Pioneer a 504 r service manual

Page 1

Service

Manual 3?
T; * ' ORDER NO.
- 3 O 6
a; M m E 68(9); ARP2894
The illusflnion shows model A-SMR.
STEREO AMPLIFIER
A-5 04 R- G
A-404 R
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODELISI AND TYPEIS).
MM!" Th- vomgc cm In convcncd by Iho
TV" A-som A-SMR-G Mom PM" "WNW following method. ,
NE 0 --' 0 Ac 220v - 230v ac zwv, A
HBW - - 0 ac mv AC unv, I
newz O -- 0 Ac zzov - 230v . Ac 240v. m
«22 - O - Ac 220v - 230v Ac uov. :-

*: All-r m wlflnn of the Pawn-amply block I! the primary wIndlng of Pawn-hunflormu "Ion-Inn
In an 'Llno Vollluo Sobdlon dumlbcd In Scrvloo Manual

0 For the following : A-SIMR/HEWZ ; A-SMRG/HEZ ; A404R/HBW and HEWZ, refer to page 19.

CONTENTS

1. EXPLODED VIEWS, PACKING AND
PARTS LIST
2. SCHEMATIC AND PCB CONNECTION
DIAGRAMIS] .....
3. PCB PARTS LIST ..
4. FOR A-504R/HEWZ, A-504R-GIHEZ.
A-ORIHBW AND HEWZ..
5. PANEL FACILITIES
6. SPECIFICATIONS

PIONEER ELECTRONIC CORPORATION b1. Meguro 1-Chome4 Meguvo-ku, Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE INC. PO Box 1760, Long Beach, CA 908014760, USA.

PIONEER ELECTRONIC IEURDPEI N.V. Haven 1087. Keatbemlaan 1. 9120 Melsele, Belgium

PIONEER ELECTRONICS ASIACENTRE PT E. LTD. 501 Orchard Road. #10430 Lane Crawford Place, Singapore 0923

© PIONEER ELECTRONIC CORPORATION 1995 o ~FFK APR 1995 Printed In Japan

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A-504R, A-504R-G, A-404R

1. EXPLODED VIEWS, PACKING AND PARTS LIST

NOTES:

0 Parts marked by "NSP" are generally unavailable because they are MI in our Master Spare Part: EST.

0 The A marl: found on some componem pm: indicate: the impedance of (he sdeiyfactar of (he pan. T herdore. when replacing. be sure to
use pans of idemiml designation.

