Pioneer MIS-21 Service manual

ORDER NO.

RRV2129

STEREO POWER AMPLIFIER

M-IS21

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Type

MYXJ AC220-230V
NVXJ AC230V

This product is a component of a system.
For the accessories, instruction manuals etc., refer to the service manuals RRV2124 for
XC-IS21MD and RRV2123 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.

Model

M-IS21

Power Requirement Remarks

Component

CD MD TUNER XC-IS21MD ––– RRV2124
CD TUNER DECK ––– XC-IS21T RRV2123
STEREO POWER AMPLIFIER M-IS21 M-IS21 RRV2129 This Service Manual
SPEAKER SYSTEM S-IS21 S-IS21 RRV2128

IS-21MD IS-21T

System

Service Manual Remarks

CONTENTS

1. SAFETY INFORMATION

2. EXPLODED VIEWS AND PARTS LIST

3. SCHEMATIC DIAGRAM

4. PCB CONNECTION DIAGRAM

5. PCB PARTS LIST

6. ADJUSTMENT

PIONEER ELECTRONIC CORPORATION 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

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14
16

2
3
6
8

7. GENERAL INFORMATION

7.1 SINGLE OPERATION METHOD

8. PANEL FACILITIES AND SPECIFICATIONS

T – ZZK APR. 1999 Printed in Japan

................................

.................

....

17
17
18

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 Code 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.

Reading should
not be above

0.5 mA

Earth
ground

Device
under
test

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

Test all
exposed metal
surfaces

AC Leakage Test

Leakage
current
tester

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 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.

on the schematics and

2

2. EXPLODED VIEWS AND PARTS LIST

NOTES:

2.1 PACKING

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.

M-IS21

4

21

¶ PACKING PARTS LIST

Mark No. Description Part No.

1 Side Pad AL AHA7238
2 Side Pad AR AHA7239
3 Packing Case AMP MY AHD7747
4 Packing Sheet AHG7053

3

3

M-IS21

2.2 EXTERIOR

36

28

32

32

32

36

15

26

36

19

8

36

7

36

32

20

11

36

34

32

14

16

25

27

32

10

31

29

6

9

5

37

38

4

28

C11

C12

36

1

32

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 Ω 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 Ω or more.

33

33

30

21

2

18

30

23

12

35

35

(1) EXTERIOR PARTS LIST

Mark No. Description Part No.

1 AF Assy A WU7337
2 AMP Assy AWU7340

3 POWER SUPPLY Assy AWU7344
NSP 4 PRIMARY Assy AWU7345
NSP 5 SECONDARY Assy AWU7350

6 HP Assy AWU7351

7 METER Assy AWU7353

8 METER CONNECT Assy AWU7356

9 Power Transformer ATS7249

10 Fuse (FU1 : T2.5A) REK1026

17

30

33

33

30

22

23

3

Mark No. Description Part No.

21 Holder ANG7009
22 Power PAC Holder ANG7109
23 Heat Sink ANH7058
24 • • • • •
25 Escutcheon A AAK7617

26 Top Panel AAN7192
27 Front Panel A AMB7564
28 Side Bonnet ANE7242
29 Screw With Washer ABA1005
30 Screw ABA1021

11 VU Meter AAW7002
12 DC FAN Motor AXM7003

NSP 13 Chassis A ANA7086

14 Rear Panel See Contrast table (2)
15 Lens A AAK7614

16 Rubber Sheet AEB1111
17 Mold A AMR7005
18 Mold B AMR7006
19 Lens Holder A AMR7245
20 Refrector AMR7248

31 Screw FBT40P060FZK
32 Screw BBZ30P080FMC
33 Screw BBZ30P180FMC
34 Screw BMZ30P060FZK
35 Screw BPZ30P350FZK

36 Screw VPZ30P080FMC
37 Binder ZCA-SKB90BK

NSP 38 BIND Assy AWU7349

(2) CONTRAST TABLE

M-IS21/MYXJ and NVXJ are constructed the same except for the following :

Mark No. Symbol and Description

14 Rear Panel ANC7823 ANC7839

MYXJ Type NVXJ Type

Part No.

