Pioneer sx 525 service manual

Page 1

(R42- 223- 0)

firuice Manua/

AM / FM STEREO RECEIVER

SX-525/ ch, KUW, szw, NBW, FW

NOTE
MODEL SXv525 COMES IN FIVE VERSIONS DISTINGUISHED AS FOLLOWS:
Round label on
rear panel Voltage Type
KCW 120V only CSA approved (Canada)
KUW 120V only UL approved (USA)
FVZW 5~position selector FTZ approved (West Germany)
NBW 220V only SEMCO (Sweden), NEMCO
(Norway) and DEMCO(Denmark)
approved
FW 5-position selector General export model
with tie-emphasis selector switch

PIONEER®

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10.

SX-SEE

CONTENTS
SPECIFICATIONS ..................................... 3
FRONT PANEL FACILITIES ............................ 5
CONNECTION DIAGRAM ............................... 7

CIRCUIT DESCRIPTION

4-1 Block diagram ....................................... 9
4-2 Main amp unit ....................................... 11
DISASSEMBLY

5-1 Wooden case ....................................... 12
5-2 Frontpanel12
5-3 Bottom plate ....................................... 12

PARTS AND PCB LOCATION ,
6-1 Top View .......................................... 13

6-2 Bottom view ........................................ 13
6-3 Front View ......................................... 14

ALIGNMENT PROCEDURE

7-1 PM IF alignment .................................... 15
7-2 AM,IF alignment ................................... 15
7-3 FMtrackingaiignrnent......................, ........... 15
7-4 Checking of muting function ............................ 16
75 AM, tracking alignment ................................. 16
2-6 MPX decoder alignment ................................ 16
7-7 Checking the SCA filter ................................ 16
7-8 Checking the stereo indicator ............................. 17
DIAL CORD STRINGING ............................... 17
PACKING METHOD AND PART NUMBERS ............... 18

SCHEMATIC DIAGRAMS, PCB PATTERNS
AND PARTS LIST

10-1 Unit connection diagram and miscellaneous parts ............... 19

10-2 Tuner unit (AWE-003) ................................. K3