0 Pam marked by " O" are not always kept in stock. Their delivery time may be longer than umal or they may be mailable.

1.1 EXPLODED VIEWS
(For A-504R/HE and A-404R/HE)

Mark No. Description Pans No. Mark No. Description ' Paris No.
A I TRANSISTOR (01) (A -304R) ZSC3281 36 ROTARY KNOB S AABI349
A I TRANSISTOR (01) (A -404R) ZSCmIN 37 POWER BUTTON (PIS) AADz421
A 2 TRANSIst (Q2) (A - 504R) zscszsl as FUNCTION BUTTON (PLS) AADZ422
A 2 TRANSISTOR (02) (A-404R) ZSC3IBIN 39 PUSH BUTTON (PLS) AAD2423
A 3 TRANSISTOR (Q3 ) (A - $04k) 2SA1302 4a BONNET CASE (MET) (A -504R) ANE'IOGI
A 3 TRANSISTOR (03) (A -404R) zsA l 26m 40 BONNET CASE (MET) (A -404R) ANE7066
A 4 TRANSISTOR (Q4) (A - 504R) 2SA1302 41 PANEL BASE AMBIZZZ
A 4 TRANSISTOR (Q4) (A --4O4R) 25A1264N 42 FRONT PANEL (A -So4R) ANB7OOB
A 5 POWER TRANSEJRMER (TI) (A ~504R) ATS1537 42 FRONT PANEL (A --404R) ANB7010
A 5 POWER TRANSFORMER (n) (A 40111) ATSIS32 43 AF ASSY (A-SO4R) AWZ7736
6 TERMINAL SCREW AKE-031 43 AF ASS'Y (A -404R) AW27744
7 SHORT PIN PLUG AKMooso 44 INPUT ASSY (A-st) Awnm
A 3 Ac SOCKET 3-P (A-SLRR ONLY) AKP-soz 44 INPUT ASSY (A -404R) sz7745
A 9 FUSE (FUI I'M/250V) (A -504R) AEK - 511 45 CONTROL ASS'Y (A -504R) sz7738
A 9 FUSE (FUI TIM/250V) (A ~404R) AEK -510 45 CONTROL ASS'Y (A -404R) Aw27746
A ID FUSE (Fuz TsmmAflSOV) AER - 505 46 VOLUME ASSY (A -504R) sz7739
(A - 504R ONLY) 46 VOLUME ASS'Y (A -4O4R) AWZ7747
A 11 CUT WIRE (Y2) YIBOWI - 35-35135 NSP 47 TRANS ASS'Y AW27740
A 12 CUT WIRE (Y1) YI8OW9- 3s - 35/35 NSP 48 SP SW ASS'Y AW27741
NSP 13 CHASSIS ANA1489 NSP 49 MUTE SW ASSY (A-SMR ONLY) sz7742
I4 REAR PANEL (A-SO4R) ANC72213 NSP so LOUDNESS ASSY (A-SMR) AW27743
I4 REAR PANEL (A ~404R) ANC7230 NSP SO LOUDNESS ASS'Y (A-404R) AW27748
Is HEAT SINK (A -504R) ANHI428 51 BARRIER AEC7033
IS HEAT SINK (A -404R) ANHIzoo 52 SHEET AEEIoI4
16 FOOT ASSY AECIssl 53 BINDER AEP-215
17 INSULATOR PNW1912 s4 WASHER WA92F140U100
NSP I8 PCB HOLDER (A ~304R ONLY) ANGwaz NSP ss FUSE CARD (A-So4R ONLY) AAx1581
I9 TRANSISTOR COVER LL ANGmo 56 SCREW ABA-29s
(A - 504R ONLY) 57 SCREW (STEEL) Hum
20 CHAMBER FRAME (A -504R ONLY) ANG'ms 58 SCREW (STEEL) ABA1048
21 HEAT SINK HOLDER A (A ~504R ONLY) ANG7027 59 SCREW ABA1082
22 HEAT SINK HOLDER B (A -504R ONLY) ANG7028 60 SCREW (STEEL) AEA1I93
23 HEAT SINK HOLDER c (A -404R ONLY) ANG7029 61 SCREW AEAIzoo
24 REMOCON WINDOW AAK2457 62 SCREW (STEEL) (A -504£1 ONLY) AEAIms
25 PVC RING ADI-1030 63 NUT ABN -065
26 SPRING AEH7055 64 SCREW BETsoPosom
NSP 21 SPACER AEBIzsa 65 SCREW BBZ30P060FMC
23 NYLON BINDHI Mic-093 66 SCREW BnaomaoPMc
NSP 29 PCB SUPPORT AECIZIG 67 NUT NK90FUC
NSP 30 SHIELD PLATE C AEC153II 68 SCREW VM230P060FCU
31 PCB SUPPORT s AEC7027 69 LED LENS AAK2459
32 PCB SUPPORT M AEC7023 70 NAME PLATE (METAL) AAMIosa
33 PCB SUPPORT L AEC7029 71 LED LENS PNW20I9
34 PCB SUPPORT M AEC7031 72 GROUND LEAD (A-404R ONLY) ADXI565
35 ROTARY KNOB L (PLS) AAB1343 73 SCREW BBZ3OP060FMC
74 SPACER AEC1403

75 HOUE PLUG (A ~404R/HBW ONLY) AEC1040