Pioneer a 502 r service manual

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(I!) mom-:32

The Art of Entertainment

Sefiice

ORDER NO.
ARP2 7 3 9
STEREO AMPLIFIER
A- EDERG -
A- 40 an
A - 502R. A - 502R - G AND A - 402R HAVE THE FOLLOWING :
Type MM Fewer Requirement Remarks
A-502R A-502R-G A-OZR
HEWZ O - O
HE O - 0 AC _ .
H8 0 _ _ 220 V-230 V. 240 V (swnchable)
HEZ - O -

Change the connection of the power transformer's primary wiring.

o This manual is applicable to the following: A -502R/HEWZ, HB. HE; A-502R -G/HEZ: A -- 402R/

HEWZ, HE.
C For the following: A - 502R/HB. HE: A - 502R - G/HEZ: A - 402R/HE, refer to page 24.

CONTENTS

1. EXPLODED VIEWS. PACKING AND PARTS LIST ~~~~~ 2
2. SCHEMATIC AND PCB CONNECTION DIAGRAMS 6

3 PCB PARTS LIST ................................................ 20
4. FOR A-502R/HB. HE. A-502R-G/HEZ AND

AADZR/HE ............. 24
5. IC INFORMATION A 26
a. PANEL FACILITIES . 28
7. SPECIFICATIONS 31

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

PIONEER ELECTRONICS SERVICE INC PO. Box 1760. Long Beach Californla 90801 U. S. A

PIONEER ELECTRONICS OF CANADA. INC. 300 AIlsIaIe Parkway Markham Omario L3H 0P2 Canada

PIONEER ELECTRONIC [EUROPE] N V. Haven 1087 Keetberglaan 1 9120 MeIseIe Belqum

PIONEER ELECTRONICS AUSTRALIAPTV. LTD. 178-184 Boundary Road Braeside Victoria 3195 Australia TEL. [03] 580- 9911

© PIONEER ELECTRONIC CORPORATION 1993 FJ MAY 1993 Pnnted in Japan

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A- 502R, A-4DEFI

1. EXPLODED VIEWS, PACKING AND PARTS LIST

NOTES;

0 Par-ta marked by NSF are generally unavailable because they are not in our Master Spare Parts List.

0 The A mark found on some component parts indicates the nuportance of fire safety factor of the part. Therefore, when replacing,
be sure to use parts of identical designation.

0 Parts marked 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-502R/HEWZ and A-dOZR/HEWZ)

Mark No. Description Part: No. Mark No Description Part: No.
1 Front panel (A-sozR) AN31548 A 35 AC outlet (A-502R) AKP-soz
1 Front panel [A-402R) ANBI550 A 35 AC outlet (xi-4021?.) AKP-508
2 Panel base (PLS) AMBZISS A 36 AC power cord ADG1049
3 Rotary knob L (PLS) M31343 37 AC cord stopper ABC-882
4 Rotary knob S (PLS) M31349 38 Pin jock with plug AKMIOGI
5 Power button (PLS) AAD2421 39 Binder AEP - 215
6 Screw ABA1048 A 40 Power transformer (A-502R) ATSH92
7 LED lens (ABS) PNW2019 A 40 Power ironsiomrr (A-mn) ATSi493
8 Nut NKWFUC 41 Screw ABA1054
9 LED lens (PLS) AAK2459 42 TRANS m'y AWZ4945
in Nut ABN-065 NS? 43 PC support AECl286
11 Remote sensor Mk2457 44 INPUT sssy (A-502R) AW24952
12 Screw ABAIOII 44 mPUT m'y (A-402R) AWZ4955
13 Screw VMZ30P060FCU 45 Heat link (A-SOZR) ANH1428
14 Name plate (MET) MMIOSS 45 Heat sink (A-402R) ANH1266
15 Push button (PLS) AAD2423 46 Screw ABAIOEZ
16 SP switch ossy (A-sozR) sz4944 A 47 Trnnsistor (Q1, Q2) (A_502R) 2503281
16 SP switch usy (ix-40211) AW24948 A 41 Trousisror (Q1, 02) (A-402R) ZSCSISIN
17 Screw ABA-298 A 48 Transistor (Q3, Q4) (A-502R] 2SA1302
15 Motor VOL usy (A-soza) sz4953 A as Transistor (Q3, Q4) (ix-402R) 2SA1264N
1s Motor VOL nasy (A-402R) sz4956 49 Sheet AEE1014
19 Nylon rivet AECI 160 50 """"""""
20 Insulator us'y AMB3140 51 Chamber plate (A-502R) ANGISZO
NS? 21 Chassis ANAIUD NS? 52 Wire clip (A -502R) AEC1388
Z2 VOL board bolder plate ANG1821 NS? 53 Binder (A-502R) AEF1004
NS? 23 PCB support AECl215 54 Holder (A-SOZR) ANG1839
NSP 24 PCB support AEC1232 N SP 55 Tape (A-SOZR) All-1111005
Nsl> 25 PCB support 01231 56 """""""
NS? 26 PCB support AE01216 57 Bonnet case ANE1438
N SP 27 Border AEC1241 58 Fundion button AAD2422
NS? 23 Shield sssy AWZ4954 59 Snow BPZSGPOSOFMC
29 Fuse (m2, TsoomA) (11-50211) AER-505 so CONTROL Issy (A-502R) sz4943
A 30 Fuse (FUl, TLSA) (11-40211) AER-510 so CONTROL ossy (A-402R) sz4947
A so Fuse (FUl, '12A) (A-502R) AER-511 51 Wuhor ABE1018
NS? 31 Fun: cord (18-50211) AAX1581 62 Screw ABA1050
32 AF auy (A-SUZR) AWZ4942 63 Screw ABA1193 {
32 AF assy (A-AOZR) szme 64 Screw ABA1192 E
33 Rear panel (A-SDZR) ANC2074 65 Heat sink bolder A ANGISIS i
33 Rear panel (A-402R) Acho'rs 66 Heat sink holder 13 ANG1819 i
NSP 34 Terminal screw AXE-031 67 Transistor cover LL AN G1840 S
1
68 Screw BBZSOPOGOFZK g
69 PVC usher ABF1030
70 Foot AEC1531
NSP 71 Spacer AEBIZM

NOTE : Screws adjacent to V mark on product
are used for disassembly.