Pioneer a 504 r service manual

Page 2

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