Remarks

5

1

23

4

M-IS21

3. SCHEMATIC DIAGRAM

3.1 AF, AMP, POWER SUPPLY, PRIMAR Y , SECONDAR Y, HP, METER and METER
CONNECT ASSYS

A

B

B

AMP ASSY
(AWU7340)

C

POWER
SUPPLY

C

ASSY
(AWU7344)

D

6

1234

CBA

5

678

M-IS21

CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,

CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,

REPLACE ONLY WITH SAME TYPE NO. 491002F, MFD BY
LITTELFUSE INK. FOR IC42 (AEK7067).

REPLACE ONLY WITH SAME TYPE NO. 4911.25, MFD BY
LITTELFUSE INK. FOR IC33 (AEK7048).

: AUDIO SIGNAL ROUTE

Note : When ordering service parts, be sure to refer to "EXPLODED

VIEWS and PARTS LIST" or "PCB PARTS LIST"

A

B

E

SECONDARY
ASSY
(AWU7350)

G

METER ASSY (AWU7353)

F

HP ASSY (AWU7351)

D

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.

REK1026
(T2.5A)

FOR IC31 (AEK7018).

METER
CONNECT
ASSY
(AWU7356)

PRIMARY
ASSY
(AWU7345)

AC POWER CORD
MYXJ TYPE : XDG3001
NVXJ TYPE : ADG1156

H

C

• NOTE FOR FUSE REPLACEMENT

CAUTION -

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS ONLY.

5

AC220-230V

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

A

AF ASSY
(AWU7337)

HGFEDA

6

7

8

D

7

1

23

M-IS21

4. PCB CONNECTION DIAGRAM

NOTE FOR PCB DIAGRAMS:

A

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

BCE

Symbol in Schematic
Diagrams

BCE

BCE

Part Name

Transistor

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

Connector

4

Capacitor

SIDE A

BCEBCE

BCE

DGSDGS

DGS

B

Transistor
with resistor

Field effect
transistor

Resistor array

3-terminal
regulator

P.C.Board Chip Part

4.1 PRIMARY and SECONDARY ASSYS

E

SECONDARY ASSY

SIDE B

D

PRIMARY ASSY

C

A

3101

POWER TRANSFORMER

(ANP7300-C)

D

8

D E

SIDE A

A

A

N BLUE

1234

L BROWN

1

234

4.2 HP, METER and METER CONNECT ASSYS

M-IS21

H

METER
CONNECT
ASSY

A

CN3105

G

METER ASSY

A

CN3104

A

F

HP ASSY

B

(ANP7300-C)

H

METER
CONNECT
ASSY

POWER METER

G

METER ASSY

Q5604

IC5601
Q5601

Q5602
Q5603

SIDE A

C

F

HP ASSY

D

(ANP7300-C)

SIDE B

HGF

1

2

3

4

9

1

M-IS21

4.3 AF ASSY

23

4

A

IC3302

B

CN3006

B

CN3003

F

J3004

XC-IS21MD

or XC-IS21T

C

B

CN3002

G

J3005

C

AF
ASSY

L BROWN

N BLUE

AC IN

D

IC82
IC81

Q81

E

3001

A

D
D

NEUTRAL

LIVE

SIDE A

(ANP7300-C)

10

A

1234

A

1

234

M-IS21

AF
ASSY

SIDE B

(ANP7300-C)

Q3313
Q3602

Q85
Q3603

Q3601

Q3607
Q3608

Q3606
Q3605

Q3621

A

B

Q82

C

D

A

1

2

3

4

11

1

23

M-IS21

4.4 AMP and POWER SUPPLY ASSYS

4

C

A

POWER

IC24
IC23
Q33
Q43

SUPPLY
ASSY

Q42
Q32

Q3651

Q3654

B

IC33
IC42

A

CN3102

A

CN3106

B

C

AMP

A

CN3103

Q3502
Q3501

ASSY

IC3301

D

12

B C

SIDE A

(ANP7300-C)

1234

Q3352
Q3351

1

234

M-IS21

C

IC32

Q31
Q41

Q3652
Q3653

POWER
SUPPLY
ASSY

A

B

Q3311
Q3312

Q3503
IC3502

IC3501

Q3353
Q3354

B

AMP
ASSY

SIDE B

(ANP7300-C)

C

D

CB

1

2

3

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%).

