Pioneer A-550R User manual

Y PIONEER’
The Art of Entertainment
Service
ORDER NO.
ARP2305
STERO AMPLIFIER
A-550R
A-550R-S
A-450R
A—550R, A—550R-—S AND A-—450R HAVE THE FOLLOWING :
Model
* Change the connection of the power transformer’s primary wiring.
Power Requirement
* This manual is applicable to the A — 550R/HE, HEWZ, A — 550R — S/HEWZ, A — 450R/HE and HEWZ
types.
* The A—550R-—S is the same as the A— 550R except for color.
¢ Ce manuel pour le service comprend les explications de réglage en francais.
e Este manual de servicio trata del método ajuste escrito en espanol.
CONTENTS
1. EXPLODED VIEWS, PACKING AND 5. ADJUSTMENT vovseeseeescrttttcsseetseettteeeenies 28
PARTS LIST cosrrtsceteessteecce rete eset eet eeeeeeereeees 2 5B.“ REGILAGE: tesciitacetseceivie leks eons hoiioan ented 29
2. SCHEMATIC DIAGRAM cececccccecrceeteteeeeeee teens 7 BASIS TE 2 seesiieeettegesshdatiesyaaain: buccal a eetyes 30
3. P.C.BOARDS CONNECTION DIAGRAM ------ 12 6. PANEL FACILITIES -----1e-seetrretrttrrtrtrretteee 31
4. PCB’s PARTS LIST -cccecccceerceeteceete tee ete teees 21 7. SPECIFICATIONS -ccccccccc creer ete e teen cere teen eens 33
PIONEER ELECTRONIC CORPORATION = 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive, Markham, Ontario L8R 8E3 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 9120 Beveren, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1991 DX JULY 1991 Printed in Taban’

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

Mark No.
63
64
64
65
65
66
67
68
69
aA 70
A 71
A 72
A 73
A 74
A 75
A 76
A 77
A 78
79
A 80
81
A 82
A 83
84
85
Description
Parts No.
REMOTE CONTROL UNIT
(CU - A001)
BONNET CASE
BONNET CASE (A-550R-S
type)
SCREW
SCREW (A-550R-S type)
SCREW
NUTS
BATTERY COVER
SCREW
AXD1211
AZN1799
AZN1800
BBT30P060FZK
ABA - 274
BBT30P080FZK
NK90OFZB
PZN1001
VMZ30P060FCU
POLYESTER CAPACITOR (C1) CQMXA104J100
FUSE (T2.5A, FU)
TRANSISTOR (Q1)
TRANSISTOR (Q2)
TRANSISTOR (Q3)
TRANSISTOR (Q4)
TRANSISTOR (Q5)
TRANSISTOR (Q6)
AEK-512
2SC3281
2SC3281
2SA1302
2SA1302
2SC4137
2SC4137
CARBON FILM RESISTOR (R3) RD1/4PM010J
SWITCH (S2)
ASU1036
POWER TRANSFORMER (T1) ATS1368
FUSE ASSEMBLY
AWZ3516
CARBON FILM RESISTOR (R1, RD1/4PMF100J
HEWZ type only)
CARBON FILM RESISTOR (R2, RD1/4PMF100J
HEWZ type only)
BINDER
VINYL BAG
AEF1004
AHG-117
1.2 PARTS LIST OF A—450R TYPE
Mark No. Description Parts No.
