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 Amark found on some component parts indicates the importance of the safety factor ofthe part. Therefore,when replacing,
be sure to use parts ofidentical designation.
•Parts marked by “<§> ”are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
1,1PARTS LIST OF A- 550R AND A-550R -STYPES
Mark No. Description Parts No. Mark No. Description Parts No.
1ROTARY KNOB S(BASS, AAB1155 26 CUSHION (RUBBER) AEB1074
TREBLE) 27 CUSHION C(RUBBER) AEB-270
1ROTARY KNOB S(BASS, AAB1238 28 NYLON BINDER AEC-093
TREBLE) (A-550R-S type) 29 RIVET AEC-441
2ROTARY KNOB L(VOLUME AAB1160 30 STRAIN RELIEF AEC-882
CONTROL)
2ROTARY KNOB L(VOLUME AAB1161 31
CONTROL) (A -550R-S type) 32 LED ASSEMBLY AWZ3495
3ROTARY KNOB R(PLS) AAB1162 <§) 33 CONTROL ASSEMBLY AWZ3496
3ROTARY KNOB R(A-550R-S AAB1163 34 ROTARY FUNC. ASSEMBLY AWZ3497
•type) 35 DRY CELL BATTERY AEX-021
4ROTARY KNOB MAAB1231 (R03, AAA)
(REC/INPUT SELECTOR)
4ROTARY KNOB MAAB1236 36 STYROL PROTECTOR AHA1335
(REC/INPUT SELECTOR) 37 PACKING CASE AHD2130
(A-550R-S type) 37 PACKING CASE (A-550R-S AHD2131
5PUSH KNOB (STANDBY) AAD1246 type)
5PUSH KNOB (STANDBY) AAD2033 38 EYE ASSEMBLY AWZ3498
(A-550R-S type) 39 PACKING SHEET AHG1016
40 TERMINAL SCREW AKE-031
6PUSH KNOB C(SPEAKERS, AAD1366
DIRECT, PHONO SELECTOR) 41 PLUG AKM1004
6PUSH KNOB C(SPEAKERS, AAD1367 A42 AC SOCKET 3-P AKP-502
DIRECT, PHONO SELECTOR) 43 PANEL BASE AMB1651
(A-550R-S type) 43 PANEL BASE(A-550R-Stype) AMB1652
7PUSH KNOB (SUBSONIC, AAD1536 44 INDICATING LENS AMR1160
LOUDNESS) 45 INSULATOR ASSY AMR2140
7PUSH KNOB (SUBSONIC, AAD1538
LOUDNESS) (A-550R-S type) 46 ARM AMR2142
8POWER KNOB AAD1984 47 MICA SHEET AMR2295
8POWER KNOB (A-550R-S AAD2040 48 CHASSIS ANA1065
type) 49 FRONT PANEL ANB1462
9TACT KNOB (MUTING) AAD2003 49 FRONT PANEL (A-550R-S ANB1477
9TACT 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) ABA1011 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
25 AC POWER CORD ADG1049 961 AF COMPLEX ASSEMBLY AWZ3487
962 TONE ASSEMBLY AWZ3491
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