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DYNAMIC MODE
HIGH EFFICIENT AMPLIFIER
POWER OUTPUT
DINAMIC -- OFF _ ON
LA21
STEREO POWER AMPLIFIER
ORDER NO.
PROVISIONAL
STEREO POWER AMPLIFIER
M-LA21
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
DBDXCN
Model M-LA21
Power Requirement
AC110-127V / 220-230V / 240V
The voltage can be converted by the following method.
With the Voltage Selector
¶ This product is a system(s) component. This product does not function properly independently ; to avoid malfunctions, be sure to connect it to the prescribed system component(s), otherwise damage may result. ¶ Please connect it to the STEREO CD TUNER XC-LA21, for operation inspection. ¶ System component Table
Component
COMPACT MINI COMPONENT STEREO CD TUNER STEREO POWER AMPLIFIER SPEAKER SYSTEM
Model
X-LA21 XC-LA21 M-LA21 S-LA21
Service manual
RRV2370 RRV2392 RRV2393 RRV2394 This manual.
Remarks
CONTENTS
1. SAFETY INFORMATION ....................................... 2 2. EXPLODED VIEWS AND PARTS LIST ................. 3 3. SCHEMATIC DIAGRAM .......................................... 6 4. PCB CONNECTION DIAGRAM ........................... 12 5. PCB PARTS LIST ................................................ 18 6. ADJUSTMENT ..................................................... 19 PIONEER CORPORATION 7. GENERAL INFORMATION ................................ 7.1 DIAGNOSIS .................................................. 7.1.1 SINGLE OPERATION METHOD ......... 7.1.2 DISASSEMBLY .................................... 8. PANEL FACILITIES AND SPECIFICATIONS .... 20 20 20 21 23
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 EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
c PIONEER CORPORATION 2000
T IZK OCT. 2000 Printed in Japan
M-LA21
1. SAFETY INFORMATION
This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. 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 be of identical designation.
(slow operating fuse) on PCB indicate that replacement parts must
REMARQUE (POUR MODÈLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou de remplacement doivent avoir la même désignation.
(fusible de type lent) sur CCI indiquent que les pièces
(FOR USA MODEL ONLY)
1. SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
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.
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 60Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5mA.
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
Reading should Leakage not be above current 0.5mA tester
Also test with plug reversed (Using AC adapter plug as required)
Earth ground
AC Leakage Test
2
M-LA21
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 the product are used for disassembly.
2.1 PACKING (X-LA21)
15 14 3 6 1 5 4 2 7 9(2/2) 10
O N T
16 8(2/2)
11 13
XC-LA21 REAR
12 8(1/2) 18 18 8(2/2) 11
N T M-LA21 REAR
F SPEAKER SYSTEM TOP SIDE F
R
· PACKING PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 NSP NSP NSP NSP 11 12 13 14 15 16 17 18
Description
AM Loop Antenna Remote Control Unit RCA Audio Cable `AAA' Size R03 Batteries FM Wire Antenna
Part No.
ANT-PMT1E-AL AXD7289 122003220100 130115004000 132030001001
R
O
10 9(1/2)
12 8(1/2)
NSP
17
Power-cord Plug Conversion Adaptor 138011722000 Battery Door 500RC4603070 Polyform Unit 800PMT190001 Polyfoam (Speaker) 800PMT390000 Poly Foam Sheet (C) SP 801999000002 Polythenefoam Sheet PE Polybag (AC Cord) PE Polybag (Remocon) PE Polybag (Antenna) PE Polybag (I Book) Operating Instructions (English/Spanish/Chinese) Carton Corrugate Card 801999000005 805032115000 805035105000 805070100000 805085140000 811PMT391011 813PMT393020 815001405213
3
M-LA21
2.2 EXTERIOR SECTION
51 22 B 18 15 14 16 49 27 3 C C 29
H
B 2 17 D 4 D 49 25 53 53 A 36 53 53 39 53 40 33(×3) 53 49 12 G 50 43 19 38 1 A 45 13 26 53 35 E 53 20 D 52 52 53 47 53 36 52 52 48 42
53 53
9
B C
55 52 52 30
50
53 G 10 E 5 H F F 6 53 52
53
37 A F
E G 7 28 34 53 21 24 11 53 52 54 44 53 53 32 54 44 53 23 31 53 52 46
53
4
M-LA21
· EXTERIOR SECTION PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Description
AMP Assy TRANSFORMER Assy PRIMARY Assy JACK Assy POWER METER Assy LED Assy HP JACK Assy ····· PROTECTION PCB S-Assy PMT3 FP01 Meter Assy Heat Sink Board DC Cord Transformer (TR701) Fuse (F322, F323 : T1AL/250V) Fuse (F328, F329 : T2.5A/250V) Fuse (F321 : T3.15A/250V) Fuse (F324-F327 : T6.3AL/250V) AC Cord Back Cover Diffuser Lens Top Panel Meter Holder Lens Holder Rectifier PCB Bracket PCB Bracket-R Mounting Bracket Power Knob
Part No.