1 ROTARY KNOB S (BASS, AAB1155
TREBLE)
2 ROTARY KNOBL (VOLUME AAB1i60
CONTROL)
3 ROTARY KNOB R (PLS) AABII162
4 ROTARY KNOB M AAB1237
(REC/INPUT SELECTOR)
5 PUSH KNOB (STANDBY) AAD1246
6 PUSH KNOB C (SPEAKERS, AAD1366
DIRECT, PHONO SELECTOR)
7 PUSH KNOB (SUBSONIC, AAD1536
LOUDNESS)
§ POWER KNOB AAD1984
9 TACT KNOB (MUTING) AAD2003
10 SENSOR WINDOW AAK1783
11 POWER SW ASSEMBLY AWZ3493
12. NAME PLATE (METAL) AAM1029
13. SCREW ABA -298
14. SCREW (STEEL) ABA1009
15 SCREW (STEEL) ABAI011
16 SCREW (STEEL) ABA1016
17 SCREW (HE type only) ABA1047
18 SCREW (STEEL) ABA1048
19 SCREW (STEEL) ABA1050
20 SCREW ABA1082
Die \ tasengivedees
22 SPRING ABH -052
23. SPRING ABH1034
24 NUT ABN -~065
A 25 AC POWER CORD ADG1049
26 CUSHION (RUBBER) AEB1074
27 CUSHION C (RUBBER) AEB -270
28 NYLON BINDER AEC -—093
29 ~=RIVET AEC-441
30 STRAIN RELIEF AEC - 882
Bi - snthengtest
32 LED ASSEMBLY AWZ3495
@ 33. CONTROL ASSEMBLY AWZ3496
34 ROTARY FUNC. ASSEMBLY AWZ3497
35 DRY CELL BATTERY AEX -021
(R03, AAA)
36 STYROL PROTECTOR AHA1335
37 PACKING CASE AHD2132
38 EYE ASSEMBLY AWZ3498
39 PACKING SHEET AHG1016
40 TERMINAL SCREW AKE -031
41 PLUG AKM1004
A 42 AC SOCKET 3-P AKP ~502
43 PANEL BASE AMB1651
44 INDICATING LENS AMR1160
45 INSULATOR ASSY AMR2140
v. «(errr
47 MICA SHEET AEEI014
48 CHASSIS ANA1065

Mark No. Description Parts No. 1.3 PACKING
49 FRONT PANEL ANB1463
50 REAR PANEL ANC1712
51 SHIELD ASSEMBLY AWZ2860
52 BOTTOM PLATE ANF1085
53 PCB HOLDER ANG1198
54 HEAT SINK HOLDER ANG1340
55 PCB HOLDER ANG1580
56 HEAT SINK ANH1333
1 Mee
58 ROD ANR - 879
59 OPERATING INSTRUCTIONS ARE1201
(English, French, German,
Italian, Dutch, Swedish, Spanish,
Portugues) (HE type)
59 OPERATING INSTRUCTIONS ARC1278
(German) (HEWZ type)
60 HEADPHONE ASSEMBLY AWZ3484
@® 61 AF COMPLEX ASSEMBLY AWZ3489
@® 62 TONE ASSEMBLY AWZ3492
63 REMOTECONTROL UNIT AXD1211
(CU-A001)
64 BONNET CASE AZN1799
65 SCREW BBT30P060FZK
66 SCREW BBT30P080FZK
67 NUTS NK90FZB
68 BATTERY COVER PZN1001
69 SCREW VMZ30P060FCU
A 70 POLYESTER CAPACITOR CQMXA473J100
(C1) (HE type)
A 70 POLYESTER CAPACITOR CQMXA104J100
(C1) (HEWZ type)
A 71 FUSE (T2.5A, FU1) AEK-512
A 72 TRANSISTOR (Q1) 2SC3281N
A 73. TRANSISTOR (Q2) 2SC3281N
A 74 TRANSISTOR (Q3) 2SA1264N
A 75 TRANSISTOR (Q4) 2SA1264N
aA 76 TRANSISTOR (Q5) 2SC4137
A 77 TRANSISTOR (Q6) 2SC4137
A 78 CARBON FILM RESISTOR (R3) RD1/4PM010J
79 SWITCH (S2) ASU1036
A 80 POWER TRANSFORMER (T1) ATS1367
81 FUSE ASSEMBLY AWZ3516
A 82 CARBON FILM RESISTOR (R1, RD1/4PMF100J
HEWZ type only) -
A 83 CARBON FILM RESISTOR (R2, RD1/4PMF100J
HEWZ type only)
84 BINDER AEF1004
85 VINYL BAG AHG-117

83 HEWZ type only
1.4 EXTERIOR
78 82 HEWZ type only
A-—550R type only
S&
A-550
type only

cc O n
s) q
tr
O m
.
q
=
c
ro)
o
a
Fe
CN
SSR
gw or
“x
by
y
No
i
x
ios
oO oO
Se
1.4 EXTERIOR
A-—550R type only

A-550R. A-450R |
2. SCHEMATIC DIAGRAM
AF COMPLEX assembly
(AWZ3487:A-550RA)
(AWZ3489: A-450R)
Ic101.
-@104:
A
}PHONO
EO
ue
L101
2704H
OUT
co
cea
IN
TONE assembly (AWZ34914
10601: BUFFER
Q601. 602: MUTE
10601. 602 AC4S5580xXP
Q601- 602 2eSK246
1
851. 852 OTC143ES | | 0601
H
(A-550R ONLY! b
Aa to the A-450A type-refer to page 11.
