Pioneer A-550R Service Manual - Page 15
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A-550R.
A-450R
4. PCB's PARTS LIST
NOTES:
Part without part number cannot be supplied.
Parts marked by "®" are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
The 4, 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.
When ordering resistors, first convert resistance values into code form as shown in the following examples.
Ex. 1
When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J = 5%,
and K = 10%).
5602 —— SOX IO!
SOD cecscecsssessssssssvseees RDISPMEROS
GK
BT RIO
BTR ink
RDI4PSQOBs
0.52
OR ae: Dec. ls tanraiahtiusanenseladt RN2H © RIG)
K
12
IG. thse ods beccs toa hlecde oeinicdsede RSIPODGK
Ex. 2
When there are 3 effective digits (such as in high precision metal film resistors).
5.62KQ — S62K IO!
S62 coceececcecesssessreeee RNI/ASR
OF
Mark
No.
Description
Parts No.
Mark
No.
Description
Parts No.
POWER
SW ASSEMBLY
@ CONTROL
ASSEMBLY
(AWZ3496)
SEMICONDUCTOR
SEMICONDUCTOR
D956
DIODE
1$$252
IC901
SYSTEM CONTROL
_ PDSI65A
u-COM
RELAY & SWITCH
1C902—904
MECHANISM DRIVER
TA7291S
IC
A
RY91
RELAY
ASR1036
1C905
REGULATOR IC
NJM78M56FAS
A
$501
PUSH SWITCH
ASG1035
1C907
IC PROTECTOR
ICP—N38
TRANS ORME
Q501
TRANSISTOR
253298
A
T951
POWER
ATT1015
Q502
TRANSISTOR
2SA1306
TRANSFORMER
Q901
TRANSISTOR
DTC143ES
Q902—904
TRANSISTOR
DTC124ES
CAPACITOR
Q907
TRANSISTOR
2SA1048
A
C954
CKA (0.01/AC400V)
ACG1002
ee
Spacers
ren
Q909
TRANSISTOR
DTC143ES
RESISTOR
Q910-912
TRANSISTOR
25C2458
R957
CARBON FILM
RD1/2PM270J
Q913
TRANSISTOR
DTC124ES
RESISTOR
Q914~919
TRANSISTOR
2SC2458
OTHERS
Q920
TRANSISTOR
DTC124ES
921, 9
:
cN15
CONNECTOR (3P)
KPE3
oe ee
eas
CN16
CONNECTOR (7P)
KPE7
CN17
CONNECTOR (4P)
KPE4
CN20
CONNECTOR (3P)
KPE3
Be he
pope DIODE
eas
D901-914.
DIODE
1$S252
D915
ZENER DIODE
RD6.2ESB
~9
fee eee MIELY
D916—-918
DIODE
1SS252
SEMICONDUCTORS
D919—926
DIODE
$5566
D927—
D604,981
LED (RED)
AEL1065
ee a
OBE
ae
D942
DIODE
1$S252
SWITCH
D943
ZENER DIODE
RD6.2ESB
$902
SWITCH
ASG1038
D944,949
DIODE
1$S252
COIL
L901
AXIAL INDUCTOR
LAU220K
21