PMT1LA100011 PMT1LA100031 PMT1LA100041 PMT1LA100021 PMT1LA100081 PMT1LA100051 PMT1LA100111 PMT1LA100141 SUBPMT3AMFP SUBPMT3MTR 033PMT1LS100 122006020060 1236C0250140 124010020001 124025020001 124031520003 124063020001 134250220000 500PMT303000 500PMT309000 500PMT311001 505PMT307000 505PMT308000 505PMT370000 505PMT372000 505266422000 510PMT312001
Mark No.
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
Description
Voltage Selector Knob Side Panel-L Side Panel-R Bottom Tray Copper Post Power Switch Bracket Transformer Bracket Mounting Bracket-1 Mounting Bracket-2 Mounting Bracket-3 Mounting Bracket-4 ····· Heat Sink CDG-74 PCB Sheet Bushing Rubber Foot Strain Relief Bushing EMC Label Back Label Serial Label Screw Screw Screw Screw Screw Foot Stand Holding PCB
Part No.
510PMT319000 600PMT117002 600PMT118002 600PMT302000 603PMT381000 605PMT313000 605PMT317000 605PMT373000 605PMT374000 605PMT375000 605PMT376000 6130CDG74000 650PMT377000 700PMT156000 700PMT384000 700036022000 809PMT394030 809PMT396040 809000009000 BBZ30P100FNI BBZ30P180FMC BBZ40P060FMC BPZ30P100FNI KBZ30P060FNI 509PMT329000 PMT1LA-100-121
NSP
NSP
NSP
NSP
5
1
2
3
4
M-LA21
3. SCHEMATIC DIAGRAM
A
3.1 OVERALL WIRING DIAGRAM
E
POWER METER ASSY (PMT1LA100081)
(PH)
3
B
(PH)
4
C
4
From XC-LA21
5
7
IC504 BA4558N
D
JACK ASSY (PMT1LA100021)
7
7
SPEAKER OUT L
(PH)
18 4 4
14
D
A
4 4
IC601 RL601 STK411-230 PLY-DPDT POWER AMPLIFIER
AMP ASSY (PMT1LA100011)
R
6
1 2 3 4
5
6
7
8
M-LA21
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
A
F
LED ASSY (PMT1LA100051)
(PH)
: AUDIO SIGNAL ROUTE : AUDIO SIGNAL ROUTE (PHONES)
(PH)
3
(PH)
G
HP JACK ASSY (PMT1LA100111)
PHONES B
C
D311
From XC-LA21
B
TRANSFORMER ASSY (PMT1LA100031)
D AC IN
C
PRIMAY ASSY (PMT1LA100041)
7
5
6
7
8
1
2
3
4
M-LA21
3.2 AMP, TRANSFORMER and PRIMARY ASSYS
A
A
AMP ASSY (PMT1LA100011)
010-550411-000A
2/2
BA4558DX MTZJ6.2A BA4558DX
B
1/2
003-030840-050
MTZJ6.2A
003-030840-050
018-030036-300A
004-022410-100
011-020602-001A
018-030036-300A
011-025401-000A
C
004-022410-100
006-033200-63D
006-033200-80D
NJM78M12FA
NJM79M12FA
D
CN602
136-08PMT3-200J
D CN22
8
A
1
2
3
4
5
6
7
8
M-LA21
: AUDIO SIGNAL ROUTE (L ch)
D CN4
CN604
HP
: AUDIO SIGNAL ROUTE (PHONES)
A
136-07PMT3-202J
HP
HP
BA4558DX
2/2
BZ605 MTZJ3.0A
128-1221125-000
WH602
Q610 DTA114YS 008-801144-000A
136-04PMT3-350J
HP
BZ604 MTZJ3.0A
Q617 DTA114YS 008-801144-000A
D CN23
B C D
1/2
010-024001-000A
BA4558DX
WH601
136-05PMT3-350J 011-024001-000A
WH1
025-230041-000A
B
124063020001
TRANSFORMER ASSY (PMT1LA100031)
025-230041-000A
CN603
006-033200-63D
136-06PMT3-200J 124010020001 1236C0250140 124025020001 122006020060
011-025401-000A
CN1
135-PHS060-060J 124025020001
006-033200-80D
CN8 135-PHS020-020J
011-020005-000A
128-090109-000A
011-020602-001A
137-400001-000J NEUTRAL
D311 011-024001-000A
011-020005-000A 124031520003 LIVE
AC IN
AC CORD 124250220000
C
011-020005-000A 011-020005-000A
PRIMARY ASSY (PMT1LA100041)
· NOTE FOR FUSE REPLACEMENT CAUTION - FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY.