0601. 602. 607
D603
D605. 606
oe
q
t '
?A-550R) (AWZ3492:A-450R)
AEL1065
AEL1084
1$S252
C115) C17,
39000) re
Pd,
ordalallaal 2a
3
10 26
[29 90999 > > 9}
1 Gu
cs
620
sogoztzv2
7
5 =.
fa
0
C245
330p
Figures enclosed in
)* for A-450RA TYPE.
G20 1-G204. G211- 212. G215-G234. 0237. G238:POWER AMP
+
3!
vat
S |
* C505 6800/50 ACH1189:4-450A
= C506 6800/50 ACH1190:4-450A
er
Ic101 upc4570C(4-S50A)
M5220P( A-450R)
UNSWITCHED
200" MAX
Ti ATS1368(-5550A)
ATS1367(-4550R)
3
(0. 047/100)
[A= a50R/HE |
assembly
Q203-208. 215-218. 2541048
Q305
Q231. 232 2SA1145
G223. 224 2SA1306
G229. 230. 233. 234. 2Sag992
Q238. 291-294
Q306 28C1815
Q@211. 212. 227. 228. 2501845
Q237. 301. 302
Q105. 106 2SC2458
(A-SS5OR ONLY):
Q303. 304. 307 2SC2458
G2e5. 226 2SC2603
Q219. 220 28C2705
Q221. 222 2SC3298
Q101-104 2SK369
(A-550A ONLY!
es rrr
0507
0217-220
0201-202
0307
0101-102
{A-S50R ONLY!
0103
{a-S5OR ONLY).
0209-216. 301-30

I¢101 UPC4570C (A-SSOR}
M5220P( A~450A)
Q203-208. 215-218. 2SA1048
Q305
Q231. 232 2Sat145
Q223. 224 2541306
Q229. 230. 233. 234. 2S5a992
Q238. 291-294
Q306 2SC1815
Q211- 212. 227. 228. 2SC1845
0237. 301. 302
Q10S. 106 2SC2458
{a-5SOR ONLY}.
Q303. 304. 307 2SC2458
Q225. 226 2SC2603
219. 220 2SC2705
Q221. 222 2SC3298
Q101-104 2SK369.
{a-S50R ONLY!
FUSE
assembly
MITCHEO = SWITCHED
OOw MAX © 200W MAX
APOWER TRANSFORMER
cs Ti aTS1368(A~550R)
9,
12199
~~~
ATS1367(474508)
0. 047/400 134
A=450R/HE I} 1
0507 osse20F
0217-220 RO1SESB
(a-550R)
moe. 2881 pes TD)
A-450R) * Ry303-: 6239
0201.
202
RD2.
7ESB4
1
ARESS
Zia"
@}']
0307 AD22ESB :
(a-550A} ' Sate
AO15ESB ' o3e0 ©
{a-450R) y 100 G)
D104.
102
RD7.
SESB2
wo!
Gvaoime
(A-550R ONLY)
D103 188252
(A~550R ONLY]. %
0209-216. 301-306 1SSa52 pyzoa-s 1 S388,
ASAI037 7100
ASA103618
Hoop
7100
RY302-2
3301iw)
R403 AY303-1
EYE
LEO
assembly
AXX1010
assembly |
AatT1015,
ll.
Fy
3 3
es
AR 99999 oo)
ARBeaOG baa pata ac) ee Iay |
(ZRELE)
ROTARY FUNC.
* $901-2 becomes open when SS01-1
not connect to any contact
INPUT SELECTOR
$901
assembly
CONTROL sssembiy (AW25496)
nso: &
330(1w)
rN
Bolo
R902
aa
eit
R304 100K |
ay
SOS 100k
100K
10
SS oe
Gn eee Ne 822
agg jo ver
| So eres |
R970 100k | So eres |
OPEN. when starting
(Large torque!
8 S791!
C918}
270p|
ae: a G
ee ee
Ic902-ICS904:MOTOR DRIVER
Q903. ag04:
vre SELECTION
FOR CHARGING
MOTOR FORCE
za
@909:a922 DRIVER oad
ae eae same soe seas cea ak Deane reese enna seer ee aeeee a
rnd Ee eae
a 5078s
Fry Hei ceo"
918
€)
()
fo)
los24]
fosz6
= ee
iS | ae es ase
vis j age2e:
Po
STANOBY
INO.
