Pioneer A-550R Service Manual

A-550R. A-450R
1. EXPLODED VIEWS, PACKING AND PARTS LIST
NOTES:
© The parts with an encircled number are generally unavailable because they are not in our Master Spare Parts List.
¢ The &, mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing,
be sure to use parts of identical designation.
e Parts marked by “@” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
1.1 PARTS LIST OF A—550R AND A-550R-—S TYPES
Mark
No.
Description
Parts
No.
Mark
No.
Description
Parts
No.
1 ROTARY KNOB S$ (BASS, AAB1155 26 CUSHION (RUBBER) AEB1074
TREBLE) 27. CUSHION C (RUBBER) AEB -270
1
ROTARY
KNOB
S
(BASS,
AAB1238
28
NYLON
BINDER
AEC
-
093
TREBLE)
(A-550R
-S
type)
29
-
RIVET
AEC
-
441
2
ROTARY
KNOBL(VOLUME
AAB1160
30
STRAIN
RELIEF
AEC
-
882
CONTROL)
2 ROTARY KNOBL(VOLUME AABI1I61 oP ees
CONTROL) (A -550R-S type) _ 32 LED ASSEMBLY AWZ3495
3 ROTARY KNOB R (PLS) AAB1162 @ 33 CONTROL ASSEMBLY AWZ3496
3 ROTARY KNOB R (A-550R-S AAB1163 34 ROTARY FUNC. ASSEMBLY AW2Z3497
sepa)
35
DRY
CELL
BATTERY
AEX
~021
4 ROTARY KNOB M AAB1231 (RO3, AAA)
(REC/INPUT SELECTOR)
4 ROTARY KNOB M AAB1236 36 STYROL PROTECTOR AHA1335
(REC/INPUT
SELECTOR)
37
PACKING
CASE
AHD2130
(A-550R-S
type)
37.
PACKING
CASE
(A-550R-S
AHD2131
5 PUSH KNOB (STANDBY) AAD1246 type)
5
PUSH
KNOB
(STANDBY)
AAD2033
38
EYE
ASSEMBLY
AWZ3498
(A-550R-S
type)
39 PACKING
SHEET
AHG1016
40
TERMINAL
SCREW
AKE-031
6 PUSH KNOB C(SPEAKERS, AAD1366
DIRECT,
PHONO
SELECTOR)
41
PLUG
AKM1004
6 PUSH KNOBC (SPEAKERS, AAD1367 A 42 AC SOCKET 3-P AKP -502
DIRECT,
PHONO
SELECTOR)
43.
PANEL
BASE
AMB1651
(A-550R-S
type)
43
PANEL
BASE(A-—550R-S
type)
AMB1652
7
PUSH
KNOB
(SUBSONIC,
AAD1536
44
INDICATING
LENS
AMR1160
LOUDNESS)
45
INSULATOR
ASSY
AMR2140
7 PUSH KNOB (SUBSONIC, AAD1538
LOUDNESS) (A-550R -S type) 46 ARM AMR2142
8
POWER
KNOB
:
AAD1984
47
MICA
SHEET
AMR2295
8 POWER KNOB (A-550R-S AAD2040 48 CHASSIS ANA1065
type)
49
FRONT
PANEL
ANB1462
9
TACT
KNOB
(MUTING)
AAD2003
49
FRONT
PANEL
(A-550R-S
ANB1477
9 TACT KNOB (MUTING) AAD2032 type)
(A-550R-S
type)
50
REAR
PANEL
ANC1712
10
SENSOR
WINDOW
AAK1783
51
SHIELD
ASSEMBLY
AWZ2860
11
POWER
SW
ASSEMBLY
AWZ3493
52
BOTTOM
PLATE
ANF1085
12.
NAME
PLATE
(METAL)
AAM1029
53
PCB
HOLDER
:
ANG1198
13
SCREW
ABA
—
298
54
HEAT
SINK
HOLDER
ANG1340
14.
SCREW
(STEEL)
ABA1009
55
PCB
HOLDER
ANG1580
15
SCREW
(STEEL)
ABAIOII1
56
HEAT
SINK
ANH1259
16
SCREW
(STEEL)
ABA1016
57
SUB
HEAT
SINK
ANH1325
17.
SCREW
(STEEL)
ABA1047
58
ROD
ANR
-
879
18
SCREW
(STEEL)
ABA1048
59
OPERATING
INSTRUCTIONS
ARE1201
19
SCREW
(STEEL)
ABA1050
(English,
French,
German,
20
SCREW
ABA1082
Italian,
Dutch,
Swedish,
Spanish,
Portugues)
(HE
type)
21
BUSH
ABF1018
59
OPERATING
INSTRUCTIONS
ARC1278
22
SPRING
ABH
-052
(German)
(HEWZ
type)
23.
SPRING
ABH1034
60
HEADPHONE
ASSEMBLY
AWZ3484
24
NUT
ABN-065
A
25
AC
POWER
CORD
ADG1049
©
61
AF
COMPLEX
ASSEMBLY
AWZ3487
(O)
62
TONE
ASSEMBLY
AWZ3491

Pioneer A-550R Specifications

General

Brand	Pioneer
Model	A-550R
Category	Amplifier
Language	English