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ORDER NO.

RRV2143

STEREO POWER AMPLIFIER

M-IS21
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
KUCXJ

Model M-IS21
AC120V

Power Requirement

Remarks

This product is a component of a system. For the accessories, instruction manuals etc., refer to the service manuals RRV2149 for XC-IS21MD and RRV2148 for XC-IS21T. This product does not function properly when independent; to avoid malfunctions, be sure to connect it to the prescribed system component(s), otherwise damage may result.
Component CD MD TUNER CD TUNER DECK STEREO POWER AMPLIFIER SPEAKER SYSTEM System IS-21MD XC-IS21MD ­­­ M-IS21 S-IS21 IS-21T ­­­ XC-IS21T M-IS21 S-IS21 Service Manual RRV2149 RRV2148 RRV2143 RRV2141 This Service Manual Remarks

CONTENTS
1. SAFETY INFORMATION ...................................... 2 2. EXPLODED VIEWS AND PARTS LIST ................ 3 3. SCHEMATIC DIAGRAM ....................................... 6 4. PCB CONNECTION DIAGRAM ............................ 8 5. PCB PARTS LIST ............................................... 14 6. ADJUSTMENT .................................................... 16 PIONEER ELECTRONIC CORPORATION 7. GENERAL INFORMATION ................................ 17 7.1 SINGLE OPERATION METHOD ................. 17 8. PANEL FACILITIES AND SPECIFICATIONS .... 18

4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER ELECTRONIC CORPORATION 1999
T ­ ZZK MAY. 1999 Printed in Japan

M-IS21

1. SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.
WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health & Safety Cod e Section 25249.6 ­ Proposition 65

NOTICE (FOR CANADIAN MODEL ONLY) Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must be of identical designation. REMARQUE (POUR MODÈLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces de remplacement doivent avoir la même désignation.

(FOR USA MODEL ONLY) 1. SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60 Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5 mA.

ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. 2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER.

Device under test Test all exposed metal surfaces

Leakage current tester

Reading should not be above 0.5 mA

Also test with plug reversed (Using AC adapter plug as required)

Earth ground

AC Leakage Test

2

M-IS21

2. EXPLODED VIEWS AND PARTS LIST
NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. 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 product are used for disassembly.

2.1 PACKING
1 4 2

¶ PACKING PARTS LIST
Mark No.
1 2 3 4

Description
Side Pad AL Side Pad AR Packing Case AMP MY Packing Sheet

Part No.
AHA7238 AHA7239 AHD7748 AHG7053

3

3

M-IS21 2.2 EXTERIOR
36 32 28 34 26

32 36 36

32

8 36 32

32 20 11 15

19 36 7 36

14

10

31 29 27 6
C1 2 1 C1

1

9

4

32

32 5

36 16 37 38

28 25

32

13

32

4

M-IS21

Caution when disassemble. Even if the power supply code is pulled out from the outlet, neither C11 nor C12 of AF ASSY are discharged. Please discharge C11 and C12 of AF ASSY by the resistor of 100 or more before removing AF ASSY or POWER SUPPLY ASSY. There is a possibility to destroy the transistor, and Please discharge by the resistor of 100 or more.

33 33 21

2 18

30 23 30

22 12

30

30

23

33

33 17 35 3 35

¶ EXTERIOR PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Description
AF Assy AMP Assy POWER SUPPLY Assy PRIMARY Assy SECONDARY Assy HP Assy METER Assy METER CONNECT Assy Power Transformer Fuse (FU1 : 5A) VU Meter DC FAN Motor Chassis A Rear Panel Lens A Rubber Sheet Mold A Mold B Lens Holder A Refrector

Part No.
AWU7343 AWU7342 AWU7344 AWU7348 AWU7350 AWU7352 AWU7353 AWU7356 ATS7250 REK1067 AAW7002 AXM7003 ANA7086 ANC7824 AAK7614 AEB1111 AMR7005 AMR7006 AMR7245 AMR7248

Mark No.
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Description
Holder Power PAC Holder Heat Sink ····· Escutcheon A Top Panel Front Panel A Side Bonnet Screw With Washer Screw Screw Screw Screw Screw Screw Screw Binder BIND Assy

Part No.
ANG7009 ANG7109 ANH7058 AAK7617 AAN7192 AMB7564 ANE7242 ABA1005 ABA1021 FBT40P060FZK BBZ30P080FMC BBZ30P180FMC BMZ30P060FZK BPZ30P350FZK VPZ30P080FMC ZCA-SKB90BK AWU7349

NSP NSP

NSP

NSP

Caution : Be careful when No.10 Fuse(FU1:5A) is exchanged. Please remove No.32 Screw of Rear Panel, remove No.1 AF Assy backward with No.14 Rear Panel, and exchange No.10 Fuse(FU1:5A). (Fuse Caution is displayed in SIDE B of No.1 AF Assy. )

5

1

2

3

4

M-IS21

3. SCHEMATIC DIAGRAM
3.1 AF, AMP, POWER SUPPLY, PRIMARY, SECONDARY, HP, METER and METER CONNECT ASSYS
A

B

B
AMP ASSY (AWU7342)

C

C

POWER SUPPLY ASSY (AWU7344)

D

6

A B C
1

2

3

4

5

6

7

8

M-IS21
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 491002F, MFD BY LITTELFUSE INK. FOR IC42 (AEK7067). CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 4911.25, MFD BY LITTELFUSE INK. FOR IC33 (AEK7048).

Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST"

: AUDIO SIGNAL ROUTE

A

B

F G
METER ASSY (AWU7353)

HP ASSY (AWU7352)

H
METER CONNECT ASSY (AWU7356)

D E
SECONDARY ASSY (AWU7350)

PRIMARY ASSY (AWU7348)

C

CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 491007, MFD BY LITTELFUSE INK. FOR IC11, IC12 (AEK7021). CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 491005, MFD BY LITTELFUSE INK. FOR IC21, IC22 (AEK7019). CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 491004, MFD BY LITTELFUSE INK. FOR IC31 (AEK7018).
REK1067 (5A) AC POWER CORD KUCXJ TYPE : XDG3007

AC120V

D

A

AF ASSY (AWU7343)

CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE NO. 49103.5, MFD BY LITTELFUSE INK. FOR IC41 (AEK7017).

· NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY. 5 6

A D E F G H
7 8

7

1

2

3

4

M-IS21

4. PCB CONNECTION DIAGRAM
A
NOTE FOR PCB DIAGRAMS:
1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. A comparison between the main parts of PCB and schematic diagrams is shown below.
Symbol in PCB Diagrams Symbol in Schematic Diagrams Part Name

3. The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic diagram. 4. Viewpoint of PCB diagrams

Capacitor
B B C E B B C E D D G S G S D G S Field effect transistor C E B C E Transistor with resistor C E B C E Transistor

Connector

SIDE A

P.C.Board

Chip Part

SIDE B

Resistor array

B
3-terminal regulator

4.1 PRIMARY and SECONDARY ASSYS

E
SECONDARY ASSY

D
PRIMARY ASSY

C

A
3101

(ANP7300-C)

D

SIDE A

POWER TRANSFORMER

A

A

N BLUE L BROWN

8

D E
1

2

3

4

1

2

3

4

M-IS21

4.2 HP, METER and METER CONNECT ASSYS

H
METER CONNECT ASSY

A

F
HP ASSY

G
METER ASSY

A CN3105 A CN3104

B

(ANP7300-C)

POWER METER

SIDE A

G
METER ASSY
Q5604

F
HP ASSY

C

IC5601 Q5601

H
METER CONNECT ASSY

Q5602 Q5603

D (ANP7300-C)

SIDE B

1

2

3

F G H
4

9

1

2

3

4

M-IS21 4.3 AF ASSY B
CN3006
IC3302

A

B
CN3003

XC-IS21MD or XC-IS21T

F
J3004

C
B

CN3002

G
J3005

IC82 IC81 Q81

E
3001
C

A
AF ASSY
L BROWN

D D
N BLUE AC IN
LIVE NEUTRAL

D

SIDE A
(ANP7300-C)

10

A

1

2

3

4

1

2

3

4

M-IS21

A
AF ASSY
SIDE B
Q85 Q3603 Q3601 Q3313 Q3602 A

Q3607 Q3608 Q3606 Q3605

B (ANP7300-C) Q3621

Q82

C

D

1

2

3

4

A

11

1

2

3

4

M-IS21 4.4 AMP and POWER SUPPLY ASSYS

C
A

POWER SUPPLY ASSY

IC24 IC23 Q33 Q43

Q42 Q32

Q3651

Q3654 B IC33 IC42

A CN3102 A CN3106 A CN3103
Q3502 Q3501

B
C

AMP ASSY

IC3301

D

SIDE A
(ANP7300-C) Q3352 Q3351

12

B C
1

2

3

4

1

2

3

4

M-IS21

C
IC32 Q31 Q41

POWER SUPPLY ASSY

A

Q3652 Q3653

B

B
Q3311 Q3312

AMP ASSY

C

Q3503 IC3502 IC3501

Q3353 Q3354

D

SIDE B
(ANP7300-C)

1

2

3

B C
4

13

M-IS21

5. PCB PARTS LIST
NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. 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. When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 561 560 56 x 101 RD1/4PU 5 6 1 J 47 x 103 473 47k RD1/4PU 4 7 3 J R50 0.5 RN2H R 5 0 K 1R0 1 RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5.62k 562 x 101 5621 RN1/4PC 5 6 2 1 F
Description Part No.
AWK7515 AWU7343 AWU7342 AWU7344 AWU7348 AWU7350 AWU7352 AWU7353 AWU7356

