.2 FM Section ...................................................... 38
10.3 Power Amplifier Section ............................................ 42
EXPLODED VIEWS .................................................... 44
SCHEMATIC DIAGRAMS, P.C. BOARD PATTERNS AND
PARTS LIST
12.1 Schematic Diagram and Miscellaneous Parts .............................. 54
12.2 Tuner Assembly (AWE-067) .......................................... 59
12.3 Equalizer Amplifier Assembly (AWF-020) ............................... 66
12.4 Function Switch Assembly (AWS-094) .................................. 69
12,5 MIC Jack Assembly (AWX-097) ...................................... 71

12,6 Flat Amplifier Assembly (AWG-O40) ................................... 72