5
6
7
A B C
8
9
1
2
3
4
M-LA21
3.3 JACK, POWER METER, LED and HP JACK ASSYS
A
D
JACK ASSY (PMT1LA100021)
004-056210-100
A WH602
135-053259-040J
CN23
IC504 BA4558DX
B
004-033210-100
JK501
118-000134-003J
004-056210-100
AUDIO IN L R C
118-020202-0001J
JK502
IC502 BA4558DX MTZJ12B 1/2
MTZJ9.1C
D
10
D
1
2
3
4
5
6
7
8
M-LA21
A
: AUDIO SIGNAL ROUTE (L ch)
HP
: AUDIO SIGNAL ROUTE (PHONES)
E
135-PHS110-110J
POWER METER ASSY (PMT1LA100081)
CN11
136-11PMT3-200J
CN2
B
135-PHS080-080J
G
HP JACK ASSY (PMT1LA100111)
HP JACK ASSY SW501 : DYNAMIC
CN22
A
CN602
135-PHS070-070J
CN3
CN12
136-17PMT3-200J
JK503
HP HP HP HP HP PHONES 116-008020-000
C
050-060060-200J
CN13
CN20
135-053259-040J
HP
021-022322-000A
2/2 IC502 BA4558DX
A CN604
HP
110-033040-013A
135-PHS070-070J
CN4
CN16
135-030060-200J
CN17
110-033162-003A
F
LED ASSY (PMT1LA100051)
D
5
6
7
D E F G
8
11
1
2
3
4
M-LA21
4. PCB CONNECTION DIAGRAM
A
4.1 AMP ASSY
A AMP ASSY
R670
ACGND ACVH1 ACVH2 ACVL1 ACVL2 E
Z1
NOTE FOR PCB DIAGRAMS :
· Part numbers in PCB diagrams match those in the schematic diagrams. · The parts mounted on this PCB include all necessary parts for several destinations. For further information for respective destinations, be sure to check with the schematic diagram. · View point of PCB diagrams.