Mark No.
NSP

Mark No.
C82 C41 C31 C3621 C21, C22

Description

Part No.
CEAT221M25 CEAT222M25 CEAT222M35 CEAT2R2M2A CEAT332M50 CEATR10M50 CKSQYF104Z50 CQMA102K2E

LIST OF ASSEMBLIES
MAIN ASSY AF ASSY AMP ASSY POWER SUPPLY ASSY PRIMARY ASSY SECONDARY ASSY HP ASSY METER ASSY METER CONNECT ASSY

NSP NSP

C3325 C3331­C3334 C9011

A

RESISTORS

AF ASSY
IC82 Q3601, Q3621 Q3602, Q3603, Q3605­Q3608 Q81 Q3313, Q85 Q82 D3601, D3603­D3606, D3609, D3621 D3625, D3626, D3651, D3652 D85­D87 D11, D21 D3608 D31­D34, D41­D44 D81­D84 NJM78M56FA 2SA1037K 2SC2412K 2SD1859X DTA124EK DTC124EK 1SS133 1SS133 1SS133 D3SBA20(A) MTZJ5.6C S5566G(TPB2) S5688G

SEMICONDUCTORS

R1 (2.2M/ 1/2W) R3333, R3334 R82 R3601, R3602 Other Resistors

RCN1080 RD1/4LMF100J RD1/4PU220J RS3LMFR22J RS1/10S J

OTHERS
3101 CN3105 JA3333 CN3332 CN3103 CN3106 CN3102 H1, H2 AN1 J3001 12P CABLE HOLDER 4PJUMPER CONNECTOR 2P PIN JACK 10P SOCKET 5P SOCKET 11P SOCKET 14P SOCKET FUSE CLIP AC INLET 1P JUMPER WIRE 51048-1200 52151-0410 AKB7043 AKP7048 AKP7051 AKP7052 AKP7053 AKR7001 AKP7032 D20PYY1220E XKE3001

COILS AND FILTERS
L1 LINE FILTER L3331, L3332 (1µH) ATF7020 ATH-133

CN3331 4P SPEAKER TERMINAL

TRANSFORMERS
T1 STANDBY TRANSFORMER ATT7049

B
ASR7008 ASR7018

AMP ASSY
IC3501,IC3502 IC3301 Q3354 Q3353 Q3311, Q3312 Q3501, Q3502 Q3503 Q3351 Q3352 D3301, D3302 NJM4558MD STK407-070B 2SA1037K 2SC2412K 2SD2114K 2SK246 DTA124EK IRFI9Z34G IRFIZ34G 1SR139-100

SEMICONDUCTORS

SWITCHES AND RELAYS
RY3601 RY81 SP RELAY/12V

CAPACITORS
C1­C3 (10000pF/AC250V) C11, C12 (2200µF/71v) C3602, C84 C83 C3601 ACG7020 ACH7117 CEAT100M50 CEAT1R0M50 CEAT221M16

14

M-IS21

Mark No.

Description

Part No.
1SS133 LT2A03 MTZJ10C MTZJ18B MTZJ39C

Mark No.

Description

Part No.

D3351­D3354, D3361, D3362 D3355, D3356 D3357, D3358 D3359, D3360 D3363, D3364

RESISTORS
R35 R45 R3659 Other Resistors RD1/2LMF121J RD1/2LMF910J RD1/2PM330J RS1/10S J

CAPACITORS
C3319, C3320 C3317, C3318 C3313, C3314 C3303, C3304 C3506­C3508 C3501, C3502, C3509, C3510 C3315, C3316 C3503, C3504 CCSQCH100D50 CEANP100M35 CEANP2R2M50 CEAT101M50 CEAT1R0M50 CEAT470M25 CKSQYB332K50 CKSQYB682K50

OTHERS
CN3002 14P PLUG AKM7012

D E

PRIMARY ASSY
PRIMARY assembly has no service part.

SECONDARY ASSY
IC41 PROTECTOR(3.5A) IC31 PROTECTOR(4A) IC21, IC22 PROTECTOR(5A) IC11, IC12 PROTECTOR(7A) AEK7017 AEK7018 AEK7019 AEK7021

RESISTORS
R3353, R3354 R3510 Other Resistors RD1/4PU101J RD1/4PU104J J RS1/10S

SEMICONDUCTORS

OTHERS
CN3003 5P PLUG CN3006 11P PLUG AKM7010 AKM7011

OTHERS
3001 12P CABLE HOLDER 51048-1200

C

POWER SUPPLY ASSY
IC33 IC42 IC32 IC23 IC24 PROTECTOR(1.25A) PROTECTOR(2A) AEK7048 AEK7067 NJM4558MD NJM7805FA NJM7905FA 2SB1566 2SC1740S 2SC2412K DTA143ES DTC124EK 1SS133 1SS133 MTZJ24B MTZJ3.0B MTZJ5.1B MTZJ6.8C

