Pioneer a 757 service manual

Page 1

Q4) PIONEER

The tuture of sound and vision.
r
I,
ORDER NO.
ARP 1 81 6
STEREO AMPLIFIER
MODEL A-757 HAS FIVE VERSIONS:
Type Power requlramem Expert dmlmflon
HEZ AC220V,240V (switchable) West Germany
HE Aczzov,24ov lswhchable) Europian confluent
H8 AC220V.24DV (switchable) Unked Kingdom
KUC ACIZOV only U.S.AV and Canada
so ACI 10v,12ov- 127v,220v,24ov (switchable) u.s.MiIRary
0 This manual is applicable to the A-757/HEZ and HE types.
- For the HE type,refer to page 21 --32.
0 For the other types,refer to additional service manual.
CONTENTS
1 . EXPLODED VIEWS AND PARTS LIST ~~~~~~~~~~~~ 2 5. FOR HE TYPE --------------------------------------- 21
2. SCHEMATIC DIAGRAM ------------------------------ 6 6. SPECIFICASIONS --------------------------------- 33
3. P.C.BOARDS CONNECTION DIAGRAM - ~ 9 7. PANEL FACILITIES ------------------ 34

4_ ELECTRICAL PARTS LIST ------------------ 17

PIONEER ELECTRONIC CORPORATION 44, Meguro IChome. Meguro-ku, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE INC. 90 Box 1760. Long Beach. California 90801 USA.

PIONEER ELECTRONICS OF CANADA. INC. 505 Cochrane Drive, Markham, Ontario L3R 853 Canada

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

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road. Braeside, Victoria 3195, AustraIIa TEL: [03] 58099"

© PIONEER ELECTRONIC CORPORATION 1989 YA MAY 1989 Printedin Japan.

Page 2

1 . EXPLODED' VIEWS AND PARTS LIST

NOTES:

0 Part: withoul part number cannot be supplied.

0 The A mark found on some component pam indicates the importance of the safety

factor of the pan. Therefore, when replacing, be sure to use parts of identical designa-

lion

0 Part: marked by Q " are not always kept in stock. Their delivery time may be longer

than usual or they may be unavailable.

Description

Part No

Mark No.

Description

Part No.

Mark No.

OPERATING INSTRUCTIONS

DIRECT KNOB
POWER KNOB
SPACER SET

STYROL PROTECTOR
PACKING CASE
éééékékéW1Tcu

METAL BONNET
TONE AMP

INPUT SELECTOR

REC OUT
POWER AMP

AWZ2330

4A)FUI

TERMINAL SCREW
EARTH LEAD
TRANS FRAME
RIGHT FRAME
REAR PANEL
PANEL STAY

67390
77778

LONG SHAFT ASSY

BOTTOM PLATE
HEAT SINK

HEAT SINK

HEAT SINK HOLDER
VOLUME HOLDER

12345
86388

SHELD CASEISP)
CUSHION RUBBER C
CUSHION SPACER

SHELD CASE B
SHELD PLATE

67890
88889

)))
LLL
EEF.
EFF:

SSS

WWWWW
EEEEE
RRRRR
CCCCC
35335

84914
90013
20000

.1111
AAAAA
BBBBB
AAAAA

12345
33333

CUSHION RUBBER
PCB HOLDER
NYLON RIVET
SPACER

SPACER

BINDER
CLAMPER

12345
99999

PUSH JOINT

SHEET

67390 1234
99990 0000

EEI

AAN

FLANGE NUT M9
S
M
D

SOFCU SCREW
HOLDER
FRONT PANEL
C

KNOB (PLASTIC)

ROTARY KNOB L
ROTARY KNOB M
ROTARY KNOB S
PUSH KNOB