Pioneer sx 1250 service manual
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Extracted text from pioneer sx 1250 service manual (Ocr-read)
Page 1
Type Voltage Remarks KCU 120V only CSA {Canada} and UL {U.S.A) approved with de'emphasis selector switch (25psl75ps) HG 22OV and 24OV (Switchable) SEMKO {Sweden), NEMKO (Norwav), DEMKO (Denmark) and El (Finland) approv€d s 1IOV, 12OV,22OV and 240V {Switchable) General export model with de-emphasis selector switch {25pslsops/75psl MODEL SX.125O COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS: When repairing S or HG type, please see the manual on page 101. CONTENTS SPECIFICATIONS FRONT PANEL FACILITIES CONNECTION DIAGRAM CIFCUIT DESCRIPTIONS 4,1 Tuner Section 4.2 Audio Section 5. 6. 7. 8. 4.3 Protection Circuit . .......,. 17 4.4 Power Supply Circuit ....... 18 LEVEL DIAGRAM .,.. .... .. ... 19 BLOCK DfAGRAM . .. . . ....... 20 DlsAssEMBLY. ........22 PARTS LOCATION 8.1 Front Panel View . . ........ 25 4.2 Rear Panel View .........,27 8.3 Top View ........29 8.4 Bottom View ....., 31 8.5 Front View .......33 ADJUSTMENTS 9.1 AM Tuner . .. . 3b 9.2 FM Tuner ...........36 9.3 Power Amplifier ...........38 9.4 Stabilizer ... .. . .... 38 DIALCORDSTRINGING ........ 39 EXPLODED VIEWS . ... . 40 SCHEMATIC DIAGRAMS, P.C. BOARD PATTERNS AND PARTS LISTS 1. 2. 3. 4. 4 6 I 11 14 9. I i I 10. 11. 12. 51 12.1 Miscellaneous-parts II
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'-- \o 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 12.10 12.11 12.12 12.13 12.14 12.15 12.16 12.17 12.18 sx-1 25C, Schematic Diagram Internal Circuitry of Integrated Circuits The Circuit of FM Front End (AWB-023) Tuner Assembly (AWE-0681 De+mphasis Switch Assembty (AWX-099) Equalizer Amplifier Assembly (AWF-021 ) Function Switch Assembly (AWS-094) Flat Amplifier Assembly (AWG-042) 5P Connector Assembly (AWX-062) Control Amplif ier Assembly (AWG-0411 Filter Amplif ier Assembly (AWM-089) Microphone Jack Assembly (AWX-@71 Pourer Amplif ier Assembly (AWH-048) Speakers Switch Assembly (AWS-G}S) Protection Circuit Assembly (AWM-091) Stabilizer Assembly (AWR-l 06) Power Supply Assembly (AWR-I07) PACKING PARTS LIST OF EXPLODED VIEWS . SUPPLEMENTS FOR SX-l250/HG AND SX-1250/5 15.1 Contrast of Miscellaneous-parts .. ........101 15.2 Schematic Diagram for SX-1250/S .....lO3 15.3 Schematic Diagram forSX-l2sOlHG. ..... lOb 15.4 De-emphasis Switch Assembly (AWX-101, for S type) .. .....1O7 15.5 Speakers Switch Assembly (AWS.098, for HG type) ........ 108 15.6 Poriver Supply Assembly (AWR-108, for HG type) .........110 s3 55 56 57 63 64 68 70 75 76 80 83 84 88 90 93 96 98 99 13. 14. 15. I a !