F

HP ASSY
R3991, R3992 Other Resistors RS2LMF331J RS1/10S J

SEMICONDUCTORS

RESISTORS

OTHERS
3004 3991 J3004 5P CABLE HOLDER MINI JACK 5P JUMPER WIRE 51048-0500 AKN7003 D20PYY0535E

Q33, Q43 Q32, Q3654, Q42 Q3652 Q3651 Q3653 D3654­D3656, D9021­D9024, D9026 D9029 D9030 D36, D46 D35, D45 D9027, D9028

G

METER ASSY
IC5601 Q5601 Q5602 Q5603, Q5604 D5601, D5605, D5606 D5608 D5604 D5607 NJM4558MD 2SA1037K DTA124EK DTC124EK 1SS133 MTZJ10B MTZJ12B MTZJ5.1B

SEMICONDUCTORS

CAPACITORS
C27, C28, C35, C45 C3652 C25, C26, C3651 C3654 C42, C43 C32, C33 C44 C3653, C9027, C9028 CEAT100M50 CEAT101M16 CEAT1R0M50 CEAT220M35 CEAT470M16 CEAT470M25 CKSQYB102K50 CKSQYF104Z50

CAPACITORS
C5603, C5607 C5604, C5605 CEAT1R0M50 CKSQYF104Z50

RESISTORS
All Resistors RS1/10S J

15

M-IS21

Mark No.

Description

Part No.

6. ADJUSTMENT
There is no information to be shown in this chapter.

OTHERS
5601 3005 J3005 3P CABLE HOLDER 4P CABLE HOLDER 4P JUMPER WIRE 51048-0300 51048-0400 D20PYY0410E

H

METER CONNECT ASSY
D5603 D5602 MTZJ5.6C NSPBF50S-8451

SEMICONDUCTORS

RESISTORS
All Resistors RS1/10S J

OTHERS
5602 J5601 3P CABLE HOLDER 3P JUMPER WIRE 51048-0300 D20PYY0315E

16

M-IS21

7. GENERAL INFORMATION
7.1 SINGLE OPERATION METHOD
Single operation method and inputlevel.
The procedure and the input level of a single operation are shown below. 1. R85 are shorted by 1k. 2. A point of the figure below in four places is connected. GND is not common because it is independent with chassis GND (GND of the amplifier), B1GND, B2GND, and B3GND. The potential of B1GND, B2GND, and B3GND is done by connecting A point in four places as well as chassis GND. 2. The power supply of the product is turned on. 3. the terminal CONT (2 pin of CN3332) are controlled respectively by the following voltages. CONT 5V ON ON

RY MUTE

12V ON OFF

0V OFF ON

4. The signal of 10mV is input from input terminal (JA3333), and the output is confirmed with speaker terminal (CN3331). Note : If the music signal is input directly to input terminal (JA3333) with CD PLAYER etc. , the output becomes a large volume because there are 40dB GAIN of the amplifier.

A AF

ASSY

CONNECT A POINT (GND) (FOUR PLACES) INPUT SIGNAL 10mV CONTROLL 0V, 5V or 12V

SIDE B

OUTPUT SIGNAL

R85 ­ 1k

Caution when disassemble. Even if the power supply code is pulled out from the outlet, neither C11 nor C12 of AF ASSY are discharged. Please discharge C11 and C12 of AF ASSY by the resistor of 100 or more before removing AF ASSY or POWER SUPPLY ASSY. There is a possibility to destroy the transistor, and Please discharge by the resistor of 100 or more.

17

M-IS21

8. PANEL FACILITIES AND SPECIFICATIONS
¶ PANEL FACILITIES ¶ SPECIFICATIONS
7 Amplifier Section

Continuous average power output of 55 watts* per channel, min., at 6 ohms, from 60 Hz to 15,000 Hz with no more than 1.0 %** total harmonic distortion.
Measured pursuant to the Federal Trade Commission's Trade Regulation rule on Power Output Claims for Amplifiers. ** Measured by Audio Spectrum Analyzer. *



7 Micellaneous
Power Requirements .......................................... AC120 V, 60 Hz Power Consumption ............................................. 120 W, 160 VA Power Consumption in standby mode ................................... 1 W Dimensions: Power Amplifier .................... 150 (W) x 300 (H) x 233 (D) mm 5-7/8 (W) x 11-13/16 (H) x 9-3/16 (D) in. Weight: Power Amplifier .......................................... 4.0 kg (8 lb 13 oz)

·
NOTE: Specifications and design subject to possible modification without notice, due to improvements.

¶ POWER OUTPUT METER · PHONES jack

18