Pioneer a 858 service manual

Page 1

PIONEER?

The future of sound and vision.

Self/ice #_e
Wanna] I, O

Lf==l lml ARP1815

STEREO AMPLIFIER

A-BEB

.This manual is applicable to the A~858/HEZ type.
.For the other types, refer to additional service manuals.

A-858 AND A-71 HAVE FOLLOWING VERSIONS:

Applicable model 4
Type Power requwement Export destmatlon
A-858 A-71
HEZ O - AC220V. 240v (switchable) * West Germany
HB Q - AC220V. 240V (switchable) * United Kingdom
KU/CA - O AC120V only UT 8. A. and Canada

*Change the primary wiring of the power transformen

CONTENTS

EXPLODED VIEW. PACKING

AND PARTS LlST-- -
2. SCHEMATIC AND P..C BOARDS

CONNECTION DIAGRAM ................................. 3
3. ELECTRICAL PARTS LlST-- ------ 21
4. SPECIFICATIONS -------------
5 PANEL FACILITIES ------------

........ 2

...... 26

PIONEER ELECTRONIC CORPORATION 471. Meguro l-Chome, Meguro-ku, Tokyo 153, Japan

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

PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Dnve, Markham, Ontario L3R 8E3 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgium

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, VICIoria 3195, Australia TEL: [03] 580-9911

© PIONEER ELECTRONIC CORPORATION 1989 SA MAY, 1989 Primed in Japan

Page 2

A-858

1. EXPLODED VIEW, PACKING AND PARTS LIST

1.1 PARTS LIST
NOTES :

- Parts without part number cannot be supplied.

- The [2: mark found on some component parts indicates the impotance of the safety factor of the part. Therefore. when
replacing, be sure to use parts of identical designation.

- Parts marked by (9" are not always kept in Stock. Their delivery time may be longer than usual or they may be unavailable.

Mark No. Part No. Descrlptlon Mark No. Part No. Description
A 1 28A1265N TRANSISTOR 0 3 51 AABI 108 ROTARY KNOB (MI
A 2 28A1255N TRANSISTOR 1: 4 62 AA131109 ROTARY KNOB Is)
A 3 28A1265N TRANSISTOR 0 7 63 AADIOTS TACT KNOBIBI
A 4 25A1265N TRANSISTOR 0 a 64 AADIESE PUSH KNOB
A 5 25A1265N TRANSISTOR 011 55 131550 DIRECTKNOB
A 6 2$A1265N TRANSISTOR Q12 55 AADISSI Powgn KNOB
A 7 2SC3182N TRANSISTOR 0 1 67 ANE1187 BONNETCASE
A 8 25C3182N TRANSISTOR 0 2 68 ARE1119 OPERATING INSTRUCTIONS
A 9 2503182N TRANSISTOR O 5 69 AEAIOIO SPACEHSET
A 10 2SC3182N TRANSISTOR 0 6 70 AHA1246 ToP PAD
A II 2503mm TRANSISTOR 0 9 71 AHA1247 BOTTOM PAD
A 12 2503mm TRANSISTOR 010 72 AHDISIB PACKING CASE
A 13 RDRI/APMIOOJ CARBON FILM RESISTOR R1 73 .....
A 14 RDRI/APMIOOJ CARBON FILM RESISTOR R2 74 -----
A 15 ACH1122 CAPACITOR c1 15 SPEAKER SWITCH ASSEMBLY
A Is ACH1122 CAPACITOR c2 76 AWZzSAI TONE AMP AsSEMBLv
A I; §$§ITSZW° sszsg'Tamsagk n 1; New
INPUT SELECTOR AsSEMBLv
A 19 ATSIIQQ POWER TRANSFORMER TI 79 -----
A 20 Ase-553 PUSH SWITCH SI 60 szzau POWER AMPASSEMBLY
21 ASU1021 SWITCH $4 81 sz2325 POWER SUPPLY ASSEMELY
22 ASUIO28 SWITCH 83 82 sz2325 SPEAKER TERM.AssEM3Lv
23 ASU1029 SWITCH 82 53 AW22327 PHONOAMPASSEMBLY
24 AKMIOIS JUMF'ER PLUG 84 HEADPHONE ASSEMBLV
A 25 AER~017 FUSEIT2A) FU3 as TERMINAL
A 25 AEK-OI? FUSE A 27 ADGIOSS AC POWER CORD 87 RIGHT FRAME
28 ANL1023 LONG SHAFT ASSEMBLY as TRANSFORMER FRAME
29 AMRI 158 FOOT 59 LEFT FRAME
30 AMRIISS FOOT 90 REAR PANEL
31 ABEIDOQ WASHER 91 PANELSTAV
32 ABF1017 WASHER 92 BOTTOM PLATE
33 ABHIOSA SPRING (BI 93 HEAT SINK
34 ABHIOSS SPRING (A) 94 HEAT SINK
35 AEC-eaz STRAIN RELIEF 95 HEAT SINK HOLDER
as AMRIITB JOINT 96 VOLUME HOLDER
37 AMRHBO SHEET 97 SHIELD CASE IR)
38 ABA-298 SCREW 96 SHIELD CASE (SP)
39 ABAIOIIA SCREW (STEEL) 99 CUSHION RUBEER 1c)
40 ABA1OOQ SCREW (STEEL) 100 CUSHIONSPACEH
AI AEAIOII SCREW (STEEL) 101 DAMPERSHEETIB)
42 ABA1034 SCREW 102 CUSHION RUBBER
43 ABAIOAT SCREW (STEEL) 103 RUBBER SPACER
44 ABAIOAS SCREW (STEEL) 104 NYLON BINDER
45 ABAIUSD SCREW (STEEL) 1115 BINDER
45 ABAIoaz SCREW 1015 RIVET
47 ABAIOSB SCREW 107 BARRIER g
48 ABN-OAB FLANGE NUT M9 108 SPACER ;
49 ABM-065 UT 109 NYLON RIVET E
50 BBZAOPOBOFZK SCREW 1111 SPACER ;
x
51 BBZAOPIAOFZK SCREW 111 SPACER ¥
52 NKTOFUC NUTS 112 ..... I
53 NKQOFCU NUT 113 CLAMPER
54 vMZSOPOSOFcU SCREW 114 PUSH JOINT
55 WG70FUC WASHER 115 P.c.B HOLDER
56 ANBIQBT FFIDNTPANEL 116
57 AMBIAH PANELBASE 117
58 AAM1029 NAME PLATE 118
59 AMR1160 INDICATING LENS 119
60 AABIIOT ROTARY KNOB 1L1