ORIVER
of
2
od
Pde
ges
10907
if
3
J
332,
a]
J
ff a el ice toh eee De ean eae evens Simadeokun te ue bee nuke ears eo 1
MEEBO
ONE
SHOT
GENARATOR
WHEN
INPUT
SELECTOR
SW.CHANGES
POSITION
tt
oj
sd
a
8
Lt 2 4
te 4
tL
ro}_10
1c907
ICP-N38
Q902-904.
913.920
DTC124ES
0503.
504
RO18ESB1
ores
1c905
NUM78MS6F
AS
Q901-
909.
921.922
DTC143ES
0915.
943
ROG.
2ESB
{2 Ic901 P0S1654 a907 2SA 1048 0919-926. 938-941 ss5566
of 3 Ic902-904 1A7291S aso2 2SA 1306 0901-914. 916-918. 1SS252
rm agoa. 910-912. 2sc2458 0927-937. 942.944
fo} 3s) a914-919 0949
Yt
@501
2SC3298
0505.
506
1162
1
ag23 2801913 J
i -
9)
44
'
| REMOTE
0939
RELAY
ORIVER
AEZEXEEE)
vis |x|
ik alg
11
12
1. RESISTORS:
Indicated in $2, AW, YeW. t5% tolerance unless otherwise noted k : k3t,
M > M&, (F) 2 21%, (G): 2%, (K) : 210% (M); 20% tolerance
2. CAPACITORS:
Indicated in capacity (uF)/voltage (V) unless otherwise noted p : pF
Indication without voltage is 50V except electrolytic capacitor.
3. VOLTAGE, CURRENT:
(} : Signal voltage at ( we w
} : OC voltage (V) at no input signal
Value in ( ) is DC voltage at rated power.
<> mA: OC current at no input signal
BX2)output (1kHz)
4. OTHERS:
aap : Signal route.
@ : Adjusting point.
The A mark found on some component parts indicates the im
portance of the safety factor of the part. Therefore, when replacing,
be sure to use parts of identical designation.
#& marked capacitors and resistors have Parts numbers,
This is the basic schematic diagram, but the actual circuit may vary
due to improvements in design
SWITCHES
POWER SW assembly
S501 POWER
ROTARY FUNC. assembly
S901 ROTARY SW
LED assembly
S902 STANDBY
AF COMPLEX assembly
S101 PHONO SEL MM/MC
(A-550R ONLY)
S701 FUNCTION REC SEL
$702 FUNCTION
S703 DIRECT SW ON/OFF:
TONE assembly
$601 SUB SONIC ON/OFF
(A-550R ONLY)
$602 LOUDNESS
S604 MUT.K
IIEADPHONE assembly
S801-1 SP-A ON/OFF
S$801-2 SP-B ON/OFF
LINE VOLTAGE SELECTION
Line voltage can be changed with the following steps.
1. Disconnect the AC Power cord.
2. Remove the top cover.
3. Change the connection of the power transformer primary
pins.
Voltage Power transformer Pin No.
220V 3
240V 5
4. Stick the line voltage label on the rear panel.
Part No. Description
AAX—193 220V label
AAX-— 192 240V label
12
D

picid.