560
47k

0.5
1

56 x 10
47 x 103
R50
1R0

Ex.2 When there are 3 effective digits (such as in high precision metal film resistors).

5.62k RN1/4PC F562 x 10

1

561
473

RD1/4PU J
RD1/4PU J
RN2H K
RS1P K

1

5621

561
473

R50

1R0

5621

Mark No. Description Part No.

LIST OF ASSEMBLIES

NSP MAIN ASSY AWK7512

AF ASSY AWU7337
AMP ASSY AWU7340

POWER SUPPLY ASSY AWU7344
NSP PRIMARY ASSY AWU7345
NSP SECONDARY ASSY AWU7350

HP ASSY AWU7351

METER ASSY AWU7353

METER CONNECT ASSY AWU7356

AF ASSY

A

SEMICONDUCTORS

IC82 NJM78M56FA

Q3601, Q3621 2SA1037K

Q3602, Q3603, Q3605–Q3608 2SC2412K

Q81 2SD1859X

Q3313, Q85 DTA124EK

Q82 DTC124EK

D3601, D3603–D3606, D3609, D3621 1SS133

D3625, D3626, D3651, D3652 1SS133

D85–D87 1SS133
D11, D21 D3SBA20(A)

D3608 MTZJ5.6C
D31–D34, D41–D44 S5566G(TPB2)
D81–D84 S5688G

Mark No. Description Part No.

C83 CEAT1R0M50

C3601 CEAT221M16
C41 CEAT222M25
C31 CEAT222M35

C3621 CEAT2R2M2A

C21, C22 CEAT332M50
C82 CEAT471M25

C3325 CEATR10M50

C3331–C3334 CKSQYF104Z50

C9011 CQMA102K2E

RESISTORS

R3333, R3334 RD1/4LMF101J

R82 RD1/4PU220J

R3601, R3602 RS3LMFR22J

Other Resistors RS1/10S J

OTHERS

3101 12P CABLE HOLDER 51048-1200
CN3105 4PJUMPER CONNECTOR 52151-0410

JA3333 2P PIN JACK AKB7043
CN3332 10P SOCKET AKP7048
CN3103 5P SOCKET AKP7051

CN3106 11P SOCKET AKP7052
CN3102 14P SOCKET AKP7053

H1, H2 FUSE CLIP AKR7001
AN1 AC INLET 1P BKP1046

J3001 JUMPER WIRE D20PYY1220E

COILS AND FILTERS

L1 LINE FILTER ATF7019
L3331–L3334 (1µH) ATH-133

TRANSFORMERS

T1 STANDBY TRANSFORMER ATT7050

SWITCHES AND RELAYS

RY3601 SP RELAY/12V ASR7008

RY81 ASR7018

CAPACITORS

C1–C3 (10000pF/AC250V) ACG7020

C3345, C3346 (10000pF/100V) ACG7021

C11, C12 (2200µF/71v) ACH7117

C3551–C3554 CCSQCH331J50
C3602, C84 CEAT100M50

14

CN3331 4P SPEAKER TERMINAL XKE3001

AMP ASSY

B

SEMICONDUCTORS

IC3501,IC3502 NJM4558MD
IC3301 STK407-070B

Q3354 2SA1037K

Q3353 2SC2412K

Q3311, Q3312 2SD2114K

Q3501, Q3502 2SK246

Q3503 DTA124EK
Q3351 IRFI9Z34G
Q3352 IRFIZ34G
D3301, D3302 1SR139-100

M-IS21

Mark No. Description Part No.

