Pioneer a 400 x schematic

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(U) PIONEER

The Art of Entertainment

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PION - 04672

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STEREO AMPLIFIER

A- 4DDX

A -400 X HAS THE FOLLOWING:

ORDER NO.
ARP2 7 2 8

Type Power Requirement Rem: rks
HB AC 220-230 V, 240 V (swil:cl1:ble)'I
YPW AC 220 -230 V, 240 V (switchable)*
HL AC 220-230 V. 240 V (switchable)*

I. Change the connection of the powertransformer's primary Wiring

0 This manual is applicable to A - 400 X/HB, YPW and HL types.

0 For YPW and HL types, refer to page 18.

CONTENTS

1 EXPLODED VIEWS AND PARTS LIST 2
>2. PACKING AND PARTS LIST 5
3. SCHEMATIC DIAGRAMS ~~~~ 6
4. PCB CONNECTION DIAGRAMS 9
5. PCB PARTS LIST 15
6, ADJUSTMENTS '''''' 17
7. FOR HLANDYPW TYPES 18
8. PANEL FACILITIES 19
9. SPECIFICATIONS 20

PIONEER ELECTRONIC CORPORATION

4-1, Meguro IrChome. Meguro-ku, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE INC. R0. Box 1760 Long Beach, Calltorma 90801 US A,
PIONEER ELECTRONICS OF CANADA. INC. 300 Allstate Parkway Markham. Ontario L3H 0P2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keelbergiaan 1, 9120 Melsele. Belgrum

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braesrde, Vlclorra 3195 Australra TEL, [03] 580-99I1

© PIONEER ELECTRONIC CORPORATION 1993

@6712

FJ APR,1993 Printed in Japan

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A-4DOX

1. EXPLODED VIEWS AND PARTS LIST

NOTES:

0 Parts marked by NSP" are generally unavailable because they are not in our Master Spare Parts List

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

0 Parts marked by ©" are not always kept in stock. Meir delivery time may be longer than usual or they may be unavailable

Mark No. Descriptinn Part: No. Mark No. Description Parts No.
1 ROTARY KNOB L (PLS) AAB1160 46 s1 SWITCH ASU1035
2 ROTARY KNOB R (PLS) AA131162 (INPUT SELECTOR)
3 ROTARY KNOB M (PLs) AABIzsI 47 S2 SWITCH ASU1037
4 ~ ----- (REC SELECTOR)
5 KNOB (POWER) AAD1535 A 43 T1 POWER TRANSFORMER AT51279
49 AF COMPLEX ASSY sz4961
6 NAME PLATE (METAL) AAM1oss NSP so POWER SW ASSY sz4964
7 SCREW ABA - 298
s SCREW (STEEL) ABA1009 NSP 51 LED ASS'Y , AWZ4966
9 SCREW (STEEL) ABA1011 NSP 52 SPACER AE01256
10 SCREW (STEEL) ABAIOIG 53 EARTH SCREW A8A1047
54 FUSE CAUTION CARD AAx - 290
11 SCREW (STEEL) ABA1o4s NSP 55 BINDER AEF1004
12 SCREW (STEEL) ABA1050
13 SCREW ABA1082 56 BINDER AEP ~ 215
14 SPRING ABH-osz 57 rrrrrrrrrrrr
NSP 15 DIODE ASSY AWZ4963 53 INSULATION RUBBER AEzmIo
NSP 59 UL CAUTION CARD AAx-als
1e ------------ so WASHER ABE1o1s
17 RIVET ABC-441
18 SHEET AEE1o14 61 NUT NK90FCU
19 ............
20 JOINT ARM AMR2142
21 PUSH KNOB AAD1366
NSP 22 TERMINAL SCREW AXE-031
23 PANEL BASE AM131651
24 INDICATING LENS AMR1160
25 INSULATOR ASSY AMR214o
26 ............
NSP 27 CHASSIS ANA1121
28 FRONT PANEL ANB1557
29 REAR PANEL ANC2084
so BONNET CASE ANE1398
NSP 31 BOTTOM PLATE ANF1031
32 1P AC INLET AKP1115
NSP 33 PCB HOLDER ANCI442
NSP 34 HEAT SINK ANH1264
35 ............
36 SCREW BBT30P060FZK
37 NUTS NK90FZB
33 ............
A 39 FU1 FUSE (T116A) AEK-512
A 40 Q1 TRANSISTOR . M503281
A 41 Q2 TRANSISTOR 14503231
A 42 Q3 TRANSISTOR MSA1302
A 43 Q4 TRANSISTOR MSA1302
A 44 Q5 TRANSISTOR 2504137
A 45 Q6 TRANSISTOR 2504137