Pioneer A-550R Service Manual

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

Pioneer A-550R Specifications

General

Brand	Pioneer
Model	A-550R
Category	Amplifier
Language	English