Pioneer a 503 r service manual

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(U) PIONEER

The Art of Entertainment

Service
Manual

A-503R
A-503R-G
A-403R

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

ORDER NO.
ARP2 8 5 3

The illustralon shows model A-SOSR

Type A-503R Aggie A-wan we qummem 3:231:33 comma, by me
HE O - O AC220-230V A024OV, *-
H8 0 - - A024ov A0220 -230v, at
HEWZ O - O Aczzo-zsov A024ov, {-
HEZ - o - Acazo-zsov AC240V, ar-

* : Alter the wiring of the Power-supply block at the primary winding of Power~transformer referring to lhe Line Voltage
Selection" described in Service Manual

0 For the following: A-503R/HB and HEWZ; A-503Fl-G/HEZ; A-403R/HEWZ, refer to page 26.

CONTENTS
1 EXPLODED VIEWS. PACKING AND PARTS LIST 2
2r SCHEMATIC AND PCB CONNECTION DIAGRAMS" 6
3. PCB PARTS LIST 20
4. IC INFORMATION ' 24
5. FOFI A-SOSWHB, HEWZ, A-503FI-G/HEZ AND
A'403MEWZ .......... n. 26
6. PANEL FACILITIES 28
7' SPECIFICATIONS ............................................. 31

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro«ku. Tokyo 153 Japan

PIONEER ELECTRONICS SERVICE INC. PO, Box 1760, Long Beach, Callfomla 90801 USA

PIONEER ELECTRONICS OF CANADA, INC. 300 Allslale Parkway Markham. Onlarro L3H 0P2 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keelberglaan 1. 9120 Melsele Belgrum

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178484 Boundary Road, BraeSIde Victona 3195. Australia TEL' [03] 580-9911

@ PIONEER ELECTRONIC CORPORATION 1994 CW) [$31994 MW, in Japan

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A-503R, A-503FI-G, A-403R

1. EXPLODED VIEWS, PACKING AND PARTS LIST

NOTES:

0 Fans marked by "NSF" are generally unavailable because they are not in our Master Spare Part: lixt.

O The A mark fimnd on some compomnr parts indicare: the importance of the safety ficlor of the part. Therefire, when replacing, be sure to u
use parts of identical desigmman.

0 Parts marlwd by " Q are not always kept in stock, Their delivery time may be longer than usual or they may be unavailable.

1.1 FRONT VIEW AND REAR VIEW ' .
0 Part List (For A-503R/HE and A-403FI/HE)
Mark No. Description Pans No. Mark No. Description Parts No.
1 Front panel (A ~ 503 R) ANEI 820 42 TRANS assy (A -403R) AW25696
1 From panel (A -4()3R) AN51821 NS? 43 Cushion AEC1286
2 Panel base AM132135 44 INPUT assy (A-503R) sz5535
3 Rotary knob (FLS) AABI343 44 INPUT assy (A-403R) szss91
4 Rotary knob (PLS) AABI 349 45 Heat sink (A ~503R) ANH1428
5 Power button (PLS) AAD2421 45 Heat sink (A-403R) ANH1266
6 ------------ 46 Screw ABA1082 /
NSP 7 LED lens (ABS) FNW2019 A 47 Transistor (Q1, Q2) (A-503R) 28C3281
8 Nul NKQOFUC A 47 Transistor (Q1, Q2) (A -403R) 23C3181N
9 LED lens (PLS) AAK2459 A 48 Transistor (Q3, Q4) (A -503R) 23A1302
Io Nut ABN -065 A 48 Transistor (Q3, Q4) (A -403R) ZSA1264N
11 Remocon window (PLS) AAK2457 49 Sheet AEE1014
12 Screw (STEEL) ABAIOII NSF so Shield plate c AEC1538
13 Screw VMZ30F060FCU 51 Chamber frnme (A-503R) ANGls2o
14 Name plate (MET) AAM1058 NS? 52 Wire clip (A-503R) AEC1388
15 Push button (PLS) AAD2423 NSP 53 Screw (A -503R) ABAons
16 SP switch ass'y (A-503R) szsssl 54 Holder (A7503R) ANGI922
16 SP switch assy (A-403R) AWZSS89 NS? 55 Tape (A-SOSR) AEHIOOS
17 Screw ABA-298 56 Screw (STEEL) ABA1009
18 Motor VOL assy (A-503R) szssso 57 Bonnet case ANE1438
18 Motor VOL assy (A -403R) AW25592 58 Function buzlorl (PLS) AAD2422
19 Nylon rivet AECI160 59 Screw BPZSOPOSOFMC
2o Insulalor PNWI9I 2 60 CONTROL assy (A -503R) AWZSSSZ
NSF 21 Chassis ANA1489 60 CONTROL assy (A-403R) AW25590
22 VR PCB holder ANG] 821 61 Washer ABEIOIS
23 PCB Support AEC1215 62 Screw (SIEHJ ABAIOSO
NSF 24 PCB suppon AEC1232 63 Screw (STEELXA-SDZR) ABAIZOS
NSF 25 FCB support AECI23I 64 Screw (STEEL) ABA1192
NS? 26 PCB suppon AEC1216 65 Heat sink holder A (A-Smk) ANGISlS
NS? 27 Barrier AECI 241 66 Heat sink holder B (A -503R) ANGISI9
28 Shield assy AW25583 67 Transistor cover LL (A -503R) AN61840
A 29 Fuse (FU2. TSOOmA) (A -SO3R) AEK-SOS 68 Screw BBTsoFoooFZK
A 30 Fuse (FIJI, TI .6A) (A -403R) AEK -510 69 PVC ring ABF1030
A 30 Fuse (FIJI, T2A) (A ~503R) AEK ~5l1 70 Foot aSSy AEC1531
NS? 31 Fuse card (A-503R) AAXI 581 NS!> 71 Spacer AE31254
32 AF my (A -st) szssso NSF 72 PCB holder (A -503R) ANGIooz
32 AF assy (A-403R) szssss 73 Screw _ ABAIZOO
33 Rear panel (A-sozk) ANC2214 74 Nylon binder AEC-093 _
33 Rear panel (A -403R) ANC2216 75 Ground lead (A -503R) ADX1565
34 Terminal screw AKE-031 A 76 Cut wire (Y6) Y180W0-30-35f35 ,
A 35 Ac socket 3 - P (A - 503R) AKP-SOZ A 77 Cut wire (Y7, Y1 1) YJsow1 - 30 -35r35
A 35 AC socket l -P (A -403R) AKF-sos A 78 Cut wire (Y2) YJSOWI -35 -35/35
A 36 AC power cord ' ADGIO49 A 79 Cut wire (Y9, YIO) YIsow4-3o~35/35
37 Strain relief ABC-882 A 80 Cut wire (Y8) YJSOWS -30-3S/35
3s plug Aleoot A 81 Cut wire (Y1) Y180W9-35 -35n5
39 Binder map-21 5 82 Screw (A -403R) ABA1054
A 40 Power transformer (T1) (A - 503R) AT SI s37 :3 am: 503 A221 2g73
f T1 A - R ATSIS32 4 as at (A- R) A - 5 \
A 2? 593'}??? mm ( ) ( 403 ) NSF 35 Mini cramp AEClsso
42 TRANS assy (A -503R) AWZSSS4