WH601
WH1
WHT ORN RED BLU BLK
W601
EC625 Z2
Connector
B
Capacitor
D611
SIDE A
Q617
B
W602
P.C.Board
Chip Part
SIDE B
EC620 W603
P3
D612
EC624
R305
D608
D610
D609 W607 C618
CN603 16VAC1 GND 16VAC2 MUTE CTLGND PWRCTL BLK BRN RED ORN YEL WHT
CN1
C
EC623 W604
D607
B
EC622 P2
C619
W605 IC604 W606
E IC605
E
EC621
EC626
EC633
D
SIDE A
12
Q617
A
1
2
3
4
5
6
7
8
M-LA21
D CN23
R621 W610 R668 R669 R657 EC618 R658 D604 Z1 Q609 E EC617 Q608 E
D CN4
A
RL601 R622 CN604 SPKCTL HPRCH HPGND HPLCH CTL GND L+R SIG EC631 PWRCTL C630 EC630 DZ601 WHT WHT WHT WHT WHT WHT RED R602 R601 IC601 R659 R661 WH602
D606
R667
R672 E
R671 D613 W612 W640
Q616 BLK W611
R652 W617 R654 R665 E E E E W619 R603 R664
SPKR ORN GND BLK SPKL BLK GND RED
Q613
R653
R651 Q611
Q612
Q614
R662
R656
R639 Q610
DZ605
DZ604
W614
W616
W602
DZ602
E W613 C631 D615 C636 EC619 Q607 R625 R629 Q615 EC620 L601 R604 Q604 D602 E E W618 Q606 Q605 E W625 C637 R681 BLK. R648 R650 EC616 R647 EC606 D616 R649 R646 R615 C604 W626 C633 R616 C634 W627 W629 W628 EC613 R630 R631 R644 D601 R645 Q602 EC607 EC605 R618 W630 Q601 W638 W639 C606 R617 R606 R613 E R609 L602 EC601 C601 R608 R614 C602
EC602 EC615
P1 EC624
C603
W623 R612 EC603 R610 C635 R619 W624
W622
P3
W621
R605
R607
W620
B
E
C
D614 W609 EC622
R611 EC604
R624
R627
EC609
R632
E R626
R623
R620 EC608 W637
W635 C607 EC611 R633 R637 R641 IC602 C612 E R663 E
R628 AGND LIN AGND RIN AGND -12V GND +12V R640
EC612
C611
DZ603
R636
Q603
CN602
R635
EC626 EC614 C609 W633 EC610 IC603 W634
"BOND"
R642
R634
R638
C610
PMT1LA-01-01 AMP BOARD
Q617 Q616 Q609 Q610 Q607 Q606 Q605 IC603 Q608 Q611 Q613 Q615 Q604 Q603 Q602 Q614 Q612 IC602 Q601 IC601
C608
R643
D
D CN22
7
5
6
A
8
13
1
2
3
4
M-LA21
4.2 TRANSFORMER and PRIMARY ASSYS
A
C PRIMARY ASSY
B
J1
F329
F329
J2
F328
F328 BLK
RED
ORN
YEL
PRIMARY DANGER PMT1LA-01-04 PRIMARY BOARD
R308
BLU
BRN CN9
SW301
CTLGND MUTE
PWR GND. PWRCTL
N
N
L
D311 L RL301
CN8
"BOND"
C
C316
F321
F321
C321
L301 C315
NEUTRAL
D
SIDE A
AC IN
14
C
1
2
3
LIVE
4
5
6
7
8
M-LA21
A
B TRANSFORMER ASSY
PMT1LA-01-03 TRANSFORMER BOARD PRIMARY DANGER
PT1
F322
CN1 PWRCTL GND MUTE 16VAC2 GND 16VAC1 BLK
F323
CN10 BLK
A CN603
B
F324 F325
RED WH1
ORN
ACVH1 RED WHT ACVL1
YEL
ACGND BLK ACVL2 BLU ORN ACVH2
BLU
BRN
F327 F326
A WH601
SIDE A
C
D
5
6
7
B
8
15
1
2
3
4
M-LA21
4.3 JACK ASSY
A
D JACK ASSY
E CN11 A CN602
C557 C529 EC562 EC561 C528 R577 R542 C524 R548 R547
FOR NON-KARAOKE TO EC522
EC527 J54 EC525
C544
R585
R586
"BOND" LIN
R555
R572 EC559 R507 Q516 R599 R593 EC535 Q514 R598 R567 R579
R592
B
ECHOSIG1 +12V ECHOSIG2 VOLGND MICSIG2 -12V MICSIG1 MICGND MICIN MICSW -6dB SW J81