D3351–D3354, D3361, D3362 1SS133

D3355, D3356 LT2A03

D3357, D3358 MTZJ10C

D3359, D3360 MTZJ18B

D3363, D3364 MTZJ39C

CAPACITORS

C3319, C3320 CCSQCH100D50
C3327, C3328 CCSQCH680J50
C3317, C3318 CEANP100M35
C3313, C3314 CEANP2R2M50

C3303, C3304 CEAT101M50

C3506–C3508 CEAT1R0M50
C3501, C3502, C3509, C3510 CEAT470M25
C3315, C3316 CKSQYB332K50
C3503, C3504 CKSQYB682K50
C3308 CKSQYB822K50

RESISTORS

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

OTHERS

CN3003 5P PLUG AKM7010
CN3006 11P PLUG AKM7011

POWER SUPPLY ASSY

C

SEMICONDUCTORS

IC33 PROTECTOR(1.25A) AEK7048
IC42 PROTECTOR(2A) AEK7067

IC32 NJM4558MD
IC23 NJM7805FA
IC24 NJM7905FA

Q33, Q43 2SB1566

Q32, Q3654, Q42 2SC1740S

Q3652 2SC2412K

Q3651 DTA143ES

Q3653 DTC124EK

D3654–D3656, D9021–D9024, D9026 1SS133

D9029 1SS133

D9030 MTZJ24B

D36, D46 MTZJ3.0B

D35, D45 MTZJ5.1B

D9027, D9028 MTZJ6.8C

CAPACITORS

C27, C28, C35, C45 CEAT100M50

C3652 CEAT101M16

C25, C26, C3651 CEAT1R0M50

C3654 CEAT220M35

C42, C43 CEAT470M16

Mark No. Description Part No.

RESISTORS

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

OTHERS

CN3002 14P PLUG AKM7012

PRIMARY ASSY

D

PRIMARY assembly has no service part.

SECONDARY ASSY

E

SEMICONDUCTORS

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

OTHERS

3001 12P CABLE HOLDER 51048-1200

HP ASSY

F

COILS AND FILTERS

L3992–L3994 CHIP BEADS VTL1096

CAPACITORS

C3991, C3995, C3996 CKSQYB472K50

RESISTORS

R3991, R3992 RS2LMF331J

OTHERS

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

METER ASSY

G

SEMICONDUCTORS

IC5601 NJM4558MD
Q5601 2SA1037K
Q5602 DTA124EK
Q5603, Q5604 DTC124EK
D5601, D5605, D5606 1SS133

D5608 MTZJ10B
D5604 MTZJ12B
D5607 MTZJ5.1B

C32, C33 CEAT470M25

C44 CKSQYB102K50

C3653, C9027, C9028 CKSQYF104Z50

CAPACITORS

C5603, C5607 CEAT1R0M50
C5604, C5605 CKSQYF104Z50

15

M-IS21

Mark No. Description Part No.

RESISTORS

All Resistors RS1/10S J

OTHERS

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

METER CONNECT ASSY

H

SEMICONDUCTORS

D5603 MTZJ5.6C
D5602 NSPBF50S-8451

RESISTORS

All Resistors RS1/10S J

OTHERS

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

6. ADJUSTMENT

There is no information to be shown in this chapter.

16

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 1kΩ.

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

12V 5V 0V
RY ON ON OFF
MUTE OFF ON 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.

M-IS21

A

AF
ASSY

CONNECT
A POINT (GND)
(FOUR PLACES)

INPUT SIGNAL
10mV

CONTROLL
0V, 5V or 12V

SIDE B

OUTPUT SIGNAL

R85 – 1kΩ

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 Ω 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 Ω or more.

17

M-IS21

8. PANEL FACILITIES AND SPECIFICATIONS

¶ PANEL FACILITIES

¶ SPECIFICATIONS

7 Amplifier Section

Continuous Power (RMS) .................................. 100 W + 100 Wz

(1 kHz, THD 10%, 6 Ω)

Continuous Power (DIN)..........................................65 W + 65 W

(1 kHz, THD 1%, 6 Ω)

Music Power (DIN) ..............................................150 W + 150 W

(1 kHz, THD 1%, 6 Ω)

¶ Above specifications are for when the power supply is 230 V.

¶

7 Micellaneous

Power Requirements .............................. AC220-230 V , 50/60 Hz

Power Consumption ..........................................................120 W

Power Consumption in standby mode ...................................1 W

Dimensions:

Power Amplifier ....................150 (W) x 300 (H) x 233 (D) mm

Weight:

Power Amplifier .............................................................4.0 kg

NOTE:

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

•

¶ POWER OUTPUT METER

• PHONES jack

18