Pioneer a 550 service manual

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II The above IIIustratIon shows the model A-SSOR. ARP2305 y
STERO AMPLIFIER
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A - 550R, A - 550R - S AND A - 450R HAVE THE FOLLOWING :
{- Model
Type Power Requirement Remarks
A-SSOR A-SSOR-S A-450R
HE r I - O AC220V~230V, 240v ISwitchabIe)
HEWZ ( I I. I O AC220V - 230V, 240V (SwitchableI'
' Change the connection of the power transformer's primary wiring.
r 0 This manual is applicable to the A - 550R/HE, HEWZ, A - 550R - S/HEWZ, A - 450R/HE and HEWZ
types.
0 The A - 550R - S is the same as the A- 550R except for color.
0 Ce manuel pour la service comprend Ies explications de réglage en francais.
0 Este manual de servicio trata deI método ajuste escrito en espafiol.
CONTENTS
I. EXPLODED VIEWS, PACKING AND 5. ADJUSTMENT --------------------------------------- 28
PARTS LIST ............................................ 2 5_ REGLAGE ............................................. 29
2. SCHEMATIC DIAGRAM .............................. 7 5 AJUSTE ................................................ 3O
,- 3. P.C.BOARDS CONNECTION DIAGRAM ------ 12 6. PANEL FACILITIES --------------------------------- 31
4. PCB'S PARTS LIST ................................. 21 7_ SPECIFICATIONS .................................... 33

PIONEER ELECTRONIC CORPORATION 4 I Megu'o I Chome Mcgmo- kt TU'KI/U I53 .LIIMII
PIONEER ELECTRONICS SERVICE INC. PO Box 1760 Long Beach ( FIIIIOII Ia 90801 U. S A

PIONEER ELECTRONICS OF CANADA INC. 505) Cochraue DIIve MdII-(Ilafl Ontam L3R 8i I2I( IMO I
PIONEER ELECTRONIC [EUROPE] N. V. Keethc Iglrmn I 9120 Be. veren BchIum

PMER ELECTRONICS AUSTRALIA PTY. LTD. 178 1811 Bow (1 IW Road BIFICSIOO VII; '0! II3I35. A )SI' dl LIITF. [031 580-9911

© PIONEER ELECTRONIC CORPORATION 1991 [)x JULY 1991 Printed in Japan