EC546 J564 EC560 EC531 C547 R560 C543 C539
C530
J80
-12V J74 R505 R504 C546
C520
EC544 R594 EC532 R545
J52
J78 AGND
C531
CN2 J59 +12V
DZ506
R590 R597
Q515
EC549
Z1 EC528 EC526 W1
TO EC523
C523 R532
R589
R534 R533
Q511
EC524
Z2
RIN "BOND" JK502 R588 C556 R587
R506
EC523 C518 C517 C525
J71 R558 R501
EC545
CN22 C549 J61 J83 CN3 +12V METER GND HPLCH HPGND HPRCH HPSW R571 Q517
Q518 C541 C548
R591
R580
EC536
C519
C516
R596
R522 R523 R521 J29
EC521
EC513 EC512
PWRCTL METERIN GND HPLCH HPGND HPRCH HPSW
CN4
R520 R575 Q513 J82 Q512 Q504 R552 Q501
D510 R551 EC529 C533 D506 R550 D511 R553 IC502 DZ505 Q502 R549 R569 R570
R518 EC533 JK501 "BOND" EC534 J68 J67 "BOND"
R502
C
EC541
R530 R529 R557 J39
C535
DZ504 J40
R576
R554
R581
E CN12
A CN604 PMT1LA-01-02
CN23 GND SPKL GND SPKR
JACK BOARD
D509 C532 EC530
R584
SIDE A A WH602
Q511 Q515 Q518 Q517 Q516 Q514 IC504 Q513 Q501 Q512 Q504 IC512 IC502 Q502 Q503
D
16
D
1
2
3
C558
MSSOP36-P-450-0.A EC520 EC515 EC514 Q503
AGND RCHOUT AGND LCHOUT AGND
EC522
J563 R503
EC548 EC537 R561
IC504
215CI EC511 EC517
C545 EC518
4
1
2
3
4
M-LA21
4.4 POWER METER, LED and HP JACK ASSYS
A
F
LED503
LED ASSY
PMT1LA-01-05 L1TMP 50-10-A
LED502 LED501
METER ASSY
CN11 ECHOS1 +12V ECHOS2 VOLGND MICS2 -12V MICS1 MIC GND MIC MIC SW DYNAMIC +12V METER LED GND HP Lch HP GND HP Rch HP SW CN12 W3 W4 W5 W6 MIC SW -12V MIC +12V MIC GND +12V DYNAMIC HP Lch HP GND HP Rch HP SW METER
D
CN2
W1
W2
D
CN3
PMT1LA-01-11
CN13
CN14
HPSW
HPRCH HPGND HPLCH DYNAMIC +12V
G HP JACK ASSY
R568 R565 R564
PMT1LA-01-11
+12V MIC -12V MIC SW W554
1
2
3
SW501
CN17 R573 +12v DYNA MIC GND CN16 DYNAMIC GND +12v
E POWER
EC558
R574
CN15
PMT1LA-01-08 PMT1LA-01-08
ECHOS1 +12V ECHOS2 VOLGND MICS2 -12V MICS1
B
C
IC506 EC555 JK504
EC556 CN19 MIC GND EC557 W552 C551 CN20 JK503
SIDE A
D
E F G
4
17
M-LA21
Mark No. Description Part No. Mark No. Description Part No.
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 ........................................................ RD1/4PU 5 6 1 J 560 56 × 101 473 ........................................................ RD1/4PU 4 7 3 J 47k 47 × 103 0.5 R50 ..................................................................................... RN2H R 5 0 K 1 1R0 ..................................................................................... RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5621 ...................................................... RN1/4PC 5 6 2 1 F 5.62k 562 × 101
Mark No.
Description
Part No.
PMT1LA100011 PMT1LA100031 PMT1LA100041 PMT1LA100021 PMT1LA100081 PMT1LA100051 PMT1LA100111
Mark No.
Description
Part No.
