Pioneer SA-4-L Service manual

SPEAKER SYSTEM

S-A4-LR XMD/E

ORDER NO.

RRV2527

CONTENTS

1. EXPLODED VIEWS AND PARTS LIST

2. SCHEMATIC DIAGRAM

3. PRECAUTIONS OF REASSEMBLY AND
DISASSEMBLY

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2001

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2
6

6

T – ZZV AUG. 2001 Printed in Japan

S-A4-LR

1. EXPLODED VIEWS and PARTS LIST

NOTES:• Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.

1.1 PACKING

The mark found on some component parts indicates the importance of the safety factor of the part.

•

Therefore, when replacing, be sure to use parts of identical designation.

Screws adjacent to mark on the product are used for disassembly.

•

2

1

7

5

6

3

8

4

13

10

11

9

PACKING PARTS LIST

Mark No. Description Parts No.

NSP 1 Accessories Set SME3245

2 Install Instructions SRD1233

(English,Spanish,Chinese)

3 Polyethylene Bag S2 SHL1265

NSP 4 Accessories Set SME3100

5 Spike SBA1188

6 Base SLA1052
7 Polyethylene Bag S0 SHL1259

2

12

Mark No. Description Parts No.

8 Foam Pad SHA2256

9 Foam Pad SHA2257
10 Foam Pad SHA2258
11 Foam Pad SHA2259
12 Packing Case SHG2385

13 Polyethylene Bag S7 SHL1262

1.2 CABINET

S-A4-LR

9

2

1

15

8

13

22

Mid

19

3

Tw

Wf

16

White

18

16

Black

5

17

20

11

12

10

17

6

4

21

13

7

23

13

3

14

CABINET PARTS LIST

Mark No. Description Parts No.

NSP 1 Cabinet SMM1946

2 Grille SMG1713

3 Catch SNK2464
NSP 4 Network Assy (for Wf) SWN1649
NSP 5 Network Assy (for Mid/Tw) SWN1669

NSP 6 Model Label SAN3028
NSP 7 Gasket (for Wf) SEC1493
NSP 8 Gasket (for Mid/Tw) SEC1494

9 Gasket (for Tw cord packing) SEC1495

10 Input Terminal SKX1064

11 Conductor L SKC1065
12 Conductor R SKC1066

Mark No. Description Parts No.

13 Catch SLH1069
14 Speaker (Wf) W16FR90-51D
15 Speaker (Mid/Tw) W13FR82-51DX
16 Screw (for Network Assy) SBA1189
17 Screw

18 Screw (for Wf,Mid/Tw) SBA1191

19 Screw (for Network Assy) SBA1193
NSP 20 Damper(for Input Terminal) SEP1235
NSP 21 Damper(for Duct Board) SEP1236
NSP 22 Damper(for hole for Mid/Tw) SER1297

NSP 23 Damper(for Port) SER1299

(for Input Terminal)

SBA1190

3

S-A4-LR

1.3 ACOUSTIC ABSOBENT ATTACHING

1

(Attach folding twice.)

5

(Attach between the No.1.)

4

(Attach on the No.5.)

5

(Attach between the Back

Board and No.4.)

9 (Attach each one piece to
left and right both sides
of the Network Assy
folding fourth.)

210

2

(Attach to the under part

of the Chamber.)

3

(Attach bending like

L shape.)

6

(Attach folding twice.)

8

(Attach to the
concave part
of Mid/Tw rear.)

(Mid/Tw Rear)

ACOUSTIC ABSORBENT ATTACHING PARTS LIST

Mark No. Description Parts No.

NSP 1 Acoustic Absorbent (200×200) SMT1109
NSP 2 Acoustic Absorbent (190×60) SMT1103
NSP 3 Acoustic Absorbent (380×130) SMT1104
NSP 4 Acoustic Absorbent (190×110) SMT1107
NSP 5 Acoustic Absorbent (160×80) SMV2015

Mark No. Description Parts No.

NSP 6 Acoustic Absorbent (250×320) SMT1112
NSP 7 Acoustic Absorbent (120×100) SMV2012
NSP 8 Acoustic Absorbent (30×30) SMT1108
NSP 9 Acoustic Absorbent (140×210) SMT1105

7 (Attach each one piece to
left and right both sides.)

(Inside chamber)

4

S-A4-LR

1.4 NETWORK ASSY

To lower side of
the input terminal

1.4.1 LPF
[SWN1649]

6 (backside)

3

7 (bottom)

NETWORK ASSY(LPF) PARTS LIST

Mark No. Description Parts No.

1 Choke Coil 4.5 (L1) STH1236

2 Capacitor 27 (C1,C2) SCH1022
NSP 3 Circuit Board SNR1112
NSP 4 Cord SDC1013

Black Tape

4

1

2

2

White Tape

To the Woofer

5

Mark No. Description Parts No.

NSP 5 Cord SDC1015

NSP 7 Damper SER1280

6 Packing SEC1487

1.4.2 HPF
[SWN1669]

No.5 bottom

)15

5

(

8

13
(back side)

To the Tweeter

12

15
(No.6 bottom)

To upper side of
the input terminal

NETWORK ASSY(LPF) PARTS LIST

Mark No. Description Parts No.

