Pioneer ax 550 service manual

Page 1

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(U) PIONEER

The future of sound and vision.

Scfiice __ ~ 2
Wanna] ' 9

ORDER NO.
ARP1 791
STEREO AMPLIFIER
A-X550 HAS FOLLOWING VERSIONS:
Type Power requirement Export destination
HE AC220V, 240V (switchable) * European continent
HB Ac220v. 240v (switchable) * United Kingdom
HEZ ACZZOV. 240V (switchable) * West Germany

*Change the primary wiring Of the power transformer.

.This manual is applicable to the A-X550/HE and HB types.
.For the HB type, refer to page 38.
.For the other types, refer to additional service manuals.

CONTENTS

EXPLODED VIEW. PACKING AND

PARTS LIST .................................................... 2
2. SCHEMATIC AND

P. c. BOARDS CONNECTION DIAGRAM ------- 6
ELECTRICAL PARTS LISTu- ..

Ic DESCRIPTIONS-nu: -----------
FOR HB TYPE -----
SPECIFICATIONS--
PANEL FACILITIES-~~~ ......

795"?!

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome Megurorku, Tokyo 153 Japan

PIONEER ELECTRONICS SERVICE INC. PO. BOX 1760, Long Beach. Calllornia 90801 USA,

PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive. Markham, Ontario LSR 8E3 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgium

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, BraeSIde. Victoria 3195, Australia TEL [03] 580-9911

© PIONEER ELEcTRONIc CORPORATION 1939 W APR. 1989 PM, in Japan

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A-X550

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1. EXPLODED VIEW, PACKING AND PARTS LIST

NOTES :

- Parts without part number cannot be supplied
. The A. mark found on some component parts indicates the imputance of the safety factor of the part. Therefore. when

replacing, be sure to use parts of identical designation,

- Parts marked by "O" are not always kept in Stock, Their delivery time may be longer than usual or they may be unavailable

1.1 PARTS LIST OF EXPLODED VIEW AND PACKING

Mark No. Part NO. Dascrlptlon Mark NO. Part No. Descnpuon

1 2SA1302 TRANSISTOR 03 SI AWZl'lla TONE ASSEMBLY

2 23A1302 TRANSISTOR O4 52 VR ASSEMBLY

3 2SC3281 TRANSISTOR OT 53 LED ASSEMBLY

4 zscazaI TRANSISTOR O2 54 AW22255 CONTROL MAIN ASSEMBLY
A 5 ATSll35 POWER TRANSFORMER T1 55 -----

a AKM-050 SHORT PI PLUG 56 sznss DAC ASSEMaLv

7 AKMlOlQ JUMPER PLUS 57 AW22257 DACPS ASSEMBLY
A a AKP-502 Ac SOCKET 3vP 58 LAMP AsSEMIaLv
A 9 AER-402 FUSE(TIAI FUG 59 TERMINAL SCREW
A 10 AER-403 FUSE(T2I5A) FUl 60 CHASSIS
A 11 AEK-Aoa FUSEIT2.5A) FU2 51 REAR PANEL

12 ADGlOill AC POWER CORD 62 BOTTOM PLATE

13 AMRI459 INSULATOH ASSEMBLY E3 HEAT SINK

I4 AEEICIA SHEET s4 HEAT SINK HOLDER A

15 ..... 55 HEAT SINK HOLDER a

16 ----- as TRANS HOLDER

I7 ABA-297 SCREW (STEEL) 67 DAcSI-IIELDCASEA

Ia ABA-298 SCREW 65 DAC SHIELD CASE 5

19 ABAIOOO SCREW (STEEL) 69 ABSORBER

20 ABAIOII SCREW (STEEL) 7o -----

21 ABAIOSO SCREW (STEEL) 71 SPACER

22 ABNAOOS NUT 72 PCB SPACER

23 RazzaPOOOFMc SCREW 73 PCB SUPPORT

24 BazzoPOROFZR SCREW 74 CUSHION

25 NKOOFUC NUT 75 CUSHION

26 ANBIzQI FRONT PANEL 76

27 AM81479 PANEL BASE 77

QR AARIaas SENCER ACRYLIC LENS 75

29 AAK1473 LAMP PANEL 79

30 AAKl482 INDICATOR LENs L 80 vOI. PCB HOLDER

31 AAKIAEA INDICATOR LENsR at NAME PLATE

32 AAK1485 INDICATOR LENSA 52 .....

33 AAKldBI DIRECT REC LENS 3:; "AAA" DRII CELL

34 AAKISSO DISPLAY SHEET e4 VINYL SAC

35 AABIOAA VOL ROTARv KNOB as vvvvv

36 AABHJ'ID ROTARY KNOB 86 SHEET

a7 AA01384 DIRECTKNoa

33 AADI386 REC SELECTOR KNOB

39 AAD1564 FUNCTIDN KNOB

40 AREIIIS INSTRUCTION MANUAL

41 AXOIOSS REMOTE CONSOLE UNIT

42 AKXlDal OPTICALCABLE

43 ARA1202 PAD

44 AHO1614 PACKING CASE

45 AZN1802 BONNET COVER

45 ..

47 HEAD PHONE ASSEMBLY

48 AWZ2253 AF MAIN ASSEMBLV

g3 AW22254 SP ASSEMBLY