Q101-G104:
PHONO EG AMP
e Parts with asterisk (
as follows ;
AF COMPLEX ASSEMBLY
Q101-Q104
Q105, Q106
D104, 0102
0103
0217-0220
0307
$101
RY301, RY302
£101, L102
L103 -L106
L107, L108
C104, C102
C103, C104
C105, C106
C107, C108
C113, Cr14
C117, C118
C123, C124
C125, C126
C127. C128
C135, C136
C137, C138
C139, C140
C139, C140
C244
c506
C507
C725
C726
A-S65OR end
A-S550R-S
AWZ3487 AWZ3489
Upc4s70c
2SK369
28C2458
RO7,5ESB2
1$S262
ROTSESB
RO22ESB
ASG1012
ASH1037
ATH1010
VACANT
LAU3R3K
CETXA103J50
CCCSL27 1450
CKCY8472K50
CEXA101M25
CEANP220M10
CEXA221M26
VACANT
VACANT
CCCSL101/50
CEAS470M 10
CCCSL151J50
CCCSL330J50
CCCSL330J50
CKOYX 104M 25
ACH1078
CQMA103K250
CCOSL22tJ50
CKCYF103Z50
L103 2204
AF
COMPLEX
assembly
(AWZ3489:
A-450R)
L105 220¢H
A-550R. A-450R
C107,
100/710
Te101 12/2)
)* differs according to models
A-450R
M5220P
VACANT
VACANT
VACANT
VACANT
RO8.2ESB1
RO WGESB
VACANT
ASR1038
VACANT
LAU221K
VACANT
VACANT
CCCSL330J50
VACANT
CEASIOIMIO
CEAS4R7M50
CEAS221M26
CEAS100M50
CCCSLIO1J60
CCOSL221N50
VACANT
VACANT
CCDSL330550
CCOSL330J50
CQMA224K50
ACH1190
VACANT
CCCSL221550
VACANT
A~-B560R and
ee ee
R101, R102 ROR V/6PUTO1J VACANT
R105, R106 RD1/8PM472J5 RD1/8PM332J
R107, R108 ROR 1/6PUS63J RO 1/BPM564J
R1IO9—-RI12 RDI/BPM222J VACANT
R113, R114 RD V/8PM3315 VACANT
R115, RVG RD1/8PM153J VACANT
R117, R118 VACANT RD 1/BPM1308J
Rt19, R120 RDR1/4PMERBJ VACANT
R123. Ai24 RD1/8PM820) VACANT
R127, R128 VACANT RD1/8PM152J
R1I3t. R132 RO11/8PM390J AD 1/8PMS60)
R133, R134 ROR 1/6PU3S1S ROR1/6PU471J
R135, R136 RO1/8PM3319 VACANT
R139. R140 RDWU/8PMB21J VACANT
R41, R142 VACANT ROR 1/6PU6635
Rt51, R152
ROM8PM474J VACANT
R163, R154 RO1/8PMS630 VACANT
R155. R156 RD1/8PM335J) VACANT
A215, R216 ADR t/4PMB821J ROR 1/4PM 1025
R223-A226.
R229 -R232 RD1/4PM3923 RO 1/4PM332J
A236. R236,
R253, R264 RD1/BPMt625 AD 1/8PM122)
R287, R288 RD 1/4PMF4R75 RFA 1/4PS4R75
R293, R294 RO1/8PM68 15 RO1/8PMB21J
R310 RO 1/8PM4735 RD1/8PM823J
R312. R317,
R321 ROM/4PM2215 RD1/4PM181J
R329
R733
R734
RD 1/8PM223J
ROV/BPM 1085
RO 1/8PM475J
RD 1/8PM273J
VACANT
VACANT
Ct 16)0120
TONE ASSEMBLY
A-550R and
ee ee
Q60t, A602 2SK246 VACANT
0601
0605, D606
AEL1065
1$$252
VACANT
VACANT
$601
ASG1019 VACANT
C603, C604 CFTXAB2350 VACANT
C635, C636 CCOSL150J50 VACANT
c643 CKCYF103Z260 VACANT
C647, C648 CCCSL820J60 CCDSL390550
R601. R602
R603, R604
R647, AG4B
RO1/8PM124J
RO 1/8PM822J
AD 1/8PM 106)
ROWV/S8PM2245
VACANT
VACANT
HEADPHONE ASSEMBLY
A~550R and
A-5BOA-S
A-450R
RS TLMF6815 ASILMFS619
41

A-550R. A-450R
3. P.C.BOARDS CONNECTION DIAGRAM
NOTE
1.
This
P.C.B
connection
diagram
is
viewed
from
the
parts
mounted
side.
2.
The
parts
which
have
been
mounted
on
the
board
can
be
replaced
with
those
shown
with
the
corresponding
wiring
symbols
listed
in
the
following
Table.
P.C.B.
pattern
diagram
indication
Corresponding
part
symbol
70504.
Eo oO a or Transistor
E E ;
Q215 Radiator type
+
p203 — 0203
©)
°
o—}tq——0
Diode
R237
6
6
o—Wy—o
{C513 \
Capacitor
fe) oF} -o
~ yz (Polarity)
A csie st o| Po
P.C.B. pattern diagram indication
Variable resistor or
Semi-fixed resistor
Capacitor
(Non-polarity)
3.
The
capactor
terminal
marked
with
©)
(double
circles)
shows
negatine
termianl.
4.
The
diode
terminal
marked
with
©)
(double
circles)
shows
cathode
side.
5.
The
transistor
terminal
to
which
E
is
affixed
shows
the
emitter.
12