1 Capacitor 47 (C1) SCH1023
2 Capacitor 8.2 (C2) SCE1020
3 Capacitor 3.9 (C3) SCE1021
4 Coil 3.0 (L1) STK1031
5 Coil 1.1 (L2) STK1037

7

9

No.4 bottom

14(

)

4

2

3

11

1

To the Mid

6

10

Mark No. Description Parts No.

NSP 9 Cord SDB1143
NSP 10 Cord SDD1281
NSP 11 Cord SDD1299
NSP 12 Cord SDD1278

13 Packing SEC1488

6 Coil 0.27 (L3) STK1035
7 Resistor 39 SCN1031

NSP 8 Circuit Board SNR1113

NSP 14 Damper SER1281
NSP 15 Damper SER1282

5

S-A4-LR

2. SCHEMATIC DIAGRAM

L1

4.5mH

SWN1669

1.1mH

C1

27µF

L2

C1

47µF

C3

3.9µF

L1

3.0mH

C2

27µF

8.2µF

Clear with White

L3

0.27mH

Clear with White

C2

Red

White

Clear

R1

39

Clear

Woofer

Midrange

Tweeter

I N

Conductor

Red

Red

Black

Red

White

Black

Clear with
White

Clear

SWN1649

3. PRECAUTION OF REASSEMBLY AND DISASSEMBLY

3.1 Grille

The grille is fixed to the cabinet with catches, and it can be removed
by pulling it toward you.
When reinstalling, orient the grille with the badge at the bottom.

[Packing for the tweeter connecting cords]

3.2 Woofer

The woofer is attached to the baffle board from the outside with 6
screws.
To remove the woofer, remove the grille first and remove the screws.
To reinstall the woofer, place it so that its terminal board faces
upward.

3.3 Midrange and Tweeter

The midrange and tweeter are integrated into a coaxial unit, and the
coaxial unit is attached to the baffle board from the outside with 4
screws.
To remove this coaxial unit, remove the grille first and remove these
screws. Then remove the packing covering the cord connections of
the tweeter.
When reinstalling the coaxial unit, place the midrange so that its
terminal board faces downward. After reconnecting the tweeter
cords, cover the cord connections by using packing (two SEC1495)
to avoid short-circuiting, as illustrated at right.

Packing
SEC1495

Mid/Tw

6

S-A4-LR

3.4 Network Assy (LPF)

The Network Assy (LPF) is attached to the inside of the rear cover of the cabinet with 4 screws from the inside.
To remove the Network Assy, first remove the grille, remove the woofer, and disconnect the cords from the woofer. Then, remove the input­terminal board by loosening the 4 screws, and disconnect the cords from the input-terminal board. Loosen the 4 screws that secure the Network
Assy, and remove it through the hole in the baffle board.
To reinstall the Network Assy, first connect the cords bundled with black tape from the Network Assy to the lower-side terminals of the input­terminal board, and the cords bundled with white tape to the woofer. Then attach the input-terminal board and the woofer. Place the input­terminal board so that the positive terminals are on the right-hand side, and attach it using the 4 screws. (See the illustration below for placement
of the Network Assy.)

[Placement of the Network Assy (LPF)]

to the lower
input terminal

Screwing

(SBA1189)

Black tape

Screwing

(SBA1189)

White tape

Upper side

to Wf

Network Assy
(LPF)

Screwing

(SBA1189)

Screwing

(SBA1189)

Lower side

3.5 Network Assy (HPF)

The Network Assy (HPF) is attached on the back of the rear board of the chamber with 2 screws(SBA1189) from the outside and 2
screws(SBA1193) from the inside of the chamber.
To remove the Network Assy, first remove the grille, remove the woofer, and disconnect the cords connected to the woofer. Then, remove the
midrange/tweeter coaxial speaker unit and disconnect the cords from the midrange and the tweeter.
When disconnecting the cords from the tweeter, first remove the packing. Then remove the input-terminal board by loosening the 4 screws, and
disconnect the cords from the input-terminal board. Pull out the Network Assy through the hole for the woofer in the baffle board.
When reinstalling the Network Assy, connect the cords by verifying the shapes of the terminals at the ends of the cords.
The cords to be connected to the input-terminal board must be connected to the upper-side terminals of the input-terminal board.
For connections with the tweeter, see 3.3. Make sure that the two cords sticking out the back of the Network Assy go through the hole in the rear
board of the chamber. Then, reinstall the input-terminal board and the woofer. Place the input-terminal board so that the positive terminals are
on the right-hand side, and attach it using the 4 screws. (See the illustration below for placement of the Network Assy and connections.)

[Placement of the Network Assy (HPF) and cord connections]

Packing

Network Assy
(HPF)

to Mid

to Tw

Screwing from Rear

(SBA1189)

Screwing from Front

(SBA1193)

Screwing from Rear

(SBA1189)

Upper side

to the upper
input terminal

Lower side

Screwing from Front

(SBA1193)

7