CKCYB103K50 CKCYB102K50 CKCYB101K50 CCCCH030D50 CEAT1R0M50 CEAT2R2M2A CEAT2R2M50 CEAT100M50 CEAT101M2A CEAT101M25 CEAT221M16 CEAT331M10 006-033200-63D 006-033200-80D CEAT470M16 CEAT471M25
LIST OF ASSEMBLIES
AMP ASSY TRANSFORMER ASSY PRIMARY ASSY JACK SSY POWER METER AASSY LED ASSY HP JACK ASSY
C618,C619 C630,C631 C636,C637 C601,C602 EC607-EC609,EC618 EC615,EC630,EC631 EC603,EC604 EC619 EC601,EC602 EC621,EC633 EC616 EC617 EC620,EC624 (ELECT3300µF/63V) EC625,EC626 (ELECT3300µF/80V) EC605,EC606,EC610-EC614 EC622,EC623
A
AMP ASSY
IC601 (STK411-230) IC602,IC603 IC604 IC605 Q601,Q602 Q603 Q605-Q608,Q616 Q611-Q614 Q604,Q609,Q615 Q610,Q617 (DTA114YS) D602,D616 D604,D606 (RECTIFIER IN-4001B) D607-D610 (RECTIFIER J-05) D611,D612 (BRIDGE RECTIFIER) D614,D615 (RECTIFIER IN-5401BL) BZ604,BZ605 DZ601,DZ602 010-550411-000A BA4558DX NJM78M12FA NJM79M12FA 2SK246 DTA124ES 2SC1815 2SD1468S 2SA1015 008-801144-000A 1N4148 011-024001-000A 011-020005-000A 011-020602-001A 011-025401-000A MTZJ3.0A MTZJ6.2A
SEMICONDUCTORS
RESISTORS
R603,R605 R608,R609,R615,R616 R652,R654 R664,R665 Other Resistors RS2LMF101J RS1LMF4R7J RS3LMFR22J RS1LMF681J RD1/4PU J
OTHERS
CN602 CN604 WH602 WH601 CN603 HSG PMT3-8A JST PHRHSG PMT3-7C JST PHRHSG MOLEX 51067-0400 HSG MOLEX 51067-0500 HSG PMT3-6A JST PHRJP WIRE AWG22 80MM B JP WIRE AWG26 80MM B ROUND PIN 136-08PMT3-200J 136-07PMT3-202J 136-04PMT3-350J 136-05PMT3-350J 136-06PMT3-200J 051-275080-009J 051-675080-009J 137-500001-000J
COILS
L601,L602 (3µH) 018-030036-300A
RELAY
RL601 (12V OSA-SS-212DM5) 128-122125-000A
B TRANSFORMER ASSY
OTHERS
CN1 WH1 HEADER CTL 6 PINS HEADER MOLEX 5 PINS FUSE HOLDER 7900,HT 135-PHS060-060J 135-053258-050J 550-790000-000J
CAPACITORS
C603,C604,C633,C634 (MYLAR CAP 0.22 uF/100V) C606,C635 C607,C610 C608,C609,C611,C612 004-022410-100 CKCYB471K50 CKCYB682K50 CCCCH100D50
18
M-LA21
Mark No. Description Part No. Mark No. Description
JP WIRE AWG26 50MM R JP WIRE AWG26 50MM B HEDER MOLEX 4PINS 53
Part No.
051-675050-006J 051-675050-009J 135-053259-040J
C PRIMARY ASSY
SEMICONDUCTOR
D311 (RECTIFIER IN-4001B) 011-024001-000A
CN23
RELAY · SWITCH
RL301 (RELAY 9 OSA-SS-212DM) 128-090109-000A SW301 (SLIDE SW VOLT.SELECTOR) 025-230041-000A
E
POWER METER ASSY
CN11 CN12 CN13 CN16 HSG PMT3-11A JST HSG PMT3-7A JST CONN PIN 6 PINS CONN PIN 3 PINS 136-11PMT3-200J 136-07PMT3-200J 050-060060-200J 050-030060-200J
OTHERS
CAPACITORS
C315,C321 (CERAMIC CAP 0.01µF) 003-010320-250A
OTHERS
CN8 HEADER CTL 2 PINS JP WIRE AWG22 BROWN JP WIRE AWG22 ORANGE JP WIRE AWG22 BLUE JP WIRE AWG22 RED JP WIRE AWG22 BLACK JP WIRE AWG22 YELLOW AC CONTACT TERMINAL FUSE HOLDER 7900,HT 135-PHS020-020J 054-010150-010J 054-010150-030J 054-010150-050J 054-010150-061J 054-010150-093J 054-010150-100J 137-400001-000J 550-790000-000J
F
LED ASSY
LED502,LED503 (LED-R-3MM&-S-STP)110-033040-013A LED501 (LED-BL-3MM&-S-&&&) 110-033162-003A
SEMICONDUCTORS
RESISTORS
All Resistors RD1/4PU J
D JACK ASSY
SEMICONDUCTORS
IC502,IC504 Q502,Q515 Q501,Q503,Q513 Q504 Q511 Q512 Q516-Q518 D506,D509,D510,D511 DZ504 DZ505 BA4558DX DTA124ES DTC124ES 2SA1015 DTC114ES 2SC1815 2SK246 1N4148 MTZJ9.0C MTZJ12B
G HP JACK ASSY
SWITCH
SW501 (PUSH BOTTON SWICH 2P2T) 021-022322-000A
OTHERS
JK503 HEADPHONE JACK ST 116-008020-000
CAPACITORS
C541,C543 C539,C546 C547,C548 (MYLAR CAP 5600pF) C549 (MYLAR CAP 3300pF) C556,C557 C533,C558 EC544,EC545 EC532,EC548 EC535,EC536 EC561,EC562 EC531,EC533,EC534,EC537 EC546,EC559,EC560 EC529,EC530,EC541 CKCYB101K50 CKCYF103Z50 004-056210-100 004-033210-100 CKCYB102K50 CGCYF104Z25 CEJQ2R2M50 CEJQ101M16 CEJQ220M16 CEJQ470M16 CEJQ100M16 CEJQ100M16 CEJQ1R0M50
RESISTORS
All Resistors RD1/4PU J
6. ADJUSTMENT
There is no information to be shown in this chapter.
HEADER CTL 7 PINS HEADER CTL 8 PINS HEADER CTL 11 PINS PUSH TERMINAL BOARD PIN JACK BOARD 135-PHS070-070J 135-PHS080-080J 135-PHS110-110J 118-000134-003J 118-020202-001J
OTHERS
CN3,CN4 CN22 CN2 JK501 JK502
19
M-LA21
7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 SINGLE OPERATION METHOD
Please supply +9V from DC power supply to the following point.
C PRIMARY ASSY
J1
F329
F329
J2
F328
F328 BLK
RED
ORN
YEL
PRIMARY DANGER PMT1LA-01-04 PRIMARY BOARD
R308
BLU
BRN CN9
SW301
CTLGND MUTE
PWR GND. PWRCTL
N
N
L
D311 L RL301
CN8
"BOND"
C316
F321
F321
DC power supply DC+9V GND
C315
C321
L301
20
M-LA21
7.1.2 DISASSEMBLY 1 1
×2 ×2
10
×2
10
×2
1
×2
10
×2
1
×2
10
Front Panel
×2
10 11
Mounting Bracket
Side Panel L (Remove it as Side Panel R in the same way.)
12
×4
2
8 3 7
×2
9
Remove it of R side in the same way.
8
×2
Mounting Bracket-4
Slide the Side Panel R toward the rear, then remove it. Side Panel R
15
Remove a Strain Relief.
16
5
Top Panel Unhook
Disconnect a Connector (CN8).
4
×2
5
13
13
×4
14
13
5
Unook × 2
Unhook
6
×2
21
M-LA21
18 17
Transformer Bracket
17
19
Diagnosis D JACK Assy
F LED Assy
A AMP Assy E POWER METER Assy G HP JACK Assy
B TRANSFORMER Assy
C PRIMARY Assy
22
M-LA21
8. PANEL FACILITIES AND SPECIFICATIONS
8.1 PANEL FACILITIES
Front Panel
DYNAMIC MODE
HIGH EFFICIENT AMPLIFIER
2 3
POWER OUTPUT
DINAMIC -- OFF _ ON
4 1
LA21
STEREO POWER AMPLIFIER
1 2
PHONES socket Plug in a pair of headphones for private listening.
DYNAMIC
3 4
POWER OUTPUT meter Shows the output level of the currently selected source. DYNAMIC Switch on for extra power in the bass and a richer treble.
DYNAMIC MODE indicator Lights when the is switched on.
23
M-LA21
8.2 SPECIFICATIONS
Power Section & Miscellaneous
Power Requirements
............................ AC 110-127/220-230/240 V (switchable), 50/60 Hz Power Consumption (ON mode) (Total including XC-LA21) ........................... 538 W Power Consumption (Standby mode) ............................ 1 W
Dimensions
Stereo power amplifier ......... 160(W) x 176(H) x 315(D) mm
Weight
Stereo power amplifier ................................................ 5.1 kg
NOTE: Specifications and design subject to possible modification without